Gigabyte GA-MA790GP-UD4H Cold boot problem.

[Keysplayr]

The rig is fine when it's warm. I can cold boot or restart as often as I need and it always comes up. But if I leave the rig off overnight, and hit the power button, I get nothing. No post beep, no BIOS screen. I have to either hit reset, and if that doesn't do anything, switch the PSU switch off and then on, then hit power and it's boots up. Sometimes I have to do this twice before it boots up. What gives?

I noticed this same exact symptom with the ASUS M3N-HT Deluxe I had with a Phenom 9550.

Is this a common issue with AM2/AM2+ boards? Or Phenoms?

Currently I have a PhenomII X3 720 unlocked to PhenomII X4 920 via 4th core unlock.

But this occurs whether I have the 4th core unlocked or not. No overclocking is involved either. Whether the 4th core is unlocked or not, I am running 2800MHz with CnQ enabled.

Any ideas?

Thanks,
Keys

 

[Flipped Gazelle]

Interesting issue. I've done 6 or 7 AM2+ builds over the last few months, and have not seen, nor been told, of any issues like this. Using AMD 770/780/790 chipsets, and also an Nvidia 8200 chipset.

I did have some problems similar to yours a few years back, I don't remember the details, though. IIRC, I never did anything about it - it was sporadic enough that I wasn't especially bothered - and the system was eventually parted out.

What happens when you swap another PSU in there?

 

[Keysplayr]

I'll try the PSU swap tonight. Right now I have an Evermax 465W 36A 12V+ in there now. I'll try the Corsair tonight. 750TX.

 

[Link]

It's a known problem with AMD mobo by Gigabyte for a looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong time. It's tirggered by overclocking your NB that needs bumping up CPU NB VID voltage. Gigabyte needs to fix their bios such a way that, system starts up by initiating all voltage increase before initiating speed bump.

 

[Nighthawk8226]

I just got the MA790GP-UD4H several days ago and have been testing my system via a HSPC Tech Station, and have never run across this. I've kept the computer on for hours, turned it off and restarted in the a.m., with no problems whatsoever. What I DID have a problem was with my Western Digital RE3 SATA hard drive when I went to install Vista 64-bit: the system didn't 'find' a hard drive, so I had to connect it to my old system, 'initialize it', then reinstall it in the new system. I even had no problem turning on the system from the FIRST time with Eight Gigs ram installed! Go Figure.


...By the way, how DID you unlock your Phenom 720 when the GA-MA790GP-UD4H doesn't have a 'direct' ACC??? I've read others have been able unlock also using this board...Please let me know!!!

 

[Link]

Originally posted by: Nighthawk8226
I just got the MA790GP-UD4H several days ago and have been testing my system via a HSPC Tech Station, and have never run across this. I've kept the computer on for hours, turned it off and restarted in the a.m., with no problems whatsoever. What I DID have a problem was with my Western Digital RE3 SATA hard drive when I went to install Vista 64-bit: the system didn't 'find' a hard drive, so I had to connect it to my old system, 'initialize it', then reinstall it in the new system. I even had no problem turning on the system from the FIRST time with Eight Gigs ram installed! Go Figure.

The cold boot issue comes up only if you are overclocking the NB and increasing NB VID voltage. As long as you overclock NB to a limit that doesn't require the voltage bump, you don't see this problem.

...By the way, how DID you unlock your Phenom 720 when it doesn't have a 'direct' ACC??? I've read others have been able unlock also using this board...Please let me know!!!

If you still have the shipped bios in your mobo, then Ctrl+F1 at the main bios screen will give you more bios tweaking options including ACC. Just set the ACC to auto, and you're set. If for some reason your system doesn't start, then you are not in luck.

 

[Nighthawk8226]

Thanks - I'll try it as soon as I get off work and post.

 

[Link]

Just want to let you all know. I returned my MA790FXT-UD5P. This too has the cold boot issue when NB is overclocked. What good is a need mobo if it cannot handle any overclocking? It's a well known fact that NB overclocking is the major contributor for performance boost on Phenom II. When you overclock NB, it wil also overclock the L3 cache. Comparing to i7, PhII L3 cache is too slow, so when you boost the speed of L3, it also boost the overall CPU perfomance.

 

[AstroGuardian]

Try setting the Primary graphic adapter in BIOS to PEG. Some boards have trouble posting if they are set to PCI but have PEG graphic cards. Happened to me many times with different mobos from Asus, MSI, DFI and i think Biostar, but never with Gigabyte (I hope i am not mistaking with this). Lots of boards come into my hands

 

[Flipped Gazelle]

Any updates, keys?

 

[HeavyD]

Originally posted by: AstroGuardian
Try setting the Primary graphic adapter in BIOS to PEG. Some boards have trouble posting if they are set to PCI but have PEG graphic cards. Happened to me many times with different mobos from Asus, MSI, DFI and i think Biostar, but never with Gigabyte (I hope i am not mistaking with this). Lots of boards come into my hands

Hope you are right. I have this board and have no issues at all the installation went smooth. Have not overclocked but plan to in the future.

