Average RAC for GTX 670/680.?


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Profile arkaynProject donor
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Message 1295964 - Posted: 16 Oct 2012, 14:08:03 UTC

I am on the way back up with my 670/650Ti rig, will have to see where it will stop.
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Message 1296300 - Posted: 17 Oct 2012, 18:51:57 UTC - in response to Message 1295964.
Last modified: 17 Oct 2012, 18:58:08 UTC

Back when the GTX-200 series was 1st released, I had always thought that
the main difference between the 260/70/80 was the clock speed of the GPU,
the memory interface and the amount of cuda cores.
So as long as the amount of cores increased the output increased.
But this is not true with the 600 series, as we now have 3 times the cores
and not 3 times the output.

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Message 1296491 - Posted: 18 Oct 2012, 9:14:25 UTC - in response to Message 1294940.
Last modified: 18 Oct 2012, 9:23:37 UTC

Hi there.

One of my machines have a single non OCed 670 so i'll post some numbers.
Running 2 WU's in parallell = 0.5

Lower AR shorties takes around 130 seconds / WU gives around 25 credits. (AR = 4.319562)
Higher AR shorties takes around 148 seconds / WU gives around 28 credits. (AR = 2.716736)
Upper MID AR takes around 272 seconds / WU, gives around 50 credits. (AR = 1.122237)
MID AR takes around 580 seconds / WU, gives around 118 credits. (AR = 0.420551)
Lower MID AR takes around 856 seconds / WU, gives around 165 credits. (AR = 0.238529)

So that equals to:
86400/130 * 2 * 25 = 33230 credits
86400/148 * 2 * 28 = 32691 credits
86400/272 * 2 * 50 = 31764 credits
86400/580 * 2 * 118 = 35155 credits
86400/856 * 2 * 165 = 33308 credits.

If you add them all 33230+32691+31764+35155+33308 and divides by 5 = Median of 33283 credits and if you take into consideration that main distribution is shorties then you need to slighly lower the RAC..

There you have it then.
A single GTX670 stock clock gives around 33100 in RAC by itself 24/7/365.
Running setiathome enhanced x41z, Cuda 4.20

Mbcuda.cfg =
processpriority = abovenormal
pfblockspersm = 15
pfperiodsperlaunch = 200

Running on a 2600K @ 4GHZ non HT.

Kind regards Vyper



Thanx Vyper. This kind of number crunching is hard to come by in the Number Crunching forum:D

So Kepler finally shows it's true colors! Here's what your numbers are telling me:

GTX 670 (GK104) has ~50% more RAC than a GTX 560Ti (GF114), ie the chip it "should" have replaced.

"At 294mm2 GK104 is not Big Kepler... This is roughly 89% the size of GF114 [~330mm2], or compared to GF110 a mere 56% of the size. Inside that 294mm2 NVIDIA packs 3.5B transistors thanks to TSMC’s 28nm process, only 500M more than GF110 and largely explaining why GK104 is so small compared to GF110. Or to once again make a comparison to GF114, this is 1050M (53%) more than GF114..."
AnandTech

And both have a TDP of 170W. So you get (roughly) 50% more Seti performance in the same power envelope for a launch price that is/was $150 higher.

The numbers are finally starting to fall into place.

(670 launced at $400, 560Ti at $250)


Edit: This isn't gonna make sense to most, but I think "crooked" is norwegian for DIYers/modders/"hackers":)

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Message 1296763 - Posted: 19 Oct 2012, 0:43:58 UTC - in response to Message 1296300.
Last modified: 19 Oct 2012, 0:45:29 UTC

Back when the GTX-200 series was 1st released, I had always thought that
the main difference between the 260/70/80 was the clock speed of the GPU,
the memory interface and the amount of cuda cores.
So as long as the amount of cores increased the output increased.
But this is not true with the 600 series, as we now have 3 times the cores
and not 3 times the output.


