I have 2x256Mb DDR2 sticks in my Intel915G mobo, set to 533MHz. The FSB is clocked at 200MHz and the bus on the chip is 800MHz. I'm thinking of getting a new 1GB kit, probably mushkin DDR2, but we'll see; problem is that this board has minimal overclock options, setting the RAM's latency and some basic speed settings (266,333,400,533,667MHz) are all thats available. My current RAM wont post at 667, no surprise. But if I had RAM capable, such as the Mushkin, would this increase the FSB or the chip bus speed? (Presumably the 667MHz setting relates to EE P4 chips on a 1066 chip bus?) Or will I need an Asus/DFI/other motherboard? Any recommendations? While I'm here - I cant decide between a P4 6series or a quicker and slightly cheaper 5series. (I got a 530J already) The 2mb cache of the 6series seems to have little effect in all out performance, and I'm not overly bothered about 64-bit. Thanks all, j1mbo P4 LGA775 3.0GHz 2x256Mb DDR2 533MHz XFX 6800GT PCI-E

First, I don't think the 915 is compatible with DDR2 ram. I know the 925 is, but I could be wrong. Increasing the ram size is not going to increase your bus. You up the fsb via BIOS, and that board can do it. Your limitations may be your cpu. The 3.0 P4 Socket T is not that good for OCing. You can up the fsb by maybe 20 for a total of 220 which would render a clock speed of roughly 3.3. Look in the BIOS under the advanced tab and then under the jumperless settings. Find the A1 setting and disable it, this will open up your overclock options. Increase the fsb slightly and check for stability. As for the Intel 6 series, the 2MB of L2 cache is quite a performance boost, but it won't be all that noticable. If the price difference is nominal, why not? I'd personally get more Ram (1G of pc3200) as you intend, up the FSB and enjoy it a little longer. Last I checked, the socket T may go the way of the dog when the dual core procs come out. I sure hope not since I just got mine a little over three months ago. ASUS P5GD1 P-4 3.4 SOCKET 775 1G Corsaire PC400 ABIT RX600SE 256MB PCI-E

The 915G I have ONLY supports DDR2, since I have two sticks of 4200 in there already. Intel's BIOS does not have options for adjusting the FSB. Only the RAM timings and frequency in steps, as I mentioned. Dual Cores will be an excuse for me to buy some new kit :) cheers tho P4 LGA775 3.0GHz 2x256Mb DDR2 533MHz XFX 6800GT PCI-E

If the BIOS has no settings you can change, you will have to do it from within windows. Do a google search for CLOCKGEN. This program has been able to oc boards that don't have a bios setting. See if your mobo is listed and give it a try. There are specific instructions on how to load windows with the desired settings. Also, if your specific board is not listed, you can try one for a different intel board (sometimes the list isn't complete), but TRY it and do a bench test before you proceed to save it. ASUS P5GD1 P-4 3.4 SOCKET 775 1G Corsaire PC400 ABIT RX600SE 256MB PCI-E

Cheers for the help - confirmed that the 915 board I have really doesn't support overclocking at all on the FSB, does your asus have many options? Cos I'm considering getting a new board and chip bundle, aiming for 4GHz if possible. Not a big fan of software OC tbo, but thanks for suggesting another option. j1mbo P4 LGA775 3.0GHz 2x256Mb DDR2 533MHz XFX 6800GT PCI-E