Just a little philosophy ...
Credit depends from performance of the computer. I have aprox. 20 credits for 1 unit on faster computer and aprox. 40 credits on slower.
But faster one needs 2 time more WU from crunching.
And result credit is the same.
If I'm right then the best will by my old Pentium III server which does 1 WU in 8 hours and it is enough to have 3 WU per day. But for my P4 I need aprox. 12 WU per day.
Please correct me if I'm wrong.




Watch your credit on WAP Handy/PDA http://slavko.sk/wap/seti

> Just a little philosophy ...
> Credit depends from performance of the computer. I have aprox. 20 credits for
> 1 unit on faster computer and aprox. 40 credits on slower.
> But faster one needs 2 time more WU from crunching.
> And result credit is the same.
> If I'm right then the best will by my old Pentium III server which does 1 WU
> in 8 hours and it is enough to have 3 WU per day. But for my P4 I need aprox.
> 12 WU per day.
> Please correct me if I'm wrong.

CLAIMED credit depends on the speed of the computer. GRANTED credit depends on what the other 2 people claim for any given work unit. On average, most work units should give you about the same granted credit. So a faster computer will still get you credit faster.



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Possibly the best stats site in the universe:
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The claimed credit is a combination of 2 different things:

1. the CPU time, so in fact the speed of the PC,
2. the benchmark result.

A fast PC will have a short CPU time but a high benchmark result.
A slow PC will have a long CPU time and a low benchmark result.

So, finally, I believe there should not be a hughe difference in claimed credit between a slow and a fast PC.

And that's it! To continue with my idea ...
I'm going today to buy Athlon 64, for what? Not for SETI@home2.
For S@H2 I may for price of Athlon 64 based PC buy lets say 4 P3 500MHz or something like that and I may claim 4 times more credit. And maybe I will not even pay so much for electricity, such Athlon 64 takes 80W ... and probably I may buy some old server with 4 P3 processors which takes 4 WU at the same time and since it is one box ... I don't have to continue.
From the beginning I don't understand that credit and now it is even worst ...

> So, finally, I believe there should not be a hughe difference in claimed
> credit between a slow and a fast PC.




Watch your credit on WAP Handy/PDA http://slavko.sk/wap/seti

> And that's it! To continue with my idea ...
> I'm going today to buy Athlon 64, for what? Not for SETI@home2.
> For S@H2 I may for price of Athlon 64 based PC buy lets say 4 P3 500MHz
> or something like that and I may claim 4 times more credit. And maybe I will
> not even pay so much for electricity, such Athlon 64 takes 80W ... and
> probably I may buy some old server with 4 P3 processors which takes 4 WU at
> the same time and since it is one box ... I don't have to continue.
> From the beginning I don't understand that credit and now it is even worst
> ...

I think the difference in claimed credit between a fast and slow PC is due to the higher difference in benchmarking against the difference in CPU time.
I believe, but still have no proof for this unless I go digging in some old stuff of the Beta test, that finally a faster PC will have a higher claimed credit as the balance CPU time/ benchmark gives a higher value for a faster PC.

Sorry, hit button twice.

Thanks, I want to be sure that I'm wrong ;o))) And want to have clear in it. On other side, it's really not so bad idea with some farm of old computers from a few money...

> I believe, but still have no proof for this unless I go digging in some old
> stuff of the Beta test, that finally a faster PC will have a higher claimed
> credit as the balance CPU time/ benchmark gives a higher value for a faster
> PC.




Watch your credit on WAP Handy/PDA http://slavko.sk/wap/seti

These are my 3 PC's that have been running BOINC Seti During Beta & since the Site went Live...All 3 PC have been running Seti WU's 24/7 except for the 3.2 P4 which I switched to CPDN Beta 9 Days ago.

It is quite clear a Faster CPU will get Credit quicker than a slower one.

The 3.2 needs 14-15 WU's a day...HT Mode
The 3.06 needs 13-14 WU's a day...HT Mode
The 850 needs 3 WU's a day...No HT of course

From what I have noticed the 850 gets no more credit for a finished WU than the 3.2 or 3.06 even though it takes almost 4 to 5 times as long to complete a WU. It was my understanding when I first started the Projects that a slower PC could compete with a faster PC but that obviously is not the case. It may get the same amount of credit as a faster PC Per WU but the faster PC will pump out WU's at approximately a 4-5 to 1 ratio and get 4-5 times as much credit so theres no way a slower PC will compete with a faster PC based on that premise...

113.45...14017.80 Intel(R) Pentium(R) 4 CPU 3.20GHz Pentium
90.12....12271.29 Intel(R) Pentium(R) 4 CPU 3.06GHz Pentium
27.97....3379.82 Genuine Intel 851MHz Pentium

Looks then that I was wrong.
When I apply usage for my 2 boxes in % and count a little bit ... results are:
P4 2.66GHz with HT ... 96 credits for 1% of usage
Athlon XP 1700+ ... 67 credits for 1% of usage
Which is probably the same rate of as rate of its real power.
Right?
Ok, clear now.

> 113.45...14017.80 Intel(R) Pentium(R) 4 CPU 3.20GHz Pentium
> 90.12....12271.29 Intel(R) Pentium(R) 4 CPU 3.06GHz Pentium
> 27.97....3379.82 Genuine Intel 851MHz Pentium




Watch your credit on WAP Handy/PDA http://slavko.sk/wap/seti

A 486-33 MHz using 1000 hours on a wu and a 486-33 GHz using 1 hour on the same wu should "claim" the same credit. But the 33 GHz will have 1000x more "claimed" credit after 1000 hours. :)
Of course, you'll need longer deadline than currently in seti to expect getting any credit on the slow machine. ;)

The BOINC-benchmark isn't perfect, and even seti uses cpu-time other processes you're running alongside influences the cpu-time a little. Due to this some machines will normally always "claim" a little higher than they really should, while some always a little lower.

But crediting in seti is the middle claimed of the 3 passing validation, so it's already some averaged out. Over time this will be even better, so a computer that crunches 10 wu/day will have roughly 2x the credit as another crunching 5 wu/day.