[Troubleshooting] Sapphire 290x Random Black screens: GPU or PSU's fault?

[OceanicMeerkat]

Here is my complete build:

PCPartPicker part list: http://pcpartpicker.com/p/VkR2WZ
Price breakdown by merchant: http://pcpartpicker.com/p/VkR2WZ/by_merchant/

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($200.00)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($31.99 @ Amazon)
Motherboard: Gigabyte GA-Z97X-GAMING 7 ATX LGA1150 Motherboard ($140.00)
Memory: Crucial Ballistix Sport 16GB (2 x 8GB) DDR3-1600 Memory ($139.99 @ Micro Center)
Storage: Samsung 840 EVO 250GB 2.5" Solid State Drive ($129.99 @ Amazon)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($79.99 @ NCIX US)
Video Card: Sapphire Radeon R9 290X 4GB Tri-X Video Card ($500.00)
Case: Fractal Design Define R4 (Black Pearl) ATX Mid Tower Case ($89.99 @ Micro Center)
Power Supply: Rosewill Capstone 750W 80+ Gold Certified Semi-Modular ATX Power Supply ($69.99 @ Newegg)
Optical Drive: Pioneer BDR-209DBK Blu-Ray/DVD/CD Writer ($54.99 @ Newegg)
Operating System: Microsoft Windows 8.1 - 64-bit (OEM) (64-bit) (Purchased For $0.00)
Monitor: Acer K272HULbmiidp 60Hz 27.0" Monitor ($399.99 @ Amazon)
Wireless Network Adapter: TP-Link TL-WDN4800 802.11a/b/g/n PCI-Express x1 Wi-Fi Adapter ($34.99 @ Micro Center)
Mouse: Razer DeathAdder 2013 Wired Optical Mouse ($59.99)
Headphones: Logitech G930 7.1 Channel Headset ($69.99)
Other: Logitech Z313 Speaker System (Purchased For $0.00)
Other: Inland USB Gaming Keyboard - 110 Key, Black (70117) (Purchased For $0.00)
Total: $2001.89
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-08-10 02:38 EDT-0400

I've started having weird problems with the 290x. It will randomly crash (sometimes when I am playing games, other times when I am just browsing on Chrome) and my monitor will get no signal. The motherboard reads a "b2" code, which means "Legacy Option ROM initialization", whatever that means. All fans are still operational, even on not-working graphics card. I have to do a hard restart to get the card working again, but it will eventually crash again.
I removed the GPU and used just the integrated graphics without a problem. I assume this means the GPU is the problem. Is there any way it could be an unreliable power supply that doesn't give the GPU enough power, or a bad PCIe slot on the mobo?
What should I RMA?

 

[nathangmail]

have you tryed different drives it sounds like a faulty card

 

[OceanicMeerkat]

Do you mean difference drivers?

 

[uffda]

having the same problem with an r9 290. I thought it might be overheating.. still might. I'm not a guru, but I took off one of the covers and layed the box on it's side so the heat could rise directly out of it.. This may have helped, as the black screen appears to not happen as much.. but it still happens.

 

[OceanicMeerkat]

having the same problem with an r9 290. I thought it might be overheating.. still might. I'm not a guru, but I took off one of the covers and layed the box on it's side so the heat could rise directly out of it.. This may have helped, as the black screen appears to not happen as much.. but it still happens.

I RMAd the card and the PSU, and had the same problem.

I have noticed that if I unplug/turn off the PSU the problem goes away for awhile (sometimes up to several days) before becoming more frequent again. I saw a thread where a few other people had problems with Gigabyte motherboards and had to RMA them for a faulty BIOS chip. Probably trying this the next time I am at home and can take this bad boy apart.

Do you also have a Gigabyte motherboard?

 

[uffda]

ASUS mobo

I ordered a 1000W PSU and another case fan the other day with the idea that I'm either under-powering or over-heating the card. We'll see if that works. I've already tried updating the bios, different drivers / driver sweep.. doesn't seem to do it. I got to a point where I could not even get CCC to install.. will try again when all the parts get here.