32 versus 64 bit system performance differences

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Anyone got any ideas why a 32 bit system would run better on a 64 bit processor than a 64 bit system?

I've had the 64 bit version of XP installed on my new pc for about 3 weeks now and it's just felt sluggish and not as snappy as I'd expect given my pc specs. I bit the bullet last night and installed a 64 bit server version and it behaved as I would expect XP to, very snappy.

I then went all out and installed Vista business edition (from the action pack) and it was also very responsive. I was amazed to see that the 32 bit vista system performed a lot better than a 64 bit XP system.

I might try installing the 64 bit XP system again but this time the standard version that comes with the action pack. The version I used before was one that I had put together myself with SP2 and a lot of hotfixes integrated into the disc.

Anyone experienced anything similar?

 

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Could be poor chipset / mobo drivers for XP 64bit, it's well known for having poor driver support.

 

Thanks for the replies guys. The funny thing is that the x64 server version seemed to be more responsive than the x64 XP version, even directly after the install and without any other software installed.

I didn't know that x64 XP was less supported than the other versions.

I also installed the vista version and didn't realise that it was 32 bit.

 

Everyone's getting the hang of Vista for the time being.. I don't feel there should be any significant difference in performance for the current crop of applications ..

 

It's not really a problem of the applications, as there were none installed. They were just clean installs of the OSs.

The problem is that the 64 bit XP was rather sluggish whereas the 64 bit server version had better performance as well as the 32 bit vista version.

Esit: I might try installing Server 2008 just for laughs and see if it's any better.