The memory bandwidth is just 256 bit, R9 390 is 512 bit. It might not be good for Eth mining.
7970 have 384 bit and 2048 SP 380X have 256 bit and 2048 SP
But 380X sligtly faster than 7970 on ETH mining
RX 480 seems to be good for but I see one problem - most reviewers say that power delivery will be divided - 75 W through PCI-E slot and 75 W through 6 or 8 pin power plug.
So we definitely need to use powered risers with RX 480 or we burn our mobo's.
7970 is also loosing hashing speed with each EPOCH change, however it appears the 380's are unchanged.
RX series is limited by the memory bus. For mining ETH I expect it to perform the same as Nano, around 25mhs at 150w @ stock settings. The real gem in here should be the rx 470 which I expect to perform like r7 370 around 14-15MH/s but using 75 instead of 120-130W
Most cards (R7 370, R9 380, etc) are the same way and draw 40-70W through the PCI-e bus 12V supply. I use unpowered risers with R7 370s and the ribbon cables don't even get warm.
Most 7870/270/370 cards have dual 6-pin power plugs The same is for 7970/280/380 cards - dual power plug.
RX series is limited by the memory bus. For mining ETH I expect it to perform the same as Nano, around 25mhs at 150w @ stock settings. The real gem in here should be the rx 470 which I expect to perform like r7 370 around 14-15MH/s but using 75 instead of 120-130W
Just a little edit there.
A nano does 27-28 stock settings
Does 23.5Mh underclocked to 800 core @ around 75watt
Most cards (R7 370, R9 380, etc) are the same way and draw 40-70W through the PCI-e bus 12V supply. I use unpowered risers with R7 370s and the ribbon cables don't even get warm.
Most 7870/270/370 cards have dual 6-pin power plugs The same is for 7970/280/380 cards - dual power plug.
Reference RX 480 have only one 6-pin plug
370 has got one 6-pin = 75via plug +~40W via unpowered risers, all works fine.
RX series is limited by the memory bus. For mining ETH I expect it to perform the same as Nano, around 25mhs at 150w @ stock settings. The real gem in here should be the rx 470 which I expect to perform like r7 370 around 14-15MH/s but using 75 instead of 120-130W
Just a little edit there.
A nano does 27-28 stock settings
Does 23.5Mh underclocked to 800 core @ around 75watt
Ok, ok hah I expect rx 480 to perform in a similar way effectively killing off nano for mining or causing it to drop in price... that is unless people with ITX boards are nuts.
RX series is limited by the memory bus. For mining ETH I expect it to perform the same as Nano, around 25mhs at 150w @ stock settings. The real gem in here should be the rx 470 which I expect to perform like r7 370 around 14-15MH/s but using 75 instead of 120-130W
Just a little edit there.
A nano does 27-28 stock settings
Does 23.5Mh underclocked to 800 core @ around 75watt
Ok, ok hah I expect rx 480 to perform in a similar way effectively killing off nano for mining or causing it to drop in price... that is unless people with ITX boards are nuts.
Well, i'm a big nano fan, but in a way i truely hope you're right though..
As said before, i will be definitely getting me some
RX series is limited by the memory bus. For mining ETH I expect it to perform the same as Nano, around 25mhs at 150w @ stock settings. The real gem in here should be the rx 470 which I expect to perform like r7 370 around 14-15MH/s but using 75 instead of 120-130W
Just a little edit there.
A nano does 27-28 stock settings
Does 23.5Mh underclocked to 800 core @ around 75watt
Ok, ok hah I expect rx 480 to perform in a similar way effectively killing off nano for mining or causing it to drop in price... that is unless people with ITX boards are nuts.
Well, i'm a big nano fan, but in a way i truely hope you're right though..
As said before, i will be definitely getting me some
Same here hence why I ordered my 370's off of Amazon to have time till 20th of July to make my decisions. If rx series turns out good I will simply send them back the 370's and get rx.
Would love to see 14MH/s out of rx 470 as it's tdp is supposed to be 75w. No additional power required. 6x470 with a good 550W PSU yes please
RX series is limited by the memory bus. For mining ETH I expect it to perform the same as Nano, around 25mhs at 150w @ stock settings. The real gem in here should be the rx 470 which I expect to perform like r7 370 around 14-15MH/s but using 75 instead of 120-130W
Just a little edit there.
A nano does 27-28 stock settings
Does 23.5Mh underclocked to 800 core @ around 75watt
Ok, ok hah I expect rx 480 to perform in a similar way effectively killing off nano for mining or causing it to drop in price... that is unless people with ITX boards are nuts.
Well, i'm a big nano fan, but in a way i truely hope you're right though..
As said before, i will be definitely getting me some
Same here hence why I ordered my 370's off of Amazon to have time till 20th of July to make my decisions. If rx series turns out good I will simply send them back the 370's and get rx.
Would love to see 14MH/s out of rx 470 as it's tdp is supposed to be 75w. No additional power required. 6x470 with a good 550W PSU yes please
Haha definitely!
