5870 mobility overclocking limits

[Wijkert]

Hi guys,

I am currently overclocking my gx740's 5870 mobility card. The CCC limit for the core is 860(700 default) and the unofficial overclocking limit with AB is 910. At 910 it is quite stable. I would like to have more headroom to see what the max clocks are. I tried using this program to extend the CCC limits, but had to use windows recovery since it would't boot after changing the registery. Do you guys know off any program that would extend the clock limits?

Thanks in advance.

 

[Wijkert]

Solved it! If you put '2' after the unofficial overclocking variable in the afterburner.cfg file the limits are extended even more, but powerplay is disabled. Since I only play games on this laptop powerplay is't that valuable anyway.

Edit: I spoke to soon. After a restart the extended limits are gone and the max core clock is 910 again. If you change the afterburner.cfg file while AB is running the extended limits are extended again (to 1185 mhz) but are gone after a restart. Anyone any idea how to solve this problem?

 

[Wijkert]

Since nobody posted a reply, I take there is no (easy) solution to this problem. Maybe I am to blame since I posted this thread in the wrong forum. Are there mods that can transfer this thread to Overclocking & Cooling?

 

[meran]

man u should check GPU temp and becarefull since this is a laptop and its cooling is limited u may end frying it if u leave it on the sofa.

 

[overclocker]

Download GPU tool and try that, it has no overclocking limit and as long as you have good laptop cooling I say go for the max overclock like me! my 4650 overclocks well!

 

[Wijkert]

man u should check GPU temp and becarefull since this is a laptop and its cooling is limited u may end frying it if u leave it on the sofa.

The temps are fine. The difference in temperature between 700mhz and 910mhz is about 3-4 degrees celcius on max load. After looping the crysis benchmark 99 times the max temp I get is 87 so thats fine. My room is only 18 degrees right now, maybe I will clock it down in the summer.