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hitting a wall on overcloking reference 5870

post #1 of 7
Thread Starter 
as above

the voltage is set at 1.3v

im getting 1000 core 1200 mem stable. anything above that will artifacts and/or hangs

the gpu is watercooled, stress temp at 44deg celcius

how do i get the mem to reach 1300mhz? wats the max voltage i can set for the 5870

help !!
 
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post #2 of 7
Quote:
Originally Posted by enrell View Post
as above

the voltage is set at 1.3v

im getting 1000 core 1200 mem stable. anything above that will artifacts and/or hangs

the gpu is watercooled, stress temp at 44deg celcius

how do i get the mem to reach 1300mhz? wats the max voltage i can set for the 5870

help !!
Without memory voltage hard moding, it's simply impossible because there's no software volatge control for the memory. You can try lower the core and increase the memory clock with combination of voltage adjustment. Too much voltage than needed to sustain the OC also will result in crashes.
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post #3 of 7
Thread Starter 
better performance thru core than mem o/c right?
 
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post #4 of 7
Quote:
Originally Posted by enrell View Post
better performance thru core than mem o/c right?
That's right. With higher memory clock most likely memory will ECC kick in, when this happens you will see diminishing performance. Just find the sweet spot with various combination of core/memory/voltage as temperature is not your concern with the water cooling.
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post #5 of 7
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post
That's right. With higher memory clock most likely memory will ECC kick in, when this happens you will see diminishing performance. Just find the sweet spot with various combination of core/memory/voltage as temperature is not your concern with the water cooling.
yeah..i wonder wats the voltage limit for this gpu

afterburner has it at 1.35, i can adjust the max thru RBE though
 
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post #6 of 7
Quote:
Originally Posted by enrell View Post
yeah..i wonder wats the voltage limit for this gpu

afterburner has it at 1.35, i can adjust the max thru RBE though
Yes, editing BIOS for 58xx series are pretty easy unlike the 6xxx's.

I'd stay at 1.3v for and whatever stable core/memory clocks that voltage gives with watercooling. There's no reason to go max for daily 24/7 stressing the core/memory with marginal gain. Benchmarking is different story, what you need is just to get validation runs.
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ケンジ
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post #7 of 7
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post
Yes, editing BIOS for 58xx series are pretty easy unlike the 6xxx's.

I'd stay at 1.3v for and whatever stable core/memory clocks that voltage gives with watercooling. There's no reason to go max for daily 24/7 stressing the core/memory with marginal gain. Benchmarking is different story, what you need is just to get validation runs.
true dat..tanx man
 
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Thuban
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