@mac1, FYI found an interesting spec.org comparison from Intel: http://ark.intel.com/compare/64590,53579
Foxconn (16c/32t) E5-2650 floating point: 428, integer: 524 - https://www.spec.org/cpu2006/results/res2013q2/cpu2006-20130404-25632.html
DL580 G7 (40c/80t) E7-4870 floating point: 741, integer: 1100 - https://www.spec.org/cpu2006/results/res2012q1/cpu2006-20111223-19278.html
Was thinking of buying a DL580 g7 for rendering as it'll support 3 x 300w gpu's so this just sweetens the deal!

Those HP's are absolute beasts, 39kg, 4x1200w PSUs (94%) but 80 threads of goodness which is basically saying 80 days of extra run-time every day. DL580 G7 When new cost just over $30K!
Looking at that Spec2006 page, I like the throughput figures as well, I was wondering if we had enough CPU models and daily points tallies if we could find a test in their list of 17 (FP) which most closely predicted performance - I know each project is different but here's hoping. My cursory analysis of 3 chips;

X5650 (Dual) Ubuntu 14.04 ~120K daily points
L5420 (Dual) Ubuntu 14.04 ~50K daily points
i7 3770 (Single) Windows 7 ~ 35K daily points - seems a bit sick this one.

I found the "444.namd" reasonable and some others in with a shout too. If that followed with your chips then you'd be looking at the HP doubling the Foxconn's output.

Back to your shopping - Passmark scores the 2650 a bit higher when comparing single chips (but their test seems to disadvantage multi-core systems) - it's hard to ignore the Watts though.
Passmark (Dual 4870)
Passmark (Single 2650)
It's a lot of power on tap in one box, if I had a rack with free electricity situated far from the flat it would definitely be on my shopping list! A couple of days to go on that one shown above - what do you think it will go for - £800-£1000 maybe?

cheers,

@Mac1.. a little early to tell but 2 Foxconns would at first glance, appear to be on par with the 64 core AMD. Here's the first full days figures compared with some of my other hardware:

Ubuntu, Foxconn, 2 x E5-2650 8/16 (32) core @ 2.00GHz
02/09/2017 | 0:034:02:05:58 | 119,180 | 368

Ubuntu, Supermicro 4 x AMD 6272 16 (64) core @ 2.1 GHz:
02/09/2017 | 0:067:00:03:29 | 258,447 | 767

Win 10, Asus Hero VI, i7-4770K CPU @ 3.50GHz
2/09/2017 | 0:006:23:52:07 | 30,783 | 96

Server 2012r2, HP DL360 g7, 2 x X5450 4 (8) core @ 3ghz (90% max usage)
02/09/2017 | 0:007:04:52:34 | 26,375 | 86

Ubuntu, HP DL385 g7, AMD Opteron 6276 16 core @ 2.3ghz (virtualised)
02/09/2017 | 0:011:00:24:48 | 41,647 | 126

Re: DL580, maybe 3-400 euro's, are you buying it?

I've been reading your posts reduk and mac1 with some jealousy. I have a thinly populated four bedroom house, and a nice unheated utility room in which to tuck a non-silent crunching rig... no, no, get thee behind me Satan!!!

Seriously though, my stats website is showing a dramatic increase in team crunching output since the end of last month, and particularly over the past week. Great job guys.

Good morning team.