Posted:2006-09-20 By video card review Number of View:107199
X1900 GT REVIEW UNLOCKING
OVERCLOCKING VOLTMOD
By :video card review
Posted:2006-09-20
xtreview is your : Video card - cpu - memory - Hard drive - power supply unit source
The producers graphic chips egularly
announce better performante solutions. Before the end of this year both
graphic giants plan to release products with support Of directX 10 (former WGF
2.0) and SM 4.0. However, high end video card do not interest all user due to price witch lay with more than five hundred dollars. And then, after
a wile, companies start to make less performer card with average price
range.
In the upper segment of the highly productive solutions at the given moment everything is sufficiently quiet, based there on ATI radeon
x1900 XT/ XTX and NVIDIA geForce 7900 GTX divide this niche approximately
equally. But, after presenting GeForce 7900 GTX, NVIDIA immediately release
GeForce 7900 GT, aimed at the price category of ~300$, and GeForce 7600 GT,
which falls into the price niche of 200$. To the output Of geForce 7600 GT has got ATI
replay by the release of the reduced version X1800XL on base Of r520 -
Radeon x1800 GTO with 12 pipeline. The latter possesses good performance, but its price proved to be higher than in competitor.
Answer to GeForce 7900 GT in ATI was finished originally –
Radeon x1800 XT 256 MB., whose cost fall to the same
categorie. But the reserves of chips r520 are low, therefore, as soon as the
suitable crystals r580 reached the desired volumes, for ati appeared the Radeon x1900 GT. This product is the built in x1900 XT version
, but it possesses sufficiently lower characteristics with – 12
textural blocks (TMU) and 36 pixel shader processors. In this case we
will not forget, that this only temporary solution, which will exist to the
announcement of chips RV560 and RV570, witch production will be fixed on 80 nm
technical process. It is assumed that the processor RV570 has equal or even
higher performance in comparison with R580, reduced to the level Of radeon
x1900 GT, but it costs less.
Let us explain, how successful in ATI came out the Radeon x1900 GT,
let us compare it with Radeon x1900 XTX and Radeon x1800 GTO, and
certainly, let us try to unblock pipeline.
Sapphire radeon x1900 GT.
video card tested was from the sapphire company
with retail assembly .box Formulation was in the typical
sapphire style:
Sapphire radeon x1900 GT Box Assembly is standard as in the majority Of retail versions
of sapphire video card :
Sapphire radeon x1900 GT Assembly
Adaptator- fHDTV and VIVO
Cable S -Video
Cable and adapter HDTV
Two adapters DVI/D -Sub (15- pin)
Cable for additional power connection
CD with the drivers and utility
CD with powerDVD
CD with power director video editing
DVD “Sapphire Of select”
User Book in six languages
The design of board is reference, but it use not that version that we
saw in Radeon x1900 XT/XTX, but the simplified diagram Of radeon x1800 XT,
used for the production Of radeon x1800 GTO/XL. A smaller quantity of
functional blocks in comparison with X1900 XT/ XTX, and also considerably
smaller frequencies, make possible to use the light power circuits
design of this card. For sure, this badly will affect the overclocking frequency, but
this we will check lately.
Cooling is same as in Radeon x1800 GTO/XL, The fan form is only somehow changed ; therefore it is not necessary
to speak about its high efficiency. The memory modules are located on the
face side and they are making contact with the radiator through the thick
thermo-padding.
Video card possesses 256 MB memory of type GDDR3 from samsung
production , the acess time being at 1,4
ns .The Memory operates at frequency of 600 (1200) MHz, but the declared
characteristics of chips samsung K4J55323QG-BC14 correspond to 700 (1400) MHz, so
here we had quite large overclocking capability.
The presence of two ports DVI with HDCP support , and also HDMI
through adapter, Like all ATI video card series x1800/ x1900,
Radeon x1900 GT supports VIVO (TV-Out TV- In interface, HDTV-Out) - on the
board we can find the rage theater chip .
P/N in 102A5202250- . is very
interesting keep this noted…
identification Of x1900 GTO:
On another - X1900 GT:
Apparently, the reference with the suffix GT of this model,
was accepted into the last moment before the announcement . Possibly, they saved up suffix GTO for model on the base of RV570, but thus far this is only
assumption.
