Asetek LCLC Takes Liquid Cooling Mainstream

bigwophh writes "Liquid cooling a PC has traditionally been considered an extreme solution, pursued by enthusiasts trying to squeeze every last bit of performance from their systems. In recent years, however, liquid cooling has moved toward the mainstream, as evidenced by the number of manufacturers producing entry-level, all-in-one kits. These kits are usually easy to install and operate, but at the expense of performance. Asetek's aptly named LCLC (Low Cost Liquid Cooling) may resemble other liquid cooling setups, but it offers a number of features that set it apart. For one, the LCLC is a totally sealed system that comes pre-assembled. Secondly, plastic tubing and a non-toxic, non-flammable liquid are used to overcome evaporation issues, eliminating the need to refill the system. And to further simplify the LCLC, its pump and water block are integrated into a single unit. Considering its relative simplicity, silence, and low cost, the Asetek LCLC performs quite well, besting traditional air coolers by a large margin in some tests."

Comments

Re:Liquid cooling for datacentres?

[ZeroExistenZ]

i would have thought liquid cooling would make sense for datacentres - instead of huge electricity bills for A/C you could just plumb each rack into the building's water system

There are a few things that come to mind:

• - A datacenter might have different clients renting a cage, owning their own servers you can't enforce the use of watercooling. AC will have to be present and running in any case.
• - Water + electricity is a risk. With tight SLA's, you don't want to fry your server with your extra investments in its redundant failover hardware altogether.
• - Available server hardware isn't typically watercooled. Who's going to convince the client hacking a watercooled system on your most critical hardware is a good decision? For defects, a support contract with the hardware vendor is typical. If you mod it, soak it, you're out of warranty and can't fall back on your external SLA.
• - electricity "bills" aren't an issue, you have so much amps you can run on each cage if you rent you keep under it or you'll have to rent another cage (notice an advantage for the datacenter here?) It's always part of the calculated cost, it's a non-issue really for datacenters or for you when you want to rent a part of the datacenter.

Re:Liquid cooling for datacentres?

[greyhueofdoubt]

Because air has some undeniable advantages over water:

-Free (both source and disposal)
-Non-conductive
-Non-corrosive
-Lightweight
-Will not undergo phase change under typical or emergency server conditions (think water>steam)
-Cooling air does not need to be kept separate from breathing air, unlike water, which must be kept completely separate from potable water

Imagine the worst-case scenario concerning a coolant failure WRT water vs air:
-Water: flood server room/short-circuit moboard or power backplane/cooling block must be replaced (labor)
-Air: Cause processor to scale down clock speed

I don't think water/oil cooling is ready for mainstream data farm applications quite yet. I also think that future processors will use technology that isn't nearly as hot and wasteful as what we use now, making water cooling a moot point.

-b

Re:Liquid cooling for datacentres?

[evanbd]

Also... while it's a technicality, air *is* conductive. It just has a very high impedance. It *will* conduct electricity, and I'm pretty near certain you've seen it happen: it's called lightening.

If you want to get all technical about it, you're basically wrong. The resistivity of air is exceedingly high. However, like all insulators, it has a breakdown strength, and at electric field strengths beyond that, the conduction mode changes. It's not simply a very high value resistor -- nonconducting air and conducting air are two very different states, which is the reason lightning happens. The air doesn't conduct, allowing the charge to build higher and higher, until the field is strong enough that breakdown begins.

For materials with resistivity as high as air in its normal state, it's not reasonable to call them conducting except under the most extreme conditions. Typical resistance values for air paths found in computers would be on the order of petaohms. While there is some sense in which a petaohm resistor conducts, the cases where that is relevant are so vanishingly rare that it is far more productive to the discussion to simply say it doesn't conduct.

This is one of those cases. Claiming that air is conductive is detrimental to the discussion at best.