MCW80 or Rasa GPU Block?

[lilmanmgf]

So I have been unable to find any clear cut answers on this. Between the two which has the least restriction? Which one cools better? I like how short the Rasa is, but does it cool as well as the MCW80?

[Church]

No-one has compared yet. If you are not in hurry, i suggest to wait for skinneelab to test miscellaneous universal gpu waterblocks (they had it in plans). Don't know how soon it will be though, they are usually rather occupied with big pile/queue of testable LC components.
I've heard rumours that MCW80 is more resistive then MCW60.
Imho they all will handle cooling of gpu core good enough. There is also EK Supreme HF VGA block.

[Vapor]

No-one has compared yet. If you are not in hurry, i suggest to wait for skinneelab to test miscellaneous universal gpu waterblocks (they had it in plans). Don't know how soon it will be though, they are usually rather occupied with big pile/queue of testable LC components.
I've heard rumours that MCW80 is more resistive then MCW60.
Imho they all will handle cooling of gpu core good enough. There is also EK Supreme HF VGA block.Not sure when the review will be done from skinnee, but I know about half the testing is done and still going strong.

As for MCW80 restriction, I can comment on that from my own experience with a Swiftech Apogee LP (they're the same block, just a different mounting system--and actually I bought an MCW80 and put an Apogee GTZ's mounting system on it, so this is fully applicable to the MCW80). It's insanely restrictive. It's the most restrictive block I've ever come across. From memory, Apogee XT was at ~1.25GPM, CPU-360 was at ~1.60GPM, and the MCW80 was at ~.77GPM.

It's the only block on the market that I've tested and would call prohibitively restrictive. I usually don't think restriction means much, but the MCW80 is so restrictive that it will noticeably (.5C or more) hurt your CPU temperatures if they're in serial. If it's the only thing in the loop, then no big deal, but if not--it will hurt the performance of the other blocks in the loop.

[Utnorris]

Yeah, I can say from experience that the MCW80 is very restrictive. If you want a GPU only block that is not restrictive I would suggest the Koolance GPU-220. Plus they are very flexible in mounting do too the swinging arms.

[Church]

On the other hand MCW60rev2 then might be good choice, as not as restrictive, should also cool adequately, and has rather big miscellaneous unisink inventory released for it if one wishes for such to accompany gpu block. Pitty in most LC shops it has been replaced with MCW80. I hope Swiftech releases MCW90 or MCW80rev2 high flow version soon, as i doubt anybody can suggest purchase of it hearing these restriction numbers :eek:. I noticed some time ago that MCW60 was most often suggested as to which universal gpu WB to get, so it probably outsold others, but with 80's restriction..:shrug:

[lilmanmgf]

I actually already have an MCW60 on my 5850, but I just bought a second 5850 to run in crossfire. I have been unable to find an MCW60 for sale anywhere.

[iddqd]

If you want a universal GPU block, why aren't you considering EK HF? It's one of the best CPU blocks, and the GPU version is more or less the same. Which means that for purely GPU it will destroy any other block... but then you're limited by 120°C volterra chips :D

[Waterlogged]

Get a Apogee U1 (Link (http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_498_493&products_id=4586)) and then the mounting hardware you need for the 5850, problem solved.:up:

[lilmanmgf]

I ended up going with the Koolance GPU-220. We will see how it turns out.

[PatRaceTin]

Dont forget to attach VRM Heatsink

[lilmanmgf]

I was going to use the stock vrm cooling plate. Couldn't find any conclusive answers on how well this cools though.

[lilmanmgf]

Well back to the drawing board. For those of you who don't know the Koolance GPU-220 is extremely low, which makes using ram sinks/back plates impossible. I think I'm going to bite the bullet and just buy a $50 MCW60.

[ScottALot]

Well the XSPC Rasa CPU block is not very restrictive at all and is a great performer... if the GPU block is in any way based off of the CPU block, then it should be a good investment.

Off Topic: If you don't mind me asking, where are you located? It says you posted at 1:04 AM 0_0

[Utnorris]

If you are cooling a 5850 why not go full cover with one of these:

http://www.sidewindercomputers.com/aqcoaqforhd5.html

http://www.sidewindercomputers.com/hegp58.html

About the same price as one of the blocks you are looking at and are full cover so you do not have to worry about ram sinks and such.

[Utnorris]

Just came across this:

http://www.crazypc.com/products/PX936605.html

just the sink:

http://www.crazypc.com/products/hd5850-hs-936605.html

Might be something to look at if you don't want FC.

[lilmanmgf]

I actually already have one 5850 with an MCW60 and that unisink. I'd rather stick with a universal block so I don't have to change blocks when upgrading vid cards. I picked up a second 5850 to run in crossfire but was unable to locate a second MCW60.

@scott
I'm in NY. Could not sleep last night.

[Utnorris]

Here is a used one:

http://www.overclock.net/cooling-products/936273-fs-trade-swiftech-water-cooling-setup.html

Looks like it is still available.

Edit, just found another:

http://hardforum.com/showthread.php?t=1574166&highlight=mcw60