sorry, didin said cards type - rx 470 4g.  Isnt it a little to big power  consumption for only 4 cards and other suff ? i suppose 4*90=360+60 the rest+*1.1 PSU not efficiensy = 430 Watt.
It seems something wrong going on

That is more like 92 + 50 watts = 140w or around 170w or so, remember that many apps dont show the true used power. The 92w is just the core watts. The rx 580 uses a lot more than the rx 480 at same voltage, rx 480 around 68w - 75w at 900mv, rx 580 85w - 95w 900mv.

I proceed like this, I don't know if it's okay but I can have quite stable results.

Example with one Sapphire Rx570 Nitro 4 gb Hynix, vga bios coming with 2 different chip strap, Elpida and Hynix but my card is equipped only with Hynix H5GC4H24AJ.

I tested a lot of strap but memory limit without error is in range 2045 - 2050 mhz, acceptable mem error until 2070 mhz more than 2070 i can not go without thousand of error.

Overclock and undervolt from Phoenix Miner or with OverdriveNT with the same result.

Ref parameter is set to 30.

1100 - 2050  [900 - 900]  30.65    86w
1110 - 2050  [900 - 900]  30.7      86w
1120 - 2050  [900 - 900]  30.8      86w
1130 - 2050  [900 - 900]  30.95    86w
1140 - 2050  [900 - 900]  31.3      86w
1150 - 2050  [925 - 900]  31.55    90w
1160 - 2050  [925 - 900]  31.6      92w
1170 - 2050  [925 - 900]  31.65    92w
1180 - 2050  [925 - 900]  31.65    92w

Clock > 1160 with ref 30 dont give me more hs so i set to 1150 - 2050 [ 925 - 900 ] for ~ 90w and go stable for days without error.

I can go down with core to ~915mv but after some time go to 0 h/s and restart.

Some question:

• for cvddc i made test with increase of 10mv each step, but effective cvddc in hwinfo is always a few mv less, exist a precise way to increase or decrease the core voltage? 6 mv step or 8 mv step or other?
• plus or minus mv to memory affect memory error?

Now, the voltage.

i have 3 RX 570's nitro+ 8gb

1º 1150/2250 831-837mv core/ 1000mv mem 31.4mh/s
2º 1150/2190 831-837mv core/ 1000mv mem 30,8mh/s
3º 1150/2125 831-837mv core/ 1000mv mem 30,3mh/s

They were stable for months at this settings. I tested for two days all of my cards before going into the mining rig. i programmed the bios in all of them and i tweaked as much as possible the voltages except for memory. ETH is a pretty intensive algo with the memory, and i prefered to forget about having problems with undervolting. I suppose your undervolt saves you some money.

my 2x6 mining rig are off. and they will continue to be off for a large period of time. I will only turn them on if i can get 100$ profit per month or more after electricity bill, which i think will not happen this year.  At current prices , and the very expensive cost per kW i would be losing around 15 $ for month with bills of around 350€ or a bit more in summer due to fans having to work hard in my room to deal with heat, specially where i live.

So....yeah...mining is not worth for me.

I will get my 5700XT only around 20-21 july, but will try to investigate some things before that date.

Hi,

I tried to bring back my RX580 (Red devil 8gb Samsung) to the original bios in order to use claymore 14.7 with rxboost and the strap function. (I use windows 10)

My problem is that every time I try to set-up the core voltage in claymore (I use -mvdcc 850) , the system crash almost immediately. (blank screen).

If I don't use the -mvdcc command, it is working and I get 10% more mh/s but I use 25% more watt than before so it is not very good.

I have tried to change the core voltage in MS afterburner (Core voltage -100)  but it doesn't have any effect on my power consumption….(like if it was not working).  

Anyone can help me please?

Thank you!
 

Yes I'm checking this card, but I need a few days to see what hashrate it can achieve.