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

To: Joe NYC who wrote (202405)	6/15/2006 9:36:37 PM
From: pgerassi	Read Replies (1) \| Respond to of 275872

Dear Joe: Sorry it does matter. Sun's best Opteron time in SPECfp2000 is with 2 cores enabled because they have and auto parallization option. What this does is use a 2nd core to run some independent FP calculations and/or doing one pass with the first core and the second pass with the second core. This seems to increase scores overall by 20-30%. It also helps that the second and higher cores can remove all OS load from the first core. Intel could be doing something similar to Sun in SPECint as well. I suspect that most of this is due to caches with a good deal of the rest on bandwidth. This is pointed by the much lower performance of SPECint2000_rate compared to SPECint2000. SPEC CPU 2006 will increase size of the working set, the size of the data set and likely say that systems with 4GB will be able to run SPEC CPU 2006. Another thing is that they will likely allow the use of optimized math libraries in accordance with current standard industry practice. This will destroy most of the cheats found effective against SPEC CPU 2000. Socket F (1207) will double Opteron's available bandwidth per socket. There are good indications that this helps with all four benchmarks (int, int_rate, fp and fp_rate). Higher clocks are likely as well. Pete