Hello crunchers,

I currently have a GTX 260 core 216 getting 7,000 a day credit with a AMD Quad core 940 CPU.

What sort of real world numbers can I expect by going GTX 295 red edition? Or would it be better to go EVGA X58 MB and run another 260 Core 216 in SLI?

Looking for help, thanks in advance.

All the best,
Aaron Lephart

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SLI will give you zero points increase...
running 2 seperate 260's will give about 12000/day (basically double the single card... This is assuming you crunch with the CPU as well in that credit count)

GTX295 will give between 13000-14000 on its own... As long as you disable multi gpu mode and disable sli

Bob

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Do you Good Search for Seti@Home? http://www.goodsearch.com/?charityid=888957
Or Good Shop? http://www.goodshop.com/?charityid=888957

Thank you for the feedback. Do you disable SLI in the NVIDIA control panel or in a bios?

All the best,
Aaron Lephart

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I would guess, 1 x GTX295 and 2 x GTX260 Core216 the same RAC.
If both at stock speed. (To now I didn't saw an OCed GTX295)
AFAIK, the only difference between this two GPUs:
1 x GTX295 = 2 x GTX260 Core240
2 x GTX260 Core216 = 2 x GTX260 Core216 ;-)

Only more shader..
And this 24 more shader per GPU are not a big booster.

OTOH.. you could combine different GPUs in your PC.
You could take an OCed GTX260 Core216 which have more performance as 1/2 GTX295.
Or one GTX275/285.

Look to GPU core/shader/mem MHz and compare with prize.

Also think to your PSU that it have enough wattage and ampere.


How to disalble SLI.. don't know.
I have a MSI mobo with AMD chipset.. insert the 4 x GTX260 Core216 and everything well.
AFAIK, SLI work only with nVIDIA chipset mobo.
Or also with the cables which come with the GPU box also?
I'm not a gamer, so I don't have knowledge with SLI.. ;-)

But, after reading here.. you could/should disable SLI in the system tray icon of nVIDIA.


BTW.
For my OCed (by manufacturer) GTX260 Core216.. ~ 7,500 RAC/GPU.
Don't know really, because I couldn't let run ~ one month 24/7 (because of SETI@home unplanned server outages) for a stable RAC.

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SLI will give you zero points increase...
running 2 seperate 260's will give about 12000/day (basically double the single card... This is assuming you crunch with the CPU as well in that credit count)

GTX295 will give between 13000-14000 on its own... As long as you disable multi gpu mode and disable sli

Bob

Gonna go with Bob's quote here.
I now for a fact how efficient the GTX295 could be, got a few of them myself :).

Don't forget that the 260 separate in my knowledge has fewer Cuda GPU's than a single gpu board of the GTX295.
A 295 has 2*30 Cuda cores * the frequency of the shader and Oc'ed it can output nearly a result every 3.5 min aprox.

Kind regards Vyper

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_________________________________________________________________________
Addicted to SETI crunching!
Founder of GPU Users Group

AFAIK, both GPUs (1/2 x GTX295 and 1 x GTX260 Core216-55nm) are the same.
Only shader difference.

I have 4 x GTX260 Core216 [55nm] 3rd edition.
The old are with 65nm and the older with 192 shader.
The last (4th, current available) build of GTX260 Core216 have a 'cheaper PCB/building'.
(4 different 'editions' of GTX260)

Also the new GTX295 (I don't know if now available) have only one PCB on which are both GPUs.

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i heard the new GTX 295 have a higher power consumption then the old 2 PCB board versions anyone know what the power difference is?

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AFAIK, both GPUs (1/2 x GTX295 and 1 x GTX260 Core216-55nm) are the same.
Only shader difference.

I have 4 x GTX260 Core216 [55nm] 3rd edition.
The old are with 65nm and the older with 192 shader.
The last (4th, current available) build of GTX260 Core216 have a 'cheaper PCB/building'.
(4 different 'editions' of GTX260)

Also the new GTX295 (I don't know if now available) have only one PCB on which are both GPUs.

Hey

Could you check with Cuda-Z how many cuda cores you have with each GTX260.
If i'm not mistaking the 260 always has 27 cuda cores multiplied with the shader frequency.

The Gtx 295 has 30 per board inside the 295 resulting in 60 cores in total per 295 card

Kind regards Vyper

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_________________________________________________________________________
Addicted to SETI crunching!
Founder of GPU Users Group

http://setiathome.berkeley.edu/forum_thread.php?id=54300&filter=false#910427

:)

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SETI@Home Informational message -9 result_overflow
with a general handicap of 80% and it makes much d' efforts for the community and s' expimer, thank you d' to be understanding.

