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ram voltage on z68 question

post #1 of 5
Thread Starter 
yesterday started real OCing on new rig with old ram 2x2GB 1600 CL7 1.35V, set to 6-8-6-20-24-1T they needed up around 1.6125 on pII rig for that

cpu is at 1.35V and LLC lvl5 for 4.5GHz

tried 1.575V on ram, P95 blend, worker failed after 45min

left CPU the same and put ram to 1.59V, now I'm 9h10min into blend, CPU voltage is steady at 1.36V, and temps are great, average is about 55C across the 4 cores

Now but did I read that intel MBs don't like over 1.6V for ram??? and is there some other thing I'm supposed to adjust if using that much ram voltage????
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purifying flames
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Crucial M4 128GB sata3 24" 1080p XFX 750W XXX 80+silver 
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post #2 of 5
Keep the QPI/VTT voltage within .5V of the RAM voltage (1.1V in your case) and profit. Z68 and P67 boards can run 1.65V ram just fine, so running at 1.59V should be fine.
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post #3 of 5
Thread Starter 
reading another thread here I will try later to run them at stock CL7 and see if 1866 will work, then compare benches
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i5-2500k @ 4.6 GHz Gigabyte Z68XP-UD4 rev 1.0 sapphire 6950 2GB 4GB 1600 CL6 
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Crucial M4 128GB sata3 24" 1080p XFX 750W XXX 80+silver 
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i5-2500k @ 4.6 GHz Gigabyte Z68XP-UD4 rev 1.0 sapphire 6950 2GB 4GB 1600 CL6 
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Crucial M4 128GB sata3 24" 1080p XFX 750W XXX 80+silver 
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post #4 of 5
That ram seems pretty awesome with that speed and those timings. Any chance of sharing your secrets?

If it's at all affordable, I'd probably pick up 4x2gb.

This Vengeance refuses to go past 9-9-9-24 1t at 1600 and P95 fails at 11-11-11-31 2t at 1866. A tad disappointing.
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CPUMotherboardGraphicsRAM
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Maxkeyboards x8 Purple Corsair AX1200i Enthoo Primo SE (Red) Logitech G502 
Mouse PadAudio
Desk TiHD + DT770Pro/250 +LDMkII 
CPUMotherboardGraphicsRAM
Phenom II X4 960T Zosma @ X6 ASUS M4A88T-M Sapphire HD 6870 G.SKILL Sniper LV 1600 
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Teatime
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Epic $620 Build
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CPUMotherboardGraphicsRAM
6700k Z170 Classified OG Titan x2 Trident V 3000 16gb 
Hard DriveCoolingOSMonitor
SM951 512 + 840Pro 256 + others Raystorm, PMP-500, EK-FCTitan x2, 10 fans of rad Win10 Pro x64  Multi ASUS PB278Q / 85Hz 
KeyboardPowerCaseMouse
Maxkeyboards x8 Purple Corsair AX1200i Enthoo Primo SE (Red) Logitech G502 
Mouse PadAudio
Desk TiHD + DT770Pro/250 +LDMkII 
CPUMotherboardGraphicsRAM
Phenom II X4 960T Zosma @ X6 ASUS M4A88T-M Sapphire HD 6870 G.SKILL Sniper LV 1600 
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WD Caviar Green 1TB Some LG Thing Hyper 212+ Win 7 Pro x64 
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post #5 of 5
no need to keep vccio/vtt within .5v delta from vdimm. It's not x58 and does not require to follow such parameters. Increasing vccio is beneficial when all DIMM slots are populated or when you are using higher density modules.

1.65v is fine like MKHunt says
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Intel Core i7-6700K 8M Skylake Quad-Core 4.0 G... ASUS ROG MAXIMUS VIII EXTREME LGA 1151 Intel Z1... 3x MSI GeForce GTX 1080 Founders Edition  2x [Trident Z] F4-3600C16D-16GTZKW 16-16-16-36... 
Hard DriveHard DriveOptical DriveOptical Drive
Plextor M8Pe AIC 1TB PCI-Express 3.0 x4 MLC Int... Plextor M8Pe AIC 1TB PCI-Express 3.0 x4 MLC Int... LG BH16NS40 Blu-ray Card Reader: Rosewill RDCR-11003 - 3.5" 74-in-1... 
CoolingOSMonitorKeyboard
Custom Ultra cool passive heatsink Microsoft Windows 10 Pro 64-bit ViewSonic XG2703-GS Black 27" 4ms (GTG) IPS G-S... Das Keyboard 4 Professional Mechanical Keyboard 
PowerCaseMouseMouse Pad
CORSAIR AXi Series AX1500i Digital 1500W 80 PLU... Corsair Obsidian 750D Black Aluminum / Steel AT... Logitech G900 Chaos Spectrum Logitech 
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onboard Canon i-SENSYS LBP7680Cx (5089B014) Duplex 9600... Canon imageFORMULA DR-F120 (9017B002) 600 dpi U... Brother Personal Plain Paper Fax Machine, FAX-575 
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