Do this because it is worthwhile; however, I am also competitive and results driven. I know the tail should not wag the dog but,I bought a GTX 580 solely for this project.

Can't even finish a WU in less than 24 hrs. :(

My RAC is dropping like a lead balloon.

Yes, your 450 is a bit on the slow side but you already new that :-)
It looks like the WUs running on your 580 are finishing in less than 24 hours it is that your cache is pulling new WUs as soon as the it can so they sit for a while and your 450 exacerbates the situation. For that rig you will be better off reducing the cached, pulling the 450, and run the 580 in the first slot to get the full speed of PCIEx16. If you are run with 2 cores free (1 per GPU) and you leave it that way I'm going to guess that you'll easily make more points overall (and who doesn't like a nice RAC) when you start to regularly collect time bonuses.
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Thanks - Steve

I had that problem before, reduce your cache in BOINC to 0.01 or 0.05 days and it will only request a new task right before the current one finishes.

Thanks for the hints. I have adjusted my caches, good tip. However, the problem is not with my rig. I regularly turn in over 300,000 points per day. I think I am #1 in RAC for KWSN team by a long margin.

I did run some WUs with only the 580 GTX in place and then with the both the 580 and 450 GTS installed, no degradation to the 580's processing time, although the BOINC system reports I have 2 450s in place, whatever.

I use the 450 to pre-crunch the WU and then transfer it to the 580 to finish in less time. I am SWAN_Synced and optimized as far as my knowledge and budget will permit.

My minor whinge is that is that a PAOLA_3EKO_8LIGANDS will not finish in less than 24 hours on a 580 GTX. To use modern parlance:

What's up with that? .

My EVGA 660 Ti will be here in 2 days, watch this space

gdf, I have 2 of 4 cores free.

Klepel, I bought it from the EVGA website just the plain base 660 TI, this was the only variety in stock. Model number is 02G-P4-3660-KR. I wanted an FTW but all enhanced 660 TIs were marked "Notify me". I hit the buy now button while there were still some available. You might have noticed I am slightly impatient. (Also, its a luxury at $300)

I will keep you updated.

Appreciate all the support,

Russell

even if you free one cpu core for gpugrid?

afaik SWAN_SYNC is no longer necessary for max performance. Somebody know for sure?

660 Ti installed and running with driver 306.02. At present a PAOLA_3EKO_8LIGANDS has completed approx 16.5% in 3 hrs So we can expect the WU to finish in a little over 19 hours.

No other graphics cards installed and no other BOINC WUs running.
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afaik SWAN_SYNC is no longer necessary for max performance. Somebody know for sure?

660 Ti installed and running with driver 306.02. At present a PAOLA_3EKO_8LIGANDS has completed approx 16.5% in 3 hrs So we can expect the WU to finish in a little over 19 hours.

No other graphics cards installed and no other BOINC WUs running.

Supporting my theory ...... the lesser Kepler GPUs suffer less performance loss with these PAOLA_3EKO_8LIGANDS than the faster ones.

Supporting my theory ...... the lesser Kepler GPUs suffer less performance loss with these PAOLA_3EKO_8LIGANDS than the faster ones.

Lesser? Careful you might offend my brand new GPU!