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Asus M4A89GTD PRO/USB3 Overclocking

post #1 of 55
Thread Starter 
Hi, I'm running this Asus board with 95W 1055T and have hit a bit of a brick wall with my OC. So far the board is happy upto 295MHz but doesn't seem to want to go any higher. Definitely flaky at 300MHz. Is there a BIOS tweak to make it go higher?

I'm experimenting with the 1055T running as a tri-core at the moment, purely for gaming. This works very well, the CPU is totally stable @ 4130MHz. It needs just 1.425V and runs at a cool 50C under Prime95 stressing. So I think it could go a lot higher but the mobo seems to be the limiting factor. Any ideas to make it go higher?
post #2 of 55
A limiting factor. What?????
I was hitting 5.0ghz stable on quad cores a dice run and hitting 4.2ghz stable on a 1090T on air. It is on an Asus M4A89GTD PRO, which is the little brother of an Asus M4A89GTD PRO/USB3. The same mobo expect no USB 3.
post #3 of 55
Thread Starter 
Yeah, the board seems to be the limiting factor. My 1055T is multi-locked unlike your 1090T, so I rely solely on the board BCLK OC capability for max overclock.

How can I get the board higher than 295Mhz? Is there BIOS voltage tweak or something?
post #4 of 55
Quote:
Originally Posted by pswfps View Post
Yeah, the board seems to be the limiting factor. My 1055T is multi-locked unlike your 1090T, so I rely solely on the board BCLK OC capability for max overclock.

How can I get the board higher than 295Mhz? Is there BIOS voltage tweak or something?
Your limiting factor is your ram. Mine can hit 320mhz with A-Data DDR3 2000 run @ 1600. Not all ram can run on high FB.
post #5 of 55
Thread Starter 
No, it's not the RAM, I lowered the multi so that it was running @ less than stock speeds for testing the mobo. Same for CPU, CPU/NB and HT Link. So must be the mobo that's limited to 295MHz. Mine will boot 320Mhz but isn't Prime stable for more than a minute .Just wondered if there was a BIOS tweak?
Edited by pswfps - 11/29/10 at 2:12pm
post #6 of 55
Quote:
Originally Posted by pswfps View Post
No, it's not the RAM, I lowered the multi to less than stock for testing the mobo.
The ram speed is not a factor. Is the FB on the ram.
Example
A-Data DDR3 2000 needs to be oc with 250mhz (FB) to hit the speed of 2000, so this ram has a better higher FB clock base. Your FB base is 200mhz.
The higher the FB base on the ram. The higher overall ocing you will get, because it can handle high FB speed.
Edited by dixson01974 - 11/29/10 at 2:23pm
post #7 of 55
Thread Starter 
No mate, I was running the RAM well below spec, like DDR3 1200Mhz on stock volts so it's rock solid.
post #8 of 55
Quote:
Originally Posted by pswfps View Post
No mate, I was running the RAM well below spec, like DDR3 1200Mhz on stock volts so it's rock solid.
You can try bumping up the ram voltage. I was stable at 320mhz. I ran prime95 for 6 hours. I was on bios version 601, which is the first bios.
Edited by dixson01974 - 11/29/10 at 2:28pm
post #9 of 55
REMEMBER
When you are changing the CPU FB. You are ocing the ram, because it is not design to run on anything besides FB of 200mhz.
post #10 of 55
Thread Starter 
Do you mean the RAM bus between the IMC and DRAMs? At DDR 1200, it's running at 600MHz regardless of the BCLK speed. Well within spec and safe.
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