Tuesday, November 18, 2008

Influence of L2 Cache Size on e7200

clipped from www.xbitlabs.com
The release of the first Wolfdale processor with only half the cache memory of the previous models made us curious about the influence of cache
To perform the test we made our Core 2 Duo E7200 work as a Core 2 Duo E8200, i.e. at a frequency of 2.66GHz with a 1333MHz FSB. It’s easy to realize: the default frequency multiplier of the Core 2 Duo E7200 is 9.5x and can be lowered to 7x. Overclocking the FSB from 266 to 333MHz is not a problem. The resulting CPU frequency is close to the default one
see no catastrophic performance hit
Games suffer the most, having a performance hit of 9-10%. The speed of archiving is considerably lower, too. The other applications are quite favorable to the Wolfdale with 3MB L2 cache, running at similar speed on both versions of the 45nm core. The average performance loss with the reduced-cache Wolfdale is about 5%.
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