F3-12800CL9D-4GBNQ and BSOD's

[jallen9]

My initial setup was with 4gb ram. Everything has been solid for over a year. I recently added 4 more gig of memory, using the exact same type (F3-12800CL9D-4GBNQ) and now I am getting random BSOD's. I ran memtest for 12 hours with no issues. What settings should I be using in the BIOS to make this memory more stable?

Here is my setup:

-Gigabyte MA790GPT-UD3H MB
-GSkill G.SKILL 8GB (4 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (F3-12800CL9D-4GBNQ)
-AMD Phenom II X3 720 2.8GHz Socket AM3 95W

Memory running at 1333 8-8-8-24-2T (default 9-9-9)
DDR voltage: 1.65 (default 1.6)
NB Voltage 1.4 (default 1.3)

I adjusted the memory settings above based on threads I have read here, but I am still getting BSOD's and errors in Prime95 blend. What else can I try?

[Tradesman]

Have you tried adding voltage to the CPU and/or the MC

[jallen9]

Have you tried adding voltage to the CPU and/or the MC

I have not no. I assume MC is the memory controller? Is that the same as the CPU-NB? What do you suggest?
I am also a bit confused by NB vs CPU-NB. I adjusted the NB, but maybe I am supposed to be adjusting the CPU-NB instead? I am not really an experienced OC'r.
Thanks for the help.

[jallen9]

Here is a little more info.
When I first installed the new memory, I didn't adjust any of the bios settings, which were set at the default 1333 9-9-9-24-2T. These are the settings I have been running the initial 4gb with absolutely no issues for the last year. After installing the additional 4gb I started having freezing and bsod's within the first 30 minutes. It would average about 3 crashes per day. I immediately ran memtest 4.10 for a full 12 hours and did not get any errors.

I upgraded the bios to the latest F4j version, and the bsod's stopped for a few days. I thought that solved the problem, but after 3 days I got another one. So the latest bios seemed to help, but not completely solve the problem. I am able to run memtest and prime95 without any reported errors with the latest bios and the default settings.

Thats when I started researching it more and trying to adjust the memory timing/voltages.
One thing I have noticed is that any of the tweaked settings I have tried cause prime95 blend to start failing, when it works fine with the defaults.
Hope that helps.

[Tradesman]

Is the 720 unlocked? Check the Command Rate (CR) will want 2N. tRFC should prob be at least 160, will want to raise the CPU-NB a bit. If this doesn't do it, if you could pls post your BIOS Settings

[jallen9]

Is the 720 unlocked? Check the Command Rate (CR) will want 2N. tRFC should prob be at least 160, will want to raise the CPU-NB a bit. If this doesn't do it, if you could pls post your BIOS Settings

The cpu is not unlocked, just running the stock 3 cores. CR is currently set to 2T. trFc is 160. CPU-NB is currently 1.2v. What should I raise it to?

[Tradesman]

Try 1.3 on the CPU-NB, also add .05 to the CPU

[jallen9]

I am going to make those changes now. What is the best was to post the bios settings?

[Tradesman]

Most take pictures of the bios screens

[GSKILL TECH]

DDR3-1600 9-9-9-24 1.50V, CPU-NB Voltage +0.1V

or

DDR3-1600 9-9-9-24 1.60V

or

DDR3-1333 8-8-8-24 1.50V

Thank you
GSKILL TECH