Anyone running SETI on a dual Celeron...what's your average WU times?

[Confused]

I've got an Abit BP6 which did have a single 500 on, and it was averaging around 14-15hrs with the CLI.

I have now changed to dual 400s, and they seem to be averaging about 21-22hrs! :Q I know that it would take a slight hit due to memory bandwidth contention and 100MHz lower CPU speed...but slowing down by about 6-7hrs! :Q

Specs are as follows:
Abit BP6
Celeron 400 (x2)
128MB Crucial PC133 CAS2 ram
8gb Fujitsu HDD
Windows XP Pro (with all fancy things turned off...apart from System Restore)


What sort of times are people getting on dual celerons? And what could i do to get the times down?

ConfusedBW

 

[Fingers]

can you overlcock with that board? If you can get you memory timoings as aggresive as you cant hat will help. withboth cpu's fighting over the same memory bandwidtht hat could help a great deal.

 

[Confused]

Yeah it is an overclocking board. It will post @ 92 FSB (with 1/3 PCI divider for 30MHz PCI) for 552MHz, but it crashes once in Windows after about 5 minutes

It's at 72 FSB at the moment, for 433MHz, but even now it still crashes every now and then

Not sure whether i've set the RAM to CAS2 or not, will go check that now and maybe hover a nice big fan over it (it's sitting caseless on top of my 24 port hub at the moment!)

CBW

 

[conjur]

m/b sitting directly on top of a metal box? Or do you have some sort of non-conducting standoffs?

You know...after really using this place to learn about h/w over the last three months (just built my first PC from parts - dual Athlon), I feel like I could be in a Holiday Inn commercial now

 

[Confused]

Yeah, just to clarify, not DIRECTLY on top of the hub! There's the foam pad thingy that came in the motherboard box between them...but it was still crashing when in a case, so not a grounding problem causing the crashing.

 

[SoulAssassin]

<< I've got an Abit BP6 which did have a single 500 on, and it was averaging around 14-15hrs with the CLI.

I have now changed to dual 400s, and they seem to be averaging about 21-22hrs! :Q I know that it would take a slight hit due to memory bandwidth contention and 100MHz lower CPU speed...but slowing down by about 6-7hrs! :Q

Specs are as follows:
Abit BP6
Celeron 400 (x2)
128MB Crucial PC133 CAS2 ram
8gb Fujitsu HDD
Windows XP Pro (with all fancy things turned off...apart from System Restore)


What sort of times are people getting on dual celerons? And what could i do to get the times down?

ConfusedBW >>



That's pretty decent...my dual 533's are running 15-17 hours under 2K AS.

 

[Rattledagger]

To give you something to compare to, my dual-p2-333 MHz running at 66 MHz x5, cas3, win2k, uses 18.5h for a normal wu.
I think I found a couple of results then only one instance was run, and the smp-penalty seems to be 10%.

Let's see, 15h at 500 MHz gives 18.75h at 400 MHz
22 h is 17% penalty due to smp. If we take 14h this gives 26% penalty.

Based on this, and SoulAssassin's answer, it looks like small cache-size first gives 20% penalty, and afterwards smp-penalty is increased to 20%.

 

[CADsortaGUY]

My BP6 with celeron 366s OC'd to 550 running win2k does WU's in a tad over 12.5 hrs. I've heard that the 366's are better OC'rs than the 400+ celerons but i should still think you should be able to OC them to atleast the ~500 range. My guess would be RAM for the crashing - have you tried a different stick? OR.... maybe it needs more RAM. Win2k needs quite a bit and with running 2 CLIs it might need more. I run a Micron 256MB cas3 stick in mine.


see "beefcake" in my setiQ for basilisk420 - that is my dually

 

[ishmael2k]

From my experience the Cel 400s are/were poor O/Cers. The 366s will usually run rings around them, this is probably why you can't get them any higher.

I don't have anything to compare to your setup anymore (With the exception of a PII/400, but this is a single cpu pc running 98se) but I can tell you I was fairly surprised at the hit I took when I went from a single PIII/800 to a dual setup running at 860.

My PIII/800 would crunch wus in the 8.5hr range and as soon as I went SMP it jumped to 10.5hrs or more . This was with a memory jump from 133mhz to 143mhz and I have all the settings maxed as much as possible and still maintain reliability.

I am guessing the times are fairly in line with what they should be with a C400 SMP.

Rb

 

[htmlmasterdave]

I wish I had a fancy dualie rig