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To: Elmer who wrote (170114)	8/26/2002 5:04:38 PM
From: wanna_bmw	Respond to of 186894

Elmer, Re: "regarding the 2.8GHz P4 intro'd today, last week we were seeing reports of super linear scaling on x87 FPU applications and today we see 100% scaling on SPECint, yet SPECfp showed no such improvement?? Is it that SPECfp uses SSE2 so no x87 improvements would be seen? So far we have seen both Integer and FP improvements with this stepping." Some review sites have observed a doubling in the instruction TLB size on the new Pentium 4 stepping. This is enough to explain a 1-3% per clock performance improvement, depending on the application (Aces Hardware had a whole article on this). As for floating point, I don't expect that anything major has been done with the core. Rather, some small fixes that only improve performance on a limited set of applications were probably implemented. I noticed that in some reviews 3D Studio showed greater performance on the 2.5GHz/400MHz C1 stepping Pentium 4 than on the 2.53GHz/533MHz B0 stepping. Clearly, some improvements have been made, but it doesn't look like they can be seen across the board. wbmw