Fundamental characteristics Of sapphire ATI radeon x1900 GT comparison
with Radeon x1800 GTO and radeon x1900 XTX:
Fundamental characteristics
Radeon x1800 GTO
Radeon x1900 GT
Radeon x1900 XTX
Graphic chip
R520
R580
R580
Technical process, m
0.09 high- k
0.09 high- k
0.09 high- k
Number of transistors, mln.
321
384
384
Frequency, MHz
500
575
650
Memory bus width, bits
256
Memory Type
GDDR3
Memory Volume , MB.
256
256
512
Frequency of , MHz
500 (1000)
600 (1200)
775 (1550)
Memory capacity , Gb/
32
37,5
49,6
Number of pixel shader processors
12
36
48
Number of textural blocks
12
12
16
Number Of rOP's
12
12
16
Fill rate
6000
6900
10400
DirectX version
9.0c
Pixel shader Version
3.0
Vertex shader Version
3.0
Interface
PCI- E 16x
As can be seen from table - The Radeon x1900 GT lost a sufficiently
significant quantity of functional blocks . Frequencies are also lower than x1900xtx. Relative to Radeon x1900 XTX they were reduced by 75 and 175 (350) MHz
for the video processor and memory respectively. It should be noted that
Radeon x1900 GT is equipped only with 256 MB. of memory.The release of 512 MB version is not planned.
Relatively to the r520 (Radeon x1800 GTO), The
radeon x1900 GT has significant advantage: textural blocks (TMU) , and here the quantity of pixel shader processors is three times larger – 36. Certainly, we will not forget, and about others important
architectural distinguishing different frequencies, but we do not doubt, that in
this case the pixel shader pipeline will give the large performance addition , so the higher is the mathematical complexity of shader, the
more significant it is.
With the release of driver catalyst 6.6,the Radeon x1900 GT
get to support of technology crossFire . This means
that the expensive master- map x1900 crossFire edition is not necessary
– will replace with the second radeon x1900 GT. The exchange of data
occurs through the PCI- E 16X bus;
Overclocking, temperature conditions, and 2d quality Sapphire ATI radeon x1900 GT.
In 2d regime , The ambiant temperature was approximately 30 degree Celsiuss, this card heat a lot. Even with such ombiant temp the card worked in region of 62-63 degree Celsiuss. Fan at this temperature was at the rotation speed of about 2600 r/min . Just as the Radeon x1900 XT/ XTX, in this r580 model was supported the separated frequencies and voltage on 2d and 3d. In “2d” regime the video processor works at 499,5 MHz, but memory don't have separate regimes and
work at constant frequency of 594 MHz.
Immediately after the installation of the board we start the test with 3DMark 05, was revealed very unpleasant special feature - card
persistently refuse to pass into 3d regime. First we checked
the work of service, which corresponds for the frequencies control and
stresses (“ATI hot key poller”) but it was
innocent. It was necessary to search for another solution, and we find out
that the problems are in the regular bios. After flashing with other radeon x1900 GT bios, the 3d
requencies regime start to work normally .
To test for stability using the new bios we used the HDR- test
deep freeze from the composition of 3d Mark 06, and repeted it 15 times.
As a result maximum temperature registered was in the level of ~88 of degree Celsiuss, and from the 3400 r/min region
we transfer through barrier into 88 degrees, the rotation speed
passe to ~ 4300 r/min . In 3d operating mode, the graphic processor frequency automatically
rises to 575 MHz, and voltage - from 1,2 to 1,25 volts.
Unfortunately, cooling system proved to be very noisy. If the
sound, published by fan on 3400 r/min, still can be borne, then on 4300 r/min it
becomes serious stimulus.For overclocking we used the utility rivaTuner version 2.0 RC 16. to check
the frequencies stability was used Deep freeze from the test
3d Mark 06, which was repeated 15 times eath check.
With overclocking everything was sufficiently predicted: the
simplified board design , ineffective cooling, reduced voltage (relative to X1900
XT/ XTX) do not make possible to hope for good result. On this copy it
was possible to attain stable work at the frequency of 615 MHz, increase was by 40
MHz – this only 7% from the default. Raising vcore using the utility
overclocker-x1k in to 1,45 volts (level radeon x1900 XTX), we obtained
the same result.
