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Old 05-25-10, 03:51 PM   #35
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Default Re: Dual Fermi GTX 490

Originally Posted by nekrosoft13 View Post
in the original post I mentioned I got them from the same review site, bit-tech.

you are comparing numbers from two different sites. in your post one site claims 432, one other claims 274
So you do a little bit of math... I'm using a common denominator between configurations. You take the relative difference between a GTX 480 and GTX 260, then you do the same for the GTX 260 and 8800GTX. This way your comparing just the cards, and not the whole system. In the exact same system a GTX 480 draws 121W more than a GTX 260. (421 - 300)

An 8800GTX is drawing 18W more than a GTX 260 (432 - 414)

So subtract the 18W from 121 and you get about 100W.

The 8800GT is 173W less than the GTX 480. (421 - 248)

The 8800GTX is 81W more than an 8800GT in one test, and 65W in another.

So 173W - 81W = 92W

In both cases that puts the 8800GTX at well under 80W below the GTX 480. The reason why the numbers between bit-tech aren't going to be accurate is that the entire system that the cards are running in are completely different.

The GTX 480 was tested with:

Intel Core i7 Test System
•Intel Core i7-965 processor (3.2GHz: 133MHz x 24)

•Asus P6T V2 motherboard (Intel X58 Express with three PCI-Express 2.0 x16 slots)

•3x 2GB Corsair TR3X6G1333C9 memory modules (operating in dual channel at DDR3 1,600MHz 9-9-9-24-1T)

•Corsair X128 120GB SSD running v1 firmware

•Corsair HX1000W PSU

•Windows 7 Home Premium x64

•Antec Twelve Hundred Chassis

And the 8800GTX tested with:

Intel Core 2 Duo X6800 (operating at 2.93GHz - 11x266MHz); EVGA nForce 680i SLI motherboard (NVIDIA nForce 680i SLI); 2 x 1GB Corsair XMS2-6400C3 (operating in dual channel at DDR2-800 with 3-4-3-9-1T timings); Seagate Barracuda 7200.9 200GB SATA hard drive; OCZ GameXtreme 700W power supply unit; Windows XP Professional Service Pack 2; DirectX 9.0c; NVIDIA nForce 680i SLI standalone drivers version 9.35.

Either way using their numbers I'm still seeing 61W less than a GTX 480. That would mean that at even 200W above for SLI you'd be melting the connectors because that extra card would have to be making another 260W.
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