Posted:2006-09-05 By video card review Number of View:13113
HIS RADEON X1900 GT ICEQ3 REVIEW
VS 7900GT OVERCLOCK PERFORMANCE
AND BENCHMARK
By :video card review
Posted:2006-09-05
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the GeForce 7900 gt have comparable performance with GeForce 7800
GTX and suggested with the price arround 300euro.It is true that the G71 is a particularly profitable
chip made in 90 Nm . NVIDIA was
able to reduce the number of transistors for their new card so they run cool and require less power… so
ATI answers the GeForce 7900 gt with Radeon X1900 gt, kind of
Radeon X1900 XT. We opposed the HIS Radeon X1900 gt IceQ3 to GeForce 7900 gt in
order to check if the response of ATI was strong enough…
7900 gt spec overview
GeForce 7900 gt is based on the known G71 derived from the year ago launched G70 . GeForce 7800 gt is made in 90 Nm against 110
Nm for the 7800 serie, which leads to a size of 196 mm ² instead of 332 mm ² for its predecessor.
NVIDIA was succeeded to save 7.5% in the transistors ammunt: “only 278 million against
302 million but with identical performances at equal frequency. working at 450 MHz, the G71 of GeForce 7900 gt is 30 MHz faster than G70 of GeForce
7800 GTX. Last detail,
GeForce 7900 gt is satisfied with a relatively simple PCB and HSF in other word the most
economic.
ATi radeon x1900gt
Nvidia Geforce 7900gt
Chip
R580
G71
tech Process
110nm
90nm
Num of Transistors
384 milions
284 milions
Surface
351 mm
196 mm
Gpu Frequency
675 Mhz
450 MHz
Memory Frequency
600 MHz
660 MHz
Memory Bus
256 Bits
256 Bits
Vertex engine
8
8
Pixel Pipeline
36
24
Texturing Units
12
24
Rops
12
16
Fillrate
20700 mp/s
10800 mp/s
Geometry
1150 mv/s
936 mv/s
Memory Brandwith
38 GIG/s
41 GIG/s
x1900 gt spec overview
To produce Radeon X1900 GT, ATI applies the same receipt as for Radeon X 1800
GTO. The chip used here is R580 which preserves its 8 vertexes units but loosing a part of its pipelines . In practice, R580 takes
¼ here and preserves: 36 pixel shader pipelines, 12
texturing units and 12 ROP' S. Radeon X1900 GT is fortunately not too much attached on the level of frequency and the VPU is work at 575 MHz, which give him a frankly high geometrical power compared to its fillrate. X1900 GT has 256 MB memory working at 600 MHz with 256
bits memory bus. Unfortunately for ATI, R580 remains a large chip and it
occupies 351 mm ² for its 384 million transistors. However, by taking the
¾ pixel pipelines, Radeon X1900 gt makes possible to ATI to run out R580 chip which do not pass successfully the qualification tests for the models X1900 XT and X1900 XTX. Moreover, its PCB is comparable with the thigh-end-range
models .
in a word we had pretty simlar card .Nvidia use the 7900gt to produce video card witch are not capable to run at the 7900gtx speed : the 7900 gt run with 1.2 volt at 450 MHz the GTX at 1.35-.1.4v at 650 MHz so if the test show that the G71 chip could not run with 1.35 v at 650 MHz the card will becaume a 7900gt .the same do ati with their x1900gt but radeon here desable some pipeline before.this is only the theorical overview but in real life marketing have more effect .in some case where there is large demond
for ex 7900 gt some manuficulter could sell the gtx gpu as gt and here overclocker come with nice result :-)
HIS Radeon X1900 gt IceQ3
The IceQ
models of HIS is equipped with quiet system cooling made by Arctic
Cooling. This last have already stopped marking the ATI Silencer,so the model
assembled on the Radeon X1900 gt is specific to HIS. It uses copper
radiators fixed by screws , this was not very practical to dismount! The
radiator of the GPU is also made from copper . . The completion of the cooling system from HIS is exemplary, just for those who like silent
operation.
