OC with 4 DIMMs on 760G

[PliotronX]

I had rescued a 1045T from a recycled PC and got a Gigabyte 760G mATX board for a killer deal and put it into a 2U system with a Big Shuriken cooler. The fun part is with the RAM. This is one of the only mATX boards with 4 DIMM slots but I think I found out why. With two DIMMs, I can actually reach my target clock of 3GHz easily while actually undervolting and being prime stable. With all four, it gets dicey. Before I gave the 2x2GB pair to my dad, I had 20GB running at 13.5x214 prime stable (4 dimms) running the 1066 multiplier for ram at 8-9-8 because the 2x2GB was 1066mhz ram whereas the 2x8GB is 1600MHz so I got a 2x4GB pair of "1600MHz" (quotes because the Samsung chips on the PCB are 1333MHz) to replace the 2x2. With the 2x8 and 2x4 installed, it will only post at 800MHz and will not boot the os. I've tried all relaxed timings, ganged vs unganged etc..

What I am wondering is if the limitation for operation with four dimms is in the 760G, the dissimilar ram, or the IMC of the x6. Anyone have experience with these particular parts? Should I replace the board, the 2x4GB kit, or be happy with 2x8GB?

 

[DrMrLordX]

I would blame the dissimilarity of the RAM to start. Though I do not have any experience with those particular products . . .

The rational thing to do would be to test the system with 2 of 4 DIMMs in homogenous and heterogeneous configurations first, to see what happens (obviously the 1x4 + 1x8 configs won't run dual-channel).

 

[daveybrat]

Just be happy with 2x8GB IMO.

 

[PliotronX]

I would blame the dissimilarity of the RAM to start. Though I do not have any experience with those particular products . . .

The rational thing to do would be to test the system with 2 of 4 DIMMs in homogenous and heterogeneous configurations first, to see what happens (obviously the 1x4 + 1x8 configs won't run dual-channel).

True! I did remove the 2x8 and it liked the 2x4 and was able to run similarly as the lone 2x8. The dissimilar RAM really seems like it just because of being able to run with the 2x2 along the 2x8 so that's what makes me lean towards another kit of the 2x8 but they are over a hundred bucks which I'd rather put towards a modern build (ddr4) so I was eyeballing a 970m board which is not much cheaper and runs the risk of doing the same thing =\

Just be happy with 2x8GB IMO.

I think its most realistic and I thought the board or CPU were limiting the FSB with the 2x8 and 2x2 config but its so solid with just 2x8 that I'll probably call it good!

Thanks guys!

 

[daveybrat]

I'm assuming you picked up this board?

https://www.newegg.com/Product/Prod...65&cm_re=760g_gigabyte-_-13-128-565-_-Product

That's actually a very nice budget board. I built many AMD systems with older revisions of that board. Funny how as old as that 1045T cpu is, it's still a killer chip.

 

[PliotronX]

I'm assuming you picked up this board?

https://www.newegg.com/Product/Prod...65&cm_re=760g_gigabyte-_-13-128-565-_-Product

That's actually a very nice budget board. I built many AMD systems with older revisions of that board. Funny how as old as that 1045T cpu is, it's still a killer chip.

Yes that's the one! And yes, it is quite a zippy system! I threw in a 60GB Hectron X1 (when they were $21) for the OS and set up tiered storage with a 240GB CS1211 and 2TB Hitachi 7K3000, works too damn well. I did not want the 1045T to go to waste, bad enough to make a viable system around it. Have you messed with four DIMMs? I am wondering if this was never really addressed - would this affect a 970m board?

 

[daveybrat]

AMD 760G and 970 chipsets all seemed to have problems when populating all 4 dimm slots back then. That's why my old AMD 960T Thuban system with a Gigabyte 970 chipset has and still works fantastic with the original 2x4GB G.Skill Ripjaws kit. It also overclocks and unlocks the extra cores perfectly.

 

[PliotronX]

AMD 760G and 970 chipsets all seemed to have problems when populating all 4 dimm slots back then. That's why my old AMD 960T Thuban system with a Gigabyte 970 chipset has and still works fantastic with the original 2x4GB G.Skill Ripjaws kit. It also overclocks and unlocks the extra cores perfectly.

Thank you! That calms my furvor for the 970m. This thing runs very well, only heats up while stress testing and the big Shuriken does a good job of keeping it in the low 50s with not that much chassis airflow. It feels like it could take higher frequencies but I'm happy with it!