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Special RAM needed for i7 2600k/P67?

post #1 of 4
Thread Starter 
What is it I'm hearing about special memory is needed for the new SB+P67 combo? Something about 1.5v or 2000Mhz?

I'm getting Corsair 4GB 1600/CL7(7-8-7-20) XMS3, for the record.
My System
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CPUMotherboardGraphicsRAM
i7 2600k P8P67 Deluxe eVGA GTX 580 A-Data 4GB DD3 1600/CL7 X 
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Crucial C300 64GB / WD Caviar Black 1TB Win7 Ultimate 64 Corsair AX850W HAF 932 
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My System
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CPUMotherboardGraphicsRAM
i7 2600k P8P67 Deluxe eVGA GTX 580 A-Data 4GB DD3 1600/CL7 X 
Hard DriveOSPowerCase
Crucial C300 64GB / WD Caviar Black 1TB Win7 Ultimate 64 Corsair AX850W HAF 932 
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post #2 of 4
You're hearing weird things.

That RAM will work just fine.
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Intellect v2
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Intel Core i7-6700K Processor ASUS ROG MAXIMUS VIII HERO LGA1151 DDR4 M.2 SAT... EVGA GTX 1080 SC ACX 3.0 Crucial Ballistix Sport 32GB DDR4 2400 MT/s (PC... 
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post #3 of 4
Hopefully these resources can help out.

Quote:
Originally Posted by Sanko@lowyat

Quote:
Originally Posted by sxs112@XS
We have talked about previously that BCLK maximizing also maximizes the RAM frequency, and all Sandybridge CPUs support up to DDRIII-2133 DRAM Ratio when been used with P67 chipset regardless if it is a K or not. (A 21.33 x BCLK Ram speed in other words) Other ratios including the 1866 (18.66xBCLK), 1600 (16xBCLK), 1333 (13.33x BCLK) and lower are also available for your pick when needed.

Therefore if you have a set of RAM that can only do 2000MHz and not more, you will have to adjust your BCLK / DRAM Ratio to try to hit as close to this sweet spot as possible. In this case, either 107.2 BCLK with 1866 DRAM Ratio OR 93.7 BCLK with 2133 DRAM Ratio are both ideal choices. For some who may feel disgusted with under-clocking their PCIE (though real world performance difference can be questionable) let us just focus on 107.2 for this example if the CPU boots with this BCLK, considering the BCLK limit DEPENDS 90% on CPU and 10% on the motherboard.

Back on with our walkthrough, now keep the Vcore that you have set previously (Probably 1.40v to 1.50v region), and try to lower the CPU Turbo Ratio to 36x and try to raise the BCLK to a bootable state that is not to surpass the ability of your RAM. You can try going by 0.2MHz steps to speed things up (Yes, you are right, most P67 based motherboards allow BCLK adjustments of 0.1MHz in each step).

Once you have found your Max BCLK, you can now go back and find your MAX CPU Speed by going with 48X and increasing BCLK till it crashes. In this case you should expect to reach something like 4850MHz! This is then the best performance you can squeeze out of your CPU that you should try to target. Finally, set your configuration to the configuration best suit the top performance you have found a minute ago, i.e. 45 X 107.2MHz with 1866 DRAM Ratio (i.e. 4824MHz@DDRIII-2000)
Source(s): http://forum.lowyat.net/topic/1705375 | http://www.xtremesystems.org/forums/...d.php?t=264300
Z77DEFINE
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X120E
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i7-2600K ASRock Z77 Professional-M ASUS ENGTX570 DCII 16GB (2x8GB) G.SKILL 16GBXL 
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840 Pro 256GB | 2xWD VR 300 RAID0 Antec KÜHLER H2O 620 P/P Windows 8.1 Professional x64 2x HP 30" S-IPS LCD ZR30w 
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AMD FX-6300 Vishera 3.5GHz (4.1GHz Turbo) ASRock 970 EXTREME4 AM3+ AMD 970 16GB (2 x 8GB) Kingston HyperX DDR3 1600 (KHX16... TBD 
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Corsair H50 w/PP PWM Fans VMware vSphere ESXi 5.1 Nas4Free Debian 
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WHS 2011 CORSAIR CMPSU-400CX 400W ATX12V V2.2 80 PLUS NZXT SOURCE 220 
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AMD Fusion Processor E-350 1.6Ghz AMD Radeon HD 6310 2 GB DDR3 Zalman S Series 64GB SSD 
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Z77DEFINE
(12 items)
 
