what is the performance reduction -32bit old to 64 bit new?

By pisono ·
Folks, I have 2 new-builds:
i7 2600k on gigabyte h67 ud3 board and 2nd i5 2500k on a gigabyte p67 board w vidia gt440 gpu. Changed software to win 7 64bit from xp32 bit and ran passmark test on both. results lower on 64bit: For i7 64bit;1877, 32bit;2085. for i5 64 bit 1706, 32bit 1832. What gives?

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PassMark version

by Bruce Epper In reply to what is the performance r ...

If you are running the 32-bit version of PassMark in all cases, you will always get lower figures on the 64-bit systems. The comments above about comparing XP to Win7 also apply. If you want to see the performance difference between 32-bit and 64-bit operating systems, you need to keep the OS version constant, otherwise you are looking at all other differences as well. And for more accurate results, the tests should only be run on clean systems (only OS installed with latest SP/hotfixes and no optional software installed at all).

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64 bit IS slower

by sybaseguru In reply to what is the performance r ...

Unless you are going to hit the RAM limit (and very few normal desktop users do) then 64 bit is always going to be slower. Programs will be larger (and take longer to load), DLLs are larger etc. Once you need the memory - and databases in particular gain here as you can hold the whole lot in memory - then 64 bit wins hands down as you avoid thrashing the paging system.

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