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Ram timings

I

Iowabucks

Limp Gawd
Joined
Sep 22, 2008
Messages
186
Hey everyone, I'm thinking about attempting my first overclock. I have an AMD Phenom 9950 BE CPU and by all the reading i have done so far it looks like it's a fairly straightforward and easy process compared to most CPU's

First i want to get my ram timings set manually. I'm running (2X2Gbs) Corsair Dominator PC28500 1066 DDR2 ram.

My computers specs:
Gigabyte GA-MA790GP-DS4H mobo - bios version F4
AMD Phenom 9950 Black Edition 125W
Nvidea GTX 260
Sound Blaster X-FI Elite Pro
Corsair Dominator DDRII 4090 MB 1066
Seagate Barracuda 7200.11 500GB HD
Zalman CNPS9700 CPU cooler
Enermax Liberty 620W PSU

(1.) In bios with the RAM still in default mode the mobo has the timings at 5-7-7-24. Corsair recommends 5-5-5-15-2T. Can i change these and voltage to 2.1v without making the computer unstable? With this affect the stability at all?

(2.) Also, in post and other places i see the memory is set at 1066MHz, but CPU-Z reports it running at 535.8MHz. is this normal? Why isn't it reading 1066MHz?

After building this computer it read 1066 in post for almost a year, then one day it read a much lower number (can't even remember what it was now). After talking to many people i found i needed to up the voltage just a hair and it came back to 1066. Can anyone explain this to me? Will it affect my OC at all?

Thganks, Jerry.
 
If they're rated for 5-5-5-15, then run them at that with the proper voltage. If it becomes unstable, then RMA the ram as it's not working as advertise. Also, the RAM is DDR2, which means it has a baseclock of 533, but since it transmits at both the up and down cycle it's rated for 1066. Different programs report the speed different, but as long as it reads close to either 1066 or 533 it's right. It might fluctuate a few MHZ, but it's normal.

As for needing more voltage to run at these speeds now, they're electronics. That means they degrade over time and will require more voltage than before to be stable. The same thing happens to CPUs and GPUs as they age. If you have to pump significantly more voltage, then it's going bad and you should replace them before it causes data corruption.
 
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