From what ive tested in similar machines they run pretty great with 3 or more Gigabytes. Vista 64x SP1 can be pretty stable and very fast if you have the right rig. If you have DDR2, well buy 2 more. they are cheap, and DDR2 boards aren't gonna vanish overnight. If you have DDR400, well, that is a different ballgame. Let me see if i can do it by memory (im working atm).
Run services.msc.
- Disable Superfetch (it will open a DOS CMD, close it and restart the PC)
- Disable UAC ( User Acess Control )
- Disable Windows Defender ( doesnt do nothing really, just to piss people off)
- Check the rest of the services to see if you can disable more crap. 71 processes with a clean install its ridiculous.
- There are more crap, i just don't remember right now, sorry.
Disabling Windows Vista Indexing (copy/paste , my work pc has XP) :
Run Services (just type Services at the Start Search bar), right click on the Windows Search service and select Properties. Then choose Disabled for the start type. Afterwards, you have to stop this service by right clicking on it and selecting Stop.
Personal note: Indexing service is always Indexing god-knows-what. Take it down fast !!!
Tinkering Virtual memory in Vista 64x
Ill paste a link, so you can take a peek how too. With 3GB of ram you can reduce it a lot to 512mb. Virtual memory is only good to page new process that CAN take ALOT of memory, but they don't. Imagine you run wow. Firstly Wow is assigned to the Virtual Memory has having a possible 2GB max paged, but in reality is taking only a 200mb of ram. With 3-4Gb most apps tend to skip this part increasing load/alt+tabbing times. You really notice the difference. The link i am going to paste tells you to increase it, but hey, tinker a bit, a check what is faster. If you have 3-4Gb take it down, if you have less, well, tinker a bit.
http://spiceminesofkessel.com/2007/11/26/tip-virtual-me...
I Hope i helped.
PS: After you disabled the crap out of Vista, and find out that reducing Virtual memory to a minimum really speeds up the PC, don't get scared, if hes eating 1GB or more with a clean install. It is normal.