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I fail at memory overclocking...

post #1 of 5
Thread Starter 
I've been enjoying this website quite a lot, learning tons!
Now that I've read up on memory overclocking I thought I'd give it a go.
Sadly... this doesn't seem as easy as upping your CPU multiplier:rolleyes:


Anyways,
Currently I'm using Corsair Dominator memory
One interesting thing to note is that CPU-z shows Max Bandwidth as PC3-10700... weird.

440
This is MaxxMEM at stocks with 1T CR
When it was at 2T CR (actual stock) the speed was about the same but the latency was 52ns consistently.
It's actually very strange that the CR is the only thing I can change without complications.

Allow me to give you a quick run-down of what I did and what happened.

At first I tried to just lower the CAS by 1 while leaving everything else unchanged.
This didn't even allow me to get past Bios.

Tried setting the mem voltage from auto (1.5) to 1.6v and see if it made a difference.
Sadly that caused BSOD 0x50 so I gave up on that rolleyes.gif

At 1.65v I got BSOD 0xF4 which is bizarre since that relates to hard drive failure for as far as I know.

So now it's running at stock.
343

I probably didn't read up on this enough to be getting into this stuff tbh...
I went over BIOS to see what kind of options I have that relate to the memory but there's sooooooo many things I can change... it's ridiculous.
And the reason why I'd like to overclock the memory is because I kinda watercooled it biggrin.gif (looks really nice though, seriously)
But not only that tbh tongue.gif I'm trying to improve my 3D Mark physics score and I was curious to see how much memory would help.



Anyway,
Did I completely forget to change something before I start going over the timings?
Any suggestion you can give me is highly appreciated smile.gif
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Gangrene Machine
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post #2 of 5
CPU-Z as well as many other programs only show half of the actual bandwidth.
1066 * 2= ~2133Mhz, so everything is working fine thumb.gif

Now, for the over clocking. I wouldn't up the voltage much, just let it be at 1.5v for now. The timings/latencies are the most serious part.
As you probably know, lower latency = quicker/faster in terms of responsiveness.
To overclock, simply try to loosen the timings a tiny bit, then up the speed.
Try to go one step at a time, like from 2133 to 2400 or something similar, loosen the timings a little bit (-1 on the first three), run Memtest86+ for a while. If it works out fine, lower the timings one by one.

My personal RAM OC:

Stock:
CL9-9-9-24 2T
1600MHz 1.5v

OC'd:
CL-10-10-9-24 2T
1866MHz 1.5v

I bet I could over clock this cheap kit even further, but due to my motherboard, which jumps from 1866 to 2400 (nothing in between) I can't. (Other than BLCK over clocking, which isn't good for SB/IB)
Edited by bruflot - 6/19/12 at 8:47am
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post #3 of 5
I'm with Bru. There's a lot of memory out there right now that doesn't like to have the timings tightened at all. But has a lot of headroom when it comes to upping the frequency. In the not too distant past you really could "overclock" your memory in one of two ways... tightening timings and running at the rated frequency or slower, or loosening the timings and pushing the frequency higher. Sadly I really believe that many users, web reviewers and the general public have pushed the manufacturers in that direction. Everyone oohs and ahhs over memory that will run 300Mhz over it's rated frequency at stock voltage, but don't pay much attention to ram that will run at 1-2 clocks lower at factory speed or less.
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post #4 of 5
Thread Starter 
I'm starting to wonder.
COULD it be that I can't change that timing because my CPU isn't clocked high enough?

hmmm...

Let's test that right now thumb.gif


edit:

Ok SO!
Just tried again with a higher CPU speed and got some results smile.gif

Normally when my computer is at 24/7 speeds (which is 4.5Ghz and stock mem)I get about ~1450Marks on MaxxMEM².
When the CPU was running at 5Ghz the memory could sort of handle 9-9-9-27-2T.
I say sort of because if the memory was on those timings it wouldn't exactly boot.
Windows would start but explorer.exe wouldn't load, kaspersky wouldn't load and got numerous of problems.

When windows started at stock timings and changed the timings after with MemTweakIt to 9-9-9-27-2T it would stay stable long enough to run MaxxMEM again.
The latency greatly improved and scored around ~1770 Marks.
Sadly the memory doesn't like those timings, goes mental, freezes, and BSOD ^^

Regardless, it does make me believe that it can handle those timings but there's a problem elsewhere.

Any ideas? smile.gif
Edited by amputate - 6/19/12 at 9:35am
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Gangrene Machine
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OCZ Vertex3 + Corsair Force 3 + 10 TB storage LG BD Rewriter EK Supreme HF - Acetal+Nickel EK FC680 GTX - Acetal+EN 
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post #5 of 5
Are you still running stock QPI/VTT voltage and dram voltage? The QPI/VTT voltage is for the IMC - upping that a bit might improve stability, as could slight bump to the dram voltage.
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wevs rig
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Crucial C300 128Gb x2 RAID0  SK Hynix SH910 128Gb x2 RAID0 Western Digital Black Edition 1Tb Western Digital Black Edition 640Gb 
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Asus DVD / Bluray LG Bluray / Burner Custom H20 - Swiftech, XSPC Windows 7 Pro x64 
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