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4x2GB RAM = Unstable Overclock?

post #1 of 19
Thread Starter 
I recently added another 2x2GB sticks of G.Skill to my sig rig making a total of 8GBs of RAM. I'm running Vista Ultimate x64 and do a lot of design work so I thought I would take advantage of 8GBs of RAM. Well now I can't overclock my rig at all. When I had 2x2GBs of RAM installed I could get my CPU to 4.0Ghz with 1.5V. I understand that having all 4 memory slots full puts more stress on the system, but would it really prevent me from even a small oc? I even tried overclocking my CPU to 3.0Ghz with 1.5V with no success. I hate to think that the extra RAM is actually hurting my system. I could also run 2x2GB of ram at 4-4-4-12, now with 4x2GB I have to run at stock 5-5-5-15. Kinda disappointed, unless I'm doing something wrong. Advice please.
post #2 of 19
Try the new ram alone in the system.

It might be defective.
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Oh The Glorrryyy
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post #3 of 19
Thread Starter 
Ran Memtest, everything seems fine.
post #4 of 19
0.o, this has nothing to do with your proble, i truly have no clue,
But why do u need 8gb?
    
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post #5 of 19
Have you touched the NB Voltage yet? You may have to turn it up a couple notches. The Memory controller for Intel is on the motherboard (on the CPU for AMD) so the CPU shouldn't be affected. However, the NB or something on the motherboard may be showing extra stress with 4 Sticks. I would bump the NB Voltage up a notch or 2 and see if that helps at all.
    
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post #6 of 19
Thread Starter 
I have increased the volts for the NB to 1.5v. Still unstable.
post #7 of 19
Quote:
Originally Posted by pow3rtr1p View Post
Have you touched the NB Voltage yet? You may have to turn it up a couple notches. The Memory controller for Intel is on the motherboard (on the CPU for AMD) so the CPU shouldn't be affected. However, the NB or something on the motherboard may be showing extra stress with 4 Sticks. I would bump the NB Voltage up a notch or 2 and see if that helps at all.
If pow3rtr1p's suggestion doesn't work you may also have to play around with the sub-timings a bit.

EDIT: Try setting tRFC to 52. I read somewhere GSkill recommends that setting when using 4 sticks
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post #8 of 19
Quote:
Originally Posted by Iceman0803 View Post
If pow3rtr1p's suggestion doesn't work you may also have to play around with the sub-timings a bit.

EDIT: Try setting tRFC to 52. I read somewhere GSkill recommends that setting when using 4 sticks
Obscure knowledge FTW! lol
    
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post #9 of 19
Quote:
Originally Posted by pow3rtr1p View Post
Obscure knowledge FTW! lol
LOl I've been trying to remerber where I saw it so I can provide a link but for the life of me I can't.
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Black Ice
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post #10 of 19
Here are the voltages someone on the eVGA forums used to get 8GB working. Obviously leave the CPU where it's at, and perhaps raise the RAM Voltages if yours are higher than that at stock..

cpu: 1.375
mem: 2.075
fsb: 1.2
ht: 1.2
pci-e: 1.4
nforce 1.5
aux: 1.5
    
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CPUMotherboardGraphicsRAM
i7 4790k @ 4.7GHz Asus Z97 Pro Gaming EVGA 1080 Ti FTW3 @ 2050 MHz 32GB G Skill Sniper DDR3-2133 
Hard DriveHard DriveHard DriveOptical Drive
Intel 600p m.2 512GB Crucial M500 SSD 960GB Toshiba X300 HDD 3TB LG Blu Ray Burner 
CoolingOSMonitorMonitor
Cooler Master Nepton 240m Windows 10 Pro Samsung 34" Curved Ultrawide (3440x1440) Samsung 22" Portrait (1080x1920) 
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Poker II Cherry MX Brown, KBParadise V80 Cherry... EVGA G2 650W Cooler Master Silencio 652s Steelseries Sensei Wireless 
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