Stopped booting with 7950 GPU

tazzvon

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Mar 17, 2012
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Specs:
Rosewill THOR V2 Gaming ATX Full Tower
ASUS P8Z68-V PRO/GEN3
SAPPHIRE Radeon HD 7950 OC 3GB
KINGWIN Lazer LZ-1000 1000W
Intel Core i5-2500K Sandy Bridge 3.3GHz
CORSAIR Vengeance 8GB (2 x 4GB)
Crucial M4 CT128M4SSD2CCA 2.5" 128GB SATA III (SSD)
Microsoft Windows 7 Professional SP1 64-bit
BIOS ver 3603

So i had this system up and running for a few months with triple 20" monitors connected to the 7950. Out of the blue went to reboot for whatever reason and would not boot up. finally moved the GPU off of the PCIE 16x to the PCIE 4x slot and it came up. Now we are back to not coming up at all. I can bring the computer up on the onboard video. I have forced the bios to boot from the IGPU and confirmed that the 7950 is being seen but when i force the bios to boot from the 7950 or set to auto with the 7950 installed the boot process stops with the MB VGA-LED light on. Not sure where the issue lies, the motherboard or the GPU. I have seen this issue all over the net but never see a solution. Any help would be great.
 

tazzvon

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Computer does not beep at all. I have cleared the cmos multiple times with no luck. I wish i had another comp to try the card in or another PCIE 16x card to try in this comp but i have nothing. I have other comps but only with PCI slots and not sure if this card will work in there or if i have the power in those comps to boot it. I will check my other comps and post in a few. Thank you for the response. I am also trying to update the GPU drivers to see if this makes a difference.
 

tazzvon

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So i did find an old NVIDIA GeForce 6600 GPU and plugged it into the same PCIE 16x slot and computer boots up fine. So i am guessing this tells me the motherboard is fine it is a GPU issue. Is there anything i can do to narrow it down anymore? I don't have the power in the other comp to put the 7950 in it. I may try to swap PSU's then add it to the other comp and see what happens.
 
if you have a friend with an adequate power supply i would check it with theirs in your normal system just to rule out the power supply, it could be the psu has suddenly developed a fault and cant supply enough power to the gpu and the motherboard.
 

tazzvon

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When i put the 7950 in the other comp i also put the PSU in the other comp so the PSU is not the issue but thanks fot the reply. I have also cleared the CMOS multiple times. Sur do wish i could resolve this as i miss this comp.
 

TenPc

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Thanks for the info, I wasn't sure which one you had.
Are both connectors connected to the video card?

You had 3 monitors connected, were you gaming or doing some other deed? What were you doing when the system crashed?

How do you "force" the bios to boot from the video card? Isn't there an option to set the Primary video display to PEG1?
Are you actually using the first PCIe slot?
 

TenPc

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Without drivers, you are using VGA Safe mode, although the display is going through the video card, the system is using the onboard gpu for its resources.

 

tazzvon

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Yes, both power connectors on the video card are plugged in. I mostly use this comp for gaming (95%) I did go into the bios and set the primary video to IGPU (which iis what i refer to as forceing the onboard video since it is normally set to auto and if a card is installed it will boot from the card). Thanks for the info on the no drivers installed but i think the main purpose of putting the 7950 in another computer was to see if it worked at all since when it is installed in the gaming computer the comp won't even boot. If the gaming comp does not even finish the boot sequence can we rule out any video card driver issues? I don't think the drivvers come into play till after windows is actually started right?

So if the video card works in another computer that says it is good correct?
and if another video card works in the gaming computer then the gaming computer parts are good right?
and since i used the PSU from the gaming computer to test the 7950 in another comp then the PSU is good right?

so if all parts are testing out good, WHY WONT THEY WORK TOGETHER???????

I am frustrated.
 

TenPc

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"So if the video card works in another computer that says it is good correct?"
Well, it is operational, it gives a display however, you need the drivers and the display utility, that are comaptible with your OS.
Not sure about IGPU, must a be new addition to the bios.

You can't use both onboard and a video card, it's either one or the other unless that, too, is a new addition. You can't have a cable with the onbaord and another cable for the video card, to switch between the two, you only get one or the other unless the IGPU enables that option, I'll have to go search.... In the mean time, if you enable the highest amount of vram for the onboard video out, say 1gb, that will be deducted from your available ram volume ... still looking ...

