Bitcoin Forum
December 03, 2016, 05:50:24 PM *
News: Latest stable version of Bitcoin Core: 0.13.1  [Torrent].
 
   Home   Help Search Donate Login Register  
Pages: « 1 [2]  All
  Print  
Author Topic: Underclocking ATI Memory to reduce heat??  (Read 7841 times)
IronTomahawk
Newbie
*
Offline Offline

Activity: 15


View Profile
June 15, 2011, 10:15:26 AM
 #21

Is a known fact that undercloking the memory to 300 can raise the mh/s.
Where is your proof/evidence of this?  I'm running a 5870 with 950 core overclock and 1300 memory overclock which I lowered back to stock since it produced no increase in gaming performance or mining performance. I lowered the memory down to 800, 600, and 300.  Each time I gained no MHash/s, I actually lost about 1-2MHash/s each step I took down. I gain probably 1-2Mhash/s when I overclock to 1300 which isn't a big enough gain to bother with the extra heat. I'm using aftermarket cooling however (Artic Cooling Accelero Xtreme) so my temps max out at around 48-50 for all sensors overclocked (don't even see heat increase/decrease for memory with changes).
Exact. But try to go under 300, there is the magic. Between 140 and 190. Cannot tell you why but makes about 15 MHash/s on a 5870.  Wink
1480787424
Hero Member
*
Offline Offline

Posts: 1480787424

View Profile Personal Message (Offline)

Ignore
1480787424
Reply with quote  #2

1480787424
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
o_dima
Full Member
***
Offline Offline

Activity: 142


View Profile
June 15, 2011, 11:51:24 AM
 #22

...
if overlocking GPU to 890MHz or underclocking Memory to 600 MHz - it freezes completelly in several minutes...
...

I could not imagine, why to low Memory clock stucks the gpu. I think you gpu core clock is still to high. Overclocking is not an exact thing, you need time to find stable values. My 5850s do only 820 MHz without raising the vcore. Another thing is your power source. Don't think that you are good if you have a 500 watt source in your machine. You have to take a look at the values: 12V+, how many Amps you can take there? A single gpu should not be a problem, but 2 or more ... - surely.

Give AMD GPU CLOCK TOOL a try, set memory to about 180 MHz and core clock to 850, let it run for 2 days and your have a good start.

My power source - 600W, single GPU. Well thanks - will keep playng with settings, but I'm not the only one who have problems with underclocking Memory
Pages: « 1 [2]  All
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!