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G.Skill Ripjaws BAD overclocking :(

post #1 of 9
Thread Starter 
Hi all,

So i have a 2x2Go G.Skill Ripjaws PC12800 , a Asus Sabertooth 55i motherboard with a Intel i5 750 cpu.
I o/c the cpu to 200x18 , 3.6Ghz.
I tried almost all settings, like 212x17 or overclock the RAM to 1600@1700 , give it a 0.1V more, 0.2V, lowering the cycles to 8-9-9-24, 9-8-9-24 etc...i can't have a stable system, many times it won't boot at all.
I heard a lot of good things on this RAM so i don't understand, maybe i don't know how to overclock DDR3.

Anyway i'd like to know if it's normal, i plan to replace it with a 2x4Go Corsair Vengeance PC3 1866 kit because it's pretty cheap and i never had problems with o/c Corsair RAM in the past (it's my first G.Skill kit, i never o/c because i had stock cooling on my cpu, now it have a Kuhler 620 on it so let's go lol).


Thanks for the answers ! smile.gif
My PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 2666@3614 Asus Sabertooth 55i Gainward Geforce GTX 460 GS 2Go 700@900 1... G.Skill Ripjaws 2x2Go PC12800 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 500Go CD-DVD burner Antec Kuhler 620 Windows 7 x64 
MonitorKeyboardPowerCase
Samsung 50" plasma wireless Logitech Corsair 650W Thermaltake 
MouseMouse PadAudio
wireless Logitech Steelseries Onboard - 2x2.1 Logitech speakers 
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My PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 2666@3614 Asus Sabertooth 55i Gainward Geforce GTX 460 GS 2Go 700@900 1... G.Skill Ripjaws 2x2Go PC12800 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 500Go CD-DVD burner Antec Kuhler 620 Windows 7 x64 
MonitorKeyboardPowerCase
Samsung 50" plasma wireless Logitech Corsair 650W Thermaltake 
MouseMouse PadAudio
wireless Logitech Steelseries Onboard - 2x2.1 Logitech speakers 
  hide details  
Reply
post #2 of 9
What about overclocking the CPU and leaving the ram run as it is without changing the values (just a suggestion)

I have got overclocked my own (previous) i7 870 to 4.0ghz without touching the ram I had (same ram i have now)

all i had to do is decrease its QPI multiplier so the ram would run at something like 1866 instead of 2000+ MHz
note: my ram was a corsair 1600MHz running at a stock of 1333 MHz.
hope that helps and gives you an idea.
post #3 of 9
Thread Starter 
Yes DDR3 is way harder to overclock i think :s
There are so many settings (at least in my Sabertooth bios).
Does someone know any good howto guide ? One that explain the QPI, turbo, timings etc... ?

I bought PC12800 because i knew someday i'll overclock the cpu lol, but i didn't think it would overclock so well, 2666@3600 and it's like it can go easily 3800, maybe 4000 or even more, so now my RAM is at stock speed and i can't overclock it, maybe it's time to upgrade.

I know i can overclock only the cpu, but i find it sad that the RAM won't benefit of the higher FSB (i don't even know if in DDR3 it's still called FSB lol...i think i didn't overclock PCs for a too long time, i'm pretty lost now).
My PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 2666@3614 Asus Sabertooth 55i Gainward Geforce GTX 460 GS 2Go 700@900 1... G.Skill Ripjaws 2x2Go PC12800 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 500Go CD-DVD burner Antec Kuhler 620 Windows 7 x64 
MonitorKeyboardPowerCase
Samsung 50" plasma wireless Logitech Corsair 650W Thermaltake 
MouseMouse PadAudio
wireless Logitech Steelseries Onboard - 2x2.1 Logitech speakers 
  hide details  
Reply
My PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 2666@3614 Asus Sabertooth 55i Gainward Geforce GTX 460 GS 2Go 700@900 1... G.Skill Ripjaws 2x2Go PC12800 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 500Go CD-DVD burner Antec Kuhler 620 Windows 7 x64 
MonitorKeyboardPowerCase
Samsung 50" plasma wireless Logitech Corsair 650W Thermaltake 
MouseMouse PadAudio
wireless Logitech Steelseries Onboard - 2x2.1 Logitech speakers 
  hide details  
Reply
post #4 of 9
Thread Starter 
Goddam it's p*ssing me off, can't even run it 1800@1840Mhz stable...what's the problem ? Everywhere i read that Ripjaws are excellent in overclocking ?
What would be the best upgrade ? Change it with 2x4Go Corsair Vengeance PC15000, or add 2x2Go Ripjaws and run it @ stock speed for half the price ?
My PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 2666@3614 Asus Sabertooth 55i Gainward Geforce GTX 460 GS 2Go 700@900 1... G.Skill Ripjaws 2x2Go PC12800 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 500Go CD-DVD burner Antec Kuhler 620 Windows 7 x64 
MonitorKeyboardPowerCase
Samsung 50" plasma wireless Logitech Corsair 650W Thermaltake 
MouseMouse PadAudio
wireless Logitech Steelseries Onboard - 2x2.1 Logitech speakers 
  hide details  
Reply
My PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 2666@3614 Asus Sabertooth 55i Gainward Geforce GTX 460 GS 2Go 700@900 1... G.Skill Ripjaws 2x2Go PC12800 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 500Go CD-DVD burner Antec Kuhler 620 Windows 7 x64 
MonitorKeyboardPowerCase
Samsung 50" plasma wireless Logitech Corsair 650W Thermaltake 
MouseMouse PadAudio
wireless Logitech Steelseries Onboard - 2x2.1 Logitech speakers 
  hide details  
Reply
post #5 of 9
I have the same set of ripjaws as you an i have to run them at the stock 9-9-9-24,But to overclock i have to right away run 9-10-9-24 1t.Right now i a running them at 965.00mhz or 1930mhz at 9-10-9-27 1t. @ 1.7 dram voltage.But i to was never able to lower the timings at all with these ripjaws.Hope that helps you some.Good luck. thumb.gif
post #6 of 9
Thread Starter 
I finally bought another set of 2x2Go Ripjaws PC12800, and guess what : "serial" is not the same...it doesn't look the same either.
Old ones are F3-12800CL9-2GBRL
New ones are F3-12800CL9-2GBXL

