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[PLS HELP] X79 Memory Overclocking

post #1 of 4
Thread Starter 
Hi guys,

I am trying to overclock Geil Corsa 1600 CL9-9-9 on Gigabyte X79 UD7 .

On my last Z68 rig I couldn't get it boot even on 1866 but on this X79 platform I tried 2133 12-12-12-30 and its perfectly stable... but here comes my problem, I was searching over internet and can't find any guide which would tell me somehow simple how should I proceed when tightening/loosening timings.

I remember DDR2's were like 3-3-3 , 4-4-4 and so on , than when DDR3's came out timings went up to 7-7-7 , 8-8-8 etc but than it went somehow crazy and numbers like 6-7-6 , 10-11-10 or even 9-11-10 started showing up and now when I am reading some X79 overclocking article there is some guy just trying x-z-y than y-x-z than x-z-y and I have no idea why just these numbers frown.gif

Could anybody please explain me how should I process now when I want to tighten this timing -> 12-12-12-30-202-T2 and why ? Or throw me some link with explanation ?

Any advice would be great, thx in advance wink.gif

And also, anybody knows whats safe 24/7 memory voltage (vdimm) ?
Edited by Flisker_new - 4/18/12 at 12:34pm
post #2 of 4
Thread Starter 
Nobody knows ? : (
post #3 of 4
Well I would recommend setting 1.65v as your 24/7 voltage. This should help the memory out in being able to perform better, as well as not cause degradation to the CPU's memory controller. It's going to be trial and error with getting it stable. Just mess around with timings yourself and then run memtest86+ to test for stability. Then keep in mind once you get the memory stable, that doesn't mean the processor can handle running it. You may have to adjust VCCIO voltage (CPU's memory controller voltage) and then run something like Prime95 blend test to make sure it's stable.

I don't know if this is good way to explain it, but the closer the number is to the beginning, the harder it is to stabilize. So I would start out at 10-10-10 and if it fails you could try 10-11-10, 10-12-10, 10-12-11 etc... until it works. I wouldn't put any numbers above 12 though. If you can't pass memtest86+ like that drop to CAS 11 and repeat.
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Beast
(14 items)
 
Dell XPS Faptop
(8 items)
 
Alura :)
(11 items)
 
CPUMotherboardGraphicsRAM
i7 4790k Asus Z97 Pro WIFI-AC Asus GTX 1080 Turbo G.Skill 2 x 8GB F3-2133C9D-16GXH 
Hard DriveOptical DriveCoolingOS
2 x Intel 730 480GB SSD in RAID 0 Asus DRW-24B1ST/BLK/B/AS Noctua NH-D15 Windows 7 Ultimate x64 
MonitorKeyboardPowerCase
2 x Asus VS239H-P Logitech G510 Seasonic SS-660XP2 Fractal Design R4 Blackout 
MouseMouse Pad
Logitech G500 Xtrac Ripper 
CPUMotherboardGraphicsRAM
Core 2 Duo T5250 @ 1.5ghz Dell 0N6705 Mobile Intel 965 Express 2 x 2GB Hyundai/Kingston DDR2 533mhz 
Hard DriveOptical DriveOSMonitor
OCZ Summit 60GB SSD Slot Load DVD-RW Windows 7 Ultimate x64 13.3 inch 1280x800 
CPUMotherboardGraphicsRAM
i5 2500k Asus P8Z68-V Pro MSI R7970 Lightning BE 2 x 4GB G.Skill Ripjaws 2133mhz 
Hard DriveOptical DriveCoolingOS
Mushkin Enhanced Chronos 240GB and WD Black 1TB Asus DRW-24B1ST Cooler Master Hyper 212 EVO Windows 7 Ultimate x64 
MonitorPowerCase
Hannspree 24 inch Thermaltake Tough Power TP-750P 750W Gold Cooler Master HAF 932 
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post #4 of 4
Thread Starter 
Thx for help, I will give it a try wink.gif
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