Blade Four X Issue

[blkstang08]

I purchased an ASICMiner blade (the old style that is overclockable) about 2 months ago.  Originally it had 2 X's listed in the chip display.  I was able to run it in high clock mode which equated to nearly 12Ghash/s. 

I've moved the blade to using it's own PSU and it now has the last 4 chips listed as X's.  I can't get the four X's to go away (I've tried 3 different PSUs and tried adjusting the voltage on that power lane).

Now it's only running at 9 Ghash/s and turning it to high clock mode causes the blade to reset.  Before you suggest my PSU being underpowered, I'm using the suggested one from the setup OP (850W Corsair).

Anybody have any luck getting X's to disappear?

Thanks.