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4 x 1gb OCZ SLi PC8500

post #1 of 4
Thread Starter 
Hey guys, i recently upgraded my 2gb of the OCZ PC8500 SLi memory to 4gb.

It seems when running all 4 DIMM's my mobo does not recognise the EPP profiles and means i have to manually set it to 1066Mhz.

The problem is, its not running as stable as it should be for something that is effectively "stock settings". It seems that i can't increase the voltages too much either without see the error message 4g or something appear on my motherboards LED.

Anybody know how to get around this?

Kinda feels that it woulda been easier, and cheaper to just buy a 2x2gb kit.

Cheers
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.6GHz XFX NForce 680i GTX 570 Twin FrozR 3 4GB OCZ PC2-8500 @ 1066Mhz SLI 5-5-5-15 
Hard DrivePowerCase
2 x 250Gb @ 7200Rpm Raid 0 Jeantech Storm 700W NZXT Phantom 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.6GHz XFX NForce 680i GTX 570 Twin FrozR 3 4GB OCZ PC2-8500 @ 1066Mhz SLI 5-5-5-15 
Hard DrivePowerCase
2 x 250Gb @ 7200Rpm Raid 0 Jeantech Storm 700W NZXT Phantom 
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post #2 of 4
a memory kit is rated to run at stock settings when they're the ONLY kit on the motherboard... if a 2x1GB kit is rated to run @ 1066 5-5-5-15, this does not always translate to 4x1GB of the same ram being capable of the same settings...

This is primarily because of the higher load on the northbridge/memory controller from having all the available slots filled... this issue could potentially be overcome by giving the NB and ram some more voltage

The problem could also stem from mixing single sided with double sided sticks - did you make sure that they are both single sided or both double sided?

You should also make sure that both kits are capable of the stock settings by themselves before using them in tandem... use memtest and Prime95 to test your rig at stock

If all else fails, phone up the manufacturer and complain
Edited by killa_concept - 6/9/08 at 11:37am
post #3 of 4
What you need to do first is put the new memory in the system and run memtest to make sure you didn't buy faulty sticks.

You might need to up the MCH or Northbridge voltage a tad above stock.
intel
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7 920 D0 4.2ghz with HT @ 1.275V Bios EVGA 3X SLI, 132-BL-E758-A1 2x XFX HD5870 in Crossfire 6gb 3x2gb Corsair XMS3 1600mhz @ 7-7-7-20 
Hard DriveOptical DriveOSMonitor
3x WD 640gb AALS Raid 0 22x Samsung SATA DVD-RW Windows 7 Dell 3008wfp IPS 
KeyboardPowerCaseMouse
Logitech G19 Corsair 850TX, 70A on a single 12v rail!! Corsair 800D Logitech G500 
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intel
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7 920 D0 4.2ghz with HT @ 1.275V Bios EVGA 3X SLI, 132-BL-E758-A1 2x XFX HD5870 in Crossfire 6gb 3x2gb Corsair XMS3 1600mhz @ 7-7-7-20 
Hard DriveOptical DriveOSMonitor
3x WD 640gb AALS Raid 0 22x Samsung SATA DVD-RW Windows 7 Dell 3008wfp IPS 
KeyboardPowerCaseMouse
Logitech G19 Corsair 850TX, 70A on a single 12v rail!! Corsair 800D Logitech G500 
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post #4 of 4
Also, when testing your new memory sticks under memtest, first test them with everything at stock speeds and timings.

After you complete at least 1 full pass without errors, then you can start tweaking for better performance...
Gutted
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 4GHz 1.26V Asus Rampage Formula X38 0403 2x Diamond Radeon HD3870 Crossfire G.Skill DDR2-PC8000 2x2GB 
Hard DriveOptical DriveOSMonitor
2xWD Caviar 500GB RAID0 Lite-ON DVDRW Vista Ultimate x64 HP w2207 
PowerCase
Thermaltake 600W Ultra Grid 
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Gutted
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 4GHz 1.26V Asus Rampage Formula X38 0403 2x Diamond Radeon HD3870 Crossfire G.Skill DDR2-PC8000 2x2GB 
Hard DriveOptical DriveOSMonitor
2xWD Caviar 500GB RAID0 Lite-ON DVDRW Vista Ultimate x64 HP w2207 
PowerCase
Thermaltake 600W Ultra Grid 
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