GTX 970 Crashing Computer with Graphics Heavy Games

[muffinxman]

Operating System
-Windows 8.1 64-bit

CPU
-Intel Core i7 4770K @ 3.50GHz 36 °C
-Haswell 22nm Technology

RAM
-GSkill Sniper DDR3 2400 16.0GB Single-Channel DDR3 @ 666MHz (9-9-9-24)

Motherboard
-MSI Z97-G45 GAMING (MS-7821) (SOCKET 0) 33 °C

Graphics
-ASUS VS247 (1920x1080@60Hz)
-Acer P215H (1920x1080@60Hz)
-4095MB NVIDIA GeForce GTX 970 100ME (MSI) 30 °C

Storage
-476GB Crucial_CT512MX100SSD1 (SSD) 32 °C
-465GB Western Digital WDC WD5003ABYX-01WERA0 (SATA) 30 °C
-931GB Seagate FA GoFlex De USB Device (USB (SATA)) 37 °C

Power Supply
-EVGA 750W

Hi Everyone!

Looking for some help with my setup. I used to have the GTX 760. Just got the MSI GTX 970 100ME edition and it's been crashing my computer pretty consistently whenever I turn on a graphics intensive game. If I open up Paragon, it crashes before it loads. If I open up D3 I can play for 10 seconds before it crashes. When it crashes, there's no error message. It crashes like someone pulled the plug

Temps on Cores/GPUs are fine ~50*C on GPU and <50 for the CPUs. I hit around 1.25V/1200MHz when playing turning one of these games on. Using Speccy and Afterburner to monitor.

I underclocked the core speed so that the "Boost" (stupid thing) would be as high as I needed it for playing league ~1100MHz. This got league to work fine (it was crashing whenever there were a lot of spells going out, or when the nexus explodes at the end).

I've been messing around with the Core Voltage, Core Clock and Memory Clock with MSI Afterburner, but cant seem to find a spot that will let me even turn on the games. (temp is always <55*C)

Any help or ideas would be great.
Thanks in advance!

 

[IdolizeDT]

1.25 volts is really, really high for 1200mhz. It might be shutting down due to instability from voltage problems. I'm not sure how to flash a GPU's BIOS, but I know you can, and would recommend it. It might revert that voltage to a lower setting. For comparison, I have a 980ti. When it boosts to 1326mhz, it is only at 1.1xx volts.