I have two older Windows XP desktop computers that I have gotten from my parents house after I built them a new computer to use. On Sunday I figured out how to add them to my network under static IPs and connect them to my main desktop for monitoring in the V7 software. Setting up my first "folding farm" was pretty cool that I could figure it out. My problem is this: I am not sure how to configure them in order to contribute the best I can. They have been folding the past two days and take about 1-2 days to complete a WU. One has gotten a WU that it cannot finish before the timeout time. It spent most of the day to only get to about 10% completion and still the ETA was 6.4 days.
Can someone show me the proper V7 flags to input for this machine to get WUs it can complete before the timeout deadline? I don't want to waste all my electricity on a WU that wont even be relevant by the time it finishes. I did have the max-packet-size flag with the value of 'small' but I checked the log after it downloaded a new unit and the unit was much bigger than the 5MB maximum. Also there is a client type flag and I know there is an 'advanced' value but is there another value that might help with older single core processors?

The stats for both machines are very similar but the one I'm more focused on right now has this:
CPU: AMD Athlon 64 Processor 3400+
Memory: 1.94 GB
OS: Microsoft Windows XP Service Pack 3
I also have the latest V7.4.4 F@H software installed on all my machines. I have been folding off and on based on the time of year since about 2011 so I am comfortable with the software just need some helps on the older machines.

The old AMD 64 CPU+ chips are only single core and they can't complete WU's before the deadline.  You could try the Chrome client but your numbers would still look like 2004. 

Keep in mind you have to complete 9 of 10 WUs to keep getting the quick return bonus.
You get the QRB with the folding key you got from Stanford.
The faster you return a WU the more points you receive with the bonus.
If you can not complete 9 of 10 you will have to complete 100% for a while to get the bonus back.
Also it hurts the science when you can not complete or delete a WU.
It has expire and be resent to someone else to finish.
You can get an OEM Win7 pro key for 10$ and use it for win10 install.
MS is still letting people install win10 with a win7 key for free.
Good luck  with what ever you do.
 

Cool GTX
I thought Win XP was no longer supported / usable for Folding ?
 
GPU folding is the way to go  PPD/watts

Works on both of these old XP desktops so far still. Any recommendation on a cheap GPU to drop in there to use instead of the old CPUs?

I think either GPU with a version of Linux as the OS or run the nacl client if it will work on xp.  The cpu's just don't have enough grunt these days to run a cpu WU

Smithwessen
Works on both of these old XP desktops so far still. Any recommendation on a cheap GPU to drop in there to use instead of the old CPUs?

Before you buy a GPU you had better make sure it's a PCIe motherboard. Odds are you have an AGP graphics slot in which case there is nothing you can buy to fold on anymore. GTX 400 series are the oldest NVIDIA cards still supported for folding and those are PCIe only. Even a GTX 480 folds poorly (I would know) and a Ryzen CPU can out fold it for half the power draw.  Even if your motherboard was PCIe, I do not think the PSUs could supply that much power. 
 
The electricity costs to running that old a system are never going to be remotely worth it. While I strongly understand (and share) your desire to keep using old rigs until they wear out, this is one of those cases there the systems are too old for any practical use.