"mudpark" in his "Guide for Nf41 Stability" post at the EVGA forums says you can use this one.
http://www.jab-tech.com/Thermalright-K8-motherboard-backplate-pr-2698.html
I'm going water so I am ordering one just to make sure, I'd hate to have my system apart and find the stock one doesn't...
I had my 2x1gb Ballistix at at 10x270 1:1 for a 3-4- weeks but my opteron 146 will run at 2.9GHz so I was running a divider.
Then I had the dreaded dead Ballistix and had to RMA, I just got them back yesterday and
they don't run stable even with a divider their running 246 but game will...
CL1115N.P1
This is my 2nd set and just last night they started BSOD and reboots.
Pulled one stick out (can't even get past BIOS with it in) and the one that's left in runs ok but not near the speed it was before. 250 3-3-3-8 at 2.75 1t