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Lowering RAM Timings - What Are The Risks?

post #1 of 7
Thread Starter 
I have 4 x 2GB Sticks running @ 1333MHz and 9-9-9-24 and 1.5v. Those are my stock RAM settings and I have confirmed this in the BIOS as well.

I'm not interested in raising clock speeds, as 1333MHz is fine for me. I just wanna lower the timings.

I have them installed on this motherboard: Gigabyte GA-MA770T-UD3 (rev. 1.5).

Does lowering Timings mean Voltages must be increased as well?
Can I just lower the CAS Latency and leave everything as is?
What are the risks?

I already have my Phenom II X3 running at 4.1GHz. Now I'm interested in tweaking my RAM.
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CPUMotherboardGraphicsRAM
Phenom II X3 4.1GHz GA-MA770T-UD3 (rev. 1.5) HD 4850 1GB 625/993 8GB DDR3 1333MHz 
Hard DriveOptical DriveOSCase
250GB SATA CD/DVD Combo Drive Windows 7 64-Bit NZXT Gamma 
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CPUMotherboardGraphicsRAM
Phenom II X3 4.1GHz GA-MA770T-UD3 (rev. 1.5) HD 4850 1GB 625/993 8GB DDR3 1333MHz 
Hard DriveOptical DriveOSCase
250GB SATA CD/DVD Combo Drive Windows 7 64-Bit NZXT Gamma 
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post #2 of 7
Lowering the timings to much will mean your computer will not post. Thats about the only risk involved, no damage will occur to the components. Basically just do a trial and error. But after each unsuccessful post you will have to reset the BIOS either using the remove batter and switch jumper method or simply holding the power button for 10 seconds instead of the usual 4 seconds to reset the BIOS. the lowest i can see that type of ram going is possibly 7-7-7-22 and with modern motherboards expect to see many other Ram Timing settings that you will need to research. You will have to try alot of different settings before you find one that is stable, so expect to spend a few days figuring it all out and document every little change you make and make a note of the time (time-stamp it) so that you can easily find what works and what doesn't. Cheers!
Edited by jcrew3002 - 5/18/11 at 7:19pm
post #3 of 7
worst case, corrupt windows (repair/reinstall will fix)

on average, just bsod, crahses or freezes
reboot, tweak the timings again and restart

lower them one at a time til errors occur on prime95
be sure to write down which settings work and fail
post #4 of 7
Thread Starter 
Are any voltage increases necessary when lowering timings?
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CPUMotherboardGraphicsRAM
Phenom II X3 4.1GHz GA-MA770T-UD3 (rev. 1.5) HD 4850 1GB 625/993 8GB DDR3 1333MHz 
Hard DriveOptical DriveOSCase
250GB SATA CD/DVD Combo Drive Windows 7 64-Bit NZXT Gamma 
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Custom
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CPUMotherboardGraphicsRAM
Phenom II X3 4.1GHz GA-MA770T-UD3 (rev. 1.5) HD 4850 1GB 625/993 8GB DDR3 1333MHz 
Hard DriveOptical DriveOSCase
250GB SATA CD/DVD Combo Drive Windows 7 64-Bit NZXT Gamma 
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post #5 of 7
Thread Starter 
Quote:
Originally Posted by ffejrxx View Post
worst case, corrupt windows (repair/reinstall will fix)

on average, just bsod, crahses or freezes
reboot, tweak the timings again and restart

lower them one at a time til errors occur on prime95
be sure to write down which settings work and fail
So start at 9-9-9-24

Then do 8-9-9-24...test

Then do 8-8-9-24...test

Then do 8-8-8-24...test

etc...
Edited by Blom89 - 5/18/11 at 7:24pm
Custom
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X3 4.1GHz GA-MA770T-UD3 (rev. 1.5) HD 4850 1GB 625/993 8GB DDR3 1333MHz 
Hard DriveOptical DriveOSCase
250GB SATA CD/DVD Combo Drive Windows 7 64-Bit NZXT Gamma 
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Custom
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CPUMotherboardGraphicsRAM
Phenom II X3 4.1GHz GA-MA770T-UD3 (rev. 1.5) HD 4850 1GB 625/993 8GB DDR3 1333MHz 
Hard DriveOptical DriveOSCase
250GB SATA CD/DVD Combo Drive Windows 7 64-Bit NZXT Gamma 
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post #6 of 7
yep

try to keep the voltage at what the ram recommends, +.1 or 1.65max
post #7 of 7
The only risk is instability which can be fixed with a CMOS reset
With no heatspreaders 1.65V for safe max, with heatspreaders 1.725 (unless you know the ICs)
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