Overclocking with SETI!


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Profile Jaaku
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Message 6947 - Posted: 12 Jul 2004, 12:49:04 UTC

Will overclocking lower the amount of CS you receave per WU?
And will it damage the results of the WU?

STE\/E [BlackOpsTeam]
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Message 6950 - Posted: 12 Jul 2004, 12:56:59 UTC
Last modified: 12 Jul 2004, 12:57:45 UTC

It's hard to say Jaaku, I'm sure some people have already tried it and know. Without being able to get into your results and see what you are getting for Claimed & Granted Credit you really can't compare the differences ... I don't think it would damage the WU only just run them faster ... IMO

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Message 6953 - Posted: 12 Jul 2004, 13:00:05 UTC

Jaaku,

I am not sure whether or not overclocking will have any effect on your
credits/WU, but depending on how much you overclock your machine, it could
produce erroneous data. I flirted with overclocking on several of my machines,
and found that the Intel platforms were much more forgiving than AMD platforms as far as overclocking, but I have found that on either platform, without going to extremes like liquid cooling or TEC cooling, about 5 to 7 percent is the highest I could go without the machine becoming unstable after a few days, and trashing my Windows install. I would say, overclock at your own risk. Happy crunching!

Daniel.

Profile Thierry Van Driessche
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Message 6954 - Posted: 12 Jul 2004, 13:06:06 UTC - in response to Message 6947.
Last modified: 20 Jul 2004, 12:32:19 UTC

> Will overclocking lower the amount of CS you receave per WU?

Hard to tell if this will have an influence on your claimed credit as it will higher the benchmark result but will lower the CPU time. Therefore, it is not sure your claimed credit will change.

On the other hand, it will not have an influence on your granted credit as it is the mid value of 3 claimed credits.

Greetings from Belgium.

STE\/E [BlackOpsTeam]
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Message 6955 - Posted: 12 Jul 2004, 13:12:00 UTC

Hard to tell if this will have an influence on your claimed credit as it will higher the benchmark result but will lower the CPU time.
=========

Not if you Benchmark first & then Overclock Thierry ... ;)

Profile Thierry Van Driessche
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Message 6959 - Posted: 12 Jul 2004, 13:26:26 UTC - in response to Message 6955.

> Not if you Benchmark first & then Overclock Thierry ... ;)

Agree Poorboy, but uhmmmmmm,
Benchmark results will be overwritten afterwards in a couple of days by running automatically.

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Message 6971 - Posted: 12 Jul 2004, 13:36:26 UTC

Hi

I have an AMD XP 2500+ running at 2100 Mhz and have the same Benchmark result as an XP 2800+.
No problems since over one year Beta Test.
But i think a to high frontside bus can bring some trouble.

greetz Mike

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Message 6978 - Posted: 12 Jul 2004, 13:47:55 UTC
Last modified: 12 Jul 2004, 13:48:51 UTC

Benchmark results will be overwritten afterwards in a couple of days by running automatically.
==============

My Pc's do their Auto Benchmarking on Friday mornings it seems, so it's not that hard to plan ahead and prepare for it by turning back the CPU to it's regular speed before hand. Plus there's always the way to manually Benchmark and Update if the Auto Benchmark slips by you ... The only thing that a Auto Benchmark that you didn't catch would do is to add a host that your not using in your Account.


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Message 6983 - Posted: 12 Jul 2004, 13:52:58 UTC

I have just started to overclock my CPU again, i have my 2.8GHZ running at 3.33GHZ @ only 34C running SETI.

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Message 6987 - Posted: 12 Jul 2004, 13:58:28 UTC

Something to be aware of is that highly overclocked machines may appear to be stable in day to day operation, but their floating point arithmetic units start to be unreliable. You could start submitting bad science.

Just a heads up.
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Message 6995 - Posted: 12 Jul 2004, 14:16:02 UTC - in response to Message 6983.
Last modified: 12 Jul 2004, 14:16:21 UTC

> I have just started to overclock my CPU again, i have my 2.8GHZ running at
> 3.33GHZ @ only 34C running SETI.


Nice. I've put lots of extra cooling in my machine and the best I've been able to do with my 3.06GHz machine is about 3.4GHZ at 45C. The only time I can get it down to 34C is when Seti's not running.





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Message 7004 - Posted: 12 Jul 2004, 14:31:10 UTC

Nice. I've put lots of extra cooling in my machine and the best I've been able to do with my 3.06GHz machine is about 3.4GHZ at 45C. The only time I can get it down to 34C is when Seti's not running.
==========

I can run my 3.06 P4 @ 3.450 Ghz with just Fan cooling if I want to,I run a 150/30 FSB ... it run about 47C at that speed when running BOINC Seti ... it will run a little cooler running Seti Classic though ...


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Message 7036 - Posted: 12 Jul 2004, 15:27:45 UTC - in response to Message 6987.

> Something to be aware of is that highly overclocked machines may appear to be
> stable in day to day operation, but their floating point arithmetic units
> start to be unreliable. You could start submitting bad science.
>
> Just a heads up.

If your result does not agree with two others, it will be rejected, and you will get no credit for it.

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Message 7069 - Posted: 12 Jul 2004, 16:17:50 UTC

My cpus a pentium 4 B 533Fsb, it been to 3.46GHZ before (in winter) and had to raise the voltage to 1.6, and the temperature reacher 42Cmax while running SETI. and its still air cooled but not suprising with the best HSF i could find and 5x80mm 1x120mm 2xpsu 1xgraphics and cpu fans :D

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Message 7097 - Posted: 12 Jul 2004, 18:39:13 UTC

I have a AMD XP2500M air cooled running at around 2.4Ghz. This has been fine running boinc for the past week or so no probs whatsoever :)
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Message 7135 - Posted: 12 Jul 2004, 20:14:41 UTC - in response to Message 6959.

> Benchmark results will be overwritten afterwards in a couple of days by
> running automatically.

Yep. It's just false economy to "doctor" your benchmarks. It's the real world operating conditions we're looking for here folks.


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Profile Jaaku
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Message 7176 - Posted: 12 Jul 2004, 21:34:55 UTC

well from 2.8GHZ to 3.33Ghz has sliced off 50 min WOW :D

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Message 7180 - Posted: 12 Jul 2004, 21:49:12 UTC

if you overclock your CPU make sure that Prime is working right, minimum 12 Hours i think, only for Info, to make sure your Computer is working right, and without Problems.




Greetings from Germany NRW
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Profile Jaaku
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Message 7182 - Posted: 12 Jul 2004, 21:53:07 UTC

I have for 6 hours, minimum is 6 :D

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Message 7227 - Posted: 13 Jul 2004, 1:39:54 UTC

What is the gain?

5% more 10% more? more more?

is there a need to by every 6 month new power supplies or new fan unit?
what is your loose:
keeping watching and watching, bibbering if not to hot an spend a lot of
time.
If you want speed, then simply add an other pc...

a 2000MHz and a 1000 MHz together makes more throughtput than an
"stressed" 21xx

It's summertime also, take a walk around, look at the sky and
enjoy to know the couples of pc can run alone and stable and faithfull

ric






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