On Thu, Mar 08, 2012 at 02:51:58PM -0500, m.roth at 5-cent.us wrote: > John R Pierce wrote: > > On 03/08/12 6:33 AM, m.roth at 5-cent.us wrote: > >>> > ok, so 3 x 48/64 core servers uses the same power as 6 x 4/8 core ? > >>> > thats still major win. > >> Um, no - that's what I'm saying is*not* the case. The new suckers drink > >> power - using a UPS that I could hang, say, 6 Dell 1950's off of,*if* > >> I'm lucky, I can put three of the new servers. And at that, if a big jobs > >> running (they very much vary in how much power they draw, depending on > >> usage), even with only three on, I've seen the leds run up to where > >> they're blinking, indicating it's near overload, over 90% capability. > > > > ok, how do you figure 3 48 core modern servers are not more powerful > > computationally than 6 8 core servers? the 1950's were "cloverton" > > which were dual core2duo chips, 2 sockets, at ~ 2-3GHz, for your 8 cores > > per 1U. > > I'm sorry, but to me, the above is a non sequitur. I was talking about how > much power the servers drink, and that the UPSs that I have can barely, > barely handle half as many or less, and I'm running out of UPSs, and out > of power outlets for them in such a small space (that is, a dozen or so in > each rack), without trying to go halfway across the room. If you need lots of smaller servers, supermicro makes a very nice single socket amd G34 board: http://www.supermicro.com/Aplus/motherboard/Opteron6000/SR56x0/H8SGL-F.cfm I have a bunch of those in production, and they work well. Most of mine only have 32GiB ram; I bought them back when 8GiB modules were expensive; but if I bought one today, they'd have 64GiB, as 8GiB reg. ecc ddr3 is cheap now. They use more than half what a dual G34 board with double the ram/cpu would use, but not a lot more than half. One of those single-socket G34 boards should use rather less power than a dual-socket 1950 with FBDIMMs and it should give you rather more compute power and ram. (ugh. as someone that uses a lot of ram and pays a lot for power, I hate FBDIMMs. I was almost entirely AMD socket F during that time period for the reg.ecc ddr2. all my new stuff is intel 56xx with reg. ecc ddr3.) Also, they make lower power G34 CPUs... they cost a bit more, but when you are paying California prices for power, it's usually worth it, especially if you plan on keeping the thing for 5 years rather than just 3.