core 2 duo e8400 3GHz
4GB DDR2-800 Ballistix
I fairly certain this failure to overclock began after I added the HD 4890. Before I could just adjust the FBS and have no problem. Now I can't get it to overclock in the slightest. It power down and restart at the bios screen if I don't have everything in the bios set to default. I'd really appreciated help with this dilemma. Thanks for your time.
Go through the guides. Then first thing you should do is go into the BIOS and change the System Memory Multiplier from AUTO to 2.00, 2.00B, or 2.00D - whichever you need to set the Memory Frequency to twice the FSB. Then when you increase the FSB, the memory clock will rise in step with it.
Warning - confusion factor between what the BIOS calls things and what CPUZ calls things. What the BIOS calls "memory frequency" is actually the memory clock. What CPUZ calls "memory frequency" is half the memory clock - DDR2 RAM, remember? It transfers two chuncks of data each bus cycle. What you want in CPUZ is a 1:1 FSB:RAM ratio.
After that, start alternately pushing up the FSB and core voltage.
Intel's recommended max voltage is 1.3625 volts. Keep your loaded core temps under 70 C.
You need to keep your ram close to 800mhz useing the dividers,, Also set Robust Graphics to Turbo/PCI Express Frequency to 102Mhz
Make sure ram is at the right voltage/try 100mhz at a time with the cpu until it's not stable and then bump the voltage up til it's stable..
Also how much do you undertstand about overclocking if i may ask..I have a Gigabyte P965 DS3 Rev3.3 board and i ran a e5200 overclocked to 3.9Ghz with a XFXHD4890 and had no issues.. i have the same board running a Xeon x3230 at 3.4Ghz and a HIS HD5850 .. I only like Corsair /Kingston/OCZ ram on Gigabyte boards myself and you can run 1066Mhz ram on the 800Mhz boards which will allow overclocking to 1066Mhz from 800Mhz or more but the ram is really just running stated speed.