i want to buy some gpu for mining Zcash. . what is best ROI for mining this coin ? AMD rx 480 or 470?
I would say rx 480 4gb.. much more cheaper than the 8gb version (even cheaper than the 470 8gb, at least in my country).. almost similar performance in term mining zcash... in my case rx 480 consume less power than the 470..
here's the hashrate of my sapphire nitro rx 470 8gb & rx 480 4gb:
the gpu 0 = rx 470, gpu 1 = rx 480
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ZEC: Share accepted (329 ms)!
ZEC: 11/16/16-02:14:11 - SHARE FOUND - (GPU 1)
ZEC: Share accepted (312 ms)!
ZEC: 11/16/16-02:14:20 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 307.922 H/s, Total Shares: 1435, Rejected: 3, Time: 01:04
ZEC: GPU0 152.638 H/s, GPU1 155.285 H/s
ZEC: 11/16/16-02:14:27 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 307.292 H/s, Total Shares: 1435, Rejected: 3, Time: 01:04
ZEC: GPU0 152.107 H/s, GPU1 155.185 H/s
ZEC: 11/16/16-02:15:24 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 306.654 H/s, Total Shares: 1442, Rejected: 3, Time: 01:05
ZEC: GPU0 151.656 H/s, GPU1 154.998 H/s
ZEC: 11/16/16-02:15:50 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 308.496 H/s, Total Shares: 1449, Rejected: 3, Time: 01:05
ZEC: GPU0 152.233 H/s, GPU1 156.263 H/s
ZEC: 11/16/16-02:15:55 - SHARE FOUND - (GPU 0)
ZEC: 11/16/16-02:16:23 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 310.850 H/s, Total Shares: 1459, Rejected: 3, Time: 01:06
ZEC: GPU0 153.520 H/s, GPU1 157.330 H/s
ZEC: 11/16/16-02:16:45 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 312.392 H/s, Total Shares: 1461, Rejected: 3, Time: 01:06
ZEC: GPU0 154.383 H/s, GPU1 158.009 H/s
ZEC: 11/16/16-02:17:27 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 312.066 H/s, Total Shares: 1466, Rejected: 3, Time: 01:07
ZEC: GPU0 154.624 H/s, GPU1 157.409 H/s
ZEC: 11/16/16-02:17:44 - SHARE FOUND - (GPU 0)
ZEC: Share accepted (328 ms)!
ZEC: 11/16/16-02:17:52 - SHARE FOUND - (GPU 1)
ZEC: Share accepted (329 ms)!
ZEC: 11/16/16-02:18:15 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 310.241 H/s, Total Shares: 1477, Rejected: 3, Time: 01:08
ZEC: GPU0 154.255 H/s, GPU1 155.986 H/s
ZEC: 11/16/16-02:19:42 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 306.195 H/s, Total Shares: 1488, Rejected: 3, Time: 01:09
ZEC: GPU0 151.096 H/s, GPU1 155.099 H/s
GPU #0: Ellesmere, 8192 MB available, 32 compute units
GPU #1: Ellesmere, 4096 MB available, 36 compute units
ZEC - Total Speed: 306.965 H/s, Total Shares: 1497, Rejected: 3, Time: 01:10
ZEC: GPU0 151.138 H/s, GPU1 155.827 H/s
Pool switches: ZEC - 0
Current ZEC pool share target: 0x001e1e1e (diff: 2176H)
ZEC: 11/16/16-02:21:05 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 308.673 H/s, Total Shares: 1501, Rejected: 3, Time: 01:11
ZEC: GPU0 151.308 H/s, GPU1 157.366 H/s
ZEC: 11/16/16-02:23:05 - New job from equihash.usa.nicehash.com:3357
ZEC - Total Speed: 308.596 H/s, Total Shares: 1525, Rejected: 3, Time: 01:13
ZEC: GPU0 152.859 H/s, GPU1 155.737 H/s
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(I erased the "SHARE FOUND" list to make my post shorter)
with the same core and clocks a 480 will consume 10% more than a 470 no way it cosumes less
I don't know man.. I said "in my case".. I have 1 sapphire nitro rx 470 8gb & one rx 480 4gb.. to produce the similar hashrate (around 150s), the 470 use more power than the 480... maybe i haven't found the right setting for rx 470.. I tried many things.. from lowering GPU voltage in sapphire Trixxx, lowering mV in bios setting using polaris bios editor, adjusting core clock memclock in bios setting,.. but the result still the same..
It is theoretically possible at stock for 480 to use less than 470, depending on ASIC quality. Stock voltage on my 470s varies from 1050mv to 1156mv. Higher ASIC quality generally leads to less voltage on stock settings. I undervolt 50-100mv from stock. If you had a really crappy 470 ASIC and an uber pristine 480, it might be lower, but in general 480 seems to be about 20w more.