I launched CPUID and had another surprise :
Old ones "Max Bandwidth : PC3-10700 (667 Mhz)"....
W T F ?
I sent an email to G-Skill to know what's going on, still no answer after a week...
I now understand why i can't go further 800Mhz if it's some sort of rebranded PC10700...
My PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 2666@3614 Asus Sabertooth 55i Gainward Geforce GTX 460 GS 2Go 700@900 1... G.Skill Ripjaws 2x2Go PC12800 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 500Go CD-DVD burner Antec Kuhler 620 Windows 7 x64 
MonitorKeyboardPowerCase
Samsung 50" plasma wireless Logitech Corsair 650W Thermaltake 
MouseMouse PadAudio
wireless Logitech Steelseries Onboard - 2x2.1 Logitech speakers 
  hide details  
Reply
My PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 2666@3614 Asus Sabertooth 55i Gainward Geforce GTX 460 GS 2Go 700@900 1... G.Skill Ripjaws 2x2Go PC12800 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 500Go CD-DVD burner Antec Kuhler 620 Windows 7 x64 
MonitorKeyboardPowerCase
Samsung 50" plasma wireless Logitech Corsair 650W Thermaltake 
MouseMouse PadAudio
wireless Logitech Steelseries Onboard - 2x2.1 Logitech speakers 
  hide details  
Reply
post #7 of 9
This is nothing to be worried about, DDR3-1333 is the memory's JEDEC specification which CPU-Z takes as rated bandwidth.
post #8 of 9
Thread Starter 
Yes but PC12800 isn't supposed to be DDR3-1600 ?

Why a difference beetween my 2 kits ? I bought 2 PC12800 kits well known for overclocking, i'm sure if i put only the 2 GBXL ones i'll be able to overclock it very well, the 2 GBRL can't go 820Mhz without crashing at benchmarks :s
Don't what's the best solution, 2x2Go overclocked, or 4x2Go stock speed.
My PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 2666@3614 Asus Sabertooth 55i Gainward Geforce GTX 460 GS 2Go 700@900 1... G.Skill Ripjaws 2x2Go PC12800 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 500Go CD-DVD burner Antec Kuhler 620 Windows 7 x64 
MonitorKeyboardPowerCase
Samsung 50" plasma wireless Logitech Corsair 650W Thermaltake 
MouseMouse PadAudio
wireless Logitech Steelseries Onboard - 2x2.1 Logitech speakers 
  hide details  
Reply
My PC
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 2666@3614 Asus Sabertooth 55i Gainward Geforce GTX 460 GS 2Go 700@900 1... G.Skill Ripjaws 2x2Go PC12800 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 500Go CD-DVD burner Antec Kuhler 620 Windows 7 x64 
MonitorKeyboardPowerCase
Samsung 50" plasma wireless Logitech Corsair 650W Thermaltake 
MouseMouse PadAudio
wireless Logitech Steelseries Onboard - 2x2.1 Logitech speakers 
  hide details  
Reply
post #9 of 9
The difference between your kits is "XL" being from Ripjaws-X family and "RL" being regular Ripjaws.
Obviously, your kits have different production dates and therefore are most likely based on different ICs.
Overclocking is a lottery, you are never guaranteed frequencies beyond stock so, sometimes you are lucky, sometimes not.

Even DDR3-2600+ stuff is shown as "PC3-10700" in CPU-Z, as long as the XMP (which is also frequently misread by CPU-Z) shows correct specs, there is no reason to panic.
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