Power, Heat and Noise

Power

Load Power

We tested power load on the computer with the EVGA e-GeForce 7800GTX OC in the same way as the other 7800s that we've reviewed, and we found that this card is the most power-hungry. This didn't come as a surprise to us, given that both its core and memory clocks are higher than any of the others. As you can see, clocked at 490MHz, we see a power usage of 280 W; and overclocked at 500MHz, 284 W. For reference, the power load while the system was idle was 145 W.

Heat

One thing that we noticed while testing the heat level of this card was how it stayed relatively cool to the touch. We've found that these 7800s can generate lots of heat after rigorous testing, enough to make them uncomfortable to handle. This card didn't seem to break a sweat, though. We think it's pretty safe to say that this 7800 will be able to handle hotter climates better than any of the others out right now, especially given the fact that heat damage is one of the things that EVGA's warranty covers for this card.

Load Temperature

We reached the same temperature while testing the cards at both the factory and manual overclock. At 79 degrees C, it runs cooler than both the 450MHz and 475MHz EVGA tests, as well as the 473MHz BFG test. MSI still holds its title as the coolest running card, despite EVGA's modified heat sinks.

Noise

The ability of the human ear to distinguish SPL differences is diminished between .5 and 1 dB, so it may or may not be possible to hear a difference between some of the cards that we've tested (depending on the person listening). Less noise is still preferred of course, even if the difference isn't incredibly clear. Let's see how the EVGA KO measures up.

Noise

As our noise graph clearly shows, the KO edition scores the win. With the lowest sound pressure level calculated in our lab, it seems that, while not impressively less noisy, the EVGA ACS3 cooling solution contributes less to the noise of the system than the reference HSF.

Test Setup and Performance Final Words
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  • rqle - Tuesday, August 9, 2005 - link

    I actually enjoy editors views on different issue, doesnt really bother me if it left or right or if i agree or disagree. It seems to make the website more of a discussion and community base site then a boring TECH newspapers. Same way i enjoy Anand blog, his views and how he sees things makes this site a whole lot friendlier . I'll admit, he does avoid certain 'heated' issue or doesnt want to be bother with them and i respect that. If plain tech info is all i want, i would be reading the manufacture website and graphs which get quite boring. Ill have to admit i do think the added heatsink(workable or not) and warranty does make it worth while. Probably going to end up disagreeing with Kyle, to me doesnt make him less of a person. I actually thinks it neat that he does express issue like this big or small.
  • RaistlinZ - Tuesday, August 9, 2005 - link

    How can you say buying this card is not in your best interest? For those that want BF2 it's a decent buy, and the performance speaks for itself.

    These would make a good choice if you plan on running in SLI since you're GUARANTEED that you'll get 490core/1300mem out of the box.
  • SpaceRanger - Tuesday, August 9, 2005 - link

    You're paying extra and NOT getting BF2... This card sells for 60 bucks more, and all you get is a metal box around an old heatsink design, and no BF2..
  • SpaceRanger - Tuesday, August 9, 2005 - link

    Ohh. Sorry.. unless you have an extra $112 to burn, get the KO BF2 bundle;..

    BF2 costs 112 bucks?? I doubt it..
  • DerekWilson - Tuesday, August 9, 2005 - link

    You forgot to count the premium they charge for the highest clock speed we've tested yet. Out of the box this is the fastest 7800 GTX we've seen. XFX has a card clocked similarly which we will be testing soon.

    The EVGA KO with BF2 is now listed as http://labs.anandtech.com/search.php?q=evga+7800">$599 on our pricing engine. The 450/1.2 clocked EVGA with BF2 comes in at $529 making the overclock a $70 cost. Of course $540 could get yout the KO without BF2 now which is only $40 more than the 450/1.2 EVGA.

    It's amazing how much prices can change in a day.

    Anyway, RAM sinks on the back and a heatsink on the back of the GPU really do seem to make a difference in our overclock tests even if the HSF solution isn't revolutionary as a whole. At least EVGA is doing something different. And as someone who is constantly swapping cards, the fact that the entire pcb is protected is quite an advantage.

    In the end it's up to the buyer. But our numbers show the performance advantages (both out of the box and in overclocking). Take it or leave it.
  • bob661 - Tuesday, August 9, 2005 - link

    quote:

    The EVGA KO with BF2 is now listed as $599 on our pricing engine.

    You can get it at Monarch for $560 and on ZZF for $579. So I don't understand the price issue here.
  • DerekWilson - Tuesday, August 9, 2005 - link

    you're looking at the wrong product ... you can't find the KO with BF2 for less than 600 ... if you want the KO without BF2 its available for as low as 540 ... Those are the prices at Monarch. ZipZoomFly is more expensive ... I don't know what's up with your price info, but make sure you are looking at the KO version.
  • SpaceRanger - Tuesday, August 9, 2005 - link

    http://www.hardocp.com/newsarchives.html?news=QXVn...">Link to HardOCP's calling out against EVGA.. It's down a bit in the news archive but its there.
  • SignalPST - Tuesday, August 9, 2005 - link

    Does the EVGA e-GeForce 7800GTX KO come with Dual-Link DVI ports?
  • DerekWilson - Tuesday, August 9, 2005 - link

    As we've said before, we haven't found a 7800 GTX card without a dual-link DVI chip.

    We'll keep you guys posted if we find one without this feature.

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