Need help with a GPU water block

[Vampyrion]

I've been thinking about cooling my two video cards, but I'm not sure what water block to get. I have two Xfx Radeon HD 6870 Black Editions. There is just one problem that I am not sure if it affects anything here, but one card is a dual fan and the other one isn't.
One is the HD-687A-ZDBC:

The other one is the HD-687A-ZNBC:

I'm looking at three right now, but I'm not sure if they would work, or if they are even good.
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&products_id=34037
http://koolance.com/vid-ar687-r-video-card-vga-amd-radeon-hd-6870-water-block-refurb
http://koolance.com/index.php?route=product/product&product_id=966

Let me know what you guys think.
Thanks!

 

[B NEGATIVE]

Bottom card is ref,the top card is not.
It doesnt help that XFX change boards from Ref slightly...what looks like a ref card may have slight changes making it incompatible.

 

[Timeless]

I see you linked to some universal blocks. If you want to go that way there won't be a problem.

If you want 6870 blocks there could be a problem with the first card as the EK cooling configurator says there are different versions of that card and some will work others won't.

But are you sure you want to invest in those older cards? With that money you could buy a much better card now or in the near future. Unless you do buy the universal blocks cause you can reuse them later on.

 

[Vampyrion]

But are you sure you want to invest in those older cards? With that money you could buy a much better card now or in the near future. Unless you do buy the universal blocks cause you can reuse them later on.

I would love to get new cards, but I don't have the money to get new ones, unless I just go up to the 7870s. It took me a while just to get dual 6870s, which is why there are two different versions of the black edition in my case.

I most likely don't even need to water cool my GPUs, but I figured the case would look better have water blocks, rather than different looking GPUs.

 

[njallday]

As opposed to going for 2 7870s, why not just 1 7950 or 7970? It's pretty much useless to wc a 6870, they don't need it and they're old.

 

[Vampyrion]

As opposed to going for 2 7870s, why not just 1 7950 or 7970? It's pretty much useless to wc a 6870, they don't need it and they're old.

Them being old has no meaning, since they can play every game I throw at them on max settings, it's pretty pointless to upgrade just because they're old.
There is also no immediate reason for me to upgrade them, since I plan on doing a new build when I have the money. I mainly want to water cool them because it's something I can do.
Right now, I am just trying to experiment with this build so I have more experience to do some crazy stuff with my next one.