 

[Summer]

I'm having the same issue with my Asrock AOD790GX/128M with a Phenom II 720x3 enabled to 4cores (stable @ 3.5ghz - 2HRs of OCCT + 2Hrs of Prime95). System "hangs" from a cold boot. No hardware issue or beeps from the motherboard. Current solution is to restart right after the cold boot.

INFO: The cold boot up problem only happens when "ACC" is enabled in the bios.

I've already e-mailed tech support and waiting for a response.

 

[brianj320]

thanks for that info Summer, be sure to keep us posted.

 

[SunnyD]

You know, I have a similar problem with my Gigabyte MA790GP-DS4H... occasionally on cold boot the system will power up, the BIOS will start, but it will "hang" before it does the memory check. The memory test in fact doesn't even come up. If I flip the PSU switch off for a few seconds (30 or so), then back on, it seems to boot and POST without any problems.

No overclocking at all at the moment.

 

[zeblade]

Hmm well I got this board "GA-MA790GP-UD4H" latest bios. Have no problems with NB overclocked. Overclocked great with 940 x4 3.6.. can go higher but.. lol why..

 

[superunknown98]

I have this issue with a Asus M3A78-T, AMD 790GX chipset. I am also running a Phenom 2 x3 720be that has never been overclocked. Don't know what to make of it.

 

[Malakai]

Mine has no problems at all! I also bought a friend the same combo of cpu&mobo that I have myself, it also works flawlessly.

Please dont say this is an issue with all gigabyte mobos as it is not.

 

[Alienwho]

Originally posted by: Summer
I'm having the same issue with my Asrock AOD790GX/128M with a Phenom II 720x3 enabled to 4cores (stable @ 3.5ghz - 2HRs of OCCT + 2Hrs of Prime95). System "hangs" from a cold boot. No hardware issue or beeps from the motherboard. Current solution is to restart right after the cold boot.

INFO: The cold boot up problem only happens when "ACC" is enabled in the bios.

I've already e-mailed tech support and waiting for a response.

I have this same problem! Any solution?

 

[heyheybooboo]

Originally posted by: Alienwho

Originally posted by: Summer
I'm having the same issue with my Asrock AOD790GX/128M with a Phenom II 720x3 enabled to 4cores (stable @ 3.5ghz - 2HRs of OCCT + 2Hrs of Prime95). System "hangs" from a cold boot. No hardware issue or beeps from the motherboard. Current solution is to restart right after the cold boot.

INFO: The cold boot up problem only happens when "ACC" is enabled in the bios.

I've already e-mailed tech support and waiting for a response.

I have this same problem! Any solution?

'Technically' I believe ACC is not necessary for a Phenom II microprocessor.

ACC with the sb750 was meant to improve PLL timing and 'skew' with the original Phenoms. The timing issues were addressed architecturally within the new PhIIs eliminating the need for ACC.

But it just so happened (The Law of Unintended Consequences - ) that enabling ACC on certain PhII procs would unlock a core.

I don't really know - but I will guess that the ACC 'magic pins' on the original Phenom BEs became the 'magic backdoor' to unlocking a core on the Phenom IIs.

 

[rhaezor]

I have this cold boot issue with my Gigabyte GA-P35-DS3L rev2.0. I will see if if bumping up the voltage will help when I get home. So far nothing has worked, I've memtest'd my memory and its fine. I'm currently trying to decide whether to upgrade my cpu and memory with my motherboard, or just get a motherboard replacement. Currently running an e6750 and 2gb of 1066 DDR2 at 5-5-5-15

 

[rhaezor]

well I had one successful cold boot this morning.. but 9 hours later or so after work it exhibited the non-posting issue.

 

[Sylvanas]

Originally posted by: heyheybooboo

Originally posted by: Alienwho

Originally posted by: Summer
I'm having the same issue with my Asrock AOD790GX/128M with a Phenom II 720x3 enabled to 4cores (stable @ 3.5ghz - 2HRs of OCCT + 2Hrs of Prime95). System "hangs" from a cold boot. No hardware issue or beeps from the motherboard. Current solution is to restart right after the cold boot.

INFO: The cold boot up problem only happens when "ACC" is enabled in the bios.

I've already e-mailed tech support and waiting for a response.

I have this same problem! Any solution?

'Technically' I believe ACC is not necessary for a Phenom II microprocessor.

ACC with the sb750 was meant to improve PLL timing and 'skew' with the original Phenoms. The timing issues were addressed architecturally within the new PhIIs eliminating the need for ACC.

But it just so happened (The Law of Unintended Consequences - ) that enabling ACC on certain PhII procs would unlock a core.

I don't really know - but I will guess that the ACC 'magic pins' on the original Phenom BEs became the 'magic backdoor' to unlocking a core on the Phenom IIs.

ACC does indeed affect the overclockability of P2's. I noted this in my X4 955 overclocking adventure and also supposedly AMD have also ackowledged this in Bit-techs review.

Cold boot issues are usually a symptom that can be alleviated with a new BIOS.

 

[rhaezor]

I was running an older bios and had cold boot issues.. upgraded to the latest, "beta" bios F9c. Still having issues. I sent a tech support question into Gigabyte, no response yet.

I had read somewhere that all of these issues stem to a faulty piece of electronics in the p35 chipset which is why different brands of mobos experience this.