At stock voltage (1200mV) my Ryzen 7/Vega 64 system was hitting 450W from the wall, however you should be able to PL+50% and lower the P7 voltage to about 1000mV (silicon lottery plays a big role here, I've seen people have good results down to 900mV or require up to 1100mV) for good clock speeds (undervolting tends to increase performance) and wall power consumption of under 300W.
I've seen people finding deals for MSRP finally w/ the cryptomining craze cooling down, but the Nano seems to be permanently out of stock and honestly, you can also get a Zotac GTX 1080 Mini for the same price ($500), which should have better thermals and slightly better performance than the V56 Nano and is widely available/in stock. I've been running Polaris, Vega, and Pascal cards (currently w/ a 1080 Ti on my primary workstation) and IMO there's not much difference between going Red vs Green this gen, just pick whatever is more available/better bang/buck.
Hmm, those numbers look good. My power supply supports 600W, but it looks like I'm going to have to pull out the old Excel spreadsheet again to figure out a nice easing curve for such a GPU.
I know based on my numbers that it seems...I'm not so lucky when it comes to this "silicon lottery" stuff, and it seems my undervolting numbers are rather conservative compared to other's benchmarks, as going any lower would cause problems running the more taxing games (Ryse: Son of Rome, Assassin's Creed: Origin, Crysis 3, etc.). One of the biggest ires I've had about the process was getting the best performance while maintaining reasonably good stability (i.e. won't crash with newer, more demanding titles).
Here's some of my R9 Nano numbers/settings (currently running something heavy in the background):
I was hoping the Vega Nano would mitigate the need for me to "babysit" the card, but all the reports about it also having similar heat issues does warant concern, as I am able to maintain temps on my R9 Nano only by removing the dust filters off of my Silverstone Raven RVZ02.
(My HDD sits in the GPU compartment, restricting me to mini GPUs. More on that later.)
I do use aggressive fan curves as I don't really mind the noise generated by my Nano; it's less loud than my former card (HD 7870) when hitting peaks.
I have the R9 Nano and the Vega 56 Nano. I think it's a worthwhile investment if you own a 1440p or 4k FreeSync monitor and want a SFF case that's actually small. My R9 Nano could not play PUBG at reliable frames on my LG 34UC98-W at 3440x1440. I had to play at 2560x1080 to keep the frames between 60-75 on the R9 Nano and when playing at 1440p I would get 30-50 FPS on medium-low settings. If you've played PUBG you know the game could go from no action to high action really fast. When I tried to play at 1440p with the R9 Nano in PUBG I'd get massive frame drops when enemies popped up and shot at me with automatic rifles (the absolute worst time). I can play the game easily at 1440p on the Vega Nano and the frames are around 80-90 FPS medium-high settings. Because PUBG is not optimized I still get frame drops at certain times so I use vsync as well at 60FPS for smooth game play. With the R9 Nano that's not even an option on 1440p.
Ok, let me stop rambling. Here's how I see it.
- You only or mainly play at 1080p.
- Keep the R9 Nano, don't upgrade.
- You don't care about FreeSync.
- Keep R9 Nano or upgrade to GTX 1070/1080 mini.
- You don't care about mini GPUs or SFF mITX cases at all.
- Why are you reading this then? Use any normal sized GPU that fits your fancy.
- You care about FreeSync, SFF mITX cases that are actually small, AND you want to play above 1080p resolutions on high settings with competitive framerates.
Final notes: If your case has decent cooling you should find that the R9 Nano and Vega Nano temps and noise are similar. Temps and noise are the same to me in my LZ7 case.
I own the new VEGA 56 NANO and a FURY X (For a slight comparison in terms of performance) Definitely worth it if you own a 1440P, 4K, 144hz refresh monitor. I can comfortably play games with higher IQ and refresh much easier then I could with the FURY X at the same resolutions. You may hit the thermal limit depending on the SFF chassis, overall cooling and resolution you're playing at.
As noted above, I have a Silverstone Raven RVZ02 B (dust filter edition), and had to take out the filters to improve airflow. I'm restrained to sticking to mini GPUs since my HDD is taking up part of the GPU chamber, and I have an optical drive, M.2 drive, and SSD loaded up in the chassy as well, meaning there's no room to do the "custom mod" to force the HDD on the CPU/motherboard chamber.
I have 3 x 1366x768 monitors and don't usually exceed 60fps. I was toying with the idea of upgrading to the Nano to give me better performance on games like Elite: Dangerous, where I use all 3 of my monitors via AMD Eyefinity. In fact, I kind of wanted to play more games in a multi monitor fashion, and I wasn't sure if my R9 Nano was cutting it (4098 x 768 @ 60fps).
At the moment I don't have a 4k monitor, but I do have a Samsung KU-6290, then again I don't think I would be able to take advantage of FreeSync withough plugging my rig directly to the TV.