Odd GPU behaviour caused by RAM?

Gigabyte Ga-ma790x-ds4 motherboard
September 19, 2010 at 09:35:38
Specs: Windows 7 Home Premium x64, AMD 965 BE, OCZ 2 x 2 GB Vista Platinum kit
Specs are as follows:

Mobo: Gigabyte GA-MA790X-DS4
GPU: Powercolor HD 4870 512 MB
CPU: AMD 965 BE @ stock settings
CPU cooler: Titan Fenrir Evo
RAM: 2 x 2 GB OCZ Vista Platinum PC2-6400
PSU: Corsair HX 620
OS: Windows 7 x64 Home Premium

The Fenrir Evo is a recent addition to my computer because I won it in a competition. It is very big. Since installing it, I have had to move my RAM modules over to the red slots instead of the yellow ones, because the Fenrir is in the way. See photo:
http://img707.imageshack.us/img707/3531/059vp.jpg

However, for some reason, I can only use the third RAM slot. This means i can only use one stick of RAM. If I attempt to use both sticks in slots 3 and 4, or just a single stick in slot 4, this happens on my graphics card and there is no POST:

http://www.mediafire.com/?sd2taeuifi1o2gn
Warning: 20 MB AVI file.
Sorry that the picture is so dark, but you can get the gist of what's happening there.

Any ideas how to fix this and be able to use both sticks of RAM again at no expense please?

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#1
September 19, 2010 at 11:38:43
The obvious solution is to get rid of the stupid heatsink. You shouldn't even have to ask...it's way too BIG!

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#2
September 19, 2010 at 11:50:05
I'm with jam. That would make a good paperweight. What the hell were they thinking when they made that. A standard heatsink will work just as well.

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#3
September 19, 2010 at 12:14:05
Phenom II X4 965 with 800ddr?

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#4
September 19, 2010 at 12:18:17
I was only too happy to get rid of the stock heatsink. It's very loud and makes an ear-piercing noise, as well as not being able to keep the CPU cool. On the stock heatsink it would idle at about 38 C and load would take it beyond 65 C when the max temp stated by AMD is 62 C.

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#5
September 19, 2010 at 13:05:41
Maybe the standard heatsink you got was faulty.
you shouldn't even be able to hear a heatsink fan running. The diff between 65c and 62c is about 5 degrees F. Not critical. If it would overheat, the machine would shut down.

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#6
September 20, 2010 at 05:36:07
I've read a fair few stories online about the stock HSFs being noisy on the 955 and 965.

Would it help if I said I'm using a beta BIOS? Version F10a, because versions F9 and earlier didn't support the 965. I'm using the 125W version of the 965.

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#7
September 21, 2010 at 11:15:57
Would it be possible to turn the heatsink 90 degrees so that it doesn't interfere with the RAM slots?

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#8
September 21, 2010 at 12:37:11
Alternatively sell the preposterous heat sink on ebay and use the money to buy a more sensible one. You might even make a little profit and you'd be able to use all your RAM slots.

Biscuits are good, but keep the crumbs off your keyboard!


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#9
September 21, 2010 at 13:22:24
@ jam: That heatsink only mounts one way round on AMD boards. The only other option would be to have the fan facing the top of the case where there is no vent for a top-mounted fan.

@ Samt1516: Yeah I think I'm going to end up doing that now. Nobody on any of the forums I have asked have been able to come up with a solution. It's a shame because I actually love the cooler, if only it was half an inch smaller on each side. Annoyingly, it came in that awful packaging which you have to completely destroy in order to get the product out, so I can't send it back.

Would you recommend any particular cooler? I'm looking at the CoolerMaster Hiper 212 Plus.

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