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Crucial Crucial 6GB DDR3 1333 with GA-X58A-UD3R

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October 5, 2010 2:15:58 AM

I would like to know how I can push the memory further, I had it default to 1066 originally when I installed it with 9-9-9-28 @ 1.5v now it is tightened to 8-8-8-24 at 1333 @ 1.6v and I have tried over and over to get it to 1600 or better with no luck. Any ideas?
a c 163 } Memory
October 5, 2010 4:23:06 AM

Hi HugoDrax and welcome to Tom's forum.

Can u post the link of the RAM that u have?
a c 347 } Memory
October 5, 2010 5:08:27 AM

^ so finally we're checking.

The simplest is to adjust your Memory Multiplier to 12 {Speed / BCLK}. However, if your Rated speed is exceeded by ~ +15-20% you will begin to have errors/BSOD/instability. 1333 MHz + 20% (~ 267 MHz) is that threshold.

Initially, I would try the stock CAS speeds, increase the Memory multiplier, and increase by +0.2 Volts. Next I would increase the BCLK from 133 to 160 and decrease the MM to 10, but still keep the CAS and increase by +0.2 Volts. Messing around with CAS can do more harm than good. BTW if you DDR has a poor heat spreader even if you can find a stable setting Prime95 may overheat the RAM -> unstable, and lets not forget Memtest86+.

Good Luck!
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a c 163 } Memory
October 5, 2010 7:40:59 AM

If I'm right the stock specs for that RAM are: 7-7-7-21 @ 1.65v.
October 5, 2010 3:30:28 PM

Hey thanks a bunch for the welcome and the quick response! I am trying to get this ram to overclock so that I don't have to spend the cash on more expensive ram. The link to the ram I have is: http://www.newegg.com/Product/Product.aspx?Item=N82E168... Also, the motherboard I am using goes in even increments up to 1.64v it skips over 1.65v. The new i7 motherboard bios is far more confusing than the q6600 I replaced! Thanks again
a c 347 } Memory
October 5, 2010 4:22:33 PM

^Again, since "OC RAM" is the topic at hand - KEEP the rated CAS and/or lower. The best & most stable performance improvements are via BCLK, and lastly increase the Voltage ONLY if needed. Anyone who knows RAM & RAM OC knows this off the top of their head w/o thinking. You will be tinkering with both CPU & RAM OC, and in my experience I first find a 100% stable CPU OC with RAM @ baseline {rated speeds/CAS/Voltage} and -> then tweak the RAM

In addition, to {check} the RAM OC isolate the CPU speed by beeping it the SAME {e.g. 133 X 20 = 2.66 GHz ; 160 X 17 = 2.72 GHz}, and run Super PI.
Info - http://en.wikipedia.org/wiki/Super_PI
D/L - http://virgilioborges.com.br/hyperpi/

Good Luck!

Footnote - if you follow my advice you "may" be able to get 25~30% RAM OC. I've found 1333 ~ 20% and 1600 ~ 25% increases are "ideal." Heat is the enemy and poor/ineffective heat spreaders keep the "stable" RAM OC down.

edit:
CT3KIT25664BA1339 9-9-9-24 @ 1.5V -> Keep those settings; since this DDR has NO heat sinks don't expect more than 1500-1600 MHz <or> aim a fan over the tops of the sticks.
a c 163 } Memory
October 5, 2010 6:02:29 PM

That RAM can hit the 1333 with 8-8-8-21 @ 1.5V or 8-8-8-24 @ 1.5V. Crucial is a very good OC RAM and those kit without heat sinks don't show the real power that they have.
a c 347 } Memory
October 5, 2010 7:09:23 PM

^ First recommended both CAS + Voltage - but now lower - make up your mind?! I know I'm not clairvoyant.

@jaquith -> "KEEP the rated CAS and/or lower" & "lastly increase the Voltage ONLY if needed"

Voltage + Speed = Heat...no heatsinks...~+20%...going to get hot + unstable. The OP RAM isn't really a "good candidate" for OC, but I 100% confident that it can be OC - the "Question is how much?"

edit: OP needs a baseline first. Raising or lowering CAS need to b done last changes may increase or decrease performance.
a c 163 } Memory
October 5, 2010 9:50:43 PM

The baseline is the stock specs if the rig isn't stable with that specs maybe isn't stable with OC specs.
a c 347 } Memory
October 5, 2010 10:00:17 PM

HugoDrax said:
...push the memory further, I had it default to 1066 originally when I installed it with 9-9-9-28 @ 1.5v now it is tightened to 8-8-8-24 at 1333 @ 1.6v and I have tried over and over to get it to 1600 or better with no luck. Any ideas?

Yeah?! It isn't stable @ 1600 MHz with CAS + Volatges used.

And the "Idea" is to leave alone BOTH CAS + Voltages to get a baseline with the "Memory Multiplier to 12" as I posted 1st. Then "IF" needed mess around with the Voltages and "IF" you raise the CAS then you defeat the RAM OC.
a c 163 } Memory
October 5, 2010 10:07:49 PM

^I agree with you (for 1st time I think).

Crucial is a very solid manufacturer but with change the CL and voltage sometimes isn't enough for stable RAM frequency more in a Gigabyte mobo.
!