Honestly speaking,with the cuurent deficiencies in the design, we
expected to obtain at least the frequency, at which works Radeon x1900 XT/
XTX (650 MHz). Apparently, are shown the power limitations (we already explained the overclocking frequency Of radeon x1900 XT/ XTX, increase
in the stress on the power circuits GPU it has no effect because of the work temperature
witch is close to the maximum). Possibly, after the replacement of cooling by
more effective one, it will be possible to attain the better result , but we
do not have possibility to verify this at the moment. Let us simply note
that the installation of fan with 100% regime did
not make possible to raise the frequency above 615 MHz.
Now let us passe for the memory : the chips Of samsung 1,4 ns took
a step beyond the limits of their default possibilities, after being clocked at the frequency of 837 (1674) MHz and after passing Radeon x1900 XTX with the
memory samsung 1,1 ns, witch work with frequency of 810 (1620) MHz.. The
increase in the the memory voltage do not influenced the overclocking capability. Here
it should be noted that timing of the memory x1900 GT are most likely
less aggressive than in X1900 XTX, which, probably, has a effect on frequency
potential.
Temperature conditions practically in this case did not change – the maximum temperature of processor was located in the region of 88 degree
Celsiuss, the general temperature of the card also remained as before - 55 degrees.
However, temperature on the chip became more constant and the fan rotation work stable at 4300 r/min.
The 2d quality was pretty good.
Unlocking graphic processors pipeline 1900gt
We all remenber the good time where most user where able to unlock their 9500 card into 9700 .witch was high en class card tose day.
Alas, chances to open pipeline in Radeon x1900 GT is very
small. ATI rolled well their 100-percent blocking even on the chips R4XX, yes
even Radeon x1800 GTO, which we tested earlier, could not be unlcoked.
However, to verify stands.
Bios from Radeon x1900 XT/ XTX for the
transformation cannot be used - the different memory capacity ,
different memory chips , difference in timing. After flashing you will
most likely see nothing :-) except continuous artefacts; therefore it is necessary
to modify the native bios.
For the beginning ASIC config was used in
correspondence with bios Of radeon x1900 XTX. In the
hex- code on the displacement bytes of 0x7A: in X1900 XTX it is equal
0x49, while in X1900 GT to – 0x 4b.
Bios code from x1900 XTX:
Bios code from X1900 GT:
Bios was then used to flash the card, Device ID was replaced,
driver was installed, but the number of pipeline did not
change.
Further, with the comparison in the hex- editor of different bios from X1900 GT and X1900 XT/ XTX, was
found byte from the displacement of 0x7C: in all Radeon x1900 XT/ XTX it is
equal to 0x18, while in X1900 GT to – of 0x19.
Bios code from x1900 XTX:
Bios code from x1900 GT:
With the comparison Of bios from x1800 XT and
X1800 GTO was noted the analogous situation. Unfortunately, the change of this
byte in default Of x1900 GT to 18 did not lead to any
results.
But, after turning to conference with techPowerUp, we understood that they were on the right way.
One of the participants in this conference was modified the bios on the same principle. But it was explained that for the
successful unlock it will be necessary not only the correctly modified bios, but also the map with “correct” chip. “Correct
video card” are produced on the chip r580 PRO, and rest - in R580 LE/XL
with the hardware block. To us fell precisely the chip r580 LE/XL.
Obviously in order to accelerate the release Of
radeon x1900 GT, to the first parties of video card send
will get full functional unlockable chips. But the majority later card will be produced on the
processors r580 LE/ XL.
According to small statistics assembled on the same forum, all
unclocked video card have GB_PIPE_SELECT of the same as in X1900 XT/ XTX of –
3FE4, to look it is possible in the program ATI tool . In our case
GB_PIPE_SELECT it was:
Attention! After any manipulations in hex- editor
to correct the check sum bios it is necessary to open
it into RaBiT and then save it again, otherwise u can put your card in non working
state. And, as usual, in conclusion here the Bios
from Sapphire x1900 GT here.
Test platform
Processor AMD athlon 64 4000+ San diego stepping E4 (2400 MHz,
12 * 200 MHz, 1MB).
Motherboard sapphire pure crossFire advantage PC-A9RD580Adv
Catalyst 6.5, Direct 3d ver. 6.14.10.0399, OpenGL ver. 6.14.10.5819
Catalyst control center 6.5 ver. 1.2.2314.20337
Test applications:
3DMark05 (v1.2)
3DMark06 (v1.02)
Far Of cry (v1.4 of beta)
Quake 4 (v1.0.5.0 of beta 2)
F.E.A.R. (v1.01)
Half-Life2 lost coast
Call of duty 2 (v1.2)
Driver settings.