 

TenPc

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I think I'v found something on the manufacturer site (sorry, this is new stuff for me) -

"LucidLogix® Virtu - Universal Switchable Graphics Technology
LucidLogix® Virtu is designed for the Intel® Sandy Bridge platform's powerful integrated graphics. Its GPU virtualization dynamically assigns tasks to the best available graphics resources based on power, performance and system load on Windows® 7 based PCs. It allows users to fully utilize the unique capabilities of advanced Sandy Bridge multimedia features alongside the high end 3D rendering performance provided by installed graphics cards. When no discrete graphics are needed, the graphics card is put in idle mode to lower utilization, heat, fan speed and power draw down to near zero, making the system more environmentally-friendly. For users with diverse needs, LucidLogix® Virtu GPU virtualization provides great flexibility and efficiency. "

So basically you need to install the "LucidLogix® Virtu " utility that came with your motherobard or download it from Gigabyte.
http://www.asus.com/Motherboards/P8Z68V_PROGEN3/

Yes, I'm writing this on the fly and making amendments as I go so you can see that I'm actually researching my own ideas.

Just a side note, your bios version is BIOS version 3603, how did you manage that? The cpu list states only 0301.
The Intel Pentium series cpu are the only ones with the bios version 3603.
http://www.asus.com/Motherboards/P8Z68V_PROGEN3/#support_CPU

However, the GO option for your cpu does infer the 3603 as suitable but it does seem rather odd that the Intel Pentium CPU had it first, your cpu is much more advanced, it's just doesn't seem right.
http://www.asus.com/support/Cpu/LatestBios.aspx?SLanguage=en&p=1&m=P8Z68-V%20PRO/GEN3&cpu=Core%20i5-2500%20(3.3G%2CL3%3A6M%2CiGPU%2C4C%2Crev.D2)&pcb=ALL&sincebios=0301&memo=

If you're not having problems with the bios then forget what I just said in this side note.

Back to the IGPU - The only thing that I can think of is that you need to download the latest Intel Drivers for the motherboard, considering the bios update.
http://www.asus.com/Motherboards/P8Z68V_PROGEN3/#support_Download_30

I'll get back to you the IGPU, perhaps someone else could enlighten us in this thread?

 

TenPc

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Back in ye olde days, Intel and AMD were rivals and their motherboards were different chipsets. They still are in most cases but Gigabyte (AMD-based) and Asus (Intel-based) do have chipsets of the other manufacturer occasionally, trying to be more compatible with each others video cards.
Intel and Nvidia went hand in hand while Amd and Ati went hand in hand.

Your Asus motherboard is Intel-based. Your video card is AMD chipset. If the Nvidia video card works in your motherboard then it could be that your motherboard is Intell/Nvidia preferred (but not exactly exclusively).

"So i did find an old NVIDIA GeForce 6600 GPU and plugged it into the same PCIE 16x slot and computer boots up fine."
It's all rather vague but you don't see AMD graphics cards in Asus (or Intel) motherboards on PC review sites, only Nvidia but you often see Nvidia graphic cards used on AMD motherboards.

Your motherboard supports both - NVIDIA® Quad-GPU SLI™ Technology & AMD Quad-GPU CrossFireX™ Technology, however, Quad-GPU is using two video cards bridged together. It would be interesting to see if two AMD video cards would actually work on this motherboard. hmmm...

I'm stll not being very helpful, sorry about that. I do like to add my extra unwanted details, it makes for good references later on.


As best as I can understand, the LucidLogix IGPU uses the video cards power to boost performance, you don't actually use both the IGPU and the video card as separate display output. When you boot up, the onboard video out would probably be the primary video out option.

http://www.lucidlogix.com/product-virtu-gpu.html

As to why the AMD video card will not post is probably the quirkiness of Intel and Asus.
 

tazzvon

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Mar 17, 2012
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So it is mysteriously working again but only in the 2nd and 3rd PCIE slots. Won't work in the #1 PCIE slot anymore. The only fix i can guess may have helped it is i notice the card was not quite seeting all the way in the slot so i had to bend out the mounting bracket to get it to slide all the way into the slot and thats when it started working in the 2nd and 3rd slots. Now i just need to figure out how to get the mounting bracket to mount so the card is secure. Thanks for all the trouble shooting suggestions we will see how long it continues to work as i have had it working in the past and had it stop working for no reason.
 

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