Originally Posted by chrisjames61
This man knows his stuff about undervolting and running a FX cpu on less than stellar boards.
Let's put it this way. I am not after extreme performance. Up to 4Ghz is plenty for me and i am conservative user, as i leave computers often encoding while i am away and i don't want to think that something has gone on fire (reason why i never buy MSI, as at least Asrock has good throttling). When i was running the FX6300 on the Asrock 970 Extreme3 it was OK (i still run it on that). When i put the 8320 on the board, despite the undervolting, i couldn't help myself feeling it was just wrong. It's the first time i "felt" like psychological oppression because of a motherboard. At the end, it was what pushed me to buy 3x 8+2 phase motherboards (of which i use only 1 for now).
When i see temperatures above 60C, i go bananas. I saw such temperatures at late September i think, where ambient was pretty low. If i had tried it during summer, it would be certainly higher. It's not a bad board, it's very stable, mosfets never passed 60C (although i had top down cooler), but it was just feeling wrong... Seeing at the killawatt sucking 220W from the wall and the socket temp rising like a bullet, was feeling wrong. The socket temp is also very sensible to ambient temp, but even in winter, the motherboard just can't stay cool. And if you add the fact that it has thin PCB, it's bending easily, it's not exactly full ATX (it's like "almost full ATX"), it just feels wrong... Add the fact that in statistics i posted before, it has very high RMA rates (althouth it sports NXP mosfets, which aren't trash, but budget overclockers buy them and push them too hard):
Four models had return rates of over 5%ASRock 970 Extreme3 - 7.05%
MSI X79A-GD45 - 6.19%
ASRock 990FX Extreme3 - 6.08%
ASRock 970 Pro3 - 6.06%Source: DGX Tech - Hardware News and Reviews
http://dgxtech.com/hardware-failure-rates-2013-h2So Asrock comes back with a vengeance and releases the extreme3 R2.0 (which is virtually the same, with 1-2 more capacitors):
(and unfortunately i bought one of these too). And here's the "improvement":
And here it is for AM3 + motherboards based on AMD 990FX chipset, 990X and 970.
- ASRock 970 Extreme3 7.25% R2.0
- 5.95% 970 ASRock Pro3 R2.0
- 5.56% Gigabyte GA-990XA-UD3
- ASRock 990FX Extreme3 5.26%
- 3.31% ASUS Crosshair V Formula Z
- ASRock 970 Extreme4 3.60%
- ASUS M5A97 EVO 2.14% R2.0
- 1.82% Gigabyte GA-970A-DS3P
- ASUS SABERTOOTH 990FX 1.71% R2.0
Now, knock on wood, my boards keep running fine. But they run fine, because i don't push them to their limits. And...i undervolt.
These boards due to the misleading "extreme" label, were sold a LOT in Europe to budget overclockers. That's how they got that RMA numbers. The only extreme thing is Asrock's marketing. It's not made to overclock FX 8 core.
Checked a bit my archives. These are the BIOS values to use as starters. Now undervolting is like overclocking. Different chips undervolt differently, so they may not be 100% stable, but they are a good starting point. You need to stress test yourself:For 3.5Ghz
, use in BIOS : 1.125v (inside windows, you should aim for something like 1.17v-1.18v)For 4Ghz
, use in BIOS: 1.2v (inside windows, you should aim for something like 1.26-1.27v).
If you don't pass the stress test, raise one notch in BIOS and repeat test.
Important again: DISABLE LLC
! The motherboard with FX is crazy if you keep it enabled! It overshoots like crazy! I have set something like 1.25 and it was giving like 1.46v.
Also, when i passed from 1090T to 6300, i don't remember exactly what, but Windows 7 was out of whack on this motherboard. At the end i had to clear CMOS and install windows from scratch, despite the drivers being the same. Just a warning.
P.S.: Passing to Gigabyte 970 UD3P was like night and day. Although Gigabyte has horrible UEFI.Edited by Undervolter - 7/4/15 at 10:18am