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[Official] Gigabyte GA-990FXA-Series Owners Thread/Club - Page 252

post #2511 of 12377
Hi !

I have AMD FX 8120 and 990XA -UD3 i solding that in few days, and i want ask is good 990FXA-UD5 ? Does she have vDrop or overvolt, buggy stufs and other ? On Gigabyte web site i see just rev 1.x is there any new revision ?
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post #2512 of 12377
Quote:
Originally Posted by zvonexp View Post

Hi !
I have AMD FX 8120 and 990XA -UD3 i solding that in few days, and i want ask is good 990FXA-UD5 ? Does she have vDrop or overvolt, buggy stufs and other ? On Gigabyte web site i see just rev 1.x is there any new revision ?

from my reading the UD3 is the best bet. UD5 has more Vdroop, and possiblility for Vboost. and on here there seems to be more chatter about instability.
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post #2513 of 12377
Thq, mate,anybody else ?
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post #2514 of 12377
UD3 uses a classic VRM Power configuration, whereas the UD5 and UD7 use the new DrMOS config...

This by nature causes the UD5 and UD7 to suffer from VDroop and have to compensate with LLC (Load Line calibration) if supported by the board revision.

The UD3 on the other hand acts as boards we are used to, and Vboost voltage under load. Bios revisions impact by how much the voltage changes... but its much easier to close in a target voltage in doing so.

Personally, unless you absolutely need one of the features of the UD5 or UD7, I would stick with the UD3. Its a solid proven board with tech that isn't still being pioneered.

Having researched this before purchasing my UD3, I'm ten fold happier with my decision now that I've seen the difficulties people have (and are having) with the bigger brother boards.

All this aside, the UD3 provides the PERFECT PCIe port placement that I need / wanted. The UD3 is quite literally THE only 990fx board that provides its specific port layout.
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post #2515 of 12377
my UD5 board has a bunch of vdroop on vcore

Steve
Edited by bcudasteve - 1/16/12 at 3:03pm
post #2516 of 12377
Quote:
Originally Posted by bcudasteve View Post

I am running the UD5, have loads of vdroop
vcore in bios is 1.535
here is cpuz validation while running cinebench 11.5 64-bit
http://valid.canardpc.com/show_oc.php?id=2202019
notice the vdroop!
finally have it stable at ~ 4 GHz, 2800 NB - had to pump up the NB voltage to 1.4v
Steve

thumb.gif

Right ON!

This is what I've landed on:

289

That is full under load, with CnQ and C1E enabled @ 48c max temp with 8k Prime95 work units (cause the most heat i've seen).

24hr prime blend stable and boy does it scream. I love it.
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post #2517 of 12377
MadGoat,

Sorry, it's not quite stable yet!
during the test (cinebench) I ran showed 20x cpu clock with a little over 4 GHz in cpuz, then validation showed 13.5x at ~ 2.72 GHz, whats up with that?
also the vcore I had set at 1.535 in bios, to support 20x cpu clock ratio, NB volts at 1.4 to support NB @ 2800. Then the last 2 times I tried prime95, BSOD's again.

more tweaking, or is it the motherboard & cpu combo that's not working? I think i need a better processor.

Steve
Edited by bcudasteve - 1/17/12 at 3:03pm
post #2518 of 12377
your multiplier changing is normal for CnQ. (Cool and Quiet)

It will ramp up or down the clock speed dependent on processor use to save heat and power... C1E, when enabled, will further allow the cpu to adjust the voltages at those lowered clocks to further save power and heat. Both can be disabled in the bios... as many do to in the endless pursuit of the highest stable OC.

I however prefer to find the highest / best OC with both enabled. (saving power is a big bonus)
Edited by MadGoat - 1/16/12 at 3:57pm
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post #2519 of 12377
OK, new successful cpuz validation. 4.xx GHz @ 2600 NB
Reduced the cpu NB freq to 2600 @ 1.4v, increased the cpu vcore to 1.55v, vdroop goes down to 1.488!

http://valid.canardpc.com/show_oc.php?id=2202105

When just running prime95 & cpuz. If I run more programs, get BSODs!

Don't have cool & quiet enabled in bios.
post #2520 of 12377
Quote:
Originally Posted by MadGoat View Post

thumb.gif
Right ON!
This is what I've landed on:
289
That is full under load, with CnQ and C1E enabled @ 48c max temp with 8k Prime95 work units (cause the most heat i've seen).
24hr prime blend stable and boy does it scream. I love it.

MadGoat,

Those results are marvelous! I can see why you enjoy the UD3 so much.

Steve
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