GTX 970 Voltage Issue

[BadBacon]

The Zotac GTX 970 Extreme AMP! Edition Card has been giving me lots of issues stability wise for the past couple of months. I just realized the voltage is restricted on the card to 1.21v. Now this is a lower restriction that was present with the reference and competitors cards. Is there a way I can bios flash this card to increase the voltage to its original limit. I swear this card has everything to help it OC stupid high but is limited by its current bios. 

Normal Factory OC:

CORE CLOCK 1404
MEMORY CLOCK 1800

VOLTAGE Lower than 1.2124 (Stable but why?)

Idle temps 38-42 C

Load temps 52-56 C

OC settings:

CORE CLOCK 1494 Mhz

MEMORY CLOCK 1930 Mhz

VOLTAGE 1.2124 (Not high enough to keep it stable for 2+hours)

Idle temps 38-42 C (Based on ambient room temps)

Load temps 52-56 C (Based on Ambient room temps)

[Seri]

best bet would be to look for an allready customized BIOS specific to your card. I modified one myself by coppiing the setting of another allready modified Bios for my card but i don't have the skills to fully customize my own.

[BadBacon]

That's my issue. I can't find a custom bios for the Zotac 970 Extreme AMP! Edition. I've been looking and I haven't really had much luck. If I can find one I can OC this card even higher and have it stable always. Actually if I had that extra headroom I'd be able to get this card to 1515 Mhz no problem. I would customize my own if actually knew how.