TWIN2X2048-8500C5D wont post

[Dangerman]

Hello Everyone,

 

I've had my current PC of a couple of years now and from day one set it up with a mild overclock.

 

Pushed the system clock from 266 up to 333MHz taking my E6600 from 2.4 to 3.0 GHz. I use the 667 ram setting to get a 4:5 divider and have had the ram Corsair PC-6400 (800) sitting at 832Mhz with never an issue.

 

I put a new video card into my system and was looking for ways to give the system a boost until next year when I will update the cpu/mobo/ram.

 

I tried uping the system clock to 355MHz pushing the E6600 to 3.2GHz and figured if I put in some PC 8500 (1066MHz) and changed the ram divider to 800 (2:3) I would have a nice boost to the system for the next 6 months or so.

 

My only problem is the system will not post with the PC-8500 ram installed.

I have some Corsair Dominator CM2X1024-8500CD5 (2 x 1 GB) Timings are 5-5-5-15 2.1V ver1.5.

 

The system seems quite stable with the increase in clock speed and the old ram installed.

 

Have I missed something? Does my system setup sound right?

Could it be the ram is the issue?

Should I try different ram?

 

Any suggestion will be much welcomed.

 

Thanks

 

Luke

[Wired]

Are you attempting to run the system with both the 6400 and the 8500 in it at the same time?

[Dangerman]

Hey Wired, No I am not trying to mix the ram.

Ive tried single dimms in each channel one at a time as well, and still wont post.

 

Danger

[RAM GUY]

Did you try and reset the MB BIOS with one of the 8500 modules installed? And can you test them in another system to be sure it is not some other issue?