Configuration:
XFX 790i Ultra
QX9650 @ stock - auto settings
4x1GB OCZ Platinum 10666 @ 1.8V - auto settings
ThermalTake 1200W Toughpower
Problem #1: No Post on cold boot.
Every morning the system will either not post at all, or not complete post, and will require either several reboots and/or a complete system discharge (unplug, hold in power button) in order to get it to POST and boot into windows.
After a successful POST, rebooting will always work just fine with any BIOS settings, but if I turn it off for even 10-15 minutes it will not POST again.
I have tried every combination of components, bios settings/timings/voltages, 2 sticks of RAM in either slot, etc etc, the No Post still happens every morning. This is just with Motherboard, CPU, Power, RAM, and I have tried with 2 different video cards with the same result.
This weekend I will be trying the computer in a different physical location on a different power outlet in a different room.
So for this one, do you guys think it is the power supply? I am starting to think that, the fact that it will POST successfully if I discharge all the power has me wondering. There are other people on other message boards reporting similar problems with this motherboard.
Issue #2: In-Game Stability
With 2 GB of RAM (2 Sticks) the computer has great stability, with 4GB there is a certain amount of tweaking required to get stability (still haven't found the sweet spot).
When the computer POSTs, even with 4GB, with the right settings I can get Prime95, Everest, Super Pi, OCCT, or any other number of programs to run perfect for 12+ hours. Memtest passes all the RAM without any problems.
Occasionally I will get in-game lockups though with the event viewer only stating that the previous shutdown was unexpected...no blue screens, no error messages, just hard-locks. They happen with any one of the two video cards running by themselves with 4GB or RAM, but I haven't been able to get lockups to occur on 2GB, or even with 4GB and relaxed timings.
Now, this is looking like what everyone on other forums has been saying, that the 790i NorthBridge has issues with 4 DIMMs which might be overcome by modifying voltages in the bios.
Plus there is the first issue which might be power related.
I just don't know if its power, or motherboard, or what the problem is and I am looking for opinions to try to figure out why its happening.
I am going to run on 2GB until I get the NO POST situation figured out and then deal with the 4GB issue after that.
I am also going to get my hands on another power supply to swap out with tommorow if changing physical locations doesn't do the trick.
Its been 2 weeks testing back and forth, so im pretty desperate at this point to get it working so I can just start working with it normally. I have been building computers for myself and many others for several years, and this is definitly the most trouble I have had. If it matters, I am also CompTIA A+ IT Technician Certified (2007/8).
It makes logical sense to me that if the computer will run for 12+ hours at 100% CPU and heavy memory loads that all hardware components are good to go...so I am thinking that the problem with the no POST is only a power issue, and that once fixed, I could easily nail down the stability issues with simple BIOS tweaks.
Thank you in advance for any help.
XFX 790i Ultra
QX9650 @ stock - auto settings
4x1GB OCZ Platinum 10666 @ 1.8V - auto settings
ThermalTake 1200W Toughpower
Problem #1: No Post on cold boot.
Every morning the system will either not post at all, or not complete post, and will require either several reboots and/or a complete system discharge (unplug, hold in power button) in order to get it to POST and boot into windows.
After a successful POST, rebooting will always work just fine with any BIOS settings, but if I turn it off for even 10-15 minutes it will not POST again.
I have tried every combination of components, bios settings/timings/voltages, 2 sticks of RAM in either slot, etc etc, the No Post still happens every morning. This is just with Motherboard, CPU, Power, RAM, and I have tried with 2 different video cards with the same result.
This weekend I will be trying the computer in a different physical location on a different power outlet in a different room.
So for this one, do you guys think it is the power supply? I am starting to think that, the fact that it will POST successfully if I discharge all the power has me wondering. There are other people on other message boards reporting similar problems with this motherboard.
Issue #2: In-Game Stability
With 2 GB of RAM (2 Sticks) the computer has great stability, with 4GB there is a certain amount of tweaking required to get stability (still haven't found the sweet spot).
When the computer POSTs, even with 4GB, with the right settings I can get Prime95, Everest, Super Pi, OCCT, or any other number of programs to run perfect for 12+ hours. Memtest passes all the RAM without any problems.
Occasionally I will get in-game lockups though with the event viewer only stating that the previous shutdown was unexpected...no blue screens, no error messages, just hard-locks. They happen with any one of the two video cards running by themselves with 4GB or RAM, but I haven't been able to get lockups to occur on 2GB, or even with 4GB and relaxed timings.
Now, this is looking like what everyone on other forums has been saying, that the 790i NorthBridge has issues with 4 DIMMs which might be overcome by modifying voltages in the bios.
Plus there is the first issue which might be power related.
I just don't know if its power, or motherboard, or what the problem is and I am looking for opinions to try to figure out why its happening.
I am going to run on 2GB until I get the NO POST situation figured out and then deal with the 4GB issue after that.
I am also going to get my hands on another power supply to swap out with tommorow if changing physical locations doesn't do the trick.
Its been 2 weeks testing back and forth, so im pretty desperate at this point to get it working so I can just start working with it normally. I have been building computers for myself and many others for several years, and this is definitly the most trouble I have had. If it matters, I am also CompTIA A+ IT Technician Certified (2007/8).
It makes logical sense to me that if the computer will run for 12+ hours at 100% CPU and heavy memory loads that all hardware components are good to go...so I am thinking that the problem with the no POST is only a power issue, and that once fixed, I could easily nail down the stability issues with simple BIOS tweaks.
Thank you in advance for any help.