AMD 64/XP?
Intel P4/Xeon HT Enable/Disable?
I want to run \"hadsm\" in new PC.

Thanks.

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Right now mostly Sulfur units are being sent out. As for fastest, go to stat sites and examine what crunches the fastest. There are plenty of them out there, and they show a lot of good information.

Sulfur units take a lot longer than HADSM units, because they are 5 sections, and a lot more data, but the credits refelct that, also.

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Tough question. Up until the last month or so, the answer for a single model would be a highly clocked Pentium 4 running Linux. For total throughput it would have been a highly clocked multiple Xeon workstation running Linux. For the Pentium 4, running hyperthreading helps throughput. For a multiproc Xeon, it does not appear to help much if at all. In Windows only, the above would also be true.

Recently, with the latest compilation of sulphur, in WinXP this has changed some. A highly clocked Athlon64 would probably have the fastest single model runtime while a multi CPU highly clocked Opteron system would have the best throughput (most model years in a given period of time). Of the dual core CPUs, the Athlon64 X2 4800+ would probably beat the high end dual core Intel CPUs.

In Linux, the new version of sulphur is problematic. It\'s a little faster than the old version on AMD, but much slower on Intel than it used to be. It\'s going to be recompiled so that the Intel performance will again be good.

But since this is in the Windows forum, the 2nd paragraph applies to your question.

To get you started
Running a Dell 840ee HT enabled 3.2 3 gig 667m ram win xp



Time Sent (UTC) Host ID Result ID Result Name Phase Timestep CPU Time (sec) Average (sec/TS)
19 Dec 2005 17:59:52 257345 1361519 sulphur_eopw_000685220_0 1 172,832 728,287 4.2138
19 Dec 2005 15:01:47 268890 1435915 sulphur_fnqr_000730611_0 1 140,426 631,403 4.4963
19 Dec 2005 10:49:54 268890 1299058 sulphur_ddae_000623750_0 2 183,634 1,876,103 4.2361
19 Dec 2005 09:21:01 257345 1309209 sulphur_dl3m_000633874_0 2 75,614 1,426,239 4.2592
19 Dec 2005 06:20:12 268890 1298737 sulphur_dd1h_000623429_0 2 129,624 1,664,991 4.2816
19 Dec 2005 05:20:42 257345 1361519 sulphur_eopw_000685220_0 1 162,030 684,713 4.2258
19 Dec 2005 05:20:35 268890 1306022 sulphur_dinf_000630699_0 2 43,208 1,302,023 4.3048
19 Dec 2005 01:19:55 268890 1435915 sulphur_fnqr_000730611_0 1 129,624 582,381 4.4928
18 Dec 2005 21:20:55 268890 1299058 sulphur_ddae_000623750_0 2 172,832 1,828,771 4.2325
18 Dec 2005 20:27:39 257345 1309209 sulphur_dl3m_000633874_0 2 64,812 1,382,406 4.2659
18 Dec 2005 16:49:09 257345 1361519 sulphur_eopw_000685220_0 1 151,228 641,329 4.2408
18 Dec 2005 16:48:58 257345 1265032 1j56_100092200_1 3 259,248 1,744,707 2.2433
18 Dec 2005 16:20:31 268890 1298737 sulphur_dd1h_000623429_0 2 118,822 1,617,133 4.2773
18 Dec 2005 15:20:18 268890 1306022 sulphur_dinf_000630699_0 2 32,406 1,254,361 4.3009
18 Dec 2005 10:49:17 268890 1435915 sulphur_fnqr_000730611_0 1 118,822 533,862 4.4930
18 Dec 2005 09:48:54 257345 1265032 1j56_100092200_1 3 248,446 1,719,921 2.2426
18 Dec 2005 07:48:57 257345 1309209 sulphur_dl3m_000633874_0 2 54,010 1,337,101 4.2684
18 Dec 2005 07:20:04 268890 1299058 sulphur_ddae_000623750_0 2 162,030 1,780,982 4.2276
18 Dec 2005 02:57:32 268890 1298737 sulphur_dd1h_000623429_0 2 108,020 1,569,365 4.2731
18 Dec 2005 02:49:10 257345 1265032 1j56_100092200_1 3 237,644 1,694,989 2.2416

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BOINC Wiki

other than crazy XEON/Opteron multi-processor systems......

a O/C\'d DC A64 or socket 939 opty would be the fastest

my DC opty 175 is the fastest machine on the spin-up model currently but it is O/C to 2.85 gHz...................

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http://climateapps2.oucs.ox.ac.uk/cpdnboinc/cpu.php
I saw this page.
AMD Athlon 64 3000+ is the fastest? (without MAC)
(Macintosh\'s CPU is very fast in integer and float!!!)

And,
Vendor is AMD Athlon 64
Model is Pentium
What does it mean?
\"Pentium\" is Intel\'s Trademark.

Thank you for the answer.

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The results you saw at that link were run under an old version of BOINC (thus the ridiculous labelling of Pentium for AMD processors), with an old version of climateprediction application (the relative speeds of one CPU vs. another has changed recently). Also, at the top of the list are a bunch of PCs that weren\'t really that fast. Some type of error.

As for the BOINC benchmark numbers (MFlop, MIop), older versions of BOINC gave higher numbers than newer versions, and Windows gives higher numbers than Linux. Yet, those benchmark numbers have little to nothing to do with cpdn performance.

Thank you, geophi.

AMD is faster than Pen4 in float.
Which power does it need. float or integer?

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AMD is faster than Pen4 in float.
Which power does it need. float or integer?

Float, but memory bandwidth and latency are also very important. In the early days of BOINC CPDN, Intel was faster because the Intel compiler wouldn\'t allow SSE and SSE2 on AMD CPUs. The latest versions now do and AMD is faster.

For Pentium M (not Pentium 4M), CPDN is the ideal project, they perform much better than expected from the benchmark results. They are probably not the top performers but sure amongst the best - and they must have a very good Trickle/Watt ratio.

My not overclocked Banias 1600 needs 2.38 sec/TS for a HadSM3 Slab model and that\'s one of the slow Pentium M.

Lyrical-Nanoha
No one has mentioned it yet, but there aren\'t any hadsm at the moment. It\'s all sulphur_um. Longer and slower.
And soon to come: the coupled ocean model.

What I should have added was, make sure that the computer is stable.
A large heatsink/fan, lots of airflow through the case, and a large power supply so that the voltages don\'t sag under continuous use.
All just as important as speed.

Thank you.
I\'ll buy new PC and I\'m going to run CPDN.

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