After other some days of test for me JCE is faster than any other miner on old cards like 370 with 2 gb.
Can get stable on v8 515 hs at 1150 gpu 1500 core. Also on lite, fast, v7 algo is ok.

But surprising for me is on my rx 470 gpu, first step sapphire reference can get with 0.35b stable 840 hs on heavy with 1250 gpu / 1950 mem.
Some time is stable at more than 900 hs but after drop at ~840.

If jce solved the problem with hashrate stability was great.

470 RIG



370 RIG