Where to put only 2 x triple channel stick in gigabyte ex58-ud5?

Jak_Sparra

Distinguished
Mar 31, 2006
519
0
19,060
Hi,

My brother has the following rig:-

Windows 7 (64bit)
gigabyte ex58-ud5 motherboard
i7 920 (stock)
R9 270 graphics card. (changed from an hd 5870 about 6 months ago)
a 850watt PSU
Corsair Vengence 1866 RAM (3 x 2GB)

All has been fine for a couple of years or but now when he boots up it counts to a random number of RAM and crashes.
He has tried each of the 3 sticks of ram in the 1st slot and one of the sticks causes the system not to boot at all.
As the remaining 2 seem fine how does he get only 2 x 2GB sticks of triple channel RAM to work? I assume as it is only 2 sticks it will default down to dual channel, which for gaming should be fine. But where do the sticks go? Is it slots 1a and 2a? or 1a and 1b, or what?
It will just be a temp stop gap until he gets new RAM.
 

Jak_Sparra

Distinguished
Mar 31, 2006
519
0
19,060
I thought it might be slots 1 & 3. I'll tell him to try slots 1 and 3 and see what happens. And also what boju said that link don't work. When I searched for the Motherboard manual all I got was BIOS and driver downloads.

_EDIT_

I just called him to tell him, and as he is an impatient ass he has gone ahead and tried them in 1st and 2nd slots and says PC booted and he is on the internet now. He says windows shows 4GB of RAM available so I guess its ok. Weird. I could have sworn it should have been the 1st and 3rd..
He's about to test it on a game. I'll report back shortly.

Thank you for your help so far :)