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To: rsi_boy who wrote (19114)	11/14/2000 8:48:15 PM
From: ptanner	Respond to of 275872

t., re: How do they [P4 scaling] compare to Athlon scaling from 1.1 to 1.2? Well, since I crunched all the numbers at the time of the 760 release here are some summaries of Athlon 1.2/1.0 scaling factors. I aggregated all of the test results (inverted lower are better numbers) for each review site as follows: Anandtech - KT133 1.091 (CL2? PC133), AMD760 (PC2100) 1.100 AMD Benchmarks - KT133 (CL3 PC133) 1.102, AMD760 (PC2100) 1.114 Tom's Hardware - KT133 1.107, AMD760 (PC1600@1GHz and PC2100@1.2GHz) 1.132 I don't think I grabbed all the numbers at Tom's and seem to remember he used different DDR speeds. The "scaling efficiency" from 1.0 to 1.2 GHz seems to average 45-50% for PC133 and 50-55% for DDR. Individual benchmarks varied widely, however. It would be useful to have some more data points to see how the lines are curving - Durons for example were noted by Tom's maxing out with negligible gain in the highest (overclocked) speed ranges, apparently due to limited L2 cache. Tom's has a nice range of speeds for both Durons and TBirds but had only limited DDR data. -PT

To: rsi_boy who wrote (19114)	11/15/2000 3:44:45 AM
From: Petz	Read Replies (1) \| Respond to of 275872

rsi, on scaling of Athlon performance with clock speed, compared to scaling of P4 performance with clock speed, I was hoping that my post would encourage someone to dig up those DDR benchmarks. Comparing 1.0 and 1.2 GHz DDR2100 (266 FSB) platforms Yes, I am pretty sure that TBird/PC133 is no better. EDIT - I'm in the process of doing a detailed comparison and it appears that even KT133 with PC133 scales better with MHz than P4 with dual Rambus. Yowsers! Petz