Should I overclock my factory o/ced gtx 260 216 ?

Questions and Answers : GPU applications : Should I overclock my factory o/ced gtx 260 216 ?
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| ganja |
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Message 924436 - Posted: 7 Aug 2009, 23:06:30 UTC

If so how do I do it and what do I use. I'm doing the long units in say 17+ a few sec now is that about right I'm useing the 2.3 drivers. And Im on an Intel I7 with 12gb Ram.

Thanks,

Ralph
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Fred W
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Message 924439 - Posted: 7 Aug 2009, 23:22:06 UTC - in response to Message 924436.  

Since it's factory overclocked it's probably pretty near to it's limit anyway so you'll likely not gain much. If you do decide to try it, the easiest tool I've found is EVGA Precision. Just lock the core and shader speeds together and move the slider - keeping an eye on the temps. I don't know it this will work under Win7 - it's been great on my Vista x64 system.

Just bear in mind that if you come unstuck, it's your problem...

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Joseph Monk

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Message 924454 - Posted: 8 Aug 2009, 0:29:23 UTC - in response to Message 924439.  

A factory OC probably still has a lot of room, both of mine did (factory OC to 625Mhz I pushed them to 710Mhz). Generally what they do is "bin" cards, those with the most OC potential go into their best OC model, those that couldn't OC much go to their stock models.

I always OC one piece at a time, find the max before it goes unstable. Put that piece back (IE core) then go find the max for memory. Once you know how far each piece can go, then you find the over all max.

Core is probably the most important piece for SETI so I start there. Put it up to the max you found (with all others are default). Then move shader or memory up to max. Test for stability. If it's good your lucky, it probably won't be. Drop one down a little. Keep going for stability. Once stability is found, start slowly moving the last one up just like the others. If you can get memory over 1200 that's really good (mine are at 1201) with core over 700Mhz (710Mhz here).

For stability testing you can use things like 3dmark, or any graphics intensive game. Just look for artifacts (things that should have gone away) and general play in the games. For long term stability testing, you can either play games all day, or I used SETI. My 260-216 would drop themselves to complete crap levels if the OC failed, so I ran it overnight, if it failed then adjust the OC some more.

You also want to look out for heat, both idle and full load (running everything it can, SETI can do a decent job of this). I'd say try not to go much over 70C full load, 80C I would be very weary of, but you also have to take into account room temp (ie if it's 30C in your room then 75C probably isn't bad, but if it's 20C in your room then 75C is probably a bit high).

Also, if you have more than one card, remember what one does for an OC isn't what the other will do. One of mine can go a little faster, but I like them to be the same so I dropped it down to the best the other card could do.
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Profile Sutaru Tsureku
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Message 924863 - Posted: 9 Aug 2009, 6:46:20 UTC


Just curious.. ;-)

I have no knowledge because of GPU OC..
If I used the EVGA tool.. the settings will be there only in the current Windows session?
After a reboot everything is away?
So I need to load maybe after every reboot a profile in the EVGA tool?

Or it work like some CPU OC progs, which write the Windows-saved settings after reboot into the (V)BIOS?


Also for only CUDA crunching..
It's maybe well to have some 'synchronously' core/shader/RAM speed?
Not only the highest possible?


My EVGA OCed GTX260-216 [55nm] running at 675/1458/1152 [core/shader/RAM]
[Stock would be 576/1242/999]
[IIRC, the 'old' 65nm chip have little less stock/OC speeds]

[http://www.evga.com/products/moreInfo.asp?pn=896-P3-1258-AR&family=Geforce]
[http://www.evga.com/products/pdf/896-P3-1258.pdf] [.pdf file, 1.41 MB]

A 0.44x AR WU in ~ 600 sec/GPU.


AFAIK, EVGA have the highest manufacturer OCed GPUs.



I have 4 GTX260-216, so they are very close on the mobo.
So not much space between the GPU case.
With only 2 GPUs, the temps were - ~ 5 °C.
Now ambient ~ 23 °C, fans AUTO @ ~ 60 %, GPU temps ~ 79 - 83 °C.

