The GT300/Fermi Thread - Part 2!

[saaya]

I'm not so sure about that.

There are multiple constraints, and bandwidth is just one. #GPUs has to be >= #frames being rendered ahead. Hypothetically, if you had 100 GPUs running at 50fps, those 100 frames would be 2 sec of lag. And D3D and OpenGL have limitations on #chain/buffers.

There is also diminishing returns due to cost of partitioning work, and how uniform the work units are. Most games I play dont have exact same pixel/texture/vertex workload on all parts of the screen all the time.

Bottom line:
If you cant get anywhere near 50% let alone 100% scaling in many (not all) games with just 2 GPU, how do expect it to be possible for quad?

we were talking about gpgpu... the limitations for graphics are different... especially for sfr the system bus definately plays a big role, but for gpgpu each gpu works on independent tasks (i thought?)

I don't know, Charlie hates a lot, but his GTS 250 hoopla back at the inquirer from a while ago really was an 'aha' moment.

hmmm i must have missed that... what was it about?

This is what I would like to see ...

GTX480 Ultra 245W

GTX285	HD5870	GΤΧ480	%Faster	Game
65,7	83,8	109,72	30,93	Far Cry 2
115	111,2	192,05	72,71	Batman Arkham Asylum
85,5	88,4	142,79	61,52	Tom Clancy's H.A.W.X
88,5	89,3	147,8	65,5	Resident Evil 5
60,3	65,4	100,7	53,98	World in Conflict 
6376	7953	10649	33,89	3DMark Vantage Extreme GPU

why is a 285 as fast as a 5870 in this table? 0_o