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Can I mix ram sets? (Socket 775)

post #1 of 5
Thread Starter 
Hey OCN,

I currently have 4 gigs of ram in my pc and I picked up an additional 4 gigs of ram to put into it. They are both 2x2 gig sets of Corsair XMS2, DDR2 800, 5-5-5-18 timing but they are different revisions. One defaults at 1.9V and the other at 1.8V, is it safe to mix these and keep the voltage at 1.9 or would it cause issues?

Motherboard Asus P5Q Pro Turbo
CPU Q9550
Treacherous Large
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Treacherous Large
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OCZ Agility 3 120 GB + 2x 1.5TB WD GReen's LG Xigmatek Dark knight Windows 7 ultimate X64 
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post #2 of 5
Should be fine running all the memory at 1.9v.
ENIAC
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post #3 of 5
Thread Starter 
Thanks
Treacherous Large
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CPUMotherboardGraphicsRAM
Q9550 ASUS P5Q Pro Turbo GTX 570 8 GB Corsair XMS2 800 
Hard DriveOptical DriveCoolingOS
OCZ Agility 3 120 GB + 2x 1.5TB WD GReen's LG Xigmatek Dark knight Windows 7 ultimate X64 
MonitorPowerCase
LG W2353V Corsair HX 620 CM Storm Sniper 
  hide details  
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Treacherous Large
(14 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 ASUS P5Q Pro Turbo GTX 570 8 GB Corsair XMS2 800 
Hard DriveOptical DriveCoolingOS
OCZ Agility 3 120 GB + 2x 1.5TB WD GReen's LG Xigmatek Dark knight Windows 7 ultimate X64 
MonitorPowerCase
LG W2353V Corsair HX 620 CM Storm Sniper 
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post #4 of 5
Quote:
Originally Posted by The Floyd Effect View Post

Thanks

I'm assuming you going to be using the memory in dual channel mode.
Make the new pair and the old pair are each in their own channel.
ENIAC
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MonitorKeyboardPowerCase
Yamakasi DS270 SE 27"  Logitech G110 Cooler master 700 Watt Cooler Master 690 II 
MouseMouse PadAudio
Logitech G500 My desk Audio-GD NFB-15.32 
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ENIAC
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Intel i5 7600k Asus M5A99FX Pro 2.0 AMD 470 8GB 16GB DDR3  
Hard DriveOptical DriveCoolingOS
Samsung EVO 500GB Lite-On Blu-ray Burner 4 case fans Win 7 Pro 64-bit 
MonitorKeyboardPowerCase
Yamakasi DS270 SE 27"  Logitech G110 Cooler master 700 Watt Cooler Master 690 II 
MouseMouse PadAudio
Logitech G500 My desk Audio-GD NFB-15.32 
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post #5 of 5
Quote:
Originally Posted by The Floyd Effect View Post

Hey OCN,

I currently have 4 gigs of ram in my pc and I picked up an additional 4 gigs of ram to put into it. They are both 2x2 gig sets of Corsair XMS2, DDR2 800, 5-5-5-18 timing but they are different revisions. One defaults at 1.9V and the other at 1.8V,
1.9V is perfectly safe for DDR2 because DDR2 chips have an absolute maximum rating of 2.35V, and some mobos don't even allow less than 1.95V, like the Socket 775 BioStar G41-M7. That mobo even allows setting the memory voltage to a chip-destroying 2.75V.

OTOH I doubt the rating of the chips on those Corsairs is actually 5-5-5-18 because I had five 1.8V pairs fail testing pretty fast, while all my Samsung/Crucial modules, rated 6-6-6-18, tested fine at 5-5-5-12.
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