First off let me say thanks to everyone who has replied informatively to many of the threads in this forum (Vehementi especially). I finally got some spare time thanks to the Christmas holiday period & decided it was time I got around to tweaking & overclocking my system. So after reading quite a lot of posts on this forum I now have my XP2500+ running at 400mhz FBUS (as in XP3200+ speed) which is nice & am experimenting with overclocking my Radeon 9600 non-pro (once the X800's drop in price a bit I'll probably purchase one of them but it'll do for now). For anyone that is interested my CPU temp used to sit around 34/35°C and hit 39/40°C when under stress now it idles at 38/39°C and sits between 40-42°C when I stress it (I have 2 case fans on the front of my case for intake & 2 on the back blowing out, system temp sits around 28°C unless I take the side off the case). Those values are without CPUIdle Extreme running. Now for the questions. My CPU-Z report is here -> http://homepage.ntlworld.com/dj_sanders/cpuz.html Motherboard is a DFI NF2 Ultra Infinity & my CPU cooler is an Coolermaster Aero7 Lite which I have on full speed all the time as it doesn't make enough noise to bother me. 1) Should I lower the memory timings if at all possible for better performance? I currently have them set on Aggressive & SPD in the BIOS but should I manually set the timings instead? I will be purchasing another 512MB of the same manufacturer & model in the next month so I can use the dual channel interface which I am led to believe gives higher performance. 2) I currently have the AGP aperture set to 128 on the recommendation of this article as it is has 128MB onboard RAM. Should I leave it as is or would it be better to change it to a higher or lower value? 3) What drivers do people recommend for nForce2 chipsets? I installed ones I found on the DFI website after updating my BIOS which have the version number 5.10 (they're linked on the drivers page from the motherboard specs page I pasted above) however the NVidia site only has version 4.27 drivers available. I'll probably have some questions about BIOS settings later once I restart & grab a pen & paper but for now thanks for reading.  forgot to mention CPUIdle Extreme really is the business. I use my machine for gaming & coding/compiling and its great for chopping a few degrees off the CPU temp when I'm not doing anything intensive. I use it in S1 mode as C2 isn't supported but I've not tried OS yet.