Catalyst 6.5
Antialiasing settings = off / aA6x
Anisotropic filtering = off / aF16x
High quality AF = off
Temporal AA = disabled
Adaptive antialiasing = disabled
Catalyst A.I. = Standard
MipMap detail level = high quality
Wait for vertical sync = always off
Geometry instancing = On
Support DXT texture format = On
Alternate pixel centers = off
Triple buffering = off
Force 24bit Z -buffer depth = off
3DMark05.
3DMark05
In the general test the difference of the performance Of radeon
x1900 GT and Radeon x1900 XTX composed ~ 14% in the resolution
of 1024x768 and ~18% in 1280x1024 regime. The advantage Of radeon x1900 GT relative to Radeon x1800
GTO composed ~ 27 % and ~ 32% in 1024x768 and 1280x1024
respectively.
x1900gt 3d mark separate tests
Radeon
x1900 XTX became the first, in this case where its advantage is rather composed from
the larger number of textural blocks and higher clock frequency. The delay of
x1900 GT from its elder brother in 1024x768 composed ~ 4,3%,
and in 1280x1024 it was more than twice of previous value and
corresponds to the percent difference in the frequency ~ 11,6%.
The advantage Of radeon x1900 GT relative to the Radeon x1800
GTO, composed ~29 and ~ 36% in 1024x768 and 1280x1024
respectively. In an obvious manner is shown triple larger quantity of
pixel shader processors.
The second test (Firefly forest) strongly loads the graphic
processors, since the scene has enormous quantity dynamically generatable
scene. But here the productivity Of x1900 GT relative to X1900
XTX is not proportional to the difference in the frequency - in 1024x768 the delay composed ~ 14,5%, but in 1280x1024
already ~20%.
The advantage Of radeon x1900 GT relative to Radeon Of x1800
GTO, composed ~23 and ~ 27% in1024x768 and 1280x1024
respectively. The difference in performance is less than in the first
test.
The third test (Canyon flight) is complex both from the
point of view mathematical and textural load:
with the creation of water surface are used the reflections, refractions and
deep fog , and the wall of the canyon, along with the airship
flies, they are generated with using sufficiently complex shader. The
advantage Of radeon x1900 XTX above the junior brother was formed as it have larger number of functional blocks and composed ~20 and ~ 22% in 1024x768 and 1280x1024 respectively.
The advantage Of radeon x1900 GT relative to Radeon x1800
GTO, composed ~29 and ~ 32% in 1024x768 and 1280x1024
respectively. The larger number of pixel shader processors again showed
influential advantage.
3DMark06
3DMark06
In the general test the difference of performance between the radeon
x1900 GT and the Radeon x1900 XTX is close to the proportions of
characteristics and composed ~ 19% in resolution 1024x768 and
~ 21% in the resolution of 1280x1024.
The advantage Of radeon x1900 GT relative to Radeon x1800
GTO, composed ~21 and ~ 25% in 1024x768 and 1280x1024
respectively.
In SM 2.0 tests the general delay Of radeon x1900 GT
from the elder model composed 25 and 27% in t1024x768 and
1280x1024 respectively. The advantage Of radeon x1900 GT relative to Radeon
x1800 GTO, composed ~24 and ~ 28% in 1024x768 and
1280x1024 respectively.
HDR/SM 3.0 tests are more complex from mathematical point
of view; therefore the performance dependence on the number of pixel shader
processors is more explicit. Radeon x1900 GT is slower than the elder brother by
~27 and ~ 28% in 1024x768 and 1280x1024 respectively. The
advantage Of radeon x1900 GT relative to Radeon x1800 GTO composed ~31 and
~ 34% in 1024x768 and 1280x1024 respectively.
Distribution on the separate tests
The first test (Return to proxycon) taken from
3DMark 05, was considerable change and are used more complex shader illumination,there are considerably more than luminous sources, the new algorithms
of shadows and texture with larger resolution. In contrast to the results of this
test into 3DMark 05, here the Radeon x1900 XTX has considerably larger advantage
over the Radeon x1900 GT. Superiority in the technical characteristics of graphic
processor and doubly larger memory capacity helps to reach the difference in
performance by ~28 and ~ 29% in 1024x768 and 1280x1024
respectively.
