Reply 300 of 508, by agent_x007
About L2 cache afaik its not per core its shared between all of them and E5400 has only 2 MB and Xeon 12 MB, its big difference.
Sharing between dies is slower than sharing internally though.
Core 2 Quads have two dies on the same package, while all Core 2 Duos have only one die.
That's why I wrote that Xeon has 2x6MB, and not 1x12MB.
Sure, a Core from one die can access L2 on the other one no problem, BUT FSB must be used for this (since there is no "Infinity Fabric" here). So, performance panalty is great if FSB is slow or if program needs to constantly exchange data between L2 caches.
Hi agent_x007, is there a specific reason why you mentioned the E5400? I just bought the 4CoreDual-SATA2 (it's rev. 1.02) and I […]
Hi agent_x007, is there a specific reason why you mentioned the E5400?
I just bought the 4CoreDual-SATA2 (it's rev. 1.02) and I had an E5400 lying around.
I have it running at 3.4 GHz (even though it's not on the R1.0 support list, maybe they forgot to update it?) and it seems to be Prime95 stable.
However, do you think an E5800 would be able to go to 4.0 GHz (250x16)? Or should I perhaps buy a Pentium E6700 or Core 2 Duo E7500?
I mentioned E5400 because it has high enough multi for general stability on higher FSB (1000MHz+).
I own a E5800 and no, you can't go past 3,5-3,7GHz on it without VID Moding it (Vcore drop is simply too great).
Pentium E6x00 = E5x00 in this case, since they are the same chips. However you do exchange mutlipliers (for worse, ie. lower ones) to get higher stock FSB (it's Very bad exchange for this boards).
E7500 is a nice CPU, IF you can max. FSB speed on it. Catch is, how much you gain from it really depends on how good your task scales with more cache (50% in this case).
I'd say go for E7500 if you have a crappy RAM or memory performance is bad in general.