Stains inside GPU blocks?

Scotspaul

Scotspaul

Scotspaul

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22 Oct 2010
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So I finally got my third card installed yesterday, really pleased its finally finished - I just havent had time recently.

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Whilst I had the first two cards out to fit the third, I noticed there is some staining inside the block at what I presume is the area where the GPU sits?

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They have only been fitted for about a month, they can't need cleaning already can they? :eek:
 
Well I have to say i'm pretty ****ed off if it is plasticiser.

After the state my CPU got in I replaced all the original XSPC tubing with Primochill Advanced, and replaced the original Mayhems X1 black with fresh.
I obviously flushed the system with DI also.

:mad:
 
String said:
Why do you have so many connections on each card? It looks to me that your flow could completely bypass the top and middle cards via path of least resistance. Could your fluid be stagnating in those blocks, with very little flow?
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As stated by ubersonic, they are connected in parallel. Temps are within 2 deg C of each other at approx 50 C when gaming

When I had two in the loop, again in parallel, they were around the 40 mark, again within a couple C of each other.

Running parallel means i 'should' get the highest flow rate I can through the CPU block. (I think :p)
 
OK, a little more background info -

My Pump is a D5, it's in an XSPC Bay res. I had it set at 2.5 with 2 gpu's in the loop, its set at 5.0 currently now I have 3, but I was planning on throttling it back in a few days once it's had time to get rid of any bubbles in the loop.
Would about 3 be OK still or do I need to run it a bit quicker still now I have 3 blocks?

As far as the staining on the blocks, they were not in the loop when I had the original XSPC tubing. All i had at the time was the kit for a CPU, so pump/res, 280 rad and raystorm CPU block. When the temps started to creep up, I read up about it, then opened up the block to find loads of gunk. I then flushed the system before replacing the fluid and the tubing.
My concern is that the tubing was what was widely recommended as being free from the leeching plasticiser problem (It's Primochill advanced).

I guess i just sit tight and see what happens then?
 
Yeah the tubing has slightly lost it's original crystal clear look although it's nothing like the yellow colour of the old XSPC stuff I had went.
 
I'm gonna leave it for now and check what its like over the holidays then.

What a pain in the backside. You have no idea how snug everything is in that 750d - lol
 
momo56 said:
Had similar staining on my CPU block using primochill advanced as well.

Their support was useless they just blamed the retailer saying I was given the wrong tubing and to deal with them instead.
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Interesting. What tubing did you go with in the end?

What other options do I have if/when I do change it?
 
momo56 said:
Bought some of that EK ZMT tubing. Will let you know how it is if they ever decide to dispatch my items.

Shouldn't look too bad with a black/red build.
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I'd love to see some pics when you get it done :)

I've done a bit of digging into the tygon stuff and it looks like they all have plasticisers of some description. Looking at the ZMT tubing, it is a completely different material to the clear tubing, one that I assume doesn't need plasticisers to be workable (EPDM).

So, although I would rather keep transparent tubing for the nice UV effect, I much prefer to have a clean (as much as possible) maintenance free loop.

Does anyone else use the ZMT tubing from EK?
 
Thanks for the info Cenedd, you've swayed me back towards the Tygon again.

I feel like it's a bit of a minefield for tubing, if you don't want to get into a frequent cleaning / tube replacement schedule (which I don't)

On another note, whats best to remove the gunk from the block? I have access to proper solvents (at work) like IPA, Acetone, Butanone and some others that we use in cleaning processes.
 
Cenedd said:
Ketchup probably works due to its vinegar content.
It may seem a minefield but apart from avoiding the hideous mistakes, you'll be choosing between something that's good and something that's either as good in different ways or 99.9% as good - ie. you're gonna be fine with either.
The ZMT may well be fine but it might be a case if trying different fittings to see what gives enough grip. If you're after a slow build with plenty of spare time and budget, that's fine and you'll probably have some useful feedback for others afterwards...plus some colourful new vocabulary and maybe a little less sanity. But if you are short on time/money/patience you might want to steer clear of the norprene based stuff unless someone can state exactly what works well with it from experience.
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I've already spent a small fortune on fittings & the rest.
I'm gonna be fitting tygon I think
 
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