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Tom's Hardware > Forum > Graphics & Displays > Graphics Cards > TWO 295 VS. THREE 285 - WHICH HAS MORE POWER?

TWO 295 VS. THREE 285 - WHICH HAS MORE POWER?

Forum Graphics & Displays : Graphics Cards TWO 295 VS. THREE 285 - WHICH HAS MORE POWER?

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Gentlemen, i was wondering which graphics solution had more THEORETICAL Graphics Processing power - TWO 295's or THREE 285's...

i checked on http://www.nvidia.com/HelpMeChoose/fx/HelpMeChoose.asp and did some basic calculations, and the combined power of these SLI solutions, in theory, are:-

2 X 295's 3 X 285's
Graphics Performance (X) 134 147
Standard Memory (GB) 3.5 3
Texture Fill Rate (Billion) 184.4 155.4
Max Mem. Bandwidth (GB) 447.6 477


Now, as the 295s have a 18% advantage in Texture Fill Rating, and the 285s have a 6% advantage in Max. Memory Bandwidth, i think the 295s win...

what do u guys think...?

------------------------------ Intel Pentium Dual Core E5300 2.6 Ghz @ OC 3.28 Ghz
ATI Radeon HD 4670
4GB/DDR2/PC2 6400
Asus G31M-S
Reply to seerwan
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3xGTX285s

The GTX295s don't scale as well.

Here is my rudimentary chart:

1 GTX285 = 1.5
2x GTX285 SLi = 2.7
3x GTX285 SLi = 3.66

1 GTX295 = 2.34
2x GTX295 = 3.64

1 GTX260 216core = 1.3
2x GTX260 216core SLi = 2.34


Message edited by Bluescreendeath on 06-24-2009 at 12:00:43 AM
------------------------------ i7 920, E5300
GTX260, HD4870, HD4830
Reply to Bluescreendeath

Most modern games are not limited by texture fill rate, but by Shading power and memory bandwidth.

------------------------------ Play Brutal Legend Phenom II X4 955 @3.6GHz | GIGABYTE GA-MA790X-DS4 | 4GB Mushkin DDR2 1066 | Plextor 760A | Lite-On BluRay | CF Gigabyte UD 5870x2 | WD 1TB Black| Corsair 950TX | APEVIA X-Dreamer Black | Win XP 64 & Win 7 Pro 64
Reply to megamanx00
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While theoretically the 2xGTX295 is superior, in practice the 3xGTX285 will destroy them in most scenarios due to poor SLi scaling.

Reply to B-Unit

You could also overclock 3 cards better than 4 dies put into 2 cards

Reply to paranoidmage

As B-unit said, 2 GTX285's are technically more powerful in terms of specs and cores and stuff like that, but current SLI technology interferes in some ways apparently.

-Blue Screen of Death, maybe I am wrong but i thought that a GTX295 was 2 GTX275s and not GTX260, maybe I am mistaken...

Reply to blackhawk1928

blackhawk1928 wrote :

As B-unit said, 2 GTX285's are technically more powerful in terms of specs and cores and stuff like that, but current SLI technology interferes in some ways apparently.

-Blue Screen of Death, maybe I am wrong but i thought that a GTX295 was 2 GTX275s and not GTX260, maybe I am mistaken...



Specs are similar to 2 GTX275s, but performance doesn't come anywhere close. The GTX295 is about equal to two GTX260 216s.

------------------------------ i7 920, E5300
GTX260, HD4870, HD4830
Reply to Bluescreendeath
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