i seem to have hit a bit of a wall and it seems no matter what I try I cannot seem to get it to even get to post with a FSB beyond 342 Mhz.
at 340 its stable as a rock, at 341 it seems to get a lil touchy on a really hot day even though it is idle and temps are just fine...
It's my sig rig and it runs fine at 3.74 Ghz but i would love to push it over the 4 Ghz barrier
The ram is 2x 4GB Geil (value plus DDR3 1600 ram) downtuned to run at 1333
I only get a couple of options for setting the ram speed, Auto, multiplier 1, multiplier 2 (multiplier 1 and 2 seem to be a preset ratio by the motherboard)
here is the cpuz validation results which detail ram timings etc
http://valid.canardpc.com/show_oc.php?id=1687549
at the moment ram timings I think are set by spd, I have tried manually setting them but to be quite honest, not quite sure how to get the tRFC above 20 for the faster ram speeds... as the bios seems to keep defaulting to 20 - i can enter a number lower than 20 and it will retain it, but over 20 it won't.
the ram is running at 681 Mhz yet the JEDEC's for the ram suggest it can run at 740 Mhz which would see me being able to push the FSB to 370 Mhz by rights...
I have been cautious I suppose on messing to much with the voltages for NB, VTT and mem voltage
I have tried raising them some - Vtt I tried various voltages up to 1.35
Vcore is currently set at +100mv and I only have the options of auto, +50mv, +100mv, +150mv
I have tried the NB at a 1.35 voltage as well but as I say have not been too sure on what are deemed reasonable values and not wanting to fry tho mobo have been cautious...
I have my PCI frequency manually set at 100Mhz - with the options of auto or manually setting the to anywhere between 90 and 150 mhz
Side note - originally I was using 1333 memory - kingston value ram and i had the same issue of not being able to get to post once the FSB got over 342... so i brought the 1600 ram on the premise that I thought I was ram locked due to the 1333 ram... it seems that it made no difference going to the faster ram.
Any advice, help / suggestions with this will be greatly appreciated.
at 340 its stable as a rock, at 341 it seems to get a lil touchy on a really hot day even though it is idle and temps are just fine...
It's my sig rig and it runs fine at 3.74 Ghz but i would love to push it over the 4 Ghz barrier

The ram is 2x 4GB Geil (value plus DDR3 1600 ram) downtuned to run at 1333
I only get a couple of options for setting the ram speed, Auto, multiplier 1, multiplier 2 (multiplier 1 and 2 seem to be a preset ratio by the motherboard)
here is the cpuz validation results which detail ram timings etc
http://valid.canardpc.com/show_oc.php?id=1687549
at the moment ram timings I think are set by spd, I have tried manually setting them but to be quite honest, not quite sure how to get the tRFC above 20 for the faster ram speeds... as the bios seems to keep defaulting to 20 - i can enter a number lower than 20 and it will retain it, but over 20 it won't.
the ram is running at 681 Mhz yet the JEDEC's for the ram suggest it can run at 740 Mhz which would see me being able to push the FSB to 370 Mhz by rights...
I have been cautious I suppose on messing to much with the voltages for NB, VTT and mem voltage
I have tried raising them some - Vtt I tried various voltages up to 1.35
Vcore is currently set at +100mv and I only have the options of auto, +50mv, +100mv, +150mv
I have tried the NB at a 1.35 voltage as well but as I say have not been too sure on what are deemed reasonable values and not wanting to fry tho mobo have been cautious...
I have my PCI frequency manually set at 100Mhz - with the options of auto or manually setting the to anywhere between 90 and 150 mhz
Side note - originally I was using 1333 memory - kingston value ram and i had the same issue of not being able to get to post once the FSB got over 342... so i brought the 1600 ram on the premise that I thought I was ram locked due to the 1333 ram... it seems that it made no difference going to the faster ram.
Any advice, help / suggestions with this will be greatly appreciated.




