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Technology Stocks : Advanced Micro Devices - Moderated (AMD) -- Ignore unavailable to you. Want to Upgrade?

To: eracer who wrote (195103)	4/26/2006 12:05:14 AM
From: pgerassi	Read Replies (2) \| Respond to of 275872

Dear Eracer: I beg to differ. Many users around here use multiple windows doing many things at the same time. Memory use and working set size are quite high (above 85MB average). If Conroe gets most of the benefit from 4MB L2 and has high latency memory and low BW there, Conroe will underperform A64 X2 at same clock when hit with these average users. You would be correct if most of your users simply have the CPU idle a majority of the time, but won't they be better served by a SC CPU as it will be cheaper and cooler in the long run. This however fails when Woodcrest is considered. Most servers are not idle for long periods. They do not just do mostly one task at any given time. Many of the ones here, especially the critical ones, have 5-10% idle time with 10-30 running processes simultaneously. The working set is about 160MB on average. Won't easily fit into just 4MB of L2 (or 8MB or 16MB). The primary bottleneck for these here will be the latency to memory and to a lesser extent, the BW. Here Woodcrest will fall down wrt Opteron. And the amount of the drop wrt Opteron will get worse as the socket count goes up. And I think that this will be far more typical of the workloads that server purchasers will use than yours. Pete