But remember (as you probably know), it will probably consume more than 75w .. (with a non modded rom that is.. )
RX series is limited by the memory bus. For mining ETH I expect it to perform the same as Nano, around 25mhs at 150w @ stock settings. The real gem in here should be the rx 470 which I expect to perform like r7 370 around 14-15MH/s but using 75 instead of 120-130W
Just a little edit there.
A nano does 27-28 stock settings
Does 23.5Mh underclocked to 800 core @ around 75watt
Ok, ok hah I expect rx 480 to perform in a similar way effectively killing off nano for mining or causing it to drop in price... that is unless people with ITX boards are nuts.
Well, i'm a big nano fan, but in a way i truely hope you're right though..
As said before, i will be definitely getting me some
Same here hence why I ordered my 370's off of Amazon to have time till 20th of July to make my decisions. If rx series turns out good I will simply send them back the 370's and get rx.
Would love to see 14MH/s out of rx 470 as it's tdp is supposed to be 75w. No additional power required. 6x470 with a good 550W PSU yes please
Haha definitely!
But remember (as you probably know), it will probably consume more than 75w .. (with a non modded rom that is.. )
BTW. do you think running gear like that would increase the chance of a breakdown since all the power needs to travel via motherboard lanes?
@greenuser make yourself useful here, what would be a safe amount of electricity on motherboard lanes? Let's assume we run 6x75W gpu's are the lanes all separate for each PCI or is there a junction somewhere that could potentially burn facing high amperes?
Why risk the mobo. You are amusing the mobo manufacture QCs all boards for full load current. You may get a good one, but you may get a bad one. Remember, these boards are not military spec, they are made by the lowest bidder and only 1 in 10 (if you are lucky) tested to full load.
The problem with low voltages is “volt drop” over a given length of circuit track/wire/connection. The lower the voltage and the longer the run, the greater the proportion of loss. This means that the joints on the edge connectors have to be shiny and spotlessly clean, The pins in the socket have to of good quality and in 100% A1 condition. And the PCB etching has to be accurate and well calculated. Remember, your going to its limits. A sudden rise in temp could drive you over the edge.
Then you have the issue with propagation delay, are all of the voltage tracks on the PCB the same length? what with all these confounding variables I would use powered risers, but use the type with TO-220 sized voltage regulators packages.
I would power each rises from the same source used for supplying the GPU that it is hosting. Which need not be the same source as the mob. Moreover: although, the risers want +12v, 0v, 0v and 5v from a SATA or MOLEX, I would use the 3.3v instead of the 5v so that the regulators of the risers don't have to work so hard.
In all, when calculating current carrying capacity for a given size of cable/wire, always consider its length.
12Vdc @ 75w = 6.25A So a 400mm long 18AWG is fine, but at 800mm long you would need to be at 16AWG... IF yo wanted less that 1% loss in volt drop.
Cheap PSUs use cable at 3% volt drop. They are on the edge from new. It don't take long for it to start heating up.
So to sum up, Use good risers, calculate the length of your cables as well as their current carrying capacity, and clean all connections with IPA. Never leave solder flux residue. And use 3.3v from your PSU for powered rises instead of 5v if you have the capacity. Keep cables as short as possible. Any unusual smells, shut down and feel for warmth.
Same here hence why I ordered my 370's off of Amazon to have time till 20th of July to make my decisions. If rx series turns out good I will simply send them back the 370's and get rx.
Would love to see 14MH/s out of rx 470 as it's tdp is supposed to be 75w. No additional power required. 6x470 with a good 550W PSU yes please
It's already known that 470 will be based on Polaris 10 chip with some SP's disabled - 2048 or so, and 4 GB VRAM
Nice one @greenuser as I suspected. It might not burn but there's a bigger chance it will crash due to voltage instabilities.
BTW some new info: rx 470 4gb $149 6pin 110W rx 460 2gb $99 no pin - under 75W probably bios locked around 60W for safety.
Honestly? This might be a flop (for mining). rx 470 does have more shaders and speed than 370 but only a 128bit bus and the same power draw. rx 460 looks like r370 but it's got 128bit bus meaning it will suffer for ETH performance and be closer to R7 360.... Meaning under 10mh/s
This starts to look like just another revision of same old shit by amd.
Rx 480 is power limited by 6pin connector to match the 150w power draw. We will see many aftermarket revisions with single 8pin or 2x6pin to make it just another revision of 7950. AMD is getting seriously long milage out of that idea.
Same here hence why I ordered my 370's off of Amazon to have time till 20th of July to make my decisions. If rx series turns out good I will simply send them back the 370's and get rx.
Would love to see 14MH/s out of rx 470 as it's tdp is supposed to be 75w. No additional power required. 6x470 with a good 550W PSU yes please
It's already known that 470 will be based on Polaris 10 chip with some SP's disabled - 2048 or so, and 4 GB VRAM
From what I gather it will have 1300 or 1500 shaders. All depends on the memory bus. With 256 bit we have a winner but with 128bit bus it will be a flop.
