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are these blocks compatible with kingpin card ?

No, they're not compatible with the Kingpin according to the EK Facebook rep.

Woo hoo, got my 2.  But it said no stock on backplates, I still ordered two anyway.

Got my 2 as well, though now I'm somewhat concerned they can only start processing them on Monday, but they already put them up for order anyway.
Ah well, at least I'm sure they're on their way (ish) now.
 
I got a reply on my ticket as well, it's basically the same answer they posted above:

Dear customer,

Thank you for contacting EK Support

We are sorry, but due to unexpected circumstances, there is a delay with the release of this waterblock.
Waterblock will be available in our sales program on Monday.

If you need any further information, please do not hesitate to contact me.

Kind regards Peter Šajn

Even if it's only qualifies as a preorder I'm still satisfied.  They should have put them up for preorder anyway.  That way they could produce enough to satisfy the quantity for people who wanted them right away and still have some stock left over.
Actually it's kind of funny, as soon as we started talking about the Bitspower block, they finally got off their asses.

cerealkeller
Even if it's only qualifies as a preorder I'm still satisfied.  They should have put them up for preorder anyway.  That way they could produce enough to satisfy the quantity for people who wanted them right away and still have some stock left over.
Actually it's kind of funny, as soon as we started talking about the Bitspower block, they finally got off their asses.

Oh, I have no doubt Luc did his part in monitoring this thread and passing on our eagerness/impatience 
I'm happy this way as well, now I don't have to check up on it or worry about it anymore, they'll just drop onto my doorstep whenever they're available.
 
I couldn't help it though, I paid extra for the 1-day shipping.
Did I mention I'm eager to get this build started? ^^

I feel bad for the people who bought these cards when they first came out.  I got mine about 3 weeks ago and waiting this long for blocks was too long already.  Finally I can unlock the full potential of these cards.

I've had mine since a week or 2 after release, coming from 2 watercooled 780's.
Ran them on air for a week or 2 after that, but I just couldn't get used to air cooling anymore, not to mention the rest of my loop looked kinda awkward after I ghetto'd in the 2 aircooled classy's.
 
When it looked like it might be a while before the full-cover blocks came out for them, I went ahead and picked up a couple of universal GPU-only blocks, so that's how I've been running them since.
 
Now it's time to rebuild my system as a mATX rig though (coming from a 900D monster), so I've been eager to get the full-cover blocks and get going.

cerealkeller
Even if it's only qualifies as a preorder I'm still satisfied.  They should have put them up for preorder anyway.  That way they could produce enough to satisfy the quantity for people who wanted them right away and still have some stock left over.
Actually it's kind of funny, as soon as we started talking about the Bitspower block, they finally got off their asses.

 
The day we will be afraid by a BP block hasn't been invented yet...

Leyaena
 
Oh, I have no doubt Luc did his part in monitoring this thread and passing on our eagerness/impatience 

That's more like it.