Tom's Hardware > Forum > CPU & Components > CPUs > X2 4800+ (2.4GHz + 2Mb cache) vs X2 4800+ (2.5GHz + 1Mb)

X2 4800+ (2.4GHz + 2Mb cache) vs X2 4800+ (2.5GHz + 1Mb)

Forum CPU & Components : CPUs - X2 4800+ (2.4GHz + 2Mb cache) vs X2 4800+ (2.5GHz + 1Mb)

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Is a larger cache better than megahertz for virtual machine hosting?




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mrescher   04-28-2007 at 04:14:24 AM

Hi there,

I've just bought a machine that is going to host virtual machines (linux/Xen)

I specifically ordered an X2 4800+, 2.4GHz with 1Mb cache per core, but I've been shipped a newer model which is 100MHz faster but has only 512k per core.

It seems to me that for a machine solely running virtual machines a meg of L2 cache is going to make far more difference than 100Mhz. (eg. cache misses are going to be more frequent and costly)

Does anyone know anything or have some links to back this up or should I not bother complaining?

Cheers

McE

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nightscope   04-28-2007 at 04:19:53 AM
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Quote :

Hi there,

I've just bought a machine that is going to host virtual machines (linux/Xen)

I specifically ordered an X2 4800+, 2.4GHz with 1Mb cache per core, but I've been shipped a newer model which is 100MHz faster but has only 512k per core.

It seems to me that for a machine solely running virtual machines a meg of L2 cache is going to make far more difference than 100Mhz. (eg. cache misses are going to be more frequent and costly)

Does anyone know anything or have some links to back this up or should I not bother complaining?

Cheers

McE



Well it depends on a lot more than the amount of l2 cache for performance...but statistically speaking, 1 mb l2 cache more should have a better performance than 512 l2 cache and 100 more mhz. You can always overclock the processor if needed, which I wouldn't think is.

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