Under this cooler, we finds a good
large R580 with extremely large ammount of thermal paste and chips Samsung
K4J55323QG-BC14 certified for 700 MHz. These chips are GDDR3 so we can predict a beautiful overclocking margin .
The bundle delivered by HIS is composed of two DVI adapters
- > VGA, adapter HDTV, an adapter with video in/out S-VHS and finally a Molex adapter . HIS also delivers nice game (Flat out) and Power DVD 6.0 as well as a CD-ROM with the
driver and a second with utilities .
Taking into account the cooling system , asking the price of 330 € does not seem excessive…
Configuration of test
Sapphire A9RD580Adv and Asus A8N-SLI Premium
AMD Athlon 64 X2 4200+
2 X 512 MB DDR400 2226
HIS Radeon X1900 gt and NVIDIA GeForce 7900 gt
Maxtor DiamondMax More 9.120Go SATA-150
ViewSonic
VP171s
Software
Windows XP Pro + SP2
ForceWare 91.33 and Catalyst 6.6
Futuremark 3D Mark 2005
Futuremark 3D Mark 2006
Futuremark PC Mark 2006
Riddick EFBB 1280 X 1024 HQ SM2
FarCry 1280 X 1024 UQ
Doom III 1280 X 1024 HQ
TrackMania Sunrise 1280x1024 HQ
Serious Sam 2 1280x1024 HQ
Splinter Concealment CT 1280x1024 HQ SM3
F.E.A.R. 1280x1024 HQ
3dmark 2005 score
3dmark 2006 score
Gaming benchmark no AA or AF
First benchmark charts was done using the 1280x1024 resoltuion but without AA and AF
Gaming benchmark with AA and AF
Second benchmark charts was done using the 1280x1024 resoltuion but with 4AA and 8AF
On the performance level, it is a disappointment from the x1900Gt. if th
Radeon X1800 GTO ca complete in comparison with
GeForce 7600 gt, those Radeon X1900 gt are clearly lower then their compititor. In fact, the only test 3D Mark 2005 where X1900
gt is higher than GeForce 7600 gt. and It is completely normal taking into account
the consequent geometrical power of this Radeon .
the assessment seems more balanced with the 3D Mark 2006, the game plays show a quite
different reality. Thus, Radeon X1900 gt shows on average 13% slower in the
1280 X 1024 than the GeForce 7900 gt. During the activation of filters AA
(4x) and AF (8x), the performance still in favor of the GeForce 7900 gt and reached
15%. F.E.A.R. was excluded in this resolution the “software shadows” were
not activated with Radeon X1900 gt.
In the best cases,
Radeon X1900 gt is negotiated with 276 € against 280 € for GeForce 7900 gt.
considering that this Radeon X1900 WP IceQ3 is proposed for 330 €
and GeForce 7900 gt can be equipped with a quiet cooling such as VF-700 (25€) the overall will reach
305 €, the price ratio/performances still in favor of NVIDIA solution …
Overclocking and noise level
Overclocking question, all GeForce
7900 GT passed between our hands had: ~20% of profit for
the GPU and ~20% for the memory an increase of more than 17% in the 3D Mark
2005.
Radeon X1900 gt IceQ3 from HIS did not do better. The GPU passes from 575 MHz to 607 MHz (+5.5%) while
the memory goes up from 600 MHz to 729 MHz (+21.5%) with a profit of 5.5% to the
3D Mark 2005.
the overclocking plays in
favor of the GeForce 7900 GT … Damage for this HIS version , its specific cooling let to us hope better than this average. With
only 36 dB (A), the HIS Radeon X1900 GT IceQ3 on the other hand gains
with respect to any GeForce 7900 GT which easily go more than 43 dB
(A).
Conclusion
With its ranges of GeForce 7x00 GT, NVIDIA put ATI in not very pleasant position
. THe Radeon X1900 GT is inclined by more than 13% compared to its
direct competitor. The tariffs and especially the overclocking capability
also play big role. Overclocking borth card will give the 7900GT The total lead with over than 30% performance .
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