Welcome to MilkyWay@home

GPU clocks running at half speed despite being overclocked

Message boards : Number crunching : GPU clocks running at half speed despite being overclocked
Message board moderation

To post messages, you must log in.

AuthorMessage
Mel S Stark

Send message
Joined: 20 Dec 09
Posts: 2
Credit: 107,671,523
RAC: 0
Message 48394 - Posted: 1 May 2011, 13:39:50 UTC

[color=blue]I have a GTX 480 and a GTX 285 both crunching Milkway two workunits at a time. Both of my graphics clocks run at half speed while crunching. Is that normal or is something misconfigured? The same thing happens for SETI and Collatz.[color=blue]
ID: 48394 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Siegfried Niklas

Send message
Joined: 27 Apr 08
Posts: 3
Credit: 104,258,152
RAC: 0
Message 48395 - Posted: 1 May 2011, 13:54:44 UTC - in response to Message 48394.  

[color=blue]I have a GTX 480 and a GTX 285 both crunching Milkway two workunits at a time. Both of my graphics clocks run at half speed while crunching. Is that normal or is something misconfigured? The same thing happens for SETI and Collatz.[color=blue]


I had this problem after installing the NVIDIA Driver 270.61 (WHQL).
After going back to 266.58 (WHQL) the problem disappeared.

ID: 48395 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Zydor
Avatar

Send message
Joined: 24 Feb 09
Posts: 620
Credit: 100,587,625
RAC: 0
Message 48396 - Posted: 1 May 2011, 13:56:39 UTC
Last modified: 1 May 2011, 13:57:13 UTC

Normal in terms of time. There's no free lunch as they say :) When two WUs are loaded, they get half the card's crunching output each. So recorded time is twice as long, but twice the WUs are produced - net result is the same as one WU loaded, no gain as such...

However, there can be a very slight gain depending on all sorts of factors of 2-3%, can be more.

Essentially 2 WUs loaded complete in twice the time = same time as for one.

Regards
Zy
ID: 48396 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Mel S Stark

Send message
Joined: 20 Dec 09
Posts: 2
Credit: 107,671,523
RAC: 0
Message 48424 - Posted: 2 May 2011, 0:35:55 UTC - in response to Message 48395.  

Very cool. Those new drivers didn't fold proteins well either. Thanks for your advice
ID: 48424 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote

Message boards : Number crunching : GPU clocks running at half speed despite being overclocked

©2024 Astroinformatics Group