Official GIGABYTE Forum

990xa-ud3 core unlcock

990xa-ud3 core unlcock
« on: November 27, 2011, 01:53:05 pm »
I've been trying to unlock a 960t to a 5 or 6 core. The cores can be unlocked at bios but windows will not boot. On my latest effort I've enabled core unlock and manually disabled all cores except 0 (which cant be disabled). Even then windows will not boot. Seems core 0 is the defective. Is there any way to disable core 0 and enable all others?


  • 120
  • 4
Re: 990xa-ud3 core unlcock
« Reply #1 on: December 19, 2011, 03:54:42 am »
Hi guy ;)

I've got the ma790gp (ddr2) equipped with the sb750 southbridge which allows me to use ACC function and i've recently changed my x3 720 be for this "magic" x4 960t be... Like i've done with my 720 i've turned on the hybrid ec firmware and enabled the Acc function on "auto" (this allowed me to unlock the 4th core on my ex-720) but what was my big surprise when this same manipulation led me to several crashes... mainboard booted but it crashed everytime when win7 started...i've stayed 4 days disappointed with the only satisfaction of succeeded in o/cing my 960t at 20x200 @ 1,525v cnq on but turbocore off, when i decided to unlock my cpu for the last chance... i've turned on once again the hybrid ec firmware but instead of setting on "auto" ACC function i set it on "manual" and disabled each core one by one except the "core 0" which cannot be disabled and then i've enabled each core one by one (needed one reboot for each manipulation) and succeeded in unlocking the 5th core which allowed me to transform my 960T to a x5 1600T, even though cpu-z 1.59 tells it's a x6 1600T... Once this manip made i've overclock this x5 and there is the cpu-z validator banner : -->

P.S: Unfortunately i haven't been able to unlock the 6th core...  :'( :-\ :-[
Antec Nine Hundred Two V3
Seasonic X-460 FL (fanless) 80+ Gold
AMD Athlon X4 760K
G1.Sniper A88X 3.0
8Gb Crucial Ballistix Tactical Tracer R/G
Scythe Katana 3
Gigabyte HD 7970 Ghz Edition
Samsung 830 256Gb SSD
Seagate Barracuda Green LP 2TO
Sony-Nec 7240 S
Acer 23" P235 Hdmi

Re: 990xa-ud3 core unlcock
« Reply #2 on: January 19, 2012, 03:10:13 pm »
I have a phenom x2 550 (revision RB-C2) and was wondering what I'm doing wrong when  unlock the cores in bios.
already put in auto unlock core and windows starts and i go to the net and everything but when I put the prime blocks computer
when i put in three core, windows starts  i play fifa, need for speed  the run but after a while the computer crashes and reset is the solution. i dont have any blue screen. if i put prime with the youtube computer freezes.
already put the memory voltage 1.6, 1.5 cpu voltage. Nortbrige 1.2 cpu, cpu 1.4 NB Control VDD  and  HT Link  to 1.3.
another thing is that in 2 cores i put the speed of 3.8 and nb to 2700 and ht link to 2700 and computer goes ok with the prime95 and youtube.
Sorry for bad english


  • 7
  • 0
Re: 990xa-ud3 core unlcock
« Reply #3 on: March 29, 2012, 08:26:34 pm »
Seems something related to an strange Bios coding, if not, I really dont know @ this weird behaviour in our boards.
BTW seems Hybrid option was removed from the jumplist of ACC methods.
If this motherboard was made for FX series in mind why it claims support for unlocking cores?

My TH:,8571.0.html

Dark Mantis

  • *
  • 18405
  • 414
  • 10typesofpeopleoneswhoknow binaryandoneswhodont
    • Dark Mantis
Re: 990xa-ud3 core unlcock
« Reply #4 on: March 30, 2012, 04:43:37 pm »

I think from what I have seen here on the forum in the past that Gigabyte requires a higher threshold to enable the unlocking of extra cores compared to some other motherboard manufacturers. Whether this is good or not depends on your standpoint I guess. If you go back through some of the similar threads in the past you will see what I mean.
Gigabyte X58A-UD7
i7 920
Dominators 1600 x6 12GB
6970 2GB
256GB SSD, Sam 1TB, WDB320GB
HAF 932

Gigabyte Z68X-UD5-B3
i7 3770K
Vengeance 1600 16GB
6950 2GB
Revo Drive x2, 1.5TB WDB RAID0
16x DLRW
StrikeX S7
Full water cooling
3 x 27" Iiy