Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Pravin Kamdar who wrote (43467)	12/15/1998 5:50:00 PM
From: Ali Chen	Read Replies (1) \| Respond to of 1572942

<Katmai/500 63,3 Pentium II/500* 36,3> I think it's a typo. Must be 36 instead of 63. IMHO.

To: Pravin Kamdar who wrote (43467)	12/15/1998 5:50:00 PM
From: Scumbria	Respond to of 1572942

Pravin, Are the following results due to Katmai's FPU or due to KNI? KNI is specifically designed to accelerate matrix operations (like lighting and transformation calculations.) Scumbria

To: Pravin Kamdar who wrote (43467)	12/15/1998 7:25:00 PM
From: Petz	Read Replies (2) \| Respond to of 1572942

Pravin, re:Katmai "Lighting & Transformation" results. Regarding the numbers you quoted: Lighting & Transformation Katmai/500.....63.3 PentiumII/500 36.3 K6--2/400.......36.4 First, these MUST have been done with 3DNow enabled, otherwise the K6-2-400 would have been beaten easily by the PII-500. In fact, the Pentium II would normally beat an identically clocked K6-2 by about 30%, so this indicates that 3DNow increases performance by 63%. 36.3 = (500/400) * 1.30 * 36.4/(1+0.63) If 3DNow increases performance by 63%, I would expect KNI to be good for *at least* a 60% improvement over the Pentium II. (After all, KNI is "better" than 3DNow, maybe it should be 70%.) Actually, KNI was 74% faster than Pentium II, so maybe Katmai's FPU is, on average, 9% faster than Pentium II. (63.3 = 1.09 * 36.3 * 1.6). That's about what I'd expect if they managed to get single cycle throughput on the FPU multiplier -- but even that is half what the K7 can do. Petz