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

To: Monica Detwiler who wrote (72494)	9/21/1999 12:33:00 AM
From: Dan3	Respond to of 1573088

Re: The Level 2 Cache then runs at FULL processor speed... We'll have to see what the independent benchmarkers find out. Remember that the improvement due to larger caches drops off fairly quickly as the size goes up. There is a brief delay before data comes from the level 2 cache - even when run at full speed. Take a look at: cpusite.examedia.nl There is a good discussion of cache issues here. Take a look at Figure 1 which shows a comparison of the effects of level one cache and level 2 cache. Keep in mind that Athlon has a level one cache 4 times the size of Coppermines, but also remember that this level 2 cache is not full speed. 128K level 1 vs 256K level 2 may be pretty much of a wash, but since the pentium core way lacking this before, it will help the relative performance of the chip compared to Athlon. It's unlikely that it will be enough to compensate for Coppermine's fewer pipelines and more limited scheduling capabilities, but we will soon find out. Dan