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Safe voltage level for 5850 and 5830

post #1 of 8
Thread Starter 
Have couple Sapphire 5850 and 5830s.
What is the recommended voltage level that one should not exceed when overclocking? that is, above what voltage will one significantly increase the risk of burning out the chip?

Currently I am running 5850 at 1.25v.
It seems to me that 5830 have a higher default voltage than the 5850.
5850 default shows 1.088, while 5830 default shows 1.163.
post #2 of 8
I remember when I was first OC'ing my 5850, I asked around, and the general consensus was that going over 1.3v was not recommended. Also, I was told to try and keep it as far below 80C as possible. I'm not sure if the consensus has changed.

As far as the 5830 having a higher default voltage, I'm not sure why that is...
 
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post #3 of 8
Thread Starter 
It seems that pushing from 1.25 to 1.30 on my 5830 only gained me an extra 40MHz.
So, I guess I will stay with 1.25.
post #4 of 8
Ah yeah. I gave my 5850 1.25v and it maxes out at 950 frown.gif. My 5850 has never seen the beautiful 1GHz sad-smiley-002.gif...
Edited by onoz - 5/22/11 at 10:05pm
 
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post #5 of 8
Thread Starter 
My 5830 hit 1020MHz with 1.25v.
The best 5850 I got was 980 with 1.25v
post #6 of 8
At 1.243 my 5850 will get 975/1250 with max temp at 67c, at 1.3v i get 1050/1275 max temp 75c

And yes 1.3v atleast on my Asus 5850 top is said to be safe, but 1.35 is max that should be used.
    
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post #7 of 8
You also will want to keep an eye on the vddc temps when increasing the voltage. They are safe to about 120C.
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post #8 of 8
Nice overclocks. Do you have benchmark results with the 5850 and 5830 with max overclock? Would be interesting to compare them.
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