Bitcoin Forum
December 11, 2016, 04:34:10 AM *
News: To be able to use the next phase of the beta forum software, please ensure that your email address is correct/functional.
 
   Home   Help Search Donate Login Register  
Pages: [1]
  Print  
Author Topic: HD6790: can't downclock mem nor undervolt gpu  (Read 1511 times)
Qu4k3r
Jr. Member
*
Offline Offline

Activity: 40


View Profile
July 14, 2012, 05:04:34 PM
 #1

I have a rig with 3 vcards:
2x6790
1x5830

5830 can be downclock ram to 300mhz + undervolt gpu to 1.05v @870/300 successfully.

But it can't be done on 6790's, I want to do it in order to reduce stress and temp on their vrm but no succeed.

I tried with several driver versions for win7 x64 (11.1, 11.12, 12.1) using cgminer, and also tried linux BAMT.

Don't matter what ram freq nor what gpu voltage I set, they seem to be locked to 1050mhz and 1.19v

Any idea?

Thanks in advance  Wink
1481430850
Hero Member
*
Offline Offline

Posts: 1481430850

View Profile Personal Message (Offline)

Ignore
1481430850
Reply with quote  #2

1481430850
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
scifimike12
Sr. Member
****
Offline Offline

Activity: 304



View Profile
July 14, 2012, 05:55:21 PM
 #2

Try using MSI Afterburner.  Edit MSIAfterburner.cfg using Notepad and change UnofficialOverclockingMode = 0.  When you launch AB, click accept, and then try lowering your memory.  Then close AB and then launch it again.  Rinse and repeat until you get down to your desired value(s).
Qu4k3r
Jr. Member
*
Offline Offline

Activity: 40


View Profile
July 14, 2012, 06:37:29 PM
 #3

I tried AB before but all clocks showed "0" and couldn't change freq.

So I tried again and checked dummy plugs and I found the problem, resistor was a little bit loose.

Now both 6790 are set to 300mhz on ram, so gpu temp decrease 6~7ºC and VRM temp decrease 10ºC Grin

gpu vddc still seems locked to 1.19v but I guess there is no need to get it lower.

Thanks a lot!!!
Pages: [1]
  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!