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Questions about GIGABYTE products => Motherboards with AMD processors => Topic started by: Gooch on June 06, 2011, 06:18:50 am

Title: Issues with RAM on GA-870A-UD3
Post by: Gooch on June 06, 2011, 06:18:50 am

Hello,

I recently started getting multiple inconsistent BSOD's in my brand new PC. Memtest86+ showed up alot of memory errors. I tested each RAM stick and each slot (1x1, 2x2) and they all were fine. All the sticks checked out fine and up to 12GB of RAM it has been working fine.

However when I bump the system up to 16GB of RAM, Memtest86+ fails test 5 and onwards.

Is there a limitation in this motherboard? The RAM is G-Skill DDR3 1333Mhz

The product page said it supports 16GB of RAM
http://www.gigabyte.com/products/product-page.aspx?pid=3753#sp

Title: Re: Issues with RAM on GA-870A-UD3
Post by: Dark Mantis on June 06, 2011, 09:14:00 pm

Hi

Yes it is all down to your settings. They need to be tweaked manually to make up for the extra loading on the memory controller. I can't help you with the exact settings on an AMD platform I'm afraid but I am sure absic or one of the others will be able to.

Title: Re: Issues with RAM on GA-870A-UD3
Post by: Gooch on June 11, 2011, 12:49:56 am

Just to add more info

Current voltage settings on the north bridge:
DRAM Voltage 1.5v
North Bridge voltage 1.1v
North Bridge PCIE voltage 1.8v
VCORE 1.35v

Title: Re: Issues with RAM on GA-870A-UD3
Post by: RQuallsJR on June 11, 2011, 02:31:49 am

 Try this, These are my settibgs for useing 4 sticks.
 DDR volt control=1.55 to 1.6  I would go with 1.6 seeing you have all 4 slots filled.
 Trfc 0-3 set @ 160ns
 South Bridge volt control = SB/HT =1.4
 Not sure how your bios is up on your board but these are common setting on a gigabyte board. let me know how it goes...

Title: Re: Issues with RAM on GA-870A-UD3
Post by: GW on June 12, 2011, 01:32:43 am

I would also be very interested in your results.

Intent is to test 16 GB ( four sticks ) once I get a stable MB.

Title: Re: Issues with RAM on GA-870A-UD3
Post by: Gooch on June 12, 2011, 02:15:05 am

All modules were already set to 160ns
I upped the DDR voltage to 1.6v however despite having plenty of control over the NB, I cant seem to access any settings for the South

I ran test 5 of Memtest86+. Still producing errors however only 3 compared to the hundreds I received before.

Failing address: 001f005b128
Good: ffffffee          Bad: fffffffe            Count : 1

Failing address: 001f405b108
Good: ffffffee          Bad: fffffffe            Count : 2

Title: Re: Issues with RAM on GA-870A-UD3
Post by: Gooch on June 12, 2011, 04:40:14 am

Never mind the last post. I took the 4th RAM chip back out again and re-inserted it. Getting no errors on Test 5 anymore. Intend to do a full memory check but everything appears to be fine.

Appears ramping up the voltage to 1.6v from 1.5v did the trick

Title: Re: Issues with RAM on GA-870A-UD3
Post by: Dark Mantis on June 12, 2011, 03:01:02 pm

Normally a slight increase of voltage will do the trick but it is just knowing what is safe on your particular board/modules. ;)