So is my info correct or incorrect..?
The 270 out performed the 260 and the 280 out performed the 270
in SETI ouput because of what..? Not cores..?
Duh ok there is more math to it.. :(

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Message 1296883 - Posted: 19 Oct 2012, 13:20:45 UTC - in response to Message 1296763.
Last modified: 19 Oct 2012, 13:24:04 UTC

Let's start over.

First I'm gonna open Pandora's box and say (based on specs) I can't see how a 670 will do any better at Seti than a 660Ti. Their compute performance is an exact match. It's highly likely Seti crunchers need to forget about the 670 now that the 660 Ti is out (as far as Seti is concerned, NOT gaming)

Second, only compare same generation cards when doing core number and shader speed comparisons. For the 6xx series nVidia doubled the cores for the same amount of compute performance.

Third. There is no 270. There's a 275 that was actually better (at Seti) than the 280. So you can't go by model numbers either:)

Questions:
Are you dead-set on an RAC of 100k?
Do you pay your own power bills?
What's your budget for cards, power supply and case?

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Message 1297016 - Posted: 20 Oct 2012, 0:13:49 UTC - in response to Message 1296883.
Last modified: 20 Oct 2012, 0:17:20 UTC

I am not dead set on 100k, but certainly close to it.
Yes I pay my power bills and usually early.. :)
I have a CoolerMaster HAF case with 3 200mm fans.
I also have a CoolerMaster 1000 watt power supply.
Actually your wrong, there was a GTX-270.
It came out 1st and the 275 replaced it.
I have been keeping up with nVidia forever, because I am a gamer too.
Finally I agree the 660Ti is almost equal to the 670.
The only minor difference between the 2 is the memory interface.
The memory interface deals with bandwidth, the higher the better.
But that higher bandwidth is not needed for SETI performance.
The topic 670/680 was because I had read somewhere here
that the 670 could produce 100k by itself.
But I just bought 2 EVGA superclocked 560 Ti's and am
close to buying another set of them.
At present I have yet to run any GPU's with the modified app.
But that is about to change and I will be posting a new thread
next week on how to use Lunatics modified app and what I need.
Main reason I have yet to switch to Lunatics is, I have not seen
any instructions in laymens terms.

Grant (SSSF)
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Message 1297019 - Posted: 20 Oct 2012, 0:24:19 UTC - in response to Message 1297016.

Main reason I have yet to switch to Lunatics is, I have not seen any instructions in laymens terms.

You use something like CPU-z & GPU-z to determine exactly what type of processors you have & the instruction sets they support, you run the installer, select the most appropriate option for the CPU & GPU you have, select whether to run Multibeam, Astro Pulse or both, let it install.
____________
Grant
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Message 1297027 - Posted: 20 Oct 2012, 0:39:02 UTC - in response to Message 1297016.




I also have a CoolerMaster 1000 watt power supply.





You didn't say if you were going to put all four of your contemplated cards in the same case on the same power supply.

If you are, you might want to pay particular attention to the power draw of four superclocked GTX 560Ti's under "gaming conditions" or whatever heavy-use application you choose.

I don't know one way or the other; I'm just concerned that it might be an issue.

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Message 1297402 - Posted: 21 Oct 2012, 1:42:49 UTC - in response to Message 1297027.

Well actually as I stated in another reply that I have a MSI mb that has 5 PCI-X
slots, supports 4 double spaced cards as long as its a tower case.
That case and mb has a Corsair 650 watt power supply
I also have a newer Gigabyte mb that supports 2 PCI-E slots.
It is the one with the 1000 watt psu.
I plan on putting 2 560's in each system.
Originally when I bought the MSI and Corsair I had 2 GTX 260's.
Then I purchased a CoolerMaster 1000 watt and added a GTX-465.
So I feel I will have enough power for both.
Both mb's have AMD cpu's and proper cooling has always been important to me.
I always plan on overclocking, but never really see any noticable improvemants.
My main sytem now has a water cooled cpu, but water cools nothing else.
Noisy computers are not an issue with me..

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Message boards : Number crunching : Average RAC for GTX 670/680.?

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