What memory should I buy ?
Hi,
I have P5Q3 Deluxe with OCZ3P16004GK memory (2x2GB).
I am struggling to get it stable for several month already and it looks stable but then again it freezes and BSODs every several days or so.
I am pretty tired of it and want to replace the memory, here I need your advise. What 1600Mhz memory should I buy that will work without any special bios setting/tweaking ?
I have Q9540 CPU if it matters and I want to have 4Gb of RAM. It can be 2x2GB or 4x1Gb ....
Thanks in advance.
NB and CPU skews on 45 nm quadcores
(Originally posted on the 45 GTL setting thread, might be interesting here for ex. for turbatos)
Hello,
after having wondered about if I can manage to run my Q9550 E0 and the P45 NB at the stock GTL values after all after such a long time (Bought my CPU in October), I tried out what powellandy did, also after having read something along the lines from mikeyakame.
And, I was successful. I just felt that a narrow range of 0.66-0.69x for stability on all GTLs was not looking like the system felt overly well. Here are my results, old first:
Mainboard: ASUS P5Q3 Deluxe Wifi@n
FSB Clock: 450 MHz (x8.5=3825)
CPU VCore: 1.275V
DDR3 RAM Clock: 1350MHz (4x1 GB Corsair 1600 modules)
NB Volt: 1.4V-1.44V
FSB Term Volt: 1.36V
CPU GTL Ref (0/2): 0.66x-0.69x, using 0.68x
CPU GTL Ref (1/3): 0.66x-0.69x, using 0.68x
NB GTL Ref.: 0.66x-0.69x, using 0.68x
LLC: Enabled
CPU Clock Skew: AUTO
NB clock Sew: AUTO
New:
Mainboard: ASUS P5Q3 Deluxe Wifi@n
FSB Clock: 450 MHz (x8.5=3825)
DDR3 RAM Clock: 1350MHz (4x1 GB Corsair 1600 modules)
CPU VCore: 1.275V
NB Volt: 1.4V-1.44V
FSB Term Volt: 1.36V
CPU GTL Ref (0/2): 0.63x-0.70x, using 0.63x or 0.65x
CPU GTL Ref (1/3): 0.63x-0.70x, using 0.67x or 0.68x
NB GTL Ref.: 0.63x-0.70x, using 0.63x or 0.65x
LLC: Enabled
CPU Clock Skew: 500 ps delay
NB clock Sew: 400 ps delay
400/300 works, too, less than that tends to instability. Once again it shows that automatic settings aren't really good...
I am currently using 0.65/0.68 to not be on the razor's edge. These settings also take into account that ASUS is trying to keep the GTL references 0/2 and 1/3 apart...on top of this, the stable way higher GTL reference range indicates that this is a lot more of a stable setting than previously. However the previous settings without skews were tested 11 hours prime stable, too.
The best way of stabilizing a 45 nm quadcore above FSB430 appears to be to try and compensate with the clock skews first and leave GTL Ref. lines at defaults (not AUTO!), and then test the upper and lower limit of stable GTL settings. Then use a value that's in the middle, to be as far away from the limits as possible.
Translated into more analogue terms, this means the smaller the stable range of GTL references is, the closer the signal overshoot and undershoot are getting to the reference line. With it, the probability of one of them crossing the reference line increases drastically,and with it certainly the chance of having data corruption on the processor bus.
If you've got any questions or need my full Ai Tweaker settings, let me know.
Trying to get stability at 3.8 Ghz q9450.
He folks,
If anybody has any suggestions ... please let me know.
I've got my system up and running at 3.8 ghz, i can throw about any benchmark / stresstest at it and it keeps running (though it starts throtteling after about 2 minutes in intel burnin test, but only just)
cooling is a scythe ninja copper with std fan, tried a 3000 rpm static pressure 133 cfm fan on it, still it starts throtteling at around the same time as with the standard fan.
Vcore = 1.30V
vNB = 1.6 (was running at 1.56 but it keeps freezing after some time, normally notice it when i come home from work.)
mem = 8-8-8-28-82 (it's OCZ 1600 1G modules ... all 4 bank occupied) running at 1266 mhz at 1,9V
pll = 1.52V
p5q3 bios 2105
Have not played with GTL's yet ... tried once, but every setting resulted in a non-boot scenario ...
i've run actually better then this everyday freezing at 3.8 Ghz but then with 1.28 vcore ... thought i'd bump it up a notch looking at numbers from different users ... still, it didn't help me ... comp is still freezing every day ... the night it normally survives ... it's running seti + cuda after 60 minutes of idle time, seti at 75% because it then only reaches about 80C and i actually don't care about that that much ... realtemp's numbers i don't trust that much.
Any help would be appreciated ...