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Geforce GT740M Overclock - Page 3

post #21 of 44
The slow memory is holding the card back greatly. For perspective 7600GT from 2005 has more bandwidth. Your core as is as good as GT750.
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post #22 of 44
Quote:
Originally Posted by Marnes View Post

The weird thing is that, in Heaven benchmark, I could use the max settings from the OP without any problems. Only WoT so far is dragging me down to 100/200/0 (admittedly I stopped using any overclock after I made the thread until just now). It seems to be different for each game/program.

You need to run a thorough benchmark several times. I generally run Vantage, 3DMark 11 and a few other programs several times before I declare the overclock stable.
     
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post #23 of 44
Thread Starter 
Quote:
Originally Posted by ZealotKi11er View Post

The slow memory is holding the card back greatly. For perspective 7600GT from 2005 has more bandwidth. Your core as is as good as GT750.
I'm gonna make a totally uneducated guess and say that overclocking the memory clock should provide the most gain then. That's odd cause that's the clock that seemed to be causing issues above +200 (unless of course that's simply the limit of the hardware somehow).
post #24 of 44
Quote:
Originally Posted by Marnes View Post

I'm gonna make a totally uneducated guess and say that overclocking the memory clock should provide the most gain then. That's odd cause that's the clock that seemed to be causing issues above +200 (unless of course that's simply the limit of the hardware somehow).

Yeah. Each MHz in memory should yield you performance linearly because how slow your memory is.
Dont bother overclocking the core really.
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Ishimura
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post #25 of 44
Thread Starter 
Yeah no, I seem to have hit the limits now. I turned the core clock back up to +135 (max allowed), gave me a very slight boost and no issues. Increasing the memory clock above +200 always creates glitches, even if I also add 50mV. Seems +200 is the limit for the memory clock.
post #26 of 44
I would turn the core clock down and raise your memory overclock as much as possible, I believe you will have more gains from that in your scenario
    
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post #27 of 44
Thread Starter 
Quote:
Originally Posted by TheReciever View Post

I would turn the core clock down and raise your memory overclock as much as possible, I believe you will have more gains from that in your scenario
How does turning one clock down help? Leaving more power for the other?
post #28 of 44
Quote:
Originally Posted by Marnes View Post

How does turning one clock down help? Leaving more power for the other?

Exactly, on NBR some peeps can hit around +300 memory which is where your hurting the most as opposed to core clock
    
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post #29 of 44
Thread Starter 
Quote:
Originally Posted by TheReciever View Post

Exactly, on NBR some peeps can hit around +300 memory which is where your hurting the most as opposed to core clock
I'll try tinkering with a lower core and trying higher mem then.

On a different note, is there a name I can google for the phenomenon where, after applying a few different settings, at some point something seems to "snap" and I only get half the normal framerate? I can then change the settings again and again, but until I reboot Windows, I just get a crappy framerate. Then after a reboot, the settings that initially caused the snap now work fine. And those settings are never the same. It's kind of like there's a tolerance of only so many reconfigurations per boot.
post #30 of 44
What are your temperatures hitting ? Sounds like throttling which lenovo is quite aggressive on (at least for my machine)

Maybe use Intel XTU to undervolt the CPU and give yourself some overhead temperature wise
    
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