AMD's gone full bore and done severe hardware locks on voltages which harkens back to a time before MSI Afterburner
Wrong...
If you own cards like the XFX DD (non ref) and Sapphire vaporX, Gigabyte, you will notice they are all on non reference boards. AMD did not lock the cards down. Buy a reference AMD card with the logo imprinted on the PCB and you will find its voltage unlocked.
Other companies such as XFX (one of the biggest offenders I might add) are locking voltage due to the downgraded hardware they are stuffing on their own PCBs. Take a look at XFX's new 7970 model with the shorter PCB.
http://www.newegg.com/Product/Produc...82E16814150665
XFX 7970 2013 DD 9.3" x 4.4" x 1.5"
VS
HIS Reference 11.53" x 4.96" x 1.65"
It's no doubt they are locking down voltages on their cards when they have to cram circuitry into smaller areas and provide smaller, less efficient coolers. There is no doubt it may have less power phases too. XFX is cutting corners and it shows. If you check the user reviews, XFX customer support offers reference models as RMA replacements since their DD models are so bad.
Newegg customer review -
"Pros: It is a 7970.
Lifetime warranty.
Good build quality with a few poor decisions just to be different.
That's it for this model.
Cons: LOCKED VOLTAGE!
The Double D cooler is garbage. My Sapphire Dual-x runs 7-12c hotter then the Double D and it is touching the back of the Double D. As a reference my 6870s, reference cards, the top one ran about 75c and the bottom ran about 55c.
This card stays hot for a long time after load drops to 0% at least 2-3 mins before the fans are at idle speeds again. This is normal for this card apparently due to the design of the cooler.
The fans are un-godly loud at any speed, video cards are the only thing not water cooled. Yet.
Other Thoughts: I bought this card from another store because I was looking for the single DVI out model that has unlocked voltage but there are no more to be had I guess as I ended up with this one.
3570k @ 4.8ghz
16gb ddr3 g.skill 1600 @ 1800 9-9-9-24
Sapphire dual-x 7970
XFX Double D 7970
3 x Dell S2340M 1920x1080 IPS LED @ 5900x1080 eyefinity
Manufacturer Response:Hello Dky, we can RMA this unit and swap it out for a
single DVI-Unlocked-Reference PCB model if you prefer the older revision. Please contact me at
neweggsupport@xfxforce.com to get started. Thank you "