- Nov 4, 1999
- 24,120
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So I wondered at what point I'd be better off running my GPUs vs turning on my (gas) central heating for x hrs during the day when it's normally off (I'm furloughed atm, so at home during the day until the 30th).
My electricity charges are 15.72p/kWh and 21p/day standing charge.
Gas is 3.25p/kWh, standing charge is also 21p/day (I need to shop around to see if that's still any good).
I had my heating on for an hour (with it being about 9C outside) and it used 0.720 m3 of gas today, this site reckons that's 8.1811 kWh.
On my main rig, running 10T Rosetta and dual MW WUs on the GPU (@1266 MHz) it's drawing ~227w, with 12T Rosetta only it's ~116w, so ~111w running the GPU. Running the GPU 24hrs adds 2.664 kWh, quite a lot less energy than 1hrs heating! But even today just running my main rig's GPU wasn't quite enough to keep me warm, so I needed to find out what my 2nd rig draws too.
For 24hrs GPU crunching on my main rig that's an extra 41.9p/day over just CPU crunching, and 1hrs gas is 26.6p (+ standing charge for both).
So it would take just an extra 2hrs heating per day to exceed the cost of running 1 GPU all day on my main rig! (at 9C outside anyway).
My 2nd rig uses ~110w idling! lol. Running MW on its GPU (@850 MHz) it's drawing ~228w (and CPU is otherwise mostly idle. When loaded IIRC it adds about 100w).
So running my 2nd rig 24hrs/day, GPU crunching only, would add 5.472 kWh (24hrs x 228w) a day x15.72 = 86p/day, costing slightly more than 3hrs of heating (79.8p, with 9C outdoors temp).
Going by that, if I ran my 2nd rig just 6hrs/day (21.5p) it would be cheaper than running my heating an extra hour (26.6p). Sounds like a good excuse to GPU crunch! (assuming 2 GPUs can keep me warm enough in my lounge to prevent me from having to turn on the heating any extra).
Are my maths right?
Has anyone else worked out their heating cost vs GPU heating cost? (assuming your GPUs aren't producing more heat than you need! lol)
My electricity charges are 15.72p/kWh and 21p/day standing charge.
Gas is 3.25p/kWh, standing charge is also 21p/day (I need to shop around to see if that's still any good).
I had my heating on for an hour (with it being about 9C outside) and it used 0.720 m3 of gas today, this site reckons that's 8.1811 kWh.
On my main rig, running 10T Rosetta and dual MW WUs on the GPU (@1266 MHz) it's drawing ~227w, with 12T Rosetta only it's ~116w, so ~111w running the GPU. Running the GPU 24hrs adds 2.664 kWh, quite a lot less energy than 1hrs heating! But even today just running my main rig's GPU wasn't quite enough to keep me warm, so I needed to find out what my 2nd rig draws too.
For 24hrs GPU crunching on my main rig that's an extra 41.9p/day over just CPU crunching, and 1hrs gas is 26.6p (+ standing charge for both).
So it would take just an extra 2hrs heating per day to exceed the cost of running 1 GPU all day on my main rig! (at 9C outside anyway).
My 2nd rig uses ~110w idling! lol. Running MW on its GPU (@850 MHz) it's drawing ~228w (and CPU is otherwise mostly idle. When loaded IIRC it adds about 100w).
So running my 2nd rig 24hrs/day, GPU crunching only, would add 5.472 kWh (24hrs x 228w) a day x15.72 = 86p/day, costing slightly more than 3hrs of heating (79.8p, with 9C outdoors temp).
Going by that, if I ran my 2nd rig just 6hrs/day (21.5p) it would be cheaper than running my heating an extra hour (26.6p). Sounds like a good excuse to GPU crunch! (assuming 2 GPUs can keep me warm enough in my lounge to prevent me from having to turn on the heating any extra).
Are my maths right?
Has anyone else worked out their heating cost vs GPU heating cost? (assuming your GPUs aren't producing more heat than you need! lol)
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