GA-990FXA-UD5 issues (need quick answers)

[derobert]

Hi i have questions about this board:

i have no hard drive or anything connected on this port. Bios shows "NONE" but in preferences there is "Capacity 136GB", why?


Under Ctrl+F1 advanced chipset menu i have this option GPP Core CFG, what is it for?

[F5BJR]

Look the AMD developper documentation :

http://developer.amd.com/Assets/43734_rs780_bdg_pub_1.01.pdf

Pierre

[derobert]

Look the AMD developper documentation :
http://developer.amd.com/Assets/43734_rs780_bdg_pub_1.01.pdf
Pierre

Hi Pierre, i found this earlier and i dont understand this document so thats why i asked ;-)

[absic]

i have no hard drive or anything connected on this port. Bios shows "NONE" but in preferences there is "Capacity 136GB", why?

I don't know but my board shows the same. The only thing I can think of is it's another BIOS glitch that hasn't been noticed. 

Under Ctrl+F1 advanced chipset menu i have this option GPP Core CFG, what is it for?

Like you, I'm not sure exactly what this feature is for and despite reading the AMD Documentation I'm still none the wiser but, I do have a headache now!   

I will see if I can get answers to both these questions and will post back if/when I do. If someone else knows the answer, In simple terms, please let us know! 

[zuban]

well after a ton of reading i'm almost doing a u turn on this and thinking i'll keep it, i still wish i had gone for one of the asus boards, but i could do without the expense and hassle of doing that, i dont understand it tbh, but i could be persueded to keep this board, gigabyte do seem to be recognising there is an issue, to what extent we dont know till maybe they say something, and it would be good if they would.

http://www.overclock.net/amd-motherboards/1023100-official-gigabyte-ga-990fxa-series-owners-42.html

there does seem to be alot of people making enough noise about it that it wont go away.

[gareth170]

this is from a a ud3 user.

When running my cpu at 1.2v i dont get a single bit of v droop, when i raised the v core to 1.475 i only had 0.003 v droop which is excellent . ( Gigabyte 990FXA-UD3)

http://forums.overclockers.co.uk/showpost.php?p=19502662&postcount=10

so it clearly shows theres a fault/issue with the ud5...

i'm glad i've sent mine back and gone for a asus board.....

[absic]

Problem with this is he doesn't actually say which processor he is running and that would be an important factor.

[Night Gyr]

this is from a a ud3 user.

When running my cpu at 1.2v i dont get a single bit of v droop, when i raised the v core to 1.475 i only had 0.003 v droop which is excellent . ( Gigabyte 990FXA-UD3)

http://forums.overclockers.co.uk/showpost.php?p=19502662&postcount=10

so it clearly shows theres a fault/issue with the ud5...

i'm glad i've sent mine back and gone for a asus board.....

Damn simple. Exactly what I had thought.

The AMD UD3 does not have DrMOS. It uses a traditional analog design similar to the one used on the 890 boards.

Now the question is, do the P67 boards (UD4 and higher) have the VDroop issue? They use the DrMOS tech too.

(It still remains a secret why EVGA has such a good power subsytem on their boards and why that can;t be replicated by other manufacturers. Patents?)

[iSeries]

I still don't buy what Gigabyte have come out and said. I think there are real issues with the UD5. They certainly haven't explained the vboost I get when idle (1.35v set in BIOS, 1.38v showing in HW Monitor). They also havent explained why setting 1.65v for my RAM I only get 1.62v. And they certainly haven't explained why the UD3 doesn't have this vdroop 'feature'.

[runn3R]

Hi All

I have contacted HQ about voltage droop questions and received following official statement today:

"GIGABYTE 990 series motherboards strictly follow the AMD AM3+ load line calibration design guide, and so CPU V-core voltage will drop according to loading. Such calibrations are built into the platform to protect the user’s purchase and prevent damage to the PC system."

[iSeries]

I wonder if they'd care to explain why then the UD3 does not have any vdroop. 

[absic]

I wonder if they'd care to explain why then the UD3 does not have any vdroop. 

I think Night Gyr answered this question earlier:

The AMD UD3 does not have DrMOS. It uses a traditional analog design similar to the one used on the 890 boards.

[iSeries]

All that says to me is that the UD5 is defective. Otherwise, if indeed it was a feature of the 990 series, ALL of them would have it.

[Beekeeper]

@ iSeries

You may find the reply here:

Quote: Originally Posted by mjones1
Just a x2 550, even as a quad core i don't have a v droop problem.

oh thats why.

the vdoop seem to be with 6 core cpus
http://forums.overclockers.co.uk/showthread.php?p=19510929#post19510929

the questions to everybody are (only when using 6 cores cpus):
- has anyone tested UD3 for vdroop?
- what is vdroop on other vendors 990FX mobos ?

[gareth170]

update:

the eretailer where i bought this board from, they tested it and even they said it's faulty, so i got my money back, also i should be receive my Asus Crosshair V Formula today....