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I dont understand this.<br />
AM2 CPUs are supposed to be newer and faster than 939 ones.<br />
How can it be that only few very expensive AM2 CPUs have 1024 L2 Cache,<br />
and dirt cheap San Diego socket 939 CPUs have it?<br />
Even my three year old Athlon XP has 512.<br />
<br />
What is the difference between 512 and 1024 L2 cache (performance wise)?
 

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S/939 is considered a dead socket..There really isn't much of a performence gain with AM2 right now but it is upgradeble...AMD is just getting rid of it's S/939 inventory, which is cool I'm like a kid in a candy store right now...
 

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Well it also has the DDR2 memory. But at this time it is not really any better than S/939..
 

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AM2 is AMD's first step into the world of DDR2. The architecture is mostly the same as 939, with the main changes in the memory controller to handle the DDR2. It's in essence not a 'performance enhancing' platform, but basically a safe step into the DDR2 world while keeping the proven architecture.<br />
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If you were to buy an AMD system right now, and don't plan upgrader, go for socket 939. If upgradability is a must, then go AM2. However, AM2 has heavy price competition from Core 2 Duo.<br />
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On the AM2 platform, there is not much difference between 512kb and 1MB or cache, and I believe that's the reason why AMD did not bother with 1MB cache at first. Later, they did release 1MB cache versions, which might be done because of demand.
 

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Originally Posted by <strong>CIAagent11</strong>

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<div style="font-style:italic">So you pay more for AM2, not because its faster, but because you will be able to run AM3 CPUs?</div>

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</div>You will be able to run the next generation CPUs (Altair quad core, Antares dual core).<br />
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Next gen will be out for AM2 and AM2+ first, and then follow by AM3 6-9 months later.<br />
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AM2 is DDR2 and HTT. <br />
<br />
AM2+ will be DDR2 and HTT 3.0. AM3 wil be DDR3 and HTT 3.0.<br />
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AM2 and AM2+ have the same exact mechanical and pin designs.<br />
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AM3 will be on different mechanical design.
 

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I had read somewhere that they are not creating as many 1MB or 2x1MB processors in an attempt to drive the sales of the FX and top tier A64 lines up because of people like me that want that extra L2Cache. I think they miscalculated this though, the extra L2Cache is worth a little more money but there is a huge price disparity in the AM2 line from the 512KB cpu's to 1MB cpu's. I bet their sales have not increased one bit on those upper tier line of processors.
 
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