Saturday, August 9th 2008
R700 Crossfire X Scaling Efficiency up to 104 %
Chinese hardware website ChipHell put up preliminary comparisons between the Radeon HD 4870 X2 and a Crossfire X setup using two of these cards to compare the scaling efficiency of these cards when paired in a Crossfire X setup. Readings were put up on a chart. The cards seem to scale up to 104% and in several tests the performance scaling stayed above 50%. The average performance increment a pair of these cards has over a single card is noted to be 66%, on launch drivers. It is general belief that entry-level and mid-range cards scale more efficiently than high-end cards. Scaling efficiency for these cards are high even with settings such as 4x AA, 8x AF enabled. The HD 4870 X2 is expected to be formally launched this Tuesday the 12th.
Sources:
ChipHell, GPU Café
53 Comments on R700 Crossfire X Scaling Efficiency up to 104 %
Some how, Crysis does do a lot better with Nvidia though. Wonder why is that??
COJ has always been an ATI game. Its one of the few games on which ATI worked with the developers and the result of which IS 2900xt performs better than 8800GTX .
what do you mean by shader power?
I think you meant processing power which is the number of constructions/flops a gpu can handle in a single clock.which can be calculated by the following formula:
number of cores x core frequency x number of cinstructions the core can handle is a single clock"cycle".
The 4870 has 800 x 750 x 2 =1200 Giga Flops/cycle
The 280gtx has 240 x 1300 x 3 = 933 Giga flops/cycle
So,the 4870 has more "shader power" than the 280gtx.
crysis fro nvida cards is like call of huarez for ATI cards.It''s optimezd to work better on gefoce cards.
That's one method.
My friend has another and it's very simple. I'll have to ask him again.