My second ZEC + XMR+ ETH thread builds info links thoughts and photos.

[citronick]

I tend to agree with this statement. 

Yes!

However, I finally had a marginal success with it last night.  I set the memory voltage down to 0.870mV and bumped the frequency up to 2150MHz.  Dropping the voltage gave me some margin on power, and the increased memory throughput raised the hash rate from 24.5 MH/s up to 25.8 - 26.3 MH/s.  A little victory, I'll take it.

Just tried - my speed dropped from 22.4 to 19.6, so I reset to original values

i have given up on wattman and decided to go Heliox ROM mod instead.
As far as ETH mining is concerned high hash and low power, is the magic equation.

[LoneRangir]

It is the driver version that caused my regression in hash rate.  I reinstalled Crimson 16.7.2, and had to roll back driver version in the Device Manager.

I had to go back to 16.200.135.1001 (as reported in Device Manager) in order to get back to 26 Mh/s.

Edit:

Hmm... seems to be a mixed bag, though.  With this version of the WattMan software, the voltage and frequency settings for the core are 'N/A'.

[LoneRangir]

i have given up on wattman and decided to go Heliox ROM mod instead.

That is starting to sound better, and better... 

Does it work under Windows 7?

[philipma1957]

i have given up on wattman and decided to go Heliox ROM mod instead.

That is starting to sound better, and better... 

Does it work under Windows 7?

Links for this mod?

I have 20 cards a mix of 480 and 470.

I am doing 470mh or about 23.5 mh on average.

I am doing about 3300 watts which is okay.

[citronick]

i have given up on wattman and decided to go Heliox ROM mod instead.

That is starting to sound better, and better... 

Does it work under Windows 7?

Links for this mod?

I have 20 cards a mix of 480 and 470.

I am doing 470mh or about 23.5 mh on average.

I am doing about 3300 watts which is okay.

The mods can do up to 31MHs.

I am interested in the 29MHs with low power, will be flashing one of my 6 x 480 Rig soon.

Refer to https://bitcointalk.org/index.php?topic=1584617.msg15910357#msg15910357

[citronick]

i have given up on wattman and decided to go Heliox ROM mod instead.

That is starting to sound better, and better... 

Does it work under Windows 7?

yes, he managed to get the roms working for windows and also Linux.

I have used his Nano roms and its pretty good with low power.

he also has 370 and 390 rom mods.

and the latest 480, 470 rom mods is pretty good - imagine 480 doing 31.5MHs !

[ps_jb]

yes, he managed to get the roms working for windows and also Linux.

Please add the step-by-step manual how did you do it for Windows in the OP on MOD

Thank you!

[philipma1957]

i have given up on wattman and decided to go Heliox ROM mod instead.

That is starting to sound better, and better... 

Does it work under Windows 7?

yes, he managed to get the roms working for windows and also Linux.

I have used his Nano roms and its pretty good with low power.

he also has 370 and 390 rom mods.

and the latest 480, 470 rom mods is pretty good - imagine 480 doing 31.5MHs !

how much power?   30 mh = ?

 I have 11 480's and 9 470's

since I have smaller rigs  I don't want any more gear.

but my 20 cards do 470mh at the pool which is 23.5mh a card  I burn 3300 watts

so if I boost to 30mh a card I go to 600mh  vs 470mh   if watts scale  i go to



4212 watts

4212/600 = 7.02 watts a mh




3300 watts  all gear combined cpus,psu,hdd,mobos. etc

3300/470 = 7.02 watts a mh

[LoneRangir]

I'm trying to follow that thread on the mod. Lots of hoops.  I'll start one at a time, I guess...

[citronick]

I have successfully zapped my 6 x Sapphire RX480s rig with Heliox/Eliovp's "low power" rom mods and got 29MHs per card.

My rig now 174-175MHs, from 135-136MHs .... exactly what I am looking for - more hash, less power.

I am expecting a lower power consumption too - so i want to also measure the power draws.

Too bad, I couldn't get a kill-o-watt with me today, but will bring one tomorrow and report the power and amps.

I documented the whole flashing sequence, so that can share to all.

I don't know if it will work on everybody's build but as long as 480 reference, it should be ok.

