I have 1000~1200 H/s with CPUs
I have 2400~2500 H/s with GPU.
I mine with cpus on minergate, and with GPU on differents pools.
I ran different tests, with several pools (see my msg on claymore threads - i tested for days now on XMR, QCN, BCN, and Ducknote and noted each time, after some time, how many i did with each)
I SHOULD earn two time more coins with gpus than with CPUs..
In reality, i earned 20% more coin with GPU, not 100% more. There is a huge difference.
Devfee in Claymore is 5%
Fee on minergate is 2.5%
I don't think there is a hidden fee with Claymore, but maybe the way the fee is collected make the mining much less efficient. Or it's a pool problem (node-cryptonote-pool)
Of course DDOS can affect thoses pool. I believe it for XMR, but for BCN or for ducknote ? I didn't see any downtime and get similar results.
Juste right now, i'm mining BCN with this config (1200H/s CPU ans 2400 H/s gpu)
After 24H : 184K for CPUs and 167K for GPU (but there is some not arrived yet, waiting for the 60 confirmation i guess)
If your stats are true, it means that the displayed Claymore hashrate is completely wrong (or a hidden fee IDK).
Pools report my hashrate correctly, when the stats works (but not constant.. fluctuating from 500 to 2500 H)
Problem is that the miner connect to mine for us and every x seconds connect for devfee (disconnect mining for user in between?) - maybe there is a waste of mining time in the process.
Claymore should test his miner without the devfee and compare it to the fee version, to see if the difference is more than 5% (but will it do that ? i don't think so..and i don't think he will let someone test a devfee free version of it (Claymore, if you read, i can do the test )
To see if it's a pool problem, i also will mine for x hours with half of the thread of a cpu on a node-cryptonote-pool and half withe minergate.
EDIT : and with a single 280x on the same pool.
I just launch it: 8 threads on minergate (~330H/s but with merge mining), 8 threads on monero.crypto-pool.fr (~350H/s, Wolf cpu miner) and a R9-280X on crypto-pool.fr too (~328H/s)
I will let them mine for 24h, and i will let some time (12 hours) to be sure all the payments are done by the pool, and i will post the results here.
In theory, i should have approx. the same amount, but we will see if the GPU make only half than cpu, or if it's the pool based on node-cryptonote-pool wich need optimizations.
I would try on Wolf pool, claiming it's the fastest pool with 0% orphan and faster confirmation, but when i tried, it can't connect...
HERE ARE THE RESULTS after 18 hours of mining.
I stop the mining 5 hours ago, to let the blocs on pool to be mature and payouts done. If in the next hours there is more payouts, i will correct.
CPU 1 (xeon 2687W) on minergate (330H/s, merge mining) : 0.533054140795 XMR
CPU 2 (xeon 2687W, Wolf cpuminer) on crypto-pool.fr (~340 to 360H/s) : 0.603162341904 XMR
GPU (R9 280X, Claymore 2.2) on Crypto-pool.fr (325H/s) : 0.438738015254 XMR
Conclusion :
Fisrt, Minergate miner is not as good as Wolf's one, but do merge mining
CPU2 is a little better than the GPU in hashrate (up to 10%), but the difference in earnings is almost 25% (including 5% of fee)
I don't know if there is some sort of hidden fees or simply a performance issue due to the way the devfee is taken.