Radeon HD 4870 In Crossfire at 4GHz

[Comment Bot]

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[cybtropic]

I've read all of your sli/tri sli (4ghz, etc) benchmarks of both the gtx280 and ati cards and I don't understand why you don't see any scaling. I have seen other reviews, one in particular, where the reviewer tests trisli gtx280 on 4.2 ghx system and gets amazing scaling. He gets around 38fps in crysis at 2560x1600 very high settings with 3xgtx280 cards compared to around 27 for sli and 15 for single card. But you don't see any scaling at all, and no scaling with ati cards. Whats up?

In your defense, other reviewers also see little or no scaling but most of those use 3ghz system and attribute this to cpu speed, but you are using 4ghz.

[bioduken]

Comparing the 3 ghz to 4 ghz and the scaling.

This would probably be the faster FSB and not the CPU. The CPU can handle a lot, but the FSB can't handle that much I/O I think. You need to OC (fast FSB) to get all the I/O power that you can get