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RAM tRFC timing mismatch and only 3.24 gb of 4gb RAM usable ...

post #1 of 4
Thread Starter 
Hallo everyone..


I previously had two 1gb sticks.Both are 667Mhz DDR2.I recently tried adding two more sticks both are DDR2 667Mhz.But my pc won't boot and cycle through instant power on off

I tried adding one stick at a time and found out that one of the sticks had higher tRFC than the other three (44 insted of 36).If put in a separate channel the higher tRFC ram works fine but pulls the tRFC of other two to 44,the system runs fine though.

It seemd that tRFC was the problem.I thought of changing the tRFC of the stick to 36 but my motherboard (DG33FB) bios have only settings for tRCD,tRP & tRAS. And as i have no idea about ram timings i don't know how to set them

Is there any solutions to my problem? or should I just be happy with three gigs of ram...If that's the case then which stick should I use the tRFC 44 one or the 36 one

I attached some CPU-Z screenshots.Please take a look

392392
392392
Edited by DEADMASK - 3/5/12 at 11:29pm
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post #2 of 4
Thread Starter 
Ok I got it working.I tried switching around the sticks before but they didn't work, this time i tried all possible combinations and this one worked. thumb.gif
237

But I got a different problem.My usable RAM only shows as 3.24 GB of 4GB:mad:.I'm using windows 7 32 bit and googling the issue tells me the 32bit OS is the problem.Is upgrading to 64bit is the only solution? I don't wanna go through the process of re-installing all mu drivers and software.
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CPUMotherboardGraphicsRAM
Core 2 Duo E4500 @ 2.2GHz INTEL DG33FB GeForce 9400GT Zion 4GB DDR2 @667MHz 
Hard DriveOptical DriveOSPower
Seagate Sata @7200rpm LG 20x DVD Writer Windows 7 Home Premium 64 Bit 450W Frontech 
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My System
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CPUMotherboardGraphicsRAM
Core 2 Duo E4500 @ 2.2GHz INTEL DG33FB GeForce 9400GT Zion 4GB DDR2 @667MHz 
Hard DriveOptical DriveOSPower
Seagate Sata @7200rpm LG 20x DVD Writer Windows 7 Home Premium 64 Bit 450W Frontech 
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post #3 of 4
Yes, 64-bit is the only way to access more then 3.24GB or ram.

As for the timings, I bet you could get the new stick to run at tRFC 36 if you wanted to and the board supports RAM tweaking. If not, and you don't want to upgrade to 64-bit, then think if the extra 240MB you get out of that stick is worth what you payed.
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post #4 of 4
Thread Starter 
No my motherboard does not support tRFC tweaking but it set all the tRFC to 44 automatically.Hope it won't affect stability.As for the usable RAM problem I tried a PAE patch It did make all 4GB available thumb.gif but I have some problems like games crashing and black screen videos.
So decided to upgrade to 64bit but the only problem is the HUGE backup I have to do redface.gif
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E4500 @ 2.2GHz INTEL DG33FB GeForce 9400GT Zion 4GB DDR2 @667MHz 
Hard DriveOptical DriveOSPower
Seagate Sata @7200rpm LG 20x DVD Writer Windows 7 Home Premium 64 Bit 450W Frontech 
  hide details  
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E4500 @ 2.2GHz INTEL DG33FB GeForce 9400GT Zion 4GB DDR2 @667MHz 
Hard DriveOptical DriveOSPower
Seagate Sata @7200rpm LG 20x DVD Writer Windows 7 Home Premium 64 Bit 450W Frontech 
  hide details  
Reply
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