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Author Topic:   K6-2 vs. K6-3 for SETI
SubZero
Celeron Worshipper
posted October 25, 1999 20:53     Click Here to See the Profile for SubZero     Edit/Delete Message
I was wondering how much faster a unit could be completed using a K6-3 versus the K6-2. I am fixing to get a new chip and I am wondering which way to go. A K6-3 400 is about the same price as the K6-2 475. So is it better to go for the extra 75Mhz, or does the K6-3 offer better performance?

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Pierce
Follower of Athlon
posted October 25, 1999 21:11     Click Here to See the Profile for Pierce     Edit/Delete Message
From what I hear about how RC5 works you would be better served with the higher MHZ K6-2.

If you could manage a little extra cash go for a K7. I am waiting for some better motherboard venders to make Athlon boards myself.

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Pierce
Follower of Athlon
posted October 25, 1999 21:14     Click Here to See the Profile for Pierce     Edit/Delete Message
Oops... never mind that reply above.
Had RC5 on my mind and not Seti. Quite frankly I don't know which would be better as far as Seti goes.

Sorry

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Pieter
Follower of Athlon
posted October 26, 1999 12:46     Click Here to See the Profile for Pieter     Edit/Delete Message
i think K6-III are faster at seti.

------------------
Regards,

Pieter :*)

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daviddth
Follower of Athlon
posted October 26, 1999 03:04     Click Here to See the Profile for daviddth     Edit/Delete Message
The K6-III will just beat a K6-2, but it's close. Really the L2 cache is too small to make a lot of difference in Seti as the data is just too big to fit.

The K6-2+ (I think that's the name) should be interesting with the different size l2 cache - if one is 512k in size, S@h will FLY!

Dave

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Akma
Follower of Athlon
posted October 26, 1999 04:05     Click Here to See the Profile for Akma     Edit/Delete Message
Some theoretic discussion:

My machine crunches some 22 hours on a K6-III 400 (4x100) under Win98. My K6-2 350 (3.5x100) took some 28 hours to finish the unit. Which suggests that on my machine a K6-2 500 (5x100) would take 19.5 hours.

A K6-III is about 12% faster than a similarly clocked K6-2. Thus a K6-2 475 would probably be a bit faster on my machine than a K6-III 400 (somewhat equivalent to a K6-2 450). But you should notice that the nominal FSB speed for the K6-2 475 is 95 MHz.

Linux time for the K6-2 350 was about 18 hours.

If you are to do any RC5, then only the MHz matter not the K6-X model.

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Pieter
Follower of Athlon
posted October 26, 1999 12:01     Click Here to See the Profile for Pieter     Edit/Delete Message
My K6-III 400 allways did units between 16 and 18 hours.

Regards,

Pieter

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RAVE
Follower of Athlon
posted October 26, 1999 12:27     Click Here to See the Profile for RAVE     Edit/Delete Message
Here's a good comparison for you.

I had a K6-2 475 o/c 504 (4.5x112), and a WU would take between 20-22 hours.

I recently installed a K6-3 450 (same system) and now the WU takes between 16-18 hours.

Ray

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Sqiz
Follower of Athlon
posted October 26, 1999 16:25     Click Here to See the Profile for Sqiz     Edit/Delete Message
I'm using an AMD K6-2 3D!Now 475 o/c to 504MHz with 64MB of PC100 o/c to 112 and I never take longer than 15.5 hours !!!

Some WU's with no guassian's finish in as little as 13 - 13.5 hours. My advise is stop focusing on the CPU and concentrate on the memory speed (CAS = 2, edge rather than level) and a large L2 cache on the mbrd.

Once you get it stable (and I had to remove my 16MB AGP card and use a 4MB PCI instead), test it thoroughly.

Lastly remove the side of the PC case and stand next to a 42W tower fan for maximum cooling !!!

Sqiz. http://www.lakeside.force9.co.uk/Seti/setiteam.html

PS. Windows98 running the NT client and using SetiMULT for 24/7 with or without the server.

[This message has been edited by Sqiz (edited October 26, 1999).]

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CASC member
Follower of Athlon
posted October 26, 1999 19:20     Click Here to See the Profile for CASC member     Edit/Delete Message
My K6-2 350 does a unit in about 18.5 to 20 hrs avg. 128mb ram set at 8ns = 125mhz on a Asus P5A and Running W98. I only run SETI when i'm not using the computer.
I have also enabled VCache in the system.ini set at
Chunksize=512
MinFileCache=8192
MaxFileCache=16384

I'm not sure why but maybe its the board as from what i read my 350 seems a bit faster than the same chip on other boards.

any ideas ?

John

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RAVE
Follower of Athlon
posted October 27, 1999 12:25     Click Here to See the Profile for RAVE     Edit/Delete Message
I think the point of this thread was missed by some people. Who cares if your 350 does it in 5 hours.

The point is I substituted a K6-2 475 (o/c 504) with a K6-3 450 in the exact same system, and I gained 4 hours on WU process times which proves that the K6-3 is better at doing WUs than the K6-2.

Painfull that is...

Ray

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fredro
Follower of Athlon
posted October 27, 1999 15:28     Click Here to See the Profile for fredro     Edit/Delete Message
i think that what others are saying is, you can get the faster k6-3, but if its not configured properly, its no faster than the k6-2. i am guilty of that. i have 2 identicle system, k6-2 450mhz, fic 503+ mobo`s, and one does a wu in 15 and a half to 16 hours, the other does it in 18 to 20 hours, i havent taken the time to configure the other one, ive been busy building and fixing computers for freinds. (best excuse i can come up with)

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