Cryorig C7 G low profile cooler leverages graphene tech

by Mark Tyson on 27 September 2019, 12:31

Tags: CRYORIG

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Cryorig has expanded its range of C7 coolers with yet another model, joining the original C7 (100W), the C7 Cu (115W), and the C7 RGB (100W), we now find the C7 G where 'G' stands for graphene. Cryorig says this latest design is fully copper but with a coating of "high-tech graphene" and creates an "extraordinary thermal effect".

The Cryorig C7 G is basically a 97mm fan block with a height of 47mm. This makes to one of the most compact coolers around today. Inside it contains 4x 6mm heat pipes, and these are run through 57 graphene coated fins to the pure copper, nickel plated, base. A 92mm fan actively cools the stack, running between 600 and 2500rpm, producing up to 30dBa noise, and 40.5CFM air flow. Overall this air cooler weighs in at 674g. Cryorig says this cooler is capable of dissipating 125W.

Cryorig's C7 G low profile cooler fits all modern AMD and Intel consumer platforms. It adheres to the Keep Out Zone restrictions drawn up by AMD and Nvidia and is guaranteed not to impede RAM or PCIe card installation.

Though announced several weeks ago, the C7 G is only just finding its way into retail. Anandtech reports that it will be available in Japan from tomorrow at a price equivalent to US$92.50. It reckons the price may be justified by the heat dissipation qualities and the simple fact that graphene coating is an expensive business. Launch in other regions is imminent and we'd really like to see if the 'wonder material' coating does have a practical impact here.

 

HEXUS Forums :: 5 Comments

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Posted by philehidiot - Fri 27 Sep 2019 12:44
Is this just a way of getting rid of all that graphene that wasn't up to scratch due to impurities?
Posted by Tabbykatze - Fri 27 Sep 2019 15:15
How much can the C7 normal dissipate?
Posted by Corky34 - Fri 27 Sep 2019 17:08
100W going on what their product page claims.
Posted by philehidiot - Fri 27 Sep 2019 22:39
I'm feeling like I'm being a dick about all these new techs at the moment but honestly, I think graphene got a lot of press and funding but it's one of those things with limited, but profound potential. I suspect a lot of companies are going to be using “cheap” graphene for reasons confined mostly to marketing. I saw graphene headphones but without any explanation as to how they were better than normal ones. With this, I see it's graphene coated. Without getting into the ifs and hows I'd personally say as ever, let other people soak up the early adopter cost and risk. It's coated, great. So there's another point of failure and admission that it's an expensive and therefore likely complex process.

That being said, this is the bloke who generally buys old, established and reliable in anything like this. My motorbike uses bits from the 80s and is dirt cheap. I could have bought any bike in that showroom but I bought the one which used cheap components which have well established reliability and predictable modes of failure. I, being unequivocally me, would never benefit from a top of the range supersports engine with suspension designed for and by the gods of racing and wheels that weight less than the smaller of my testes.

I bought an expensive AIO cooler for my PC and, whilst I'm not regretting that decision, I would say it would be sensible to buy a decent air cooler and spend the cash elsewhere in future (next time I'll get a better CPU and put on a top end air cooler at half the cost).

I bought the top of the range mobile phone and, whilst I'm not regretting that decision, I would say that a mid range one will generally do everything I want and that the turnover rate of the software / hardware features / battery longevity means a decent mid range phone would give you 90%+ of the function for 50% of the cost.

I bought a top of the range fleshli…. never mind.

You get the idea. I'd say buy what you will actively enjoy. I think you do have to often experience the expensive stuff yourself to realise what you do and don't need. It's like teenagers pushing the boundaries to know where they are.

STOP : 0x00000040% (Sub “DRINKING”)
GOTO BED
WAKE: Hungover
Posted by Xlucine - Sat 28 Sep 2019 19:14
A potential coating process for graphene on Cu doesn't sound too onerous:
https://pubs.rsc.org/en/content/articlehtml/2018/ra/c7ra10167h
Add graphite to soapy water, stir like crazy to exfoliate it, centrifuge out the residual graphite lumps, then use some chemical to glue it to the Cu in a 1-2 um layer. From the results for a google search for “graphene coating on copper”, it sounds like this is doing the same job as a nickel coating

Tabbykatze
How much can the C7 normal dissipate?
Corky34
100W going on what their product page claims.

100 W for the Al model, 115 W for the Cu model (so even these small fins are noticeably efficiency limited), and 125 W for this one. I'm not sure why, the 2-3 orders of magnitude difference between the fin thickness and the likely graphene thickness (even with an order of magnitude difference in thermal conductivity) should mean that the Cu is doing all of the thermal conduction. Maybe the oxide that would form will impede convective transfer, or maybe it affects the transfer of heat to the air some other way?