Last weekend I installed an ATI 4870 graphics card and managed to get it running, getting enough work units to give me about 600 credits a day (bit of a drop from the 2000 to 3000 I was getting on the CPU).

The problem I have noticed when I checked my Short and Long Term Debt numbers was that all of the Long Term Debts on my projects had all jumped to huge negative values, except MilkyWay.

AQUA = LTD = -5,946,236
Lattice = LTD = -4,842,055
SuperLink = LTD = -6,134,337
Docking = LTD = -6,223,776
Einstein = LTD = -6,533,664
QMC = LTD = -6,142,453
Ralph = LTD = -4,655,922
SpinHenge = LTD = -5,095,292
Cosmology = LTD = -193,304
MilkyWay = LTD = 0.000000

These figures have been slowly getting back to normal over the past week and now they show

AQUA = LTD = -2,332,272
Lattice = LTD = -781,569
SuperLink = LTD = -1,893,602
Docking = LTD = -2,062,450
Einstein = LTD = -2,234,407
QMC = LTD = -2,076,745
Ralph = LTD = -933,775
SpinHenge = LTD = -936,374
Cosmology = LTD = -10,368
MilkyWay = LTD = 0.000000

As you can see the LTD all went haywire.
It now seems to be sorting itself out and work has been downloading for most of these projects.

MilkyWay has had a constant Zero point Zero Zero (0.00) as a Long Term Debt all week since I installed the card.
I do get a few work units now and then but this seems to be due to the Short Term Debt (STD) going positive and needing some work, the LTD does not change.

From this I believe that I get very little work due to the LTD staying at Zero and the computer just not asking for work in the first place, and it would not matter if there was work available either if Boinc does not ask for it.

Has anyone else noticed anything similar on a multi project computer ???

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What do you have for project Resource Shares?

Don't forget that LTD calculations are scaled by a Resource Share factor.

For example; Say you have a thousand to one split in favor of MW compared to the other projects.

Every second another project runs increments MW's LTD 1000 seconds (and then normalized to zero for 5x CC's).

IOWs, in a very high bias share scenario the numbers tend to get big in a hurry when there is work for the low share projects onboard.

Alinator

When there is no work available for a project, BOINC recalculates the LTD and zero's it. Nothing to do with MW as such.

@ Alinator
I have a resource share of 600 (29%) with the next highest project at 250 (12%).

@ The Gas Giant
This resetting to zero of the LTD is that with the newest Boinc clients? As it does not do that on the older clients (5.10.xx).
I did update this Windows machine to the latest 6.6.20 client in order to run the GPU application (although that probably relates to CUDA).

I still do get some work when the Short Term Debt goes positive but the Long Term Debt stays at 0.0000 and does not change.

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@ The Gas Giant
This resetting to zero of the LTD is that with the newest Boinc clients? As it does not do that on the older clients (5.10.xx).
I did update this Windows machine to the latest 6.6.20 client in order to run the GPU application (although that probably relates to CUDA).

I still do get some work when the Short Term Debt goes positive but the Long Term Debt stays at 0.0000 and does not change.

I think the LTD recalc occured from 6.x.x onwards (but I haven't researched that). This was done to avoid massive LTD numbers. BOINC will ask for more MW work but will not try to catch up for the time lost when there was no work.

I don't like this approach and would prefer BOINC let the LTD build up to a maximum of a week (or so).