The advantage Of radeon x1900 GT relative to Radeon x1800
GTO, composed ~24 and ~ 28% in 1024x768 and 1280x1024
respectively, which even is less than in the same test of 3DMark 05, most
likely, is shown a deficiency in video of memory but one way or another,
advantage in the number of pixel shader processors still.
The second test (Firefly forest) is also taken from 3DMark 05 version , with additional luminous
source, geometric load practically did not change. The use of longer shader
and shadows complicated work to graphic processor. The
advantage Of radeon x1900 XTX composed ~23 and ~ 25% in 1024x768 and 1280x1024 respectively, which is also higher than in this test from
3DMark 05.
The advantage Of radeon x1900 GT relative to the Radeon x1800
GTO, composed ~26 and ~ 29% in 1024x768 and 1280x1024
respectively, which is approximately equal with the same test of 3DMark 05, with
the only difference that the complexity of tests is distinguished approximately
one and half times.
The third test (Canyon flight) was also taken from 3DMark 05, but it got even larger modification than the two
previous tests, now here the SM 3.0 is present with completely
popular technology HDR (High dynamic range), which makes possible to
make scene considerably more realistic. There were also considerably number of shader in the water surface and canyon walls, mathematical complexity approximately also grew . The advantage Of radeon x1900 XTX composed
~26 and ~ 28% in 1024x768 and 1280x1024 respectively, which
exactly is proportional to the difference of characteristics.
The advantage Of radeon x1900 GT relative to Radeon x1800
GTO, composed ~30 and ~ 34% in 1024x768 and 1280x1024
respectively, 36 pixel shader processors against 12 showed the good additional performance.
The fourth test (Deep freeze) completely new and was
developed from zero. At its basis, just as in the previous test - SM3.0 and HDR.
The use of qualitative soft shadows, which load well the graphic processor. Radeon x1900 XTX left forward to ~23 and ~ 25% in 1024x768 and 1280x1024 respectively.
The advantage Of radeon x1900 GT relative to Radeon x1800
GTO, composed ~25 and ~ 29% in 1024x768 and 1280x1024
respectively.
Far Of cry
FarCry
In the resolution of 1024x768 without FSAA performance is abutted
against the insufficient processor power . With the activation Of FSAA6x
radeon x1900 GT lags behind the elder brother with ~ 12%, advantage over
Radeon the x1800 GTO composed in all ~ 7%.
HDR Activation with Radeon x1900 XTX and X1900 GT is practically
equivalent to the start with FSAA6x, but performance is distinguished by
~2-3 FPS.
Radeon x1800 GTO considerably lags, without ven getting in the 60 FPS range.
The advantage Of radeon x1900 GT above it composed ~ 22%.
In resolution 1280x1024 the performance Of radeon
x1900 XTX is limited again by the processor, The Radeon x1800 GTO and
Radeon x1900 GT already surrender position. The delay Of radeon x1900 GT
from Radeon x1900 XTX composed ~ 11%, and with the activation Of FSAA6x
~ 22%. Without FSAA the advantage Of radeon x1900 GT above Radeon the
x1800 GTO is not considerable, but with the activation Of FSAA6x it
composed ~ 15%.
In this resolution together with HDR comfortably to play game is only
possible with Radeon x1900 XTX, advantage over Radeon x1900 GT composed
~25%. But Radeon x1900 GT shows the good effectiveness of its 36 pixel shader
processors, anticipating Radeon x1800 GTO by ~ 30%.
Quake 4
Quake 4
Radeon x1900 XTX and Radeon x1900 GT go practically in the same level,
only in resolution1280x1024 with active FSAA6x the latter
begins considerably to lag. In 1024x768 the delay between radeon
x1800 GTO from its elder is not very considerable, while in 1280x1024 relative to Radeon x1900 GT it composed ~ 24%, with
the activation Of FSAA6x ~ 15%, last, most likely, this indicates a deficiency in
the video memory in both maps.
FEAR
FEAR
In FEAR radeon x1900 XTX and Radeon x1900 GT they reveal
entire potential. Describing the architecture r580, we exactly spoke about the favor of the computational and textural
operations.
With the use of soft shadows (Soft shadow), but without the
activation of FSAA the delay Of radeon x1900 GT from elite video card composed
~ 30% in both resolutions. The advantage Of radeon x1900 GT relative to
Radeon x1800 GTO reached the maximum of - ~36 and ~ 40% in 1024x768 and 1280x960 respectively, but one way or another our hero did not
get the desired 60 FPS.
