Gigabyte GA-EP45-UD3R Mobo Question


Nov 14, 2008
Base on the review at Newegg this mobo is very good for overclocking however I don't see any thread in this forum dicussing about this mobo. So I have to stop by and ask a few question.
I'm a newbie and this is my first attempt to overclock so bare with me.

My setup is

Mobo: Gigabyte GA-EP45-UD3R
CPU: Intel Q6600
Case: cooler master cosmos 1000
Video card: Sapphire Radeon 4850 512MB 256 bit DDR3
Memory: G.Skill 4gb ddr2
Hard drive: Seagate Barracuda 7200 750GB
Power Supply: Corsair 650W

I only want to overclock the cpu to 3.0ghz. due to the heating and stability issue of the cpu.

As for the bios setting I came across one of the user on another forum who has the following setting
Under MB Intelligent tweaker
Cpu host clock control: Enable
CPU Host Frequency: 333
PCI Express Frequency: 100
Sys. memory multiplier (SPD): 2.40
Sys. voltage control: Manual
CPU voltage control: 1.27500v

Can someone confirm if these setting are correct and if they have any success with it.
I hope I didn't leave anything out but if I did please feel me in.

Thanks in advance. Any suggestion is helpful.



Nov 16, 2008

I just bought this mobo and q6600 as well. This mobo is awesome.
Overclocking is VERY EASY , All you need is just increase the FSB from 266 to xxx. thats it.

I think the bios automatically adjust all other variables for you.

Thats all i did to OC mine to 3.4G....

I got fps increase in farCry2 from 33 to 48 fps, without VGA upgrade. :bounce:
Although I noticed Intel platform have more noticeable stuttering than AMD's, but FPS is much better on Intel....



Nov 23, 2008
I've just got this awesome motherboard last week. So far, I'm very pleased with the looks and performance. OC'ed my Q6600 to 3.2GHz without any difficulty....much easier to overclock than my old ASUS P5K mobo.

Intel C2Q Q6600 / Gigabyte EP45-UD3R / ASUS EN9800GTX+ / 4GB Kingston Hyper-X DDR2-1066 / 1TB WD HDD / Zalman CNPS-8700LED / Gigabyte Odin Pro 550W PSU


Feb 17, 2008

What worked out for you?

I have an almost identical system and while I love the MOBO features I'm actually having a tougher time OC my Q6600 with it than my last board and I can't figure out why. I was running contentedly at 3.2 GHz before and now I can't get past 2.7. All I have been doing is leaving the multiplier alone at 9 and incrementing the frequency but for some reason I'm hitting a wall at 300; everything I've tried above that results in alarm bells and a resetting the bios (which makes me a appreicate the quick bios recovery feature - 10 stored settings rocks).

I did try locking down the PCI bus at 100 but that is the default anyway.

I also did try working with the multiplier also with no success.

All suggestions appreciated!

Intel Q6600 Kentsfield
Gigabyte GA-EP45-UD3R
4 GB Kingson RAM DDR 2 800 5:5:5:18
Radeon HD 4670 (HIS)