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Corsair Vengeance LP 4X4G, 1866Mhz 9-11-11-28 1.6 V vs 1600Mhz 9-9-9-24 1.53V

post #1 of 3
Thread Starter 
Hi, I was attempting to overclock my 4 sticks of Corsair Vengeance 4G DDR3-1600 Cas9 1.5V Ram on my ASRock Z77 Extreme 4 board, with all Timing set to Auto.

Command Rate in both cases is 2T

First My Ram would not pass Prime Blend at 1600 Mhz 9-9-9-24 @1.5V(I would get individual core failure yet no blue screen) though it would pass Memtest86+ v4.20 without problem, so I raised the Dram Voltage to 1.53V and run Prime Blend(1hr 45 min) and Prime Custom(1 hr) Torture(14G Ram used) , passed both.

I first tried to raise the XMP profile to DDR3-1866 with the voltage unchanged(1.53V), this failed Prime Blend in 4 min.
I upped the Voltage to 1.56V, this failed Prime Blend in a few mins as well.
I upped the Voltage to 1.6V(1866Mhz 9-11-11-28 1.6 V ), this passed 30 min of Prime Blend then I shut the test off

I tried to set the timing in Bios manually(from the auto 9-11-11-28) to 9-9-9-24, you probably know what happened, this stupid move caused my computer to auto shutoff during boot.

I pressed Clear CMOS button, rebooted and went back to DDR3-1600, 9-9-9-24 at 1.53V and all is well.

My questions:
1. how much extra performance do I gain at 1866Mhz 9-11-11-28 1.6 V vs 1600Mhz 9-9-9-24 1.53V? I don't mind being a min slower in video encoding but if it affects my gaming performance I might take the 1866Mhz.

2. Is the extra Dram Voltage an issue(I hear you are fine at anything below 1.65V, but the board allows a max of 1.8V)?

3. I plan on stress testing my OCed Ram with a longer Prime Blend & Prime Custom 14G Ram run(each for an hour) and a Memtest86+ run, is this sufficient and if not what else should I do to test my Ram.

4. I hear that not OCing your Ram reduces your CPU OC ceiling by about 200 Mhz, is this true?

p.s If you have experience OCing 4 sticks of Ram, how much could you push it? Do you recon I can push mine to 2100/2133 at 1.65V?
Edited by sherlock - 9/17/12 at 6:17am
post #2 of 3
I would say go with the lower latency and lower voltage one, the extra mhz to 1866 won't help very much
Power Edition
(18 items)
 
   
CPUMotherboardGraphicsRAM
i7 3610QM Clevo p151EMx Intel HM77 NVidia GTX 670m 16GB 1600Mhz DDR3 Samsung 4x4 
Hard DriveOptical DriveCoolingOS
Seagate Momentus 750GB 7200 RPM 16MB Cache TSSTcorp CDDVDW SN-208AB Sager NP9130 Internal Fans Windows 7 Ultimate 64 bit 
MonitorKeyboardPowerCase
15.6” 1920x1080 LED-Backlit Display Matte Finish Sager NP9130 Keyboard 8 Cell Smart Lithium-Ion Battery 76.96Wh Sager NP9130 
MouseAudio
Touchpad or Logitech G5 Onkyo Installed Speakers 
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Power Edition
(18 items)
 
   
CPUMotherboardGraphicsRAM
i7 3610QM Clevo p151EMx Intel HM77 NVidia GTX 670m 16GB 1600Mhz DDR3 Samsung 4x4 
Hard DriveOptical DriveCoolingOS
Seagate Momentus 750GB 7200 RPM 16MB Cache TSSTcorp CDDVDW SN-208AB Sager NP9130 Internal Fans Windows 7 Ultimate 64 bit 
MonitorKeyboardPowerCase
15.6” 1920x1080 LED-Backlit Display Matte Finish Sager NP9130 Keyboard 8 Cell Smart Lithium-Ion Battery 76.96Wh Sager NP9130 
MouseAudio
Touchpad or Logitech G5 Onkyo Installed Speakers 
  hide details  
Reply
post #3 of 3
Thread Starter 
Quote:
Originally Posted by ShotgunBFFL View Post

I would say go with the lower latency and lower voltage one, the extra mhz to 1866 won't help very much

Could I get the Rams to stabilize at a lower timing with more voltage(say 1.65V)?
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