Hi there everyone, first of all I am not on a GA x38 DQ6 but i feel like this is the thread that has helped me the most in my overclock. I am running a GA x48 DS5 which uses ddr2, so the x48 DQ6 thread is not much use to me as it is a DDR3 board.
I have used many bits of information from you guys over the last few months and have, finally, achieved a stable prime running 4.6ghz OC on an e8400 at 1.46875v showing 1.47200 in OS with load line calibration enabled. I am stoked! Thank you all for posting what you have, I could not have learned what I now know without all of your help.
I think the
BIOS is possibly the same or very close so i will
post my settings in the hopes that they may help someone else, remember this is a GA x48 DS5. All the things I learned in this thread seem to apply to my board and
BIOS (with some consideration for possible differences), so maybe it will work both ways.
My settings:
E8400 @ 4.6ghz
GA x48 DS5
BIOS F8a
CPU 4.608ghz
FSB 512mhz
vcore
BIOS 1.46875v
InOS 1.47200v
FSBv +.35=1.55
GMCHv +.175
Loadline Calibration: enable
DDR2v +.25=2.1
DDR2@ 1:1 2.00b(FSB@512mhz)=1024mhz
Settings at 1024:
tCL: 5
RAS to CAS: 5
CAS to RAS: 5
RAS precharge: 5
PreCharge Delay: 18
tRRD: 4
tWTR: 5
write to precharge: 6
tRFC: 72
tRTP: 5
Static tRead: 9 <=performance level in memset
tRead phase adjust: Auto
Command Rate: 2t
GTL1 Auto
GTL2 norm
CPU/PCIEX/GMCH drive control: 900mV
CPU skew: norm
GMCH skew: norm
At Prime95 start:
Huge vdrops intermitently to 1.440 for a period of time but seems to have stabalized at 1.456 under load.
1.46875-1.45600=0.01275 vdrop acceptable.
1.46875-1.44000=0.02875 vdrop yikes!
1.47200-1.45600=0.01600 normal vdrop for the system and what I seem to be getting from these settings, except when it dives to 1.44 which is a cause for concern.
Temps at 1 hour prime95 with AC on: 48c Cores 44c Northbridge (water, AC injected into case and through radiator, 92mm and 120mm fans cooling the stock NB heatpipe setup.
Have not seen vdrop spikes to 1.44 since about 15-20 minutes into run. 6 total spikes evenly spaced with second and third being slightly longer in duration. WTF?
So those are my current settings, I will try to tighten that
ram up but I am just glad it runs prime OK. I have some thoughts on how things work, possibly anything I say has been covered several times in this thread but its long and hard to be sure.
GTL seems to be ok in some instances of getting a system almost stable over the edge to where it will run prime but it seems like its bad for adjusting until a system will boot and run stable until the heaviest loads are put on it.
CPU skew is good for when
ram is timed slowly but seems to have limited use (for me, so far).
GMCH skew is VERY effective at balancing things out when the
cpu/
ram timing is 5:6. Faster the
FSB and therefore the numerical difference between the
cpu bus and
ram bus the more skew I apply, and it seems to work. I have run prime with my ddr2 at 1198mhz 5:6 on a 489mhz
FSB with 250ps GMCH skew, its OCZ pc-9200.
Once again thanks for all the great thoughts and ideas!
Onward to 5ghz I hope
Linear Mode
