For certain Conroe processors owners their was an interese in the potential of the performance gain from 32-bit to 64-bit transition. As the majority of modern processors already supports 64-bit expansions, and the share of 64-bit programs will gradually increase.
Colleagues from site HKE PC have annoced some interesting facts from the document distributed by manufacturers, concerning the performance of Core 2 Duo in the 64-bit program environment. they Affirms, that transition from 32-bit platform on 64-bit using of Conroe processor will not lead to appreciable performance increase . experiments with early Conroe samples too confirm it - the gain is no more than several percent.
Processors with architecture NetBurst (Pentium 4, Pentium D) at transition from 32-bit platform to 64-bit showed a gain in speed up to 5-10 %. Processors AMD64 showed gain in the order of 2-3 %, and processors Conroe practically do not show change. In other words, they equally work in 32-bit as 64-bit system.
technology Macro-Ops Fusion used in Conroe processors is optimized for the 32-bit environment, and in 64-bit environment it is not so effective. Processors Pentium 4 in general can gain up to 10-15 % at transition to 64-bit .
By the way, on our data, processors AMD win from transition to a 64-bit platformmore than processors Pentium 4 and Pentium D .