I have a current mining set up for Ethereum for the last 7 months or so (6 rigs), and on the off chance that putting the CPUs to work could add another revenue stream, I've tested out Sumokoin's CPU miner.

I'm using an Intel Pentium G4620 https://www.newegg.com/Product/Product.aspx?Item=N82E16819117736, getting 57.56 average H/s.

So not that profitable, but between all 6 rigs it's about ~30-35 coins a month. So something at least. My question or issue is however, when the CPU miner is running it is also pulling on ALL my GPUs hashrate. I'm not getting the benefit of the hashrate, but it drops my GPUs current hashing performance (30 MH/s on average per GPU), down to about ~3-5 MH/s.

So why would a CPU miner in any way affect my GPUs? And where is that hashing power being pulled from the GPUs going? Or is this just a resource issue and some how the CPU miner scripting is also pulling all available system memory? Anyone else run into this?