GeForce 8800 Roundup: The Best of the Best
by Josh Venning on November 13, 2006 11:04 AM EST- Posted in
- GPUs
Power Consumption
Power consumption is something that is important to look at when evaluating a graphics card, and because these 8800s are such high performers, they create very high power levels as well.
We tested power consumption for these parts in the same way we usually do, by measuring the total power draw of the system with each of the cards installed in two different states. The first state is with the system idle (no other programs running) and the second is while the GPU is under stress testing. We use a few of the benchmarks from 3DMark06 to stress the GPUs to find out their power consumption under load. Because we are measuring the wattage of the entire system and not simply the cards, we can only get a general idea of the type of power levels of these cards.
Looking at the data, we immediately see that the Sparkle Calibre 8800 GTX is the highest on the graphs for its power consumption. This was expected because of its peltier cooler. Most of these cards got results that remained around 180 Watts while the system was idle, and 280 Watts while the system was under load. The XFX GeForce 8800 GTS naturally got the lowest levels of the bunch, which makes sense given that it's the lone GTS out of a roundup of primarily GTX cards. Out of the 8800 GTXs though, the ASUS EN8800 GTX seemed to draw the least amount of power under load, and the reference design Sparkle 8800 GTX pulled the least while idle.
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JarredWalton - Monday, November 13, 2006 - link
It appears Oblivion isn't fully able to use all the SPs at present. The stock 8800 GTX should still have about 17% more potential core performance, although maybe not? If the SPs run at 1.35 GHz, what runs at 575 MHz? Or in the case of the OC'ed GTS, at 654 MHz? It could be they have a similar number of ROPs or some other logic that somehow makes the core clock more important in some cases. Or it could just be that the drivers need more optimizations to make the GTX outperform the GTS in all games. Obviously Oblivion isn't GPU bandwidth limited; beyond that, more testing will need to be done.dcalfine - Monday, November 13, 2006 - link
What about the Liquid-cooled BFG 8800GTX?Any news on that? I'd be interested in seeing how it compared in speed, overclockablility, temperature and power consumption.
Keep up the good work though!
shamgar03 - Monday, November 13, 2006 - link
I ordered one, hopefully it will do well in the over clocking section. I am a bit concerned with the differences in over clocking the cards from different manufacturers. Does anyone know the cause of that? I mean if two cards are the exact same as the reference except for the sticker you have to wonder if there is a bit of a variance in quality of semiconductor production. Maybe favorite distributors get the better cores? Any thoughts on what causes these differences?yyrkoon - Monday, November 13, 2006 - link
I assume this text about the sparkle card is in refference to it's in-ability to overclock ? In my opinion, I would rather use this card, or another card that ran equaly (or better), and remained as cool (or cooler). I dont know about you guys, or anyone else, but the though of a Graphics card approaching 90C (@ load, barring the sparkle) scares the crap out of me, and if this is a sign of things to come, then I'm not sure what my future options are. Lets not forget about 300WATTS + under load . . .
Just as the heat / power consumption is an issue (once again, in my opinion), equally disturbing, is the brass it takes to charge $650 usd, for a first generation, card, that obviously needs alot of work. Yes, it would be nice to own such a card, for pumping out graphics better than anything previous, however, I personally would rather pay $650 for something that ran a lot cooler, and offered just as much performance, or better.
Now, to the guy talking about Vista RC2 drivers from nVidia . . . Do you really expect someone to keep up on drivers, for a "product" that is basicly doomed to die a quiet death ? "RC2" . . . Release candadite . . . as far as I'm aware, the last I checked, alot of the graphics features (of Vista) in these betas were not even implemented. This means, that quite possibly, the drivers between RC2, and release could be a good bit different. Personally, I'd rather have nVidia work on the finished product drivers, VS. the release candadite drivers any day of the week. Aside from yourself, I hardly think anyone cares if you want to run RC2 until May 2007 (legally).
Griswold - Thursday, November 23, 2006 - link
I fail to see your issue with temperatures. These cards were designed to run safely at these temperatures. Just because the figures are higher than you have come used to over the years, doesnt mean its bad.RMSistight - Monday, November 13, 2006 - link
How come the Quad SLI setup was not included on the tests? Quad SLI owners want to know.DigitalFreak - Monday, November 13, 2006 - link
LOL. You really want to see how bad a $1200 setup will get spanked by a single card that costs half as much? You must be a masochist.
penga - Monday, November 13, 2006 - link
Hey, iam always interested in the most exact wattage number a card uses and i find it hard to do the maths from the given total system power consumption and conclude how much only the card eats. So my idea was why not use a mainboard with integrated graphics card and compare the numbers? hope u get the idea. what u think, wouldnt that work?DerekWilson - Monday, November 13, 2006 - link
The only way to do this would be to place extremely low resistance (but high current) shunt resistors in the power lines AND build a PCIe riser card to measure the power supplied by the motherboard while the system is running at load.There isn't a really good way to report the power of just the card any other way -- using an onboard graphics card wouldn't do it because the rest of the system would be using a different ammount of power as well (different cards require the system to do different types of work -- a higher powered graphics card will cause the CPU, memory, and chipset to all work harder and draw more power than a lower performance card).
yyrkoon - Monday, November 13, 2006 - link
Derek, I think he was asking: "why not use an integrated graphics motherboard, as a refference system, for power consumption tests".However, it should be obvious, that this wouldnt be a good idea from a game benchmark perspective, in that, it's been my experience that integrated graphics mainboards dont normally perform as well, and often use dated technology / components. Although I havent really paid that much attention to detail, I would assume you guys use the "best" motherboard, for gaming benchmarks, and probably use the same mainboard for the rest of your tests.