[pbsd]

They already have. The upcoming AVX-512 extensions [1] introduce the VPMADD52LUQ and VPMADD52HUQ instructions, which add the high or low 52 bits of a 52x52-bit multiplication to a 64-bit integer. Presumably this is done via the preexisting double precision floating-point multipliers.

[1] https://software.intel.com/sites/default/files/managed/0d/53...

[jolan]

IIRC, upcoming to Xeon Skylake processors not mainstream ones.

[rch]

Of course one can get a new 2 socket Xeon server* for less than the price of a MPB, so the mainstream distinction has shifted considerably over the last decade.

* (E5-2620V3 6C 2.4Ghz, 24GB RAM, 800GB SSD)

[chx]

Where are you getting a dual E5 V3 server for about 2000 dollars or less?

[hga]

That does sound low, but isn't out of the question. From Newegg:

E5-2620V3 quantity 2: 428.49

SUPERMICRO MBD-X10DRL-I 319.99

Kingston KVR21R15S4/8 x 3 90.99 (although 3 sticks doesn't make any sense)

$1450 total.

Or 6 sticks of KVR21R15S8/4 direct from Kingston at $62 each is $372, for 1549, which still leaves some room for a SSD and chassis.

ADDED: cheapest Supermicro 1U for this would seem to be the SC514-505, which for SSDs would seem to be quite fine if you can find it, found one price that looks correct based on the next higher grade with fancy hot swap disk trays of $233. So for the 6x4GB memory config, $1782, leaving $218 for the SSD. And you'd have to buy a couple of fanless heat sinks.

Hmmm, Intel has an enterprise Intel DC S3510 at 599.99. So we're close if you buy in any quantity, then again 24 GB is unbalanced for a 2 socket server. But this looks in the ballpark, these systems are getting to rather nice prices.

[vardump]

> although 3 sticks doesn't make any sense

Yeah, indeed it doesn't make much sense when you have 4 memory channels. Memory performance is going to be very bad. Four sticks would be just fine.

> Or 6 sticks

Neither does 6. Go for 4 or 8 sticks. Not sure if it applies here, but on some motherboards having 2x more than <number of memory channels> sticks means there's a bit more latency.

[rch]

I configured the Colfax CX1205a-X6 to confirm -- the spec is suboptimal but compares favorably to the most expensive MPB (which I see as just over $3K).