Originally posted by: sgrinavi
Originally posted by: apoppin
[- and have you tested it out? How well does it scale? Will it also throttle down to the slower of the two cards as AMD cards do?
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I was under the impression that the ATI cards defaulted to the smaller amount of memory, but did not 'throttle down' i.e a 4870 1gb crossfired with a 4850 512mb would perform better than the single 4870, but would be limited to 512mb of gddrX. no?
technically it is not a throttle down
it is a
lack of performance compared to running two identical cards - whether it be limited by a smaller shared framebuffer, a slower core speed, a small memory interface or perhaps slower vRAM. All of these things may impact performance and will have the same "effect" as throttling back performance - compared to the ideal
my bad with my choice of words
i am done with part one of my 5 GPU comparison .. of the 3, the GTX280 is a very fine choice. i am about to explore CrossfireX-3 on a p35 MB to see if performance is *choked* by the PCIe 1.0 and 4x PCIe for the 2nd GPU - the 4870 which will be running in tandem with my 4870-x2.
hen i rebuild my PC with x48 and get to do it all over again; this time i will try for my max e8600 OC .. so far, just for a test, i booted into Vista and ran programs with it at 450x100 = 4.5Ghz
- there is hope my e8600 will not be a bottleneck