Refer to https://bitcointalk.org/index.php?topic=1584617.msg16088056#msg16088056

[Redrose]

I have successfully zapped my 6 x Sapphire RX480s rig with Heliox/Eliovp's "low power" rom mods and got 29MHs per card.

My rig now 174-175MHs, from 135-136MHs .... exactly what I am looking for - more hash, less power.

I am expecting a lower power consumption too - so i want to also measure the power draws.

Too bad, I couldn't get a kill-o-watt with me today, but will bring one tomorrow and report the power and amps.

I documented the whole flashing sequence, so that can share to all.

I don't know if it will work on everybody's build but as long as 480 reference, it should be ok.

Refer to https://bitcointalk.org/index.php?topic=1584617.msg16088056#msg16088056

That's a killer ! Any idea how much I could squeeze from some RX 470, since they're cheaper and more available it seems ? I'd like to diversify my machine choice by after buying a 1070 buying a new AMD.

[squatz1]

So how do you deal with the rising difficulty of mining ETH with your rigs? Do you expect there to still be a good amount of profit mining with your GPU Rigs that you've set up for a couple more years?

[ps_jb]

So how do you deal with the rising difficulty of mining ETH with your rigs? Do you expect there to still be a good amount of profit mining with your GPU Rigs that you've set up for a couple more years?

Couple of years?

I dont think that you have to make plan longer than a couple of months

[LoneRangir]

https://bitcointalk.org/index.php?topic=1564664.0

ETH will get difficult because people are all jumping in, and the difficulty will grow rapidly as it moves to proof of stake.

We can get some extra life out of our rigs by switching to ETC.  

[squatz1]

So how do you deal with the rising difficulty of mining ETH with your rigs? Do you expect there to still be a good amount of profit mining with your GPU Rigs that you've set up for a couple more years?

Couple of years?

I dont think that you have to make plan longer than a couple of months

Well, do you think you could make a payback period of about 200 days and still make profit off of a rig that I would setup?

[LoneRangir]

So how do you deal with the rising difficulty of mining ETH with your rigs? Do you expect there to still be a good amount of profit mining with your GPU Rigs that you've set up for a couple more years?

Couple of years?

I dont think that you have to make plan longer than a couple of months

Well, do you think you could make a payback period of about 200 days and still make profit off of a rig that I would setup?

Depends what you consider ROI. I plan to get 50 to 70% of my GPU investment back when I sell them. That means after $100 or so per card, I'm in the black.

At least that's the game I'm playing in my head!

[arielbit]

sapphire rx 480 nitro 4gb here is about $70 cheaper than the 8gb model.

any thoughts if i should choose the 4gb over the 8gb model?

will the 4gb suffer the same fate as the 3gb 280x on dagger algo in the near future?

[LoneRangir]

sapphire rx 480 nitro 4gb here is about $70 cheaper than the 8gb model.

any thoughts if i should choose the 4gb over the 8gb model?

will the 4gb suffer the same fate as the 3gb 280x on dagger algo in the near future?

You'll be fine in the short to mid term.  The DAG increases roughly 0.73GB per year

Source:
http://ethereum.stackexchange.com/questions/426/what-is-the-current-dag-size-when-do-we-expect-to-hit-gpu-limits

[arielbit]

sapphire rx 480 nitro 4gb here is about $70 cheaper than the 8gb model.

any thoughts if i should choose the 4gb over the 8gb model?

will the 4gb suffer the same fate as the 3gb 280x on dagger algo in the near future?

You'll be fine in the short to mid term.  The DAG increases roughly 0.7GB per year

knowing that 3gb 280x are about 25mhs last year, these 4gb might decrease hashrate a bit more than 8gb models for a year of mining.

its 8gb then.

based on the link you provided its 2018 for the 3gb models,  but 280x already lost about 30% of its hashrate compared to about 15% loss on 8gb 390..

[ps_jb]

Well, do you think you could make a payback period of about 200 days and still make profit off of a rig that I would setup?

Of course I'm not thinking about making a profit from rig you are making

All my investment was in cards and PSU. I bought good r9 390 and will sell them for 75% of initial price

So definitely my ROI is not 200 days