Hash rate drop

[Ultegra134]

I'm currently using the Nicehash 1.7.5.13 miner with Amd 17.1.1 Catalyst drivers, using 2x R7 260x OC 2GB cards, with overclocked memory and GPU clock.
The past day, I noticed a large drop in hashrate, using the Equihash algorithm which was always the most profitable for me.
I used to mine 0.5 mBTC per day, at 250-270 Sols/s, currently, I'm mining with 200-220 Sols/s and making 0.3 mBTC per day. BTC's price increased, but earnings decreased quite a lot, I am making less money than 2-3 days before, when the price was at $2500.
What might be at fault for this hashrate drop?

[scavern]

Nothing is "at fault". Difficulty has just increased.

[Ultegra134]

Nothing is "at fault". Difficulty has just increased.

Difficulty of the Equihash algorithm(Zcash)? Equihash is for ZCash if I am not mistaken, I checked if the difficulty has increased but hasn't, if that's what you mean.

[Undefined31415]

Where are you getting your hashrate readings from? The Nicehash web interface? The Nicehash GUI? Or the actual command-line window that NiceHash pops up (such as that of Optiminer)?

[Ultegra134]

Where are you getting your hashrate readings from? The Nicehash web interface? The Nicehash GUI? Or the actual command-line window that NiceHash pops up (such as that of Optiminer)?

I mostly take into account the Nicehash GUI, it has a low delay, the website takes some time to update, currently,  the website says 0.00037171 BTC/day, not at home at the moment to check the GUI.

[Undefined31415]

Where are you getting your hashrate readings from? The Nicehash web interface? The Nicehash GUI? Or the actual command-line window that NiceHash pops up (such as that of Optiminer)?

I mostly take into account the Nicehash GUI, it has a low delay, the website takes some time to update, currently,  the website says 0.00037171 BTC/day, not at home at the moment to check the GUI.

I would only trust the reading directly from the actual mining software, and not Nicehash's website or GUI. Those (especially the one from the website) will almost always vary from your actual hashrate.

[SumikoMei]

Where are you getting your hashrate readings from? The Nicehash web interface? The Nicehash GUI? Or the actual command-line window that NiceHash pops up (such as that of Optiminer)?

I mostly take into account the Nicehash GUI, it has a low delay, the website takes some time to update, currently,  the website says 0.00037171 BTC/day, not at home at the moment to check the GUI.

I would only trust the reading directly from the actual mining software, and not Nicehash's website or GUI. Those (especially the one from the website) will almost always vary from your actual hashrate.

I also experienced a significant drop in hashrate since a few days ago on Equihash, with my GTX 1080. It went from 475~480H/s to 410~415. TDP also went from 110% to 80%. The hash rates were taken directly from the console windows, and I would love to know what caused this serious drop.

[Jdope]

Where are you getting your hashrate readings from? The Nicehash web interface? The Nicehash GUI? Or the actual command-line window that NiceHash pops up (such as that of Optiminer)?

I mostly take into account the Nicehash GUI, it has a low delay, the website takes some time to update, currently,  the website says 0.00037171 BTC/day, not at home at the moment to check the GUI.

I would only trust the reading directly from the actual mining software, and not Nicehash's website or GUI. Those (especially the one from the website) will almost always vary from your actual hashrate.

I also experienced a significant drop in hashrate since a few days ago on Equihash, with my GTX 1080. It went from 475~480H/s to 410~415. TDP also went from 110% to 80%. The hash rates were taken directly from the console windows, and I would love to know what caused this serious drop.

That was probably due to that TDP drop, if you're mining Equihash, you're just better off using EWBF, its better hash rate wise and it won't take alot of fees. Plus you can mix and match you're overclocking to match your desires.

[Ultegra134]

Where are you getting your hashrate readings from? The Nicehash web interface? The Nicehash GUI? Or the actual command-line window that NiceHash pops up (such as that of Optiminer)?

I mostly take into account the Nicehash GUI, it has a low delay, the website takes some time to update, currently,  the website says 0.00037171 BTC/day, not at home at the moment to check the GUI.

I would only trust the reading directly from the actual mining software, and not Nicehash's website or GUI. Those (especially the one from the website) will almost always vary from your actual hashrate.

I also experienced a significant drop in hashrate since a few days ago on Equihash, with my GTX 1080. It went from 475~480H/s to 410~415. TDP also went from 110% to 80%. The hash rates were taken directly from the console windows, and I would love to know what caused this serious drop.

That was probably due to that TDP drop, if you're mining Equihash, you're just better off using EWBF, its better hash rate wise and it won't take alot of fees. Plus you can mix and match you're overclocking to match your desires.

Just tried using EWBF miner, it doesn't even start for some reason. At the same time, it works fine on my laptop where I also tested it
 (Windows 10, Nvidia GeForce GTX 950M)..

[Jdope]

Where are you getting your hashrate readings from? The Nicehash web interface? The Nicehash GUI? Or the actual command-line window that NiceHash pops up (such as that of Optiminer)?

I mostly take into account the Nicehash GUI, it has a low delay, the website takes some time to update, currently,  the website says 0.00037171 BTC/day, not at home at the moment to check the GUI.

I would only trust the reading directly from the actual mining software, and not Nicehash's website or GUI. Those (especially the one from the website) will almost always vary from your actual hashrate.

I also experienced a significant drop in hashrate since a few days ago on Equihash, with my GTX 1080. It went from 475~480H/s to 410~415. TDP also went from 110% to 80%. The hash rates were taken directly from the console windows, and I would love to know what caused this serious drop.

That was probably due to that TDP drop, if you're mining Equihash, you're just better off using EWBF, its better hash rate wise and it won't take alot of fees. Plus you can mix and match you're overclocking to match your desires.

Just tried using EWBF miner, it doesn't even start for some reason. At the same time, it works fine on my laptop where I also tested it
 (Windows 10, Nvidia GeForce GTX 950M)..

It works on my end, If you're over clocking your card try it at stock clocks for a while then gradually build up to your overclocking setting.