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Intel core 2 Duo e6550 review and overclocking
Posted:2007-08-03 By cpu review
Number of View:193579



By :cpu review


xtreview is your : Video card - cpu - memory - Hard drive - power supply unit source

Intel core 2 Duo e6550 review and overclocking


Intel processors with micro-architecture core use already the system bus 333 (1333) MHz. The scales of new system bus frequency is completely regular and overclocker already reached the frequencies 400 (1600) and 500 (2000) MHz FSB . The minimum multiplier of this new processors remain as previous x7, i.e., So to overclock the new low-end intel processors core 2 Duo e6550 will not be a bit simpler than previous e6300 or E6320.

For those who usually overclock their processor, there is not significant advantages from passage with FSB 333 MHz from 266 MHz , test proved that at equal frequency the performance between the two processor (266 MHz) and (333Mhz) is in the best case 1-2%. The only positive side with the new 333 MHZ processor are : increase in the specific performance, higher processors frequency with 4 MB cache volume in the second level and finally ALL this is proposed on the previous prices.

Let us also note that new processors energy consumption in the rest state was reduced to 8 W : this noticeable in comparison with 12 W in the previous core revisions (30% saving) , but if we recall that the first processors core consumed 22 W, then the new level is simply amazing. However, as main change for us should be recognized the improvement in the overclocking potential. Overclock to 3.6, to 4 GHz and even higher are submitted daily with new processor , the new revisions noticeably improved the overclock result using air cooling even without increase in the default vcore, moreover this improvement is not only for dual core, but also for four core processors .

To check the overclocking capability , we took three processor intel core 2 Duo e6550. They all work on the system bus 333 MHz, their default frequency is 2.33 GHz, they have 4 MB cache in the second level, ALL those processor are assembled in Malaysia and has the marking SLA9X.

intel core 2 Duo e6550 specifications
intel core 2 Duo e6550 specifications
intel core 2 Duo e6550 specifications

Processors related to one party, but their series numbers differed (by several thousand).

Here is the hardware component used for this test:

  • Motherboard : abit IP35 pro v1.00, BIOS 1.0;
  • Processor : intel core 2 Duo e6550 (2.33 GHz, FSB 333 MHz, 4 MB., Conroe, rev. G0);
  • Memory : 2x1024 MB corsair dominator TWIN2X2048-9136C5D;
  • Video card : NVIDIA geForce 8800 GTS 320 MB.;
  • Hard disk : seagate barracuda 7200.10, ST3320620AS, 7200 RP/min, 16 MB., SATA of 320 GB;
  • Cooling system : zalman CNPS9700 LED;
  • Power unit : OCZ gameXStream GXS700 (700 W).

intel core 2 Duo e6550 : CPUZ default

Overstating the default processor frequency is a characteristic property of abit motherboard , this time the processor was working at 47 MHZ Higher than its default ; however, the processor with similar setting functioned without any problems, Here is the motherboard at the idle time (the processor voltage and frequency are decreased) .

intel core 2 Duo e6550 : idle time

CPU- Z Utility erroneously reflects the current voltage. The widely known program core-Temp not only cannot show the correct temperature, but also make mistakes in the frequencies, and even in the processor name .

intel core 2 Duo e6550 : core temp

Speed-Fan don\'t show any additional information , the only available value is the hard disk temperature !!!!.

intel core 2 Duo e6550 : speed fan

It was necessary then to install the abit utility ( µGuru version ). This utility correctly tracked the change in temperatures and voltage.

Abit uguru untility

ABIT iGURU utility

The default voltage in all tested processors is 1.35 v : this is greater than earlier value encountered with older CPU models and also maximum for this processor.

Let us directly pass to the overclock results , the first tested processors without increase in vcore proved to be completely stable and operational at the FSB frequency equal to 480 MHz!

intel core 2 Duo e6550 : fsb 480 -- 3359mhz

intel core 2 Duo e6550 : 480 fsb stable OCCT

As comparison : the processor intel core 2 Duo e6300, which we usually utilized for motherboard test , was capable to overclock up to 490 MHz, but with increase in the vcore to 1.45 v!

Overclock to 3.36 GHz with the default vcore is pretty good result; however, Since the FSB was already high , we should not except a lot higher frequency from this processor due to : FSB wall, motherboard or memory possibility . :-(

With FSB 520 MHz the system refuse to boot even with lowered to the minimum (x6) multiplier , with 510 MHz we was able to reach windows but only several seconds after a freeze , then at 505 MHz it was possible to run this processor stability .

intel core 2 Duo e6550 : 505 fsb stable

For achieving this result it was necessary to increase the processor vcore from the default 1.35 to 1.45 v, Voltage on the north bridge was also increased from 1.25 to 1.52 v, the CPU VTT was increased from 1.2 to 1.31 v. the temperature during the half-hour checking using OCCT program ( according to abit µGuru utility ) was only 45c.

Let us pass to the second processor , we immediately started our test with default CPU vcore and FSB frequency set to 490 MHz. But Here .... !!! The system refused to boot at this frequency and also at 480 , 470 , 460 MHz. So we decreased the multiplier to x6, and the disappointment was that the system refused to boot up at the FSB frequency 450 MHz. This is an example of low FSB Wall value . With 440 MHz FSB the processor was capable to load Windows, but it was not stable in tests, The stability was possible only with 430 MHz. frequency

intel core 2 Duo e6550 : 430 fsb stable

Possibly, This processor could work at the FSB frequency 435 MHz, but we have not checked for stability with such setting.

Last processor proved to be just a little better than the second. It can boot up with 460 MHz frequency but no more , tests can not passe at 455 MHz frequency , The max stable FSB frequency was 450 MHz and also here without increase In vcore.

intel core 2 Duo e6550 : 450 fsb stable


The results proved that the processors intel core 2 Duo e6550 is not only impressive, but also discouraging. The new G0 stepping actually demonstrate excellent overclock capabilities . From other side, let us note that overclock is just like a lottery u can get a good or bad processor .

At the same time we should recognize that the processors intel core 2 Duo e6550 as their predecessors intel core 2 Duo e6300 and E6320, are imperfect selection for overclock. Due to the low default multiplier ( x7 ) witch completely limit their overclocking potential. Overclocker should look for the processors intel core 2 Duo e6750 with x8 multiplier (2.66 GHz). But what if their FSB wall will prove to be limited by the frequency 400 MHz????.....

The price of the following model : intel core 2 Duo e6850 (3.0 GHz) will be compared with the cost of low-end four core processor core 2 Quad q6600 (2.4 GHz) ..

As far as economical overclockers, which prefer to not expend on the processor considerably more than $100. The choice is limited to the processors intel core 2 Duo e4500 (2.2 GHz) and e4400 (2.0 GHz), working with 200 (800) MHz system bus and based on the new stepping M0 : this the reduced to (2 MB cache) version. Such processor has high multiplier x10 and x11 witch allow to ovoid problem with motherboard , memory and FSB wall Limits .

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Intel core 2 Duo e6550 review and overclocking

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