(really) unstable ram problem

hi, i have a problem with my pc, and its getting really annoying now so here i am...

anyways, what happens is that my ram never wants to run faster then around 880mhz when it's rated for 1066.

the strange thing is no matter what i do i can't get it to run stable (bsod @ stock speed/endless reboot when oc'd)
800 works fine, but you know how it is...
wth should i do?
i have new ram sticks the cpu is rock solid and temps dont go above 60c

System-
ga-ep45-ds3r
kingston hyperX ddr2 1066
corsair hx520w
intel q9550 usually @3.4
xfx hd5850 black

if u need more info just ask

oh!
forgot
it's 4x2gb setup

voltage is supposed to be 2.3, have tried under and over that, timing is 5-5-5-18, not even 7-7-7-30 could make it work... (can't go higher)
and yes i have tried testing with memtest and failed

thx for replying.

hmm, ok tried that with the old sticks, and found out that 1 was broken..
will try soon
(as i get it back together lol)

no, i meant that 1 of the old ones where broken...
(thats why they are "old" )

Alright! I am eager to hear back!

nvm, apperantely bios resetted to default when i tested.

Test another stick in that port. Check if it works. Also, check the stick you KNOW works in a different port. If you end up with all sticks working but only in the first port, it's the board.

Well, if you can still return it, I would do that. Obviously it doesn't like dual channel mode or else all other RAM slots are somewhat damaged.

No problem!