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19" rack mountable phase systems. - Page 2

post #11 of 23
9/26/12 at 6:13pm
have you thought about a watercooling loop, if you want colder chill it ( TEC or phase? )

would be a pain in the behind to move ( unless had a kind of T block with disconnects on them for each level lol )
so would be a main line going up each side ( one in one out ) then T's in the line with quick disconnects so dont have to shut it all down or pull the loop apart
to change one thing lol ..

that with either a phase unit, or a TEC chiller ( with controller, keep it above ambient temp so no condensation? ) could drop the temps a bit.
but would suck a fair bit of power also having a phase or tec running 24/7 enough to cool 30+ boards? against air coolers*
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post #12 of 23
9/27/12 at 3:00am
Thread Starter 
Quote:
Originally Posted by xxbassplayerxx View Post

I believe you might be confusing SS with cascade. Single stage at its absolute lowest temperature, assuming zero load on the chip, might get down to about -50°C while a strong two-stage cascade unit can do around -100°C. At single-stage temperatures, you're likely to stabilize 5.2GHz-5.5GHz as long as it's not getting any warmer than -30°C or so when under load.
If you check this link, you can browse through the CPU-Z rankings based on cooling:
http://hwbot.org/benchmark/cpu_frequency/rankings?hardwareTypeId=processor_2493#start=0#interval=20#coolingType=
Keep in mind that is CPU-Z. If you want some semblance of stability, WPrime 1024M would be a better source:
http://hwbot.org/benchmark/wprime_1024m/rankings?hardwareTypeId=processor_2493#start=0#interval=20#coolingType=
I'd be quite interested to see if something like this could do the job:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131840

Many thanks for the tips. I've got an existing implementation with about 30 x Sandy Bridge chips on air running at about 5.0/5.1Ghz 24/7, so I'm intrigued to see whether the performance gain of the phase units will give me considerable difference in my bottom line - I understand that clock for clock IB is about 5-10% faster to start with so that isn't to be sniffed at for us, however entering into this area it's going to be a substantial investment in hardware and we're heading toward a state of diminishing returns.

I've purchased an LDCooling phase change unit (SS) which is rated for 300W heatload @ -30C along with a bench and a couple of different mobos and chips - I'll let you know how I go with it, however as a complete phase change noob I'm sure I might have some questions anyway!

Thanks all in advance for your replies - very helpful thus far. smile.gif
Edited by LapsedPacifist - 9/27/12 at 3:10am
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post #13 of 23
9/27/12 at 3:08am
Thread Starter 
Also, this mobo you suggested:-

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131840

...looks very good indeed, however the issue I've got is that we need at a minimum 2 PCI-E slots for running some specialised cards. I've looked at the Asus Maxiumus V GENE and coming in a m-ATX form factor it's very much of interest, however as these machines are going to be in a data centre I want BIOS level access along with power cycling ability if (and probably when) they flake out and fall over. I've got a card at the moment that I can put onto the remaining slot on the mobo that addresses this, but it requires video input from a separate source also, and at that point all my PCI-E slots are populated so putting in discrete graphics is ruled out.

I was thinking about using the Virtu graphics on the 3770k chip to drive this, but I'm thinking if it's running at such ridiculously high clocks via the CPU it's invariably going to be best to turn off the integrated graphics - or am I wrong? I'm unfortunately a little unfamiliar with the processor architecture - is using the integrated graphics going to take clock cycles away from the traditional CPU processing side of things, or indeed limit the OC?
Edited by LapsedPacifist - 9/27/12 at 3:23am
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post #14 of 23
9/27/12 at 3:17am
Quote:
Originally Posted by alancsalt View Post

So what kind of insulation? LET? Dragon skin? I've got a half horse phase unit, and it is quiet enough, but didn't think 24/7 was practical... (maybe the electricity bill becomes the obstacle then?)

I run my setup 24/ and have been doing so for over 6 months now. No troubles so far with the insulation. I did kill one mobo but that was mainly my own fault and didn't have anything to do with condensation.

The only stuff I use for insulation is eraser, some paper towels and armaflex tape. no grease in the socket or anything. So far no problems.