220ESXi
(11 items)
 
X120E
(13 items)
 
CPUMotherboardGraphicsRAM
i7-2600K ASRock Z77 Professional-M ASUS ENGTX570 DCII 16GB (2x8GB) G.SKILL 16GBXL 
Hard DriveCoolingOSMonitor
840 Pro 256GB | 2xWD VR 300 RAID0 Antec KÜHLER H2O 620 P/P Windows 8.1 Professional x64 2x HP 30" S-IPS LCD ZR30w 
KeyboardPowerCaseMouse
Logitech G15 Corsair Pro Series Gold AX850 Fractal Design Define Mini Logitech G9x 
CPUMotherboardRAMHard Drive
AMD FX-6300 Vishera 3.5GHz (4.1GHz Turbo) ASRock 970 EXTREME4 AM3+ AMD 970 16GB (2 x 8GB) Kingston HyperX DDR3 1600 (KHX16... TBD 
CoolingOSOSOS
Corsair H50 w/PP PWM Fans VMware vSphere ESXi 5.1 Nas4Free Debian 
OSPowerCase
WHS 2011 CORSAIR CMPSU-400CX 400W ATX12V V2.2 80 PLUS NZXT SOURCE 220 
CPUGraphicsRAMHard Drive
AMD Fusion Processor E-350 1.6Ghz AMD Radeon HD 6310 2 GB DDR3 Zalman S Series 64GB SSD 
OSMonitor
Windows 7 Professional x64 11.6" HD (1366x768) AntiGlare 
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post #4 of 4
Quote:
Originally Posted by nekon View Post
Having to futz with your BCLK +/-10% (to get your RAM to run as rated) on Sandy seems like a REALLY bad idea given how the BCLK is now the timer for everything on the motherboard.
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Ugly 
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DD Boxen
(23 items)
 
   
CPUMotherboardGraphicsRAM
Intel Xeon E3-1230 Asus Maximus IV Gene-Z/Gen3 Powercolor 6970 2GB G. Skill 1600mHz Ripjaws 
Hard DriveOptical DriveCoolingCooling
SpinpontF3 1TB, WD 250, and WD320 Lite-On DT Waterblocks DT5Noz Waterblock Swiftech Komodo 6900-1 Waterblock 
CoolingCoolingCoolingOS
Swiftech MCR-220 Drive radiator Swiftech MCR-220 QP radiator 6xGentle Typhoon AP-15s Archx64 KDE4.5, Windows 7 x64 
MonitorKeyboardPowerCase
Eyefinity 3-head 5265x1050 OCN Ducky!! MX Blue Switches XFX 750W Black Edition Mountain Mods H2gO 
MouseAudioAudioAudio
Razer Naga Asus Xonar Essence STX Sennheiser 595 Sony STR-DE995 A/V receiver 
OtherOther
Lian Li Card flash memory reader Asus PCE-N15 Wifi-N card 
CPUMotherboardGraphicsRAM
AMD 1055T Gigabyte 790 Sapphire 4850x2 2x2GB 1600mHz 
Hard DriveOptical DriveOSKeyboard
A few Yes Vista/7 Das Keyboard 
Power
Ugly 
CPUMotherboardGraphicsRAM
Qualcomm Snapdragon APQ8060 1.2 GHz Something kinda small Qualcomm Adreno core 16GB 
Hard DriveOptical DriveOSMonitor
None N/A WebOS 3.0.2 9.7" XGA, multitouch 
PowerCase
6300mAh Piano Black 
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