Can't get OC in stable in GTA V

[beany_bot]

OK this is driving me round the bend. Been at it all day now.

So I can get my OC stable at +155Mhz GPU, +550Mhz RAM [2100Mhz, 9.2Ghz] (no extra voltage, max power limit).
I can literally run heaven and Valley for hours and hours stable.

5 mins into GTA V and it crashes. In steps I've taken it all the way down to +140 and +500 trying to find stability in GTA V and tried increasing the voltage also but still it crashes (Its fine without an overclock).

How can there be such difference between "stress test" programs and GTA V?

Obviously GTA takes a lot longer to load than Valley so to say this is a pain would be an understatement...

 

[beany_bot]

Native res. Honestly I'm just going to run it stock. It's not worth it when I can get the same FPS boost by turning shadows from very high to high. I thought I had it then, then I got a BSOD after about 30mins. CBA with it. stock is fine.

 

[beany_bot]

Start from stock and go from there. It may be boosting quite high anyhow?

cba. Lifes too short Ive already lost a day chasing 4FPS. If I had spent it working I could have bought another card.