The GTX295 and GTX260 core 216 are not the same.
The 295 has 480 shader cores (240 per GPU chip) while the gtx 260 only has 216
Since they have the same clock speeds (the ones I compared were both non OC'ed)
The GTX295 will be approximately 2.1x faster (2 GPU chips which both have more cores)

Bob

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Do you Good Search for Seti@Home? http://www.goodsearch.com/?charityid=888957
Or Good Shop? http://www.goodshop.com/?charityid=888957

Found it, the GTX260 has a somewhat lower cuda cores than one of the 295 gpu boards..

"Device 1 : GeForce GTX 260
totalGlobalMem = 939196416
sharedMemPerBlock = 16384
regsPerBlock = 16384
warpSize = 32
memPitch = 262144
maxThreadsPerBlock = 512
clockRate = 1458000
totalConstMem = 65536
major = 1
minor = 3
textureAlignment = 256
deviceOverlap = 1
multiProcessorCount = 27"

Cuda cores = 27

GTX 295:

"Device 1 : GeForce GTX 295
totalGlobalMem = 939261952
sharedMemPerBlock = 16384
regsPerBlock = 16384
warpSize = 32
memPitch = 262144
maxThreadsPerBlock = 512
clockRate = 1476000
totalConstMem = 65536
major = 1
minor = 3
textureAlignment = 256
deviceOverlap = 1
multiProcessorCount = 30"

So i think you're about right popandbob but maybe a higher memory speed helps reducing the difference though.

Kind regards Vyper

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_________________________________________________________________________
Addicted to SETI crunching!
Founder of GPU Users Group

I don't know what you both talking about.. ;-)

If you look to the descriptions in internet, they say 216 (GTX260 Core216) and 240 (1/2 GTX295) cores.

The 27 and 30 in the BOINC outputs are all the time 1/8 from this cores.

I don't know how it's measured, or because of what.


I didn't said here that a GTX260 Core216 have the same performance like a GTX295!

I said:
1/2 GTX295 have ~ the same performance like a GTX260 Core216.

1 GTX295 have ~ the same performance like 2 x GTX260 Core216.

I said something different?


BTW. GPU-Z say me 216 Cores for my GTX260 Core216.. (why there should be something different?)


BTW. You took your and my OCed GPUs (from the BOINC output). I was talking (there and here) about stock speed, not overclocked GPUs!
Because there are no OCed GTX295 out there from manufacturer!


BTW. I guess you both misread my 1/2.. this mean 50 % ! ;-)


BTW. If you read the reports about the GTX295 they say that's the same chip (of course x 2 !) like in the 3rd/4th edition of GTX260 Core216.
Only difference is the shader. It's easy for a manufacturer to enable/disable shader.


BTW. Vyper, if you think - I think GTX260 Core216 and GTX295 are the same, why isn't my PC at top_host #1? ;-)



---------------------------------------------------
@ Anton Sutterlueti
I didn't read about power consumption for the new GTX295.
It could be right that the new take maybe ~ 10 or 20 W more as the old one.
Because, the new GTX260 Core216-55nm [3rd] take ~ 10 W more than the old GTX260 Core216-65nm [2nd].

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Maybe about crunching performance..

An AR=0.44x MB WU is in ~ 405 sec. finished at my OCed GTX260 Core216.
Shorties (AR=1.32x) in ~ 165 sec.


How with your (manually OCed GTX295 (1/2))?

Maybe you need to OC not only the shader speed, maybe also GPU and mem? ;-)


BTW.
If you (all) read my posts in this thread.. there are here and there some kidding areas.. ;-D

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Thank you for the feedback. Do you disable SLI in the NVIDIA control panel or in a bios?

All the best,
Aaron Lephart

Not in the Bios, One disables SLI in the Nvidia Control Panel. Oh and I have a BFG GTX 295, An older one with a gpu on each board.

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The T1 Trust, PRR T1 Class 4-4-4-4 #5550, 1 of America's First HST's

is the GTX 295 (single PCB) not *2 GTX 275 cores runing at GTX 260 216SP 55nm speeds etc

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Hello again!,

I just installed a new EVGA GTX 295 CO-OP graphics card today! No real results as of yet but when I tried overclokcing from 576Mhz to 580Mhz I got a BSOD. Is the stock configuration that far on the edge?

All the best,
Aaron Lephart

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