http://www.guru3d.com/articles-pages/asus-geforce-gtx-970-strix-review,1.html
http://www.guru3d.com/articles-pages/gigabyte-geforce-gtx-970-g1-gaming-review,1.html
http://www.guru3d.com/articles-pages/msi-geforce-gtx-970-gaming-review,1.html
Asus (1114 Core) OC's to Boost Clock: ~1443MHz / Memory Clock: 8002 MHz with a noise level of 39 dbA under load, 69C GPU temp / 83.9C highest PCB temp
MSI (1325 Core) OC's to Boost Clock: ~1501MHz / Memory Clock: 8002 MHz with a noise level of 39 dbA under load, 68C GPU temp / 77.6C highest PCB temp
Gigabyte (1176 Core) OC's to Boost Clock: ~
1516MHz / Memory Clock: 8002 MHz with a noise level of 39 dbA under load, 60C GPU temp /
56.5C highest PCB temp
So while I'm normally an MSI 1st, Asus 2nd on GFX cards of late.... the 970 looks to be Gigabyte's win .... at least with the ones Guru3D got. Those PCB temps are incredible.....my water cooled 780s have comparable VRM temps.
MSI is highest clock in the box at 1325
Giga hit highest OC
Giga has best temps
Everybody same noise level
EDIT: Rethinking this a bit..... while it is impressive the temps the Giga hit, I was thinking originally that their clocks at which these were measured were so far apart..... during the thermal measurements, the MSI is clocked 13% faster so it should be expected that it will be higher.