# Sav,
My experiences with my 2x2GB Corsair memory (1800 Dominator, see sig) with respect to running them at DDR1800 are:
1) It is mandatory to use the BLACK slots.
2) Use the 333 FSB strap to NB.
3) I advice to use Memtest 86+ v. 2.01 to test when tweaking for the right settings - errors will come fast (especially test 5) and you have a good idea what is causing the errors.
4) 1N is possible.
5) You need 1.5+ NB voltage (and I suggest active or watercooling on NB).
I have spent a LOT of time (and godwill from xt0m, thanks) trying to run DDR1800 stable. I wasted a lot of time Priming (e.g. 7 h stable blend test that suddenly would give an BSOD at ordinary use) at settings that made errors within few minutes in Memtest. Therefore I will not yet brag about beeing stable at that speed. However, now I have found settings at 9x450, DDR1800 cabable of completing at least 2 full passes. Tomorrow I will tell if it is truely stable in Memtest and then I will Prime to see whether the settings are stable in Windows when the CPU is loaded as well.
I'm sure you can't wait until tomorrow to se my settings so here they are (even though I can not claim they are truely stable yet or the voltages can not be lowered):
BIOS 0501
Multi: 9
FSB strap: 333
FSB: 450
PCIE: 100
DRAM: 1800
CMD: 1N
Primary timings: 8-8-8-25, the rest Auto
2nd and 3rd timings: All Auto
Dynamic and static read/write control: both Disable
CPU: 1.4625
CPU GTL: 0.65
PLL: 1.5
FSB TV: 1.4
NB: 1.55
NB GTL: 0.61
SB: Auto
C O-C V: Auto
LLC: Performance
Hope this will help you and others struggeling with 2x2GB memory.
****UPDATE: The above settings are Memtest 86+ v. 2.01 stable for 8 h+ (18 full passes) so at least the memory is stable. Priming at the moment with the same settings.****








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