Thanks so much for this graph. I always thought the correlation between temps and power consumption was pretty low, but this confirms it for me. Looks like a little less than 1 watt per 3 degrees Celsius. Need good water cooling to bring about a significant (15+ watts) power savings at same clock speeds and voltage.
Face2Face beat me to it -- You are being too conservative because you aren't accounting for the differences in power usage between the GPU and CPU.
3 data points on the 295X2 AIO:
TPU got R9 295X2 to run at 61*C max overclocked. In FurMark their card only reached 68*C!
http://www.techpowerup.com/reviews/AMD/R9_295_X2/28.html
AT has it at 73C
Hardware Canucks has it at
63.3*C
That 2600K overclocked uses way less power than an R9 390X would use. That means 20-25W reduction in power usage from 94-95C AMD reference blower to mid-60s/low 70s is probably a done deal.
Don't forget that when you overclock the Titan X on reference blower, it becomes a loud card. A lot of gamers ripped apart R9 290X reference blower, but the Titan X OC is up there. Essentially a water-block is required to have a quiet overclocked Titan X. AMD is bringing that right out of the box? Sounds like a great idea to me.
By going WCE edition with a reference card, AMD accomplishes all of these:
1) Likely a miniITX PCB, or at least one significantly smaller than the Titan X
2) Reduction in noise levels, temperatures and power usage via AIO CLC
3) Reviewers will not be able to talk smack about how hot and loud the reference blower card is, blatantly ignoring ALL after-market options as was the case with HD7970/7970Ghz/R9 290X. By releasing one of the coolest and quietest reference designs right off the bat, AMD is doing R9 295X2 all over again.
It's going to be interesting to see if smaller PCB+warrantied AIO CLC is the future of flagship GPUs since it means AMD/NV can make 300-350W GPUs easily with an AIO CLC keeping them cool and quiet.
Most importantly, because the HBM1 and the GPU are likely cooled together, the entire card runs cooler and AIO CLC is extremely effective for high wattage overclocking.
Max overclocked and overvolted Hawaii XT easily uses 350W of power but under a 120 AIO CLC is runs
quietly at 80C. No reference blower in the world can cope with this. It's going to be very difficult to find an air cooled blower than can cool a 350W card like this. You basically need a 2.5-3 slot Sapphire Vapor-X or MSI Lightning style cooler to match this.
I cant help but wonder if AMD have approved these sort of "accidental" leaks..
May 8, 2015 - WCCFTech
"It's an official render that AMD showed us.". I guess no one believed them because it was WCCFtech.
vs.
AMD seems to be going full "next generation" on this one - AIO CLC, no DVI, miniITX PCB. No DVI means the monitor makers should finally start taking DisplayPort a lot more seriously! I hope NV follows the same path with Pascal and gives us the option of no DVI, and AIO CLC. Finally a bold new direction in 250W+ GPU design and the long overdue to move ditch the old style I/Os that don't support FreeSync/GSync. At the same time this gives AIBs a lot more room for differentiation - they can make different sized PCBs, go air cooling, add back DVI.
Since HBM1, interposer and the GPU are now 1 cohesive unit, AMD will have full control over the manufacturing of all 3 of these components. That means the 'core' aspects of the videocard will be consistent across all AIBs. Hopefully no more cheap designed cards (XFX ahem HD7000 series, Sapphire HD7870 transistor issues), or AIBs skimping on VRAM and substituting Hynix for Elpida. Now, there will be more consistency.