Installing a new GPU, no post after install

LordHuffnPuff

Reputable
Aug 4, 2014
2
0
4,510
Hey everybody. I'm building a computer, and I've run into a bit of a quandary.

Specs:
Case - Cooler Master HAF 912 - Mid Tower Computer Case with High Airflow
Motherboard - ASUS Z97-PRO LGA 1150 Intel Z97 HDMI SATA 6Gb/s US
HDD - Western Digital 1 TB SATA III 7200 RPM 64 MB Cache Bulk/OEM Desktop Hard Drive, Black, WD1003FZEX
SSD - Samsung Electronics 840 EVO-Series 120GB 2.5-Inch SATA III Single Unit Version Internal Solid State Drive MZ-7TE120BW
RAM - 8GB G.Skill DDR3 PC3-12800 1600MHz Ripjaw Series (9-9-9-24) Dual Channel kit F3-12800CL9D-8GBRL
PSU - Rosewill 750W 80 Plus Plantium Certified Power Supply FORTRESS-750
Optical Drive - Asus 24x DVD-RW Serial-ATA Internal OEM Optical Drive DRW-24B1ST (Black)
Fan - Noctua 6 Dual Heatpipe with 140mm/130mm Dual SSO Bearing Fans CPU Cooler NH-D14 - Retail

Old GPU - XFX RADEON Double D R9 280X 1000MHz BOOST Ready 3GB DDR5 2XmDP HDMI 2XDVI Graphics Cards R9-280X-TDFD
New GPU - EVGA GeForce GTX770 SuperClocked with EVGA ACX Cooler, 2GB GDDR5 256bit, DL DVI-I, DVI-D, HDMI, DP, SLI Ready Graphics Cards (02G-P4-2774-KR)

I had the machine up and running, but after a few days of use discovered that my originally chosen graphics card, the 280X, had serious issues with Windows 8/8.1 to the tune of driver crashes (with multiple versions of the driver,) random poweroffs, stuttering framerate during tasks as mundane as web browsing, dragging down the entire system performance (audio began to stutter, if I was on a Skype call I suddenly sounded very choppy, and so on, and so forth.) Needless to say, this was not really viable, so that GPU will be getting returned. I purchased the NVIDIA 770 as a replacement.

After installing the 770, I cannot get the machine to post. The motherboard gets stuck during this process, before the display comes on, at q-code 15, which the manual helpfully informs me is "Pre-memory System Agent initialization is started." The machine posts fine without this GPU plugged in, and I put the old one back in as a test, the machine posts fine with that one as well.

I'm thinking this is just a dud GPU, but when I first installed the 280X I also encountered this problem, which was solved by removing the battery to reset the BIOS. Of course, there was no joy there this time. My PSU seems to be able to output more than enough power to run this card.

This is my first entirely custom build, so any advice is appreciated - I'm definitely not an expert. I've run through the steps in this post and had no luck. Thanks!