Re: Who ordered the AMD Radeon VII? Lets make a list of Miners / Hashrates / Coins
Hey, I'm interested in the GPU and have been planning to build a mining rig.
How many GPUs can be powered using EVGA 1600 watts PSU?
Also, I'm worried about the noise dB, as I've read on some forums it can get loud?
How many GPUs can be powered using EVGA 1600 watts PSU?
Also, I'm worried about the noise dB, as I've read on some forums it can get loud?
Depends on what GPU you are using, and what coin you intend to mine. As an example, a GTX 1060 can consume up to 120 W. A Radeon VII can consume up to 300 W. For Ethereum, if you tune it properly, you can usually cut 25%+ off the power usage, but you don't want to use that as a basis, you always want to leave an overhead so you can mine other coins as needed. Also, as a rule of thumb you don't want to use your PSU at more than 80% since it's not efficient that way. So a reasonable expectation is that a 1600W power supply will probably provide about 1200W power efficiently. That will be able to power 4x Radeon VII's (1200W/300W), or 10x GTX 1060's (1200W/120W).
If you have miners inside, noise can be a problem. If it's outside, it's usually not that noticeable.
Higher end PSUs tend to have a reasonably flat efficiency curve up to 95+% load. Here's a measurement of the P2 for example:
And a curve for the T2:
Sure, you lose a couple percent from the peak around 33% load, but it's certainly not worth handicapping your capacity as a result. I run my 1600 P2s close to full cap in certain situations w/ 8 vega 64s on them.
Also, as I mentioned elsewhere, VIIs can do well over 300w. The TDP rating is stock - not really something miners (or most gamers spending $700 on a GPU) care about. That being said, even 300w is most likely pretty inefficient for mining on almost any algorithm - 200-250w is probably the target area for decent efficiency on a VII. I run ethash at 215w for 82MH/s.
I would say you could easily plan 5 VIIs on a 1600w PSU - possibly even 6 if you're good about power management. Mining hashrates, as well as power use, are not fixed quantities. You can tune your performance of any algorithm however it suits you. Just because everyone else runs ETH @ 90MHs for 260w, doesn't mean it's the only, or even best, option.
Finally, in addition to noise considerations (and they are loud, though not quite as bad as blowers,) you should think about heat management as well. 1600w is basically a space heater - one you'll be running 24/7, I assume.