phenom ii - no vid card with 4 cores enabled

[Mad-Marty]

Hi all,

I finally bought the parts and assembled the system.
(GA-MA790GP-UD4H, Phenom II x3 720 Black Edition)

ACC to auto works, 4 cores.
But with that set, the mobo seems to be unable to initialize the Graphic cards.

I tried with a 8800 GT and a Radeon x700 pro.

After ACC is changed it simply doesn't find cards, only the integrated hd 3300 works. If I disable the integrated one in bios, it still doesn't use the PCI-E one, one long, 2 short beeps for "video failure".

Any suggestions how to get that working?
Maybe someone has a modded bios which just enables the cores but does not trash video management?


Thanks in advance

[i found nemo]

clear cmos

take out battery on the motherboard and unplug it ( computer ) from the wall for 30 seconds

[Mad-Marty]

Already tried cmos clear, in fact it's what i do when i don't get any video signal.

As soon as I enable ACC again graphics card fails to initialize (except the integrated one).

[PaganII]

I'm getting mildly corrupted color on some desktop icons, taskbar icons and parts of some application GUIs.
3D'06 runs great and looks great, games look great but sound is crackely, even windows sounds while booting. reinstalled sound, graphics, chipset drivers = no change.
Disabled EAX and Crystalizer = tiny bit better but unacceptable
Sound and color was perfect before unlocking 4th core.

GA-MA790FXT-UD5P, 720BE 0904EPMW, F3b, X-FI, HIS 4870

[Brother Esau]

I assume all works well when only three cores is enabled? If so this would be a really Good Example of why people should not be looking to enable a Core that has been disabled for a very good reason obviously. Please correct me if my assumption is wrong on everything working if only 3 core enabled.

[mngdew]

The one and only way to bring back the video is by killing the 4th core and go back to the original 3 cores.

[soundood]

this has nothing to do with the 4th core brother, this is def a driver issue.

he needs to do a full reinstal of OS and then look at getting updated drivers for all his bits, i suspect the sound driver is the issue.

i would instal everything, and leave the sound driver to last, and give it a try without that driver.

then instal sound driver, to see......... my spidey senses are tingling with this one

edit: yes if you enable the 4th core it appears ehhh? again i suspect windows just doesnt like it, did you instal the OS with the 4th core enabled, or just enable the 4th core on a 3 core instal?

[Mad-Marty]

I don't think its the obvious "the core is defect" thing.

With 4 cores and IGP graphics iam able to bench the 1024M run of wPrime for example. So i doubt it is that core which prevents bios init when enabled .

I suspect there is something wrong with the chipset registers when enabling ACC on phenom II or something like that, maybe related to a specific hardware combination in that case.

It even boots into windows (i can hear the sound) when the video card could not be initialized and the integrated graphics is set to disabled.

Definitely not a driver issue, the BIOS is unable to initialize video, so it can't be a driver issue.
BIOS beeps say "unable to initialize video" - and the cards fan stays at full speed all the time.


Yes, the 4th core is shown and does prime calculations without faults, the speed increase is existent too.

[Brother Esau]

I guess we shall see Pre-Boot is Bios not O.S

[Dumo]

On AM3 board with ddr3: 720 can run the 4th core ok, but with limited fsb and nb freq scalling.
720 cheaper price is for a reason

Get 810 or 940 for real 4cores oc

[Mad-Marty]

I suspect strange things happen with ACC because it is not designed for Phenom II, so maybe setting registers that are used for something else on Phenom 2.
Well maybe someone finds out which MSRs are going to unlock the cores only and the strange side effects will go away with special modded bios versions.


The core seems ok, when doing calculations.
Maybe its not the core at all, but the chipset which reacts strangely on the ACC setting when a Ph2 is installed?

Would be good to know what happens to X4 users when they enable ACC, maybe they get strange effects too ?!
Someone here with a X4 volunteers to try that?

[soundood]

i have a x4 here, and to be honest havent even tried ACC yet, ill give it a go when i get back from work.....7 hrs from now lol.

[Particle]

Sounds more like a motherboard problem (probably a BIOS bug) regarding ACC than the chip itself. Also, it can't be a driver issue since he doesn't get any video during POST--way before Windows or anything can come into play.

