Quick question about overclocking CPU

[imported_Couchpotato]

I bought an open box mb from Newegg recenlty to replace the same motherboard model. Alghought the 2nd board was an open box I had it a month and it overclocked stable at 3.4ghz at loads 56c which is pretty good.

Everything was going great until I purchased a Radeon 4870 512mb card to replace my old Geforce 7900gt. I uninstalled all the Nvidia drivers and installed the new card. Ugraded to the latest Catalyst drivers and booted up Windows. Once I got things settled I began to overclock again and wouldnt u know my cpu wouldn't get above 2.7ghz without locking up in the bios?

What gives is there any issues with the Catalyst drivers?

 

[Markfw]

If it locks up in bios, it has nothing to do with drivers. That would be after windows is loaded or trying to load.

 

[Arkaign]

Sounds like the 4870 is using power much differently than your old 7900. You could try gingerly adjusting voltages in bios.

 

[imported_Couchpotato]

Well it can't be a heat issue my cpus temps remain roughly the same, thought the card produces a lot of heat.

 

[imported_Couchpotato]

I solved the problem. Seems that the new GSKill ram I ordered off Newegg had different cas latency (6) and different timings. I removed that and used two 1 gb sticks and one 2 gb stick of ram I already had for a total of 4gb. All four are identical in specs and I was able to overclock back up to 3.4ghz again.

Thanks for your help.