Just keep the CAS at 2. It'll be more stable that way. And it might very well be happier at 2-2-2-11 than at 2-3-3-11.
I'm reliving my socket A overclocking days vicariously through you.
But the BH-5 back in and it refuses to run 2-2-2 at 400FSB without instantly crashing when windows loads, 2-3-3 I can get windows to load, but it won't run any programs. 2.5-3-3-11 is the only thing that is stable. Part of it might have to do with they are 512MB sticks, and one is Geil and the other Corsair (Both PC3500) I realy miss my 2x256 Kingston PC3000 I got from new egg back in the day, that stuff was amazing on my 939 DFI LP, 540FSB as 2-2-2-7! (3.4-3.5v I think) Also had it on my socket 754 DFI LP and it ran 500FSB at 2-2-2 with 3.2v (Boards max)
Somewhere in one of my boxes is one of those OCZ voltage boosters a bud gave me years ago, but I was using that DFI LP 939 at the time and had no use for it (They had like up to 3.7v or more as an option) Maybe if I can find it and it still works then I can get this BH-5 to run ok on the board.
Well..I swapped CPU's and no joy!
It apears it might be the motherboard, just can't get past the 1.9ghz mark and have it be stable...spent another half a day trying different settings on the new cpu and nothing worked, even removed the board and checked it for problems (Blown caps, burnt traces, making sure the SP-97 was seated properly )
So it apears the motherboard is getting weak...or that my 500 watt Antec True Power might be going bad (It has the adjustable voltage rails...was the first one on the block to have one, paid like 200$ for it back in the day)
I have a spare OCZ 520 (Also with adjustable rails) I might pop in there and try tonight.
I think it might be time to try and find another DFI LP Rev. B though..I realy miss that board...I had a NF-7 Rev 2 before that, but never could get above 440FSB with it, though they are easier to find these days.
I still have the orignal LP box with all the accesories in it, found it hidden away in the basement the other day, never used theat "Front X" control panel, was still in there along with the carrying straps and other items.
Any body have a DFI LP Rev B. they might want to part with?