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OC-Problem on GT 740 SC 2gb

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Dziani

New Member
Joined
May 29, 2016
Hi everyone!

Im having problems with Overclocking my GT 740 SC 2gb
I boosted the core clock from 1058MHz to 1148MHz (90MHz increase)
The memory clock from 891MHz to 926MZ (35Mhz increase)

This is almost nothing but still I'm having problems in-game
All works fine until there is allot of action then the screen flickers
and my overclock resets and goes back to original

The temp never goes over 50c so thats not the problem...
I also tried to bump up the Voltage with +12,5mV (1 step) but the problem persist

Anyone experienced that has an idea what the problem is?

i5 4690k (clocked to 4.4GHz).
Gigabyte z97p-d3 mobo
Vengeance 8gb ddr3 (clocked to 1800MHz)
Fractal 450w <-- I know its low but should be enough?
 

Lochekey

Senior Pink Member
Joined
Sep 13, 2015
How did you go about OC the card did you raise things slowly and test along the way or did you go right to that overclock. Also have you stress tested the card with something like heaven to see if it is stable.

From what you describe the overclock is not stable on the gpu and it is causing a driver reset which is kicking you back to default settings.
 

Lochekey

Senior Pink Member
Joined
Sep 13, 2015
Well as I said it sounds like an unstable overclock.

I suggest starting over and using heaven as a stress test.

Start by running heaven with stock settings and record what score you get. Then start raising the core clock 10-15 at a time and then running heaven again. Continue doing this until you do not see an increase in the score or you see artifacts while testing. Back the core down 10mhz and that will be your max stable overclock. You can try increasing core voltage but in my experience the 740 does not respond well to voltage increases.

After finding the max core overclock do the same for the memory but work in 25mhz increments.

Remember to test along the way and keep good notes.
 
OP
D

Dziani

New Member
Joined
May 29, 2016
Yes thats right I actually went straight to it. I expected it to work because its such a small increase, its almost nothing.

I tested it with Furmark and it went fine. The problem seems to only affect in-game.
Why is it unstable? It should do super fine with this minimal clocking.

I've tested different software: Precision X , MSI Afterburner and Nvidia inspector.

- - - Updated - - -

Okey thanks. Well then my problem is that my GPU cant overclock.
If this is my max then its almost nothing...
 

Lochekey

Senior Pink Member
Joined
Sep 13, 2015
Well you have to remember the base clock for that chip is 993 so it is already overclocked from the factory and then you are trying to increase it further. Second you are trying to push a low tier card so I would not expect to much from it.

You could also put the rest of your system back to stock and then try OC the gpu to eliminate the rest of the system from the equation.

You may also want to try different driver versions. The card may respond better to older drivers versus some of the new ones.

- - - Updated - - -

I checked my notes and my 740 responded best to driver version 355.82, yours may not act the same as mine but you can start there at least.
 
OP
D

Dziani

New Member
Joined
May 29, 2016
Okey i did not know that it is OC'ed from stock. I have tried older versions. Remember that i read a post in a forum about some that had better performance with a specific version but my problem persisted. I'll look in to it to see if it was the 355.82 version if not im going to try that.