20031212, 22:46  #12  
Nov 2003
3·5·11 Posts 
Quote:


20031212, 23:51  #13 
Sep 2003
Borg HQ, Delta Quadrant
2×3^{3}×13 Posts 
To get people to do LL tests. George figures if you get more credit for LL, then more people will do it.
And P4s don't suck at TF. My Celeron 2.0GHz does one about every 32 hours and is my best machine. Last fiddled with by PrimeCruncher on 20031212 at 23:52 
20031213, 00:20  #14 
Sep 2002
1226_{8} Posts 
With trial factoring, for 64 bits and below, P4s or Celerons with SSE2 are very slow for their clock speed but at 65+ they are superb.
A few of them could really boost TF ranking, maybe with specific optimizations the Athlon64s/Opterons will be able to be superb at both, and become super trial factoring CPUs. 
20031213, 00:36  #15 
Sep 2003
Borg HQ, Delta Quadrant
2·3^{3}·13 Posts 
Pehaps. But for purely TF purposes I think Celeron will be the best buy for some time. It has the best SSE2 optimizations (obviously, since Intel made it), it has the speed, and it has a low price tag. A Celeron node can be had for $150 where a similar P4 node would be at least $250 and I don't want to think about Athlon64/Opteron. But you are correct that they add a lot of power. Given 0.105 CPU years per current TF (is that still the figure, dsouza123?) my Celeron will push over 28 CPU years per year Note to self: complete farm and buy more nodes ASAP!!
Just goes to show that the answer is ALWAYS D: MORE BOXEN!! Last fiddled with by PrimeCruncher on 20031213 at 00:37 
20031213, 00:48  #16 
Sep 2002
2·331 Posts 
The .105 figure varies somewhat depending on the TF but it is very close.
I agree with you, until things change alot, right now the Celeron with SSE2 gives an excellent (perhaps best) bang for the buck at trial factoring. 
20031213, 01:56  #17  
Feb 2003
2×3×13 Posts 
Quote:
I just sent a P4 to get a couple of factoring exponents, the 2.4GHz reckons it will go from 60 to 67 bits in just over 28.5 hours... 

20031213, 03:06  #18  
Sep 2003
Borg HQ, Delta Quadrant
2·3^{3}·13 Posts 
Quote:


20031213, 04:49  #19 
Aug 2002
Texas
155_{10} Posts 
Too bad the server can't split the TF's up between the instruction sets... below 64 to non SSE2 machines and above to SSE2 machines. I tried to convince a friend who has a couple of dual processor Athlons and a dual 3 gig Xeon that he should physically transer factoring work between the two along these lines, too much work, oh well :) Then again if there were just a P1 factoring assignment I'd have him doing that.... 12 gigs of ram between these boxen is good

20031213, 14:07  #20  
Sep 2003
Borg HQ, Delta Quadrant
1276_{8} Posts 
Quote:


20031213, 14:40  #21  
Nov 2003
3·5·11 Posts 
Quote:
Last fiddled with by nfortino on 20031213 at 14:41 

20031214, 22:58  #22 
Oct 2002
Lost in the hills of Iowa
2^{6}×7 Posts 
The V4 server does NOT work well with the Factoroverride option  there have been a lot of "stuck exponent" problems that appear to be attributed to that. Scott is aware of it already, though  I suspect v5 will be more ... robust ,,, when dealing with that option.
I think it would take a Prime program change to say "well, if this is an Athlon do the TF up to 2^64 then hand it back in for a P4 or P4Celeron to work on the rest of the way" automagically. 
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