[iandh]

BIOS bug. For instance F3b has same S3 sleep issues as F3 but F4d and F4g do not. This happens with or without 4th core enabled, so obviously is the BIOS (not saying for sure in your case, just giving an example... it is not always the 4th cores fault)

[blindbox]

I assume all works well when only three cores is enabled? If so this would be a really Good Example of why people should not be looking to enable a Core that has been disabled for a very good reason obviously. Please correct me if my assumption is wrong on everything working if only 3 core enabled.

It never hurts to try. You've already posted the same thing on a few threads. It's like saying people not to hit 6 GHz on chips cuz it's not meant to go that far. People did it with the Radeon 9xxx series, and the Geforce 6s, so why not PhII X3? If it doesn't work, try to get it to work. If it still doesn't, you run out of luck. Some issues are simply bios related, while others are related to the 4th core.

I should be buying one PhII x3 720BE tomorrow , something to fill me up before going for a PhII x4 925, whenever it's coming out.

[Mad-Marty]

i have a x4 here, and to be honest havent even tried ACC yet, ill give it a go when i get back from work.....7 hrs from now lol.

Thanks soundood,
what did your X4 do under ACC?

Did it POST at all?

[Brother Esau]

Its just a thought for you guys to think about is all Do as you wish fellas you bought it

[soundood]

Thanks soundood,
what did your X4 do under ACC?

Did it POST at all?

sry mate i got distracted with my new toy, yes it did post, but does nothing at all, at the moment i still get prime fails at 4.1 gig, regardless of ACC, this was tried with auto/each core and so on.

this has got me wondering though, the SB750 had this added later yeah, to support and aid the phenom I's, in thier clock potential, but then this was dropped, under a year later and serves no purpose to further Phenoms II's?

seems a bit odd to to me, has anyone achieved a better clock from ACC with a Phenom II?

if not, why not? if yo know what i mean.

i think i fried this board anyway, needs an RMA

[daytripper67mi]

Damn, sound sorry to hear you cooked your new board .you on the trusty ax78 now?

[keysplayr]

You need to set "First Display Init" to PEG. It's probably set to PCI.

I have the same exact setup the OP has. PhenomII X3 unlocked to X4 and Gigabyte GA-MA790GP UD4H. Disabled onboard video and using a 8400GS (rig is not for gaming, I just didn't want my system memory sucked up by the onboard GPU even though it has dedicated 128MB sideport mem). I had to set the First Display Init to PEG, then disable the onboard GPU. Works fine. Oh, Windows Vista 32.

[BGinner]

Sounds strange, maybe its the card

[Mad-Marty]

sry mate i got distracted with my new toy, yes it did post, but does nothing at all, at the moment i still get prime fails at 4.1 gig, regardless of ACC, this was tried with auto/each core and so on.

this has got me wondering though, the SB750 had this added later yeah, to support and aid the phenom I's, in thier clock potential, but then this was dropped, under a year later and serves no purpose to further Phenoms II's?

seems a bit odd to to me, has anyone achieved a better clock from ACC with a Phenom II?

if not, why not? if yo know what i mean.

i think i fried this board anyway, needs an RMA

Sorry to hear, whats wrong with the board now?

You need to set "First Display Init" to PEG. It's probably set to PCI.

I have the same exact setup the OP has. PhenomII X3 unlocked to X4 and Gigabyte GA-MA790GP UD4H. Disabled onboard video and using a 8400GS (rig is not for gaming, I just didn't want my system memory sucked up by the onboard GPU even though it has dedicated 128MB sideport mem). I had to set the First Display Init to PEG, then disable the onboard GPU. Works fine. Oh, Windows Vista 32.

Tried that actually - Booting up with the onboard, then setting first init to PEG, but thats a no go. Just beeps saying card could not be initialized.

I even noticed when I enable ACC while my BFG 8800 is attached, the system will power off (and i can't power it on simply, it will just shut off again until cmos is cleared).

So only way to enable ACC for me is to put the card out, enable, boot with integrated graphics - works fine then.

Thats a crazy incompatibility i think ...