With soft shadows Off :to reduce load on the card, the advantage Of
radeon x1900 XTX was preserved approximately at the same level - ~ 29% in
both resolution. The difference in performance between Radeon x1800 GTO
and Radeon x1900 GT was considerably reduced - ~16 and ~ 23% in 1024x768 and 1280x960 respectively.
In the max quality regime (Soft shadow and FSAA4x) the
difference between Radeon x1900 XTX and Radeon x1900 GT practically did
not change – ~34 and ~ 31% in 1024x768 and 1280x960
respectively. The advantage Of radeon x1900 GT relative to Radeon x1800
GTO, composed ~27 and ~ 28% in 1024x768 and 1280x960
respectively.
Half-Life 2 Lost Of coast
Half-Life 2 Lost of coast
In the regime without HDR and without the activation FSAA the
performance Of radeon x1900 XTX was rested into the insufficiently powerful
processor in both resolution, Radeon x1900 GT in 1024x768
remained in all FPS (~ 3,5%), while in 1280x1024 it is already
~ 12%. The delay Of radeon x1800 GTO from Radeon x1900 GT composed ~7 and
~ 18% in 1024x768 and 1280x960 respectively.
With the activation Of FSAA6x in 1024x768 the performance Of radeon x1900 XTX and Radeon x1900 GT falls insignificantly
and it is distinguished in all on 2.3 FPS, and in the 1280x1024
the latter begins already influential lag – with ~ 19%. The advantage Of radeon
x1900 GT relative to Radeon x1800 GTO, composed ~10 and ~ 18% in 1024x768 and 1280x1024 respectively.
With the activation Of HDR radeon x1900 XTX leave other card . Without the activation of FSAA the advantage over Radeon the x1900 GT
composes ~12 and ~ 23% 1024x768 and 1280x1024
respectively. The difference between Radeon x1900 GT and Radeon x1800 GTO
~18 and ~ 27% in 1024x768
and 1280x1024 respectively.
With the activation Of FSAA6x the Radeon x1900 XTX
grows more, and relative to Radeon x1900 GT compose ~23 and ~ 33% in
1024x768 and 1280x1024 respectively. But here the advantage
Of radeon x1900 GT above the Radeon x1800 GTO is reduced -
~18 and ~ 21% in 1024x768 and 1280x1024 respectively. yes even 256 MB of
memory are clearly insufficient.
Call of Of duty 2.
Call Of duty 2
Again Radeon x1900 XTX leaves far behind low-end and middle-end models, but
we should note that the game uses about 400 MB of video memory to
stock textures. Therefore the performance Of radeon x1800 GTO and
Radeon x1900 GT is limited by the video memory volume , and the performance differ in all on 1-2 FPS. It is necessary to note that the game
sufficiently processor- dependant, and even results Of radeon x1900 XTX was limited to 40 FPS, but also in the very heavy duty regime advantage over the Radeon
x1900 GT composes practically 50%.
Conclusions.
As a whole, Radeon x1900 GT by the formula of
12 textural blocks (TMU) and 36 pixel shader processors it demonstrated the good
effectiveness of chip architecture r580, exceeding its junior
brother Radeon X1800 GTO on average from 20- to 30%, and lagging to 20-30% behind
Radeon x1900 XTX.
Everything is sufficiently predicted relative to Radeon
x1900 XTX and radeon x1900 GT: the performance of two modifications
on base Of r580 is ranked with respect to the characteristics – of 48
pixel shader processors against 36 and 16 textural blocks (TMU) against 12.
Besides this, in separate applications the differences in
frequencies and in the video memory.
Radeon x1900 GT vs Radeon x1800
GTO. At first look 20- 30% advantage somehow entirely lay with the triple large number of pixel shader processors and the higher
frequencies. Alas, we expected to see higher deference from the 300% higher units. If we study the results of tests, it is possible to focus attention
that the power of 36 pixel shader processors Of radeon x1900 GT and the 12 by textural blocks (TMU) with the dependant samples of
textures and with the memory capacity of 256 MB. with the insufficient memory capacity. The memory capacity is perceived in the heavy scene
with the high mathematical complexity (HDR, Soft shadow, etc), where 36
pixel shader processors, probably, could show more than effectiveness.
Theoretically, if we begin to operate all of 16 textural blocks
(TMU) and to add 256 additional MB. of video memory, then the results Of radeon
x1900 GT would be close to the results radeon x1900 XTX.
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