I've had that question posed to me by a cruncher who's been away for a while and wants to comes back - but doesn't have enough RAC to post right now.

Not being a competitive type, I don't actually know the answer - but I'm sure it'll spark a lively debate.

Open to the floor.

Given the popularity of the GeForce GTX 780 with the top crunchers I am going to guess it is one of the top performers for SETI@home.

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SETI@home classic workunits: 93,865 CPU time: 863,447 hours
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This may help. And the top of the pack is indeed the GTX 780ti.

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Its interesting to see that the Titan is almost the same as the GTX780, but about twice the price....
I think I'll be sticking with GTX780s for the foreseeable future.

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

From my experience and looking only within the GTX models and forgeting about the electric power usage.

All depends on your point of view.

Fastest, is the 780Ti no doubt about that, but if you look the price/performance there are few 780 (Classified/FTW,etc) that produces almost the same crunching power (actualy about -10% to -20% less) for a lot less cost.

On other hand if you are behind daily WU crunched, you must look for the 690, it´s still a winner due it´s 2xGPU dessing allowing you to pack a lot more crunching power in the same slot. But to use it you must be able to handle the front heat exaust not and easy task in some cases.

We all are waiting for the 790 to see if that changes.

About the Titan, it´s an incredible "monster" with a lot more DP capacity than the 780 but actualy as SETI does not use DP the diference is not so huge, if you crunch a DP project that sure will change.

Of course there are some AMI "monsters" arround but don´t see at this moment any big SETI host who actualy use them so it´s hard to tell about, maybe some AMI fan could help us with that.

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Top GPU's list says something, but looks like it does not
a) recognise anonymous platform GPUS
b) take into account that most high end card users run often multiple tasks at a time.
c) separate MB/AP performance
according to a quick glance.

Titans advantage comes from full speed floating point calculation when using double precision performance and a few more SMXes.

Titans hinder is its smaller default GPU frequency.

AP/MB a)do not use much double precision and b) do use a lot single precision floating point calculation. On board memory access speed is a major factor too.

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To overcome Heisenbergs:
"You can't always get what you want / but if you try sometimes you just might find / you get what you need." -- Rolling Stones

Look at the top crunchers; it isn't which, it's how many.

http://setiathome.berkeley.edu/top_hosts.php

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Dont forget the R9 290x.

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With each crime and every kindness we birth our future.

Look at the top crunchers; it isn't which, it's how many.

http://setiathome.berkeley.edu/top_hosts.php

If you look down the list you will see even as the number of cards drops the same few cards are listed over and over.

Comparing the run time of the tasks is one of the more determining factors. After a while you can get an idea of how many tasks per GPU users are running on their machines based on the times.

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SETI@home classic workunits: 93,865 CPU time: 863,447 hours
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Dont forget the R9 290x.

I was looking at the results on a host with a R9 290X & the numbers look good, but it is the only one I have seen to check out so far.

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SETI@home classic workunits: 93,865 CPU time: 863,447 hours
Join the [url=http://tinyurl.com/8y46zvu]BP6/VP6 User Group[

Just a curiosity about the R9 290x, does anyone knows if it uses or not power from the PCI-E slot like the 7990?

Ask because in theory the fastest GPU avaiable for us almost normal users is the 7990 but it´s hard to build a multiple GPU cruncher with it because the 75W power drained from the PCI-E slot for each board.

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Dont forget the R9 290x.

I was looking at the results on a host with a R9 290X & the numbers look good, but it is the only one I have seen to check out so far.

From discussions on other boards, it seems likely that you need to be running BOINC v7.2.39 (still marked as a test version, but likely to be promoted to 'recommended' soon) for an R9 to be recognised.

My initial enquirer has asked me to pass on thanks to everyone for their help.

Just a curiosity about the R9 290x, does anyone knows if it uses or not power from the PCI-E slot like the 7990?

Ask because in theory the fastest GPU avaiable for us almost normal users is the 7990 but it´s hard to build a multiple GPU cruncher with it because the 75W power drained from the PCI-E slot for each board.

Yes, it does.

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With each crime and every kindness we birth our future.

Thanks Mike, that could explain why we don´t see multple GPUs hosts ussing this "monsters". AFAIK their crunching times are realy impressive, a lot faster than any NV equivalent.

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Look at the top crunchers; it isn't which, it's how many.

http://setiathome.berkeley.edu/top_hosts.php

Yes,

One can always start by dividing RAC by the number of cards. .. but one can not ignore the CPU. Add one from that to the divider.

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To overcome Heisenbergs:
"You can't always get what you want / but if you try sometimes you just might find / you get what you need." -- Rolling Stones

One can always start by dividing RAC by the number of cards. .. but one can not ignore the CPU. Add one from that to the divider.

The top crunchers use 6 core 12 "processor" CPUs and have tuned their machines and the software to crunch SETI 24/7 and nothing else.

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Dont forget the R9 290x.

I was looking at the results on a host with a R9 290X & the numbers look good, but it is the only one I have seen to check out so far.

From discussions on other boards, it seems likely that you need to be running BOINC v7.2.39 (still marked as a test version, but likely to be promoted to 'recommended' soon) for an R9 to be recognised.

My initial enquirer has asked me to pass on thanks to everyone for their help.

The cards are easy enough to find right now. As they are displayed with their GPU code name "[2] AMD Hawaii (2048MB) OpenCL: 1.02". On projects like Collatz, where ATI cards rule the roost, there are many more R9 290's in the top 100 of the machine list, but it is quite hard to compare the performance across projects.

I was temped by the R9 290's, but I like to keep the GPU in my gaming machine near the 150w mark. Right now the R9 270, which is 150w, is only about 15% faster in SP than my HD 6870. So I see no reason to upgrade.

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SETI@home classic workunits: 93,865 CPU time: 863,447 hours
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One more question from our returning cruncher:

Just one more question to you and or the group: If I try to run two GTX 780ti on the same computer will I have a heat or any other problem? Would I have to add anything else to the computer for instance to cool it? Like with other NVIDIA cards.

I know part of the answer to that one: try to buy cards which blow the exhaust heat backwards out of the case, rather than sideways across the motherboard (if you blow sideways, the second card heats up the first card by an extra 20 degrees - I've got one like that).

And supply them with plenty of power.

Just add... Use a very well ventilated case and a lot of fans... heat is the enemy of any GPU/CPU, cooler their run, faster their could crunch.

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Just add... Use a very well ventilated case and a lot of fans... heat is the enemy of any GPU/CPU, cooler their run, faster their could crunch.

+1

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