Reference based GTX 970's

[Kaltyos]

Hey guys.
I'm wondering which oem 970's use reference PCB's?
I know a large number of the EVGA models typically use reference boards with better components like upgraded vrm's but I was wondering what other options I would have when it comes to reference pcb's.
Only reason i'm looking for reference pcb's is due to waterblock compatability for my next upgrade.
Hope you guys can help me out here! :beerchug:

 

[Lazlo]

There is no GTX 970 reference modell. There were only a few enginering samples for presentation purposes.

 

[Asus11]

There is no GTX 970 reference modell. There were only a few enginering samples for presentation purposes.

I think he means reference PCB design

also there is reference style coolers made

OCuk have them

http://www.overclockers.co.uk/showproduct.php?prodid=GX-205-OK

also most basic cheap gtx 970s will be reference PCB design when the cooler is removed