overclocking a fx8350 with a gigabyte 990fxa ud3 ref 1.2

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chris78

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I currently have a amd fx8350 @ 4.0ghz, bit I wanna overclock a little. I have the gigabyte 990fxa ud3 ref 1.2, is this a good board to overclock and how would I go about it?
 
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bartholomew

bartholomew

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This guide should help you understand how bulldozer/piledriver CPUs Overclock.
http://www.overclock.net/t/1348623/amd-bulldozer-and-piledriver-overclocking-guide-asus-motherboard
Sin0822's guide should help you out since he uses a gigabyte board.
http://www.overclock.net/t/1140459/bulldozer-overclocking-guide-performance-scaling-charts-max-ocs-ln2-results-coming

I'm not sure if rev 1.2 has llc or not.
Just keep in mind that he LLC setting on gigabyte boards work differently compared to ASUS.

By KyadCK : Alright, I promised I'd explain why VBoost is better then VDroop and how Gigabyte handles LLC on at least the UD3, so here we go. (This is based on the latest BIOS)

Many of you probably know that it takes less voltage to do normal tasks with an OC then it does for long-therm stressing. Fairly known fact, suicide runs are done the same way. We also use Cool'n'Quiet to reduce power usage when the computer isn't in use, but it's not very effective for "normal" use where it puts us up to full speed and voltage anyway.

Gigabyte's most recent BIOS, for me, has LLC working this way:

AUTO: Whatever your board decides on... I have no idea what it wants to do sometimes, seems random.
Regular: Keep voltage steady.
Medium: +.025v
High: +.05v
Very High: +.075v
Extreme: +.1v

I'll use my chip at 5Ghz for this example.

When I'm just doing normal things like web browsing, I can be stable forever on just 1.5v. However, when I'm playing a game, I'll need 1.525-1.536v. When I'm stressing with IBT, I'll need 1.55-1.56v. Knowing this, my best LLC choice would be "High", to add up-to .05v under maximum load. It won't boost that high all the time, or even most of the time, but when I do need it, it's there. Normal overclocking would have me riding at 1.55v all the time, but this way I can allow less voltage to go through the CPU when I need it less, like an overclocker's version of C'n'Q.

The idea is to find the offset between full-load voltage and normal use voltage and adjust accordingly. Makes Overclocking more complicated by adding in another factor, but if you use it right, it can pay off. These chips draw a lot of power under load, this can make a fair dent in it.
Click to expand...

http://www.overclock.net/t/1318995/official-fx-8320-fx-8350-vishera-owners-club
 
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