Hi, I currently have 2 sticks of 512MB corsair XMX Pro DDR400 memory modules. I want to install a new heatsink on my cpu, a zalman, but because of the LED's on the memory sticks heatspreader they don't fit under the new heatsink (they prevent it from laying flat). I was wondering if i could use these in the 2 extra slots above, as then they would fit or are they only designed to work in a particular order, i.e bank 1,2,3 etc? I don't want to try it out without asking as i don't want to go spreading thermal compound on the cpu and taking the old heatsink mounting off the mobo only to find it does't work. Being prepared is the best thing imo :) Thanks

What motheroard?

Sorry, the motherboard model is a Gigabyte GA-K8NXP-9 socket 939, nforce 4 ultra, 4xDDR400 slots http://www.giga-byte.co.uk/Products... Come to think of it, the same question will apply to this board too - DFI LANPARTY UT CFX3200-DR/G http://eu.dfi.com.tw/Product/xx_pro... If you could answer the same question for both boards that would be much appreciated. Thank you

On the GA-K8NXP-9, you've got four DDR400 (two purple & two orange) slots. From what you posted earlier, there seems to be some clearance issues with the purple slot because of your aftermarket HSF. With that board there is no problem using the 2 x 512MB sticks in the orange slots and running them in dual channel mode. Gigabyte prefers you use the two purple slots first if you only have two sticks & are planning on a dual channel configuration, but they did not emphatically state this as a fundamental requirement for dual channel to work, so I wouldn't worry about that at all.

thanks for your help :)