Geforce GTX 660ti - 2G GDDR5/192 bit RAM - How many units at a time?


log in

Advanced search

Message boards : Number crunching : Geforce GTX 660ti - 2G GDDR5/192 bit RAM - How many units at a time?

Author Message
outlaw
Send message
Joined: 6 Mar 00
Posts: 43
Credit: 16,957,654
RAC: 72
Canada
Message 1315203 - Posted: 14 Dec 2012, 19:10:27 UTC

<type>CUDA</type>
<count>.5 ???</count>
</coproc>


How many units at a time do you have on your rigs?
____________

Grant (SSSF)
Send message
Joined: 19 Aug 99
Posts: 5565
Credit: 51,351,339
RAC: 40,650
Australia
Message 1315257 - Posted: 14 Dec 2012, 22:04:08 UTC - in response to Message 1315203.


2GB of RAM will allow you to do 3 at a time without slowing the system down for general useage.
My GTX460 with 1GB RAM does 2 at a time with no problems. I ran 3 at a time for a while, but every now & then it would run low on video RAM when things got busy & the system would hit a wall & barely crawl along till some video RAM was freed. With 2GB of RAM it would have run 3 with no problems.
____________
Grant
Darwin NT.

spitfire_mk_2
Avatar
Send message
Joined: 14 Apr 00
Posts: 425
Credit: 11,275,006
RAC: 8,741
United States
Message 1315321 - Posted: 14 Dec 2012, 23:49:14 UTC
Last modified: 14 Dec 2012, 23:50:06 UTC

I have GTX 460 2GB, you can run 6 easily, I think there will be enough RAM on the video card to run 7. Use GPU-z to watch your RAM on the video card.

I have switched to running just one though. It seems to work faster overall.

GPU-z: http://www.techpowerup.com/downloads/SysInfo/GPU-Z/




What to look for:


____________

Grant (SSSF)
Send message
Joined: 19 Aug 99
Posts: 5565
Credit: 51,351,339
RAC: 40,650
Australia
Message 1315325 - Posted: 15 Dec 2012, 0:09:49 UTC - in response to Message 1315321.

I have switched to running just one though. It seems to work faster overall.

For me on both the 460 & 560Ti, running 3 at a time gives the greatest throughput.
No matter how fast you can do 1 at a time, running 3 at a time will result in more being done per hour than just running one. It's slightly better than just running 2 at a time, two is much better than 1.
____________
Grant
Darwin NT.

spitfire_mk_2
Avatar
Send message
Joined: 14 Apr 00
Posts: 425
Credit: 11,275,006
RAC: 8,741
United States
Message 1315329 - Posted: 15 Dec 2012, 0:18:00 UTC - in response to Message 1315325.

I have switched to running just one though. It seems to work faster overall.

For me on both the 460 & 560Ti, running 3 at a time gives the greatest throughput.
No matter how fast you can do 1 at a time, running 3 at a time will result in more being done per hour than just running one. It's slightly better than just running 2 at a time, two is much better than 1.

Hey Grant. I think we talked about that before.

If I remember right I switched to running just one because I also play games so I needed the card to run a wu and game client at the same time.
____________

Profile Cliff Harding
Volunteer tester
Avatar
Send message
Joined: 18 Aug 99
Posts: 825
Credit: 46,516,210
RAC: 15,322
United States
Message 1315373 - Posted: 15 Dec 2012, 1:34:08 UTC
Last modified: 15 Dec 2012, 1:35:36 UTC

I have a GTX660SC/2Gb & a GTX460SE/1Gb running 3 tasks each with no problems, keeping 1 core free for GPU processing. As far as games, which are very simple, or watching DVDs I also suspend GPU processing via the Tools menu. When running 3 tasks temps are around under 68c for the 660SC and under 60c for the 460SE, GPU usage is at 99%. Always had problems running Cuda and playing games or watching DVDs at the same time.
____________


I don't buy computers, I build them!!

spitfire_mk_2
Avatar
Send message
Joined: 14 Apr 00
Posts: 425
Credit: 11,275,006
RAC: 8,741
United States
Message 1315447 - Posted: 15 Dec 2012, 5:55:08 UTC

Ok, some testing. Again. This is GTX 460 with 2048 MB (2 GB) of RAM on the video card.

1 wu


2 wu


3 wu


4 wu


5 wu


6 wu


7 wu


8 wu



Each wu uses about 238 MB of video ram.

____________

rob smith
Volunteer moderator
Send message
Joined: 7 Mar 03
Posts: 7674
Credit: 44,810,811
RAC: 75,838
United Kingdom
Message 1315497 - Posted: 15 Dec 2012, 9:33:37 UTC

Spitfire - your screen shots (if that's what they were) aren't visible.



While the GPU may be capable of holding a number of tasks in memory it will have a sweet spot in terms of performance, below which the processors aren't being fully used, and above which they are doing too much task swapping. You need to run a few WU through at each number and monitor their completion times, then work out the effective throughput in terms of WU per hour.

