Unfortunately those waterblocks will not even work for the 2GB version of the DCII gtx 670. So I doubt it will work for the 4gb card. the DCII cards have a different pcb layout. I bought the alphacool 670 waterblock and it did not fit. I didn't open the bag and performance-pcs.com were awesome and returned it. I'm still looking for one myself. I'm mainly posting this response so that if anyone finds one they may post a reply and I'll hear about it.

Hold the phone... http://www.ekwb.com/shop/ek-fc670-gtx-dcii-acetal-nickel.html Just found this on EKWB's website this looks promising. I'll let you know if it works.