This good old PC

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As in the help file of Windows Vista there's an entry called: This good old PC <search for it>

My system is 28 month old and is not a highend model anymore.

We talk about a:

AMD 3800+, 4096 MB DDR1, X1950pro GPU

It is not new here, but Vista feels slugish on my machine. If I compaire it to my X64 edition it is a heavy loaded OS. The boottime is very good and the response is also good, nothing wrong, but I want to talk about games and other heavy (3D) apps.

UT2004 draws 112% performanceloss in Vista 32-bit compaired to Windows X64 with both the newest drivers and settings!

LOTR BFME II draws 89% performanceloss compaired to each other.

UT3 (a brandnew game) is not measured, but it is also heavy noticable.

My question is: Why is the 3D performanceloss so high on my system (Aero in count)? If I wander what a Core 2 Duo could do with Vista what can it do against X64!?

Can anybody tell me why Microsoft has chosen so giant jump in code. Windows driver foundation, Readyboost and al the new features. I've had never measured a performance gain when using them and searching a file is not faster as in X64. Is this due to breadcrumb search technology?

If I compaire the issue in 2001 against Windows 2000 and Windows XP. I know it as yesterday I whas at work and we've had a huge discussion in which whas better. At these days, everbody bows for XP and Vista can make it hardly (is my point of view).

I've tried Windows 2000 these days, but I notice the lack of instruction code support like SSE2 and 3 etc. It is not for these days and Windows XP waits the same destination of the eternety fields of data.

Can anybody tell me what the difference is between Windows XP 32-bit and Windows X64? I doesn't mean the actual difference, but the difference in support and the possibilities of scalability? Can anybody tell me the nasty differences under the hood?

What's your opinion about this issue?

Sincerely, Jimmy H.