I did this some time ago on my 460, and while I could get four into the GPU memory the performance fell off so quickly above two it just wasn't worth it so I settled on two as being the optimum. From memory the execute times were something like 19mins for 1 task, 20mins for two, and 40mins for three tasks, which gave me three per hour, six per hour and three per hour respectively (I went no further as it was obvious that I'd hit a limit)
____________
Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

Richard Haselgrove
Volunteer tester
Send message
Joined: 4 Jul 99
Posts: 8275
Credit: 44,947,441
RAC: 13,538
United Kingdom
Message 1315515 - Posted: 15 Dec 2012, 10:22:06 UTC - in response to Message 1315497.

Spitfire - your screen shots (if that's what they were) aren't visible.

They're visible here (and I'm in the same country as Rob). My ISP is BT: it's possible that the problem is between Rob's ISP and the image server at i.imgur.com

WezH
Volunteer tester
Send message
Joined: 19 Aug 99
Posts: 78
Credit: 2,935,312
RAC: 13,773
Finland
Message 1315707 - Posted: 15 Dec 2012, 19:41:17 UTC - in response to Message 1315515.

Spitfire - your screen shots (if that's what they were) aren't visible.

They're visible here (and I'm in the same country as Rob). My ISP is BT: it's possible that the problem is between Rob's ISP and the image server at i.imgur.com


And they are visible here (and I'm in different country as Rob)
____________

zoom314
Avatar
Send message
Joined: 30 Nov 03
Posts: 44549
Credit: 35,414,057
RAC: 9,027
Message 1315890 - Posted: 16 Dec 2012, 5:57:51 UTC - in response to Message 1315707.

Spitfire - your screen shots (if that's what they were) aren't visible.

They're visible here (and I'm in the same country as Rob). My ISP is BT: it's possible that the problem is between Rob's ISP and the image server at i.imgur.com


And they are visible here (and I'm in different country as Rob)

Same here, If they'd been png files I'd think it was an old browser incompatibility problem, in any case I agree.
____________

rob smith
Volunteer moderator
Send message
Joined: 7 Mar 03
Posts: 7674
Credit: 44,810,811
RAC: 75,838
United Kingdom
Message 1316123 - Posted: 16 Dec 2012, 17:40:29 UTC

Blocked as adverts!!!

____________
Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

LordLagasse
Send message
Joined: 21 Oct 12
Posts: 1
Credit: 1,257,872
RAC: 10,447
United States
Message 1317740 - Posted: 20 Dec 2012, 19:01:21 UTC

How do you configure this?

Profile PAUL
Send message
Joined: 31 May 03
Posts: 1
Credit: 4,944,598
RAC: 5,599
United States
Message 1317816 - Posted: 20 Dec 2012, 21:01:53 UTC

I also have a geforce gtx 660ti - 2G GDDR5/192 bit RAM and can only run 1 seti unit at a time .I want to know how to set set it up to run more , I don't have lunatic and we can't download it now .
____________

outlaw
Send message
Joined: 6 Mar 00
Posts: 43
Credit: 16,957,654
RAC: 72
Canada
Message 1318163 - Posted: 21 Dec 2012, 14:44:10 UTC - in response to Message 1317816.

It's a simple change to an XML file, you'll get a detailed response from the pros here; and I do not believe you need a Lunatics build to configure this.
____________

Horacio
Send message
Joined: 14 Jan 00
Posts: 536
Credit: 60,061,474
RAC: 87,503
Argentina
Message 1318184 - Posted: 21 Dec 2012, 15:48:49 UTC - in response to Message 1318163.

It's a simple change to an XML file, you'll get a detailed response from the pros here; and I do not believe you need a Lunatics build to configure this.

While the change is easy, the file doesnt exist if you are running the stock apps...
As was said, you dont need to use the Lunatics optimized apps, but you need to use the anonimous plattaform which implies the creation of the whole app_info file and to loose the automatic upgrades of the stock apps... all this without a helper installer might be a serious burden for non advanced users...
____________

Richard Haselgrove
Volunteer tester
Send message
Joined: 4 Jul 99
Posts: 8275
Credit: 44,947,441
RAC: 13,538
United Kingdom
Message 1318189 - Posted: 21 Dec 2012, 16:07:51 UTC - in response to Message 1318184.

It's a simple change to an XML file, you'll get a detailed response from the pros here; and I do not believe you need a Lunatics build to configure this.

While the change is easy, the file doesnt exist if you are running the stock apps...
As was said, you dont need to use the Lunatics optimized apps, but you need to use the anonimous plattaform which implies the creation of the whole app_info file and to loose the automatic upgrades of the stock apps... all this without a helper installer might be a serious burden for non advanced users...

Or you could use the new BOINC 7.0.40-42 and new app_config.xml, and run multiple tasks without losing automatic updating.

spitfire_mk_2
Avatar
Send message
Joined: 14 Apr 00
Posts: 425
Credit: 11,275,006
RAC: 8,741
United States
Message 1318251 - Posted: 21 Dec 2012, 17:49:03 UTC - in response to Message 1317740.

How do you configure this?

I used the Lunatics installer. That created app_info.xml file that I edit to run the number of wu I want.
____________

Message boards : Number crunching : Geforce GTX 660ti - 2G GDDR5/192 bit RAM - How many units at a time?

Copyright © 2014 University of California