Also I haven't checked the power consumption but as far as I know it shouldn't be too bad, few hundred watts or something? Sure it might be a problem if you're some energy saving nut but beyond that, you can get GPUs to pull more tongue.gif
Quote:
Originally Posted by LapsedPacifist View Post


I've purchased an LDCooling phase change unit (SS) which is rated for 300W heatload @ -30C along with a bench and a couple of different mobos and chips - I'll let you know how I go with it, however as a complete phase change noob I'm sure I might have some questions anyway!
Thanks all in advance for your replies - very helpful thus far. smile.gif

I've got the same unit, the thing keeps around -30C with a 3930K in prime95 at 1.52v and 5ghz+. Depending a bit on the ambients of course though.

Don't have IB so I don't have any numbers for that unfortunately but seeing how it handles my SB-E, it should have absolutely no problems with IB.
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post #15 of 23
9/27/12 at 3:26am
Thread Starter 
Quote:
Originally Posted by Alatar View Post

I've got the same unit, the thing keeps around -30C with a 3930K in prime95 at 1.52v and 5ghz+. Depending a bit on the ambients of course though.
Don't have IB so I don't have any numbers for that unfortunately but seeing how it handles my SB-E, it should have absolutely no problems with IB.

TDP of the IB chips is 77W at stock, so I'm thinking even at silly clocks it's not going to even hit 200w, right? The LDCooling phase is rated for 300W heatload @ -30, so I'm hoping it can maintain at least -30 ...
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post #16 of 23
9/27/12 at 4:33am
I'll try and get a power meter hooked up to mine and run wPrime for a very rough idea. Past a certain point, every CPU starts munching watts at a disproportional rate
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post #17 of 23
10/5/12 at 1:19pm
The problem with Ivy is that heat transfer sucks and when it comes to phase, they are so much more dependant on effective heat transfer that to some degree running Ivy on phase is not really worth it.

If Intel had soldere the lids on things would be different.
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post #18 of 23
10/6/12 at 8:27pm
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Quote:
Originally Posted by LapsedPacifist View Post

OK, so let's say I had the following requirement...
5.8Ghz+, 24/7, on Ivy Bridge, with as many cores condensed into a 19" rack mountable system as possible?
I'm looking at phase change and have ordered an LD XL suction system and bench to first test a few mobo/chip combinations before trying to look at the bigger picture. If I can get the above speeds (or ideally faster) 24/7 stable, I'll be looking to replicate some kind of phase change into a 19" rackable system for deployment everywhere - about 30 or so systems.
I've currently got about 30 Sandy Bridge air cooled machines that do ~5.1Ghz but am thinking of taking the next step in terms of phase change - at the moment each of these machines use 3RU of rack space, but it's expensive in the data centres I'm thinking of putting these machines into - from all accounts a phase change system is going to be about 5RU high, which is problematic.
But before I get ahead of myself I'm looking to know:-
1. Does anyone know of any 19" rackable boxes that have a phase change system preinstalled? Less than or equal to 3RU would be ideal, however anything as a box would be OK to start with.
2. Ideally I'm looking for as much core density per RU as possible out of these machines. Was thinking of 2 x Maxiumus V GENE under phase per box might be doable, but again not sure if anyone else has had similar experience. Ideas?
Thanks in advance. smile.gif

I think you're going in the wrong direction. You're gonna waste a lot of space with phase change equipment, and unless you're going MP, you won't come close to the core density of 43U rack filled with mac minis (1U half depth, 2 machines per U = 43*2*2 = 172 cpus, 43*2*2*8 = 1376 threads). to stuff phase change in each rig, you'll probably get something like 10 cpus total in there (80 threads).
performance per watt of the the i7 mac mini setup would blow the latter out of the water.

If you really want to do this, you should do a chiller with common water cooling. Koolance has some 3U water cooling systems (http://koolance.com/index.php?route=product/category&path=28_42), you'd need to go a step further.
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post #19 of 23
10/7/12 at 8:02pm
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Quote:
Originally Posted by u3b3rg33k View Post

snip
Sorry for the off topic but

biggrin.gifbiggrin.gif I have just found my next DIY project because paying $1200 is a no go thumbsdownsmileyanim.gif
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post #20 of 23
10/8/12 at 12:09am
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You snipped the whole post! - but I assume you mean the koolance 3U device. you could DIY with a spare atx powersupply, an a FWD vehicle radiator + radiator fan, a little giant pump and some creative adapting.

But it wouldn't be as pretty...
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