Official GIGABYTE Forum

Unlocking cores on AMD Phenom x2 550 BE with MA780G-UD3H mobo

Hi!
I read the other day about people being able to unlock cores on my cpu (AMD Phenom x2 550 BE), it mentions the Acc option in bios. But i cant find it...I recently flashed my bios to a newer version, could it be that gigabyte took away that option in the new version?

You can read about it here:http://www.xbitlabs.com/articles/cpu/display/phenom-athlon-ii-x2_15.html
Also here is some turkish guy about tho buy one and if you scroll down a bit, you find a comment from Lsdmeasap (gigabyte forum moderator, so i'm guessing he's not a noob)
and he says:Buy the Gigabyte, it has ACC in it as well and is a much better quality board

Greatful for help! It would be wonderful if i could turn my X2 3.1 GHz cpu into a X4 3.8 GHz...:)
« Last Edit: July 29, 2009, 11:48:55 am by runn3R »

runn3R

  • *
  • 1328
  • 57
  • Admin
    • GIGABYTE UK
Re: Unlocking cores on AMD Phenom x2 550 BE with MA780G-UD3H
« Reply #1 on: July 28, 2009, 06:47:36 pm »
Hello

This MB does not support ACC so you can't enable any more cores of your CPU. This is because this MB is based on SB700 southbridge, while only SB750 and SB710 support ACC.

You can find following posts useful:
http://forum.giga-byte.co.uk/index.php/topic,328.0.html
http://forum.giga-byte.co.uk/index.php/topic,180.0.html
« Last Edit: July 29, 2009, 11:49:20 am by runn3R »
ZX-S & C64 are still my favourites ;-)

runn3R

  • *
  • 1328
  • 57
  • Admin
    • GIGABYTE UK
You can see below results for this CPU with enabled 4 cores and FSB 300 MHz resulting in 3600 MHz operating frequency done on MA770T-UD3P (based on SB710)

24 hours burn-in test result:


3D Mark 06 result:


Thanks to hicookie for tests & screenshots!
« Last Edit: July 29, 2009, 11:46:38 am by runn3R »
ZX-S & C64 are still my favourites ;-)

Beekeeper

  • 260
  • 9
Re: Unlocking cores on AMD Phenom x2 550 BE with MA780G-UD3H mobo
« Reply #3 on: July 29, 2009, 03:59:43 pm »
wow :o  really nice trick, having 2 more cores just for nothing!
and the system is stable
« Last Edit: July 29, 2009, 04:00:43 pm by Beekeeper »
“Rivers know this: there is no hurry. We shall get there some day.”

Re: Unlocking cores on AMD Phenom x2 550 BE with MA780G-UD3H mobo
« Reply #4 on: July 30, 2009, 07:19:17 pm »
Pot luck more like. If what I understand is the case is correct, getting a four core system from an X2 chip isn't guaranteed. Where Intel have different dies for the Core2 Duo and Core2 Quad chips I believe AMD use the same die for the Phenom II X2, X3 and X4, disabling the cores they don't need on the X2 and X3. For Intel, a faulty core on their quad chip means its unusable, so any defects mean the chip is headed for the skip. AMD, on the other hand, simply disable the faulty core(s) to create the X2 and X3 chips from the X4 meaning they have far less waste. When demad for the X2 and X3 outstrips the number of X4s with faulty cores, they simply take a good one and disable cores to get what they need. So, if you are lucky enough to get one of these you effectively get an X4 chip for the price of an X2 (or X3). But if you're unlucky the disabled cores are faulty and either they won't run or will be unstable. So, it is well worth trying to enable the disabled cores on he X2 and X3 if you can (getting something for nothing is always worth a try), but the only way to guarantee having four stable and fully functional cores is to buy an X4 chip in the first place.

 

anything