Well I recently bought and built a new system last week. Here is the thread discussing the details.
Here is a quick summary of my setup:
Biostar Tforce 965PT motherboard
1 x 1GB Gskill DDR2 800MHz 5-5-5-15 RAM 1.8-2.0 volts(will dual channel in a few weeks)
Coolermaster Centurion 5 case
Seagate 7200.10 250GB
My initial goal was a modest overclock for this rig. This is my first time OCing, but I am an Electrical Engineer and have caught on fairly quickly I feel.
My RAM is Gskill 5-5-5-15 at 800 MHz, so I figured that my max FSB potential would be around 400 MHz, but I would be quite content with 350-360 for a 2.5 GHz CPU result. I changed the RAM mulitplier to 1:1 (533 MHz setting in the Biostar BIOS) and started the process as described in the Core 2 Duo OC sticky.
So, I can get the system to POST and boot into Windows at around 350 no problem, but stability is hosed even with bumping the Vcore up to 1.5 and Vfsb around +0.2 and Vmch +0.15. I was setting the RAM in this case at 2.0 volts (the max the memory is rated for). I can get through 12 or so hours of Prime95 no problem at FSB = 315 MHz with Vcore = 1.37 and default Vfsb and Vmch and 2.0 volts RAM.
Also, when I jump even closer to 370 FSB, the BIOS is giving the two long beeps, which means a DRAM issue This despite the fact that I have set the RAM multi to 1:1 (meaning RAM at 740 MHz) and my RAM is DDR2 800MHz.
Any insights guys? Should I just be content with an 18% improvement with this setup? Thanks in advance.
just set manually your RAM timings to 5-5-5-15. set PCI-E to 100 mhz and PCI to 33 mhz, then you should only take care of ram frecuency, Vcore, and temps, i got my E6600 1.2V 3000 Mhz with the stock cooler and all was ok, with other cooler and more Vcore i can go further.
so do it and check your tems under full load with CoreTemp and stress it with TAT(Thermal Analissi Tool) from intel
PD: I´m Electronics Engineer in project xDD
Wow, I followed dermotti's advice about the fsb "dead zone" and just said screw it and oc'd to 400 FSB at 1.375 Vcore, Vfsb +0.1 and V(g)mch +0.1 and it worked. It's stable after almost 9 hours running Orthos Blend and full load temp hovers between 38-42C. Weird but I am pleased especially after I thought I did everything exactly as everyone specifies.
mayouuu, I am not too familar with project xDD, my experience is mainly in embedded systems design with 8 and 16 bit microprocessors.