It's taken a while, as I started on Collatz on 16th October 2011, when I got my first CPU tasks on this project...and I soon realised that even with a fairly good quad core CPU, that the only way to make a significant contribution, was to acquire a GPU and then I'd be able to crunch with the "big boys"....although at the time, I could only afford a very modest GTX560 and this was used on both SETI@home and to a lesser extent Collatz, PrimeGrid, MilkyWay and Moo!.
Times moved on and I was able to get a GTX580 and put that in a second host. Another GTX580 followed and that was when I really started motoring (and burning out PSUs) as I had both GTX580s in the same PC...and they got very, very warm.
After a while, the 5x0 Series were retired and I got 2x GTX970s which improved my stats. A new host was added, and this was the recipient of a 3rd 970 which was added courtesy of Mark (and who has also helped me to fend off Megacruncher from overtaking me in the UK stats).
And in the last few days, a 2080Ti has been added (courtesy of Richard) which has drastically improved my Collatz crunching !!
As of 15:36 today, I had earned on Collatz a Total credit of: 3,000,016,294
So, a nice big milestone to achieve before the year end, and a big thank you to Mark and Richard for providing mega-assistance to the "cause".
I'm off now to have a nice beer !
and a bit of a 
regards
Tim
