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Old 08-18-2012, 10:16 PM   #1
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Default How important are L2 and L3 cache in a CPU?

I'm not even really sure what L2 & L3 cache are. All I know is it improves cpu performance.

I'll give an example for what I'm asking:

The AMD A8-3870k - A quad-core at 3.0Ghz, 4MB L2 cache and I couldn't find anything on the L3 cache.

The AMD FX-8120 Processor - A dual-core at 3.1Ghz, 8 MB L2 cache, and 8MB L3 cache

The Dual-core processor is $130 more than the quad-core CPU from the website that I saw it on. Is this due to the amount of L2 & L3 cache? Also, is it actually better than the quad-core? I'm pretty sure 100Mhz doesn't beat two additional cores, so that's why I'm assuming it's the amount of L2 & L3 cache.
Or, did the website just give a higher price for the worse CPU and make a ridiculous mistake?

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Old 08-19-2012, 05:33 PM   #2
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Default Re: How important are L2 and L3 cache in a CPU?

What web site is this on? The FX-8120 is an octa-core CPU.

FX-8350 @ 4.7 cooled by H80, 32GB Mushkin Enhanced Blackline 2133, Asus Sabertooth 990FX, 2x Radeon HD 7850 2GB in X-fire, 500GB Samsung 850 Evo, 4TB Seagate, 3TB WD Black, 2x 1TB WD RED in RAID 0
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Old 08-21-2012, 11:16 PM   #3
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Default Re: How important are L2 and L3 cache in a CPU?

Hate to admit it, but I'm the same. >.< I'm fully aware that L2 and L3 cache improve performance, especially when the amount of cache is high, but, to this day, I still don't know WHY. Might be worth simply searching on Wiki for "CPU" and jumping straight to the cache area, if there is one.
My rig's specifications can be found here:
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