I read a report about nVIDIA_GPUs and they said, ~ 85 °C would be in the green area.
AFAIK, max. is 105 °C for nVIDIA_GPUs, right? But then I guess the GPU will clock down. Or shut down?


I could read maybe somewhere something officially from nVIDIA about max. GPU temps if 24/7 CUDA ?

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Fred W
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Message 924879 - Posted: 9 Aug 2009, 9:02:02 UTC - in response to Message 924863.  


Just curious.. ;-)

I have no knowledge because of GPU OC..
If I used the EVGA tool.. the settings will be there only in the current Windows session?
After a reboot everything is away?
So I need to load maybe after every reboot a profile in the EVGA tool?

Or it work like some CPU OC progs, which write the Windows-saved settings after reboot into the (V)BIOS?


The tool can be set to load at Windows Startup so the settings will be applied in the future through re-boots


Also for only CUDA crunching..
It's maybe well to have some 'synchronously' core/shader/RAM speed?
Not only the highest possible?


The core/shader sliders can be locked together. The RAM slider is separate. The GPU's can be synchronised (locked together) so whatever is set on one applies to all.


My EVGA OCed GTX260-216 [55nm] running at 675/1458/1152 [core/shader/RAM]
[Stock would be 576/1242/999]
[IIRC, the 'old' 65nm chip have little less stock/OC speeds]

[http://www.evga.com/products/moreInfo.asp?pn=896-P3-1258-AR&family=Geforce]
[http://www.evga.com/products/pdf/896-P3-1258.pdf] [.pdf file, 1.41 MB]

A 0.44x AR WU in ~ 600 sec/GPU.


AFAIK, EVGA have the highest manufacturer OCed GPUs.



I have 4 GTX260-216, so they are very close on the mobo.
So not much space between the GPU case.
With only 2 GPUs, the temps were - ~ 5 °C.
Now ambient ~ 23 °C, fans AUTO @ ~ 60 %, GPU temps ~ 79 - 83 °C.

I read a report about nVIDIA_GPUs and they said, ~ 85 °C would be in the green area.


If you leave the fan on a GTX295 on "Auto" the core temps stabilise at 98C on 100% load so I guess Nvidia consider that acceptable. For me, that is too much heat being pumped into the case so I manually set the fan to 100% and the cores ran between 80 and 85C.


AFAIK, max. is 105 °C for nVIDIA_GPUs, right? But then I guess the GPU will clock down. Or shut down?


I could read maybe somewhere something officially from nVIDIA about max. GPU temps if 24/7 CUDA ?


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| ganja |
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Message 924897 - Posted: 9 Aug 2009, 12:42:04 UTC - in response to Message 924879.  

I have another qeestion off this thread guy's ...
I have 2 9500 gt laying here can i add them to this box also and put them to work i have 2 open slots left if so haw do i do it.

thanks,

Ralph
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Message 924898 - Posted: 9 Aug 2009, 12:52:28 UTC - in response to Message 924897.  

Depends how many PCIe slots your motherboard has. If you haven't planned it deliberately then it's unlikely to have more than 2 so you will likely only be able to use one of your spare cards.

However many PCIe slots you have, just plug the cards in and see what happens...

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Message 924927 - Posted: 9 Aug 2009, 15:38:08 UTC - in response to Message 924898.  

ok I put 1 od the 9500 gt in started up windows 7 loaded the drivers windows sees both cards but boinc either runs the 9500 or the 260 not both could someone explain how to get both to work at the same time plz.

Ralph
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Message 924939 - Posted: 9 Aug 2009, 16:26:48 UTC - in response to Message 924927.  

ok I put 1 od the 9500 gt in started up windows 7 loaded the drivers windows sees both cards but boinc either runs the 9500 or the 260 not both could someone explain how to get both to work at the same time plz.

Ralph

You're using the latest drivers (as stated in your first post). There seems to be some debate about whether SLI needs to be enabled / disabled or doesn't matter (I have it one way, someone else has it the other). Try both.

It may also be necessary to extend the Windows Desktop onto the "second monitor" - that has been the case with previous versions of the drivers.

F.
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Questions and Answers : GPU applications : Should I overclock my factory o/ced gtx 260 216 ?


 
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