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New to sabertooth 990FX a couple questions

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givmedew

Member
Joined
Sep 3, 2010
Location
Chicago
I went from a M5A97 w/ ADATA 1333 2x4GB Low Voltage running at 1600MHz to a Sabertooth 990FX w/ Corsair Vengence 1600MHz 2x4GB running at 1600MHz

1st question: Is this board capable of running the clocks at lower voltages? It seems so to me. Because on my other board the lowest I could run all 6 cores on a 960T @ 3.6GHz with cool+quiet and the other power saving features was 1.308v now I can run it at 1.284 which seems to be a significant heat savings.

2nd Question: I bought Vengence 1600Mhz 2x4GB kit 9-9-9-24 I thought surely I would be able to overclock it but for some reason I can't seem to get a decent overclock and by decent I mean 1800MHz. This is upsetting me since when I benchmark it on aida64 it is almost exactely the same speeds as my 2x4GB ADATRA XPG Low Voltage 1333 running at 1600. But it is running at a higher voltage is hotter and since it has oversized heatsinks my CPU heatsink is backwards which I think actually matters (ULTRA Chilltek Black peltier). So am I doing something wrong or is this the limitation of the board or is this crappy ram. I also just discovered that I could have gone to the compusa that is 30min away from me instead of the one that is 20min from me and could have picked anything from the website since it is the warehouse in naperville. I am going to go there on the 1st and see if I can exchange this RAM for something else. If I can should I get 1800Mhz ram?

I can get this http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=7114150&CatId=4534 for the same price I paid for the 1600MHz Vengence heck I can actually get the 1866MHz vengence for the same price as I paid for the 1600.
 
I linked that big thread and decided to answer a couple of your questions point blank.

The Sabertooth in general has a good cpu voltage regulator. It might be possible it takes less voltage to the cpu. Or it could be just the way the voltages are monitored from the mobo I/O chip. The more relevant measure of using lower voltage for real would be the Core Temps. If they are really lower on this mobo, then the cpu is really getting less Vcore.

Most DDR1600 ram is just DDR1333 ram that is overclocked. So at DDR1600 you would not have much overclock left. Some of DDR2166 ram might more easily run DDR1800 or so and allow the ram timings to be tightened a little bit at the slower speed.

The Thubans seem to have a little better IMC than the Denab processors so they might more easily reach DDR1800 with good ram. The IMC in the FX-series of processor is generally able to go into the DDR2000 range but it depends on the ram and the IMC in the processor itself.
 
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