P2605 vs P2608

Moderators: Site Moderators, FAHC Science Team

Post Reply
v00d00
Posts: 390
Joined: Sun Dec 02, 2007 4:53 am
Hardware configuration: FX8320e (6 cores enabled) @ stock,
- 16GB DDR3,
- Zotac GTX 1050Ti @ Stock.
- Gigabyte GTX 970 @ Stock
Debian 9.

Running GPU since it came out, CPU since client version 3.
Folding since Folding began (~2000) and ran Genome@Home for a while too.
Ran Seti@Home prior to that.
Location: UK
Contact:

P2605 vs P2608

Post by v00d00 »

Is there any particular reason the points on P2608 are less than P2605, while the amount of work done is more?
p2605_Protein in POPC 77373 3.00 4.00 1760.00 100
P2608 126010 4.00 4.00 1385.00 100
My computer frame times on both Projects.
P2605 - AMD X2 6000 @ 3.2GHz - 18mins 20secs / frame
P2608 - AMD X2 6000 @ 3.2GHz - 37mins 2secs / frame
Is this the initial push to phase out the bonus workunit (and yes, ive only just noticed this, and may be asking a dumb question ;) )?
Image
_ikki_
Posts: 27
Joined: Wed Dec 05, 2007 8:38 am

Re: P2605 vs P2608

Post by _ikki_ »

Maybe the benchmark machine is the reason of this amount of point
Team #35819 P2P-Community
ChasR
Posts: 402
Joined: Sun Dec 02, 2007 5:36 am
Location: Atlanta, GA

Re: P2605 vs P2608

Post by ChasR »

P2608 is a cache intensive WU and the AMD rig you're running it on doesn't have enough cache.

On a Q6600, Ubuntu 7.04, 3.33 GHz, 2 GB ram @ 920 MHz, 4-4-4-12
p2605
TPF: 6:53.2
PPD: 3680.6

P2608:
TPF: 5:30.0
PPD: 3626.2

The benchmak machine is not a Q6600, but a the benchmark machine, a Woodcrest duallie @ 2.33, has the same 2 MB cache per core, which appears to be crucial to p2608 and p2609.
Image
Flathead74
Posts: 266
Joined: Sun Dec 02, 2007 6:08 pm
Location: Central New York
Contact:

Re: P2605 vs P2608

Post by Flathead74 »

According to Intel's product brief, the 4MB L2 cache of a Woodcrest processor is shared, not discrete.

I believe this is where the performance advantage comes from, access to 4MB of L2 cache.

product brief
"4 MB shared L2 cache
• Entire L2 cache can be allocated to one core."

From the Folding@home SMP FAQ
"Before releasing any new project (series of work units), we benchmark it on a dedicated Macintosh Pro with 2 - 2.33 GHz Dual Core Xeon processors. (more specifically, 2 Woodcrest 5140 processors with 4 MB cache (each), 5 GB FBDIMM Memory (667 MHz DDR2), 1.33 GHz Bus)"
v00d00
Posts: 390
Joined: Sun Dec 02, 2007 4:53 am
Hardware configuration: FX8320e (6 cores enabled) @ stock,
- 16GB DDR3,
- Zotac GTX 1050Ti @ Stock.
- Gigabyte GTX 970 @ Stock
Debian 9.

Running GPU since it came out, CPU since client version 3.
Folding since Folding began (~2000) and ran Genome@Home for a while too.
Ran Seti@Home prior to that.
Location: UK
Contact:

Re: P2605 vs P2608

Post by v00d00 »

Thanks for the explanation guys. I guess i need to make some more upgrades, very soon.

:)
Image
Post Reply