Cant Overclock after upgrading to 4870 1GB

[JumpingJackson]

Running a Gigabyte 965P-DS3 rev 2.0, E6400 @ 3.20GHZ and previously a 8800GTS 640MB, recently upgraded to a 4870 1GB.
Initially it worked fine after installing the card then i was messing around with the card BIOS to turn up the fan settings but i downloaded the bios from the card using RBE (which wrote the original 128kb BIOS to a 64kb file clipping off the last 64kb of the bios corrupting it) I didnt know this at the time so i edited my fan settings and reflashed the card which bricked it. I rescued it by getting a good 128kb file with the same manufacutrer/model number and flashing the card with it. (Used a PCI video card). Now everything works fine but i noticed this morning on the POST screen that my CPU wasnt overclocked anymore but it doesnt give an error during bootup.

So i went into the BIOS and double checked the settings that i have been using for over a year and saved/rebooted and it wont let me overclock at all it just takes a little bit longer to POST and runs at the stock 2.13 GHZ. If i set the BIOS to optimized defaults it POST's right away and boots up.

Think this issue is related to me almost bricking my card or something else?

Update: Tried going back to my 8800GTS 640MB to see if i could overclock with it, no change. Ugh im so pissed because i have no idea whats causing it. Everything is back to the way it was. Using 400 FSB, 2:1 memory divider so the ram is running at stock 800 mhz speeds, even tried relaxing the timings on my super talent ram which spec'd to run 4:4:3:8 down to 5:5:5:15, played with the voltage.

 

[Pederv]

Have you tried flashing the BIOS of your motherboard?

 

[GrJohnso]

I'd start wit the reflash of the MB too.... Recently ran into similar issues with my Gigabyte MB after it having been powered off for a couple weeks while on vacation...

Second, what kind of power supply you running? The 4870 may be putting enough of an extra drain on your old power supply to cause some issues. Just a thought...

 

[faxon]

one thing you can do to check how much power your system is drawing if you dont want to go overkill or underkill on a power supply is buy yourself a kill-a-watt unit. they are like $15-20 and they tell you a bunch of useful information about the power going into your computer. just remember, measuring the watts at the wall doesnt = what your system is actually using. you need to guesstimate in the 70-90% efficiency range based on the current wattage being drawn at the wall, vs the maximum your PSU can provide to your system. wall current = AC, voltages in your comp = DC

 

[FalseChristian]

Try resetting the BIOS to defaults, restart and try it again. Keep the memory timings loose. I have and I'm up to 4GHz on my E8400. A videcard change isn't going to affect your CPU overclock. I went from 2 BFG GeForce 512MB 7950GTs to 2 Asus GeForce 512MB 8800GTS and my overclock has remained the same. Keep us updated, please.