check this:
i had purchased 6x RX 470 4GB all with the new samsung chip, i want to flash the card with the modded BIOS but there doesn’t seem to be a rom. for the samsung chip - just for HYNIX and ELPIDA. anyone have the rom for the new Samsung chip?
Hi, I’m new into bitcoin mining (it’s also my first time to do that) and currently running zcash mining at Claymore V6 and Windows 10 64 bit. For now my setups are 2x Sapphire Nitro RX 480 4GB (vram Elpida) and 3x Sapphire Nitro RX 470 8GB (vram samsung).
My RX 480 got 158-161H/s, meanwhile RX 470 163-166H/s. Are those speeds good enough? because I heard that my friend could reach 170H/s on RX 470 8GB modified bios (unfortunately he’s always busy to be asked about bios-modding)
I only overclocked the cards directly through MSI Afterburner and still don’t know how to mod bios properly especially the memory timing. Maybe if anyone could guide me to tighten the memory timing (as far as I know it could be done by Polaris editor). Thanks!
there is a possibility cheaper to buy these cards …maybe someone working on optiminer ? how many sol?
Claymore V5 getting 70 Sol/s
If you just want to buy something cheap, get a R7 370. Good price/hashrate ratio.
But to be honest, when I made my decision regarding graphics card for mining, I liked the idea to spend some more money on the cards and have something that will last for some time.
I went for the RX470 4GB because they had the best Watt/Hash ratio. The 480 yield some more hashrate but for some extra power usage.
I havea rig of 6x R7 370, right now i am getting 500-510 H/s 
, 83-85 h/s per card
155 Sol/s per RX470. 
@AnorakSupra we are talking about the R7 370 not RX 470!
Now 97 Sol/s per R7 370 ( nitro 2gb ) with claymore v7
At 150 W the card will pay for itself about the same time ETH PoS makes it worthless…if ZEC price doesn’t drop anymore and if the difficulty doesn’t rise.
155 / 30 M x 576 blocks/day x 6.6 ZEC/block x $65 per ZEC = $1.27 per day
0.150 kW x $0.15 x 24 hr = $0.54
$200 per card / ($1.27-$0.54) = 271 days to pay for itself
Calculate with 105 Watts per card.
Thats what I get after dropping the vcore.
(including the PCB)
That’s good and will soon be the average, which may push up the global hash rate to keep my estimates accurate. I’m lamenting miners working for $0 by selling too much of their ZEC. I wonder why they have not returned to ETH by now. People think it’s going to go down as the ramp completes, which might be creating a self-fulfilling prophecy: sell now before we’re looking at $30 per ZEC. After the ramp ends and the dust settles, it might experience a serious correction if non-miners want a cryptocoin that offers secure privacy.
Even now, any 2 W per S/s machines (like mine) need to be turned off and sold. (I’m working on it)
Hello,
How hash i get from msi r9 390x and r9 390 gpu?
Thanks
30-35 sol/s - depends if you clock them or not using genoil’s ZEC miner 0.4
How much power are they pulling ? I’ve heard r9 390 are power hungry … want to build a rig with 5xr9 390 would 1500watt PSU be enaugh ?
ASUS 390 OC 8G. 35-48S/s
Win 7pro, Driver 16.9.2 Genoil 0.4.1
Clock 1050. Mem 1500.
yes they are but, this particular algorithm doesn’t pull much so much power, but let’s say you’re mining ethash which is way more power hungry than equihash then I suggest at least gold/platinum 1500w psu as you’ve said for 5x 390.
but since you intend to mine equihash you’re more than safe with 1500w psu
I’ve got myself 1700w enermax platimax psu for 300€ @ computeruniverse.net (Germany) cheapest great quality psu available, everything else 1500w+ is around 400€
These numbers are still not better than what you can do with old CPUs from ebay. CPU is still lower initial and electrical cost per Sol/s. For example, a used i7-3770 desktop gets you 23 Sol/s for $215 using 90 watts (if hard drive and fans are kept as is). So 9 of them on a shelf gets you over 200 Sol/s at 810 Watts and $2000 total cost, beating the above on all three counts. BTW i7-3770 doesn’t have AVX2. Advancements from claymore and the other 120 Sol/s per 150 Watts will put GPUs a little ahead of this 2012 CPU, but if developers were more interested in promoting Zcash, CPUs might be able to stay ahead, putting the coins in the hands of everyone instead of us speculators.
What CPU miner gives upwards of 20 sols/s? With the std zcash miner and tromp enabled, I get about 10.5 sol/sec, on an intel core I7 6950K, with 4 cores enables and quad memory, with 8GB/channel.