From what I gather it will have 1300 or 1500 shaders. All depends on the memory bus. With 256 bit we have a winner but with 128bit bus it will be a flop.
From what I gather it will have 1300 or 1500 shaders. All depends on the memory bus. With 256 bit we have a winner but with 128bit bus it will be a flop.
Sure 99% that 256 bit, because of Polaris 10
Well then with 1536sp 256bit 110w draw we should see 17mhs stock and 19 oc At 123-133w from the wall making it one of the best cards for mining. Would be nice and stable too because of the headroom for power Where rx480 is limited by the 6pin and could crash when temp increases.
Well then with 1536sp 256bit 110w draw we should see 17mhs stock and 19 oc At 123-133w from the wall making it one of the best cards for mining. Would be nice and stable too because of the headroom for power Where rx480 is limited by the 6pin and could crash when temp increases.
Think that 470 is 1792-2048 SP, 256 bit, GPU OC up to 1250-1300 Mhz, 22-24 MH on ETH 480RX - 28-30 MH on ETH
My Sapphires 380X run on stock clocks with 0.1 V downvolt and make 21.5 MH now
@Jukebox How about a wager of 1 eth? >24Mh I win, <23Mh you win, and 23-24Mh is a draw.</p>
OK, but some positions must be noted. 1. Card must use stock air cooling system. 2. Original, Genoil or Claymore miner only can be used. 3. No testnet, no benchmark - only ETH network. 4. Card must keep 24-hour mining under 75 C on GPU with less than 75 % RPM with +25...+30 C air temp. 5. No additional blowing/cooling can be used. Comments?
My MSI R7 370s run 75-80C with the stock BIOS running < 50% fan speed, so the temperature restrictions don't seem appropriate. How about just restricting it to stock BIOS, and to keep me from cherry-picking a card, using special cooling, etc, I'll agree to a max 10% OC over the stock BIOS clock speeds. I'm fine with Genoil or Claymore's miner, and of course I'm talking about mining on the current DAG. We'd also need a specific date when the bet gets decided. I'd suggest July 31st.
Polaris seems to be able to run +50% GPU clock on stock voltage and cooling. Any OC, less than 75 C GPU temp with no more than 75% RPM, stock BIOS, soft volt-mod is allowed - seems to be honest conditions.
It's only my own conditions to long-term mining.
Time - 30 days after official release seems to be OK.
BTW I think that we will see modded BIOSes, that unlock disabled SP's
@bitcanuck Thats some poor msi you got. Ive just bought the cheapest xfx 370s with a single fan And at 55% they sit at 64C Currently running at 1038gpu and 1596 memory.
It kind of doesnt make sens that those double fans provide less cooling...
1536sp I say 17.5mhs stock, 19 stable OC and 20 max with some crashes. 1536 wont go over 20.
OK. I haven't played with fan profiles before but that shouldn't be a problem. I accept those terms.
One final point. The winner must confirm receipt of payment on these forums within 24hrs of receiving payment. Failing this, the looser is allowed to publish the eth address the payment was sent to along with the transaction ID in order to prove his honesty.
@Dr_House86 Realistic would be probably achieved by multiplying TDP by 1.5 480 TDP 150, therefore, 225W max 470 TDP 110, therefore, 165W max
I am thinking that one EVGA 1300 can run seven 470, a nice 140-160mh rig.
This guy... where did you get this from?
110w for rx470 and 150w for 480. 150w is the physical limit of those cards due to a single 6pin
Power draw depends on the efficiency of your power supply. 90% gold will give you 123 for rx470 and 167 for rx 480
THAT guy... A single 6 pin PCIE connector CAN deliver much more than 75W (75W PCIE, 75W from the slot). They just cannot legally say that. In BTC land people routinely put up to 140-150W on a single PCI connector, so the max would be 140-150W from PCIe+75w (at least) from the 16X PCIe slot on the mobo or powered riser=215-225W max. It is possible.
Comments
For mining ETH I expect it to perform the same as Nano, around 25mhs at 150w @ stock settings.
The real gem in here should be the rx 470 which I expect to perform like r7 370 around 14-15MH/s but using 75 instead of 120-130W
[email protected]@384 bit slower than [email protected]@256 bit
Fury [email protected]@4096 bit slower than [email protected]@512 bit Most 7870/270/370 cards have dual 6-pin power plugs
The same is for 7970/280/380 cards - dual power plug.
Reference RX 480 have only one 6-pin plug
A nano does 27-28 stock settings
Does 23.5Mh underclocked to 800 core @ around 75watt
As said before, i will be definitely getting me some
Would love to see 14MH/s out of rx 470 as it's tdp is supposed to be 75w. No additional power required.
6x470 with a good 550W PSU yes please
But remember (as you probably know), it will probably consume more than 75w .. (with a non modded rom that is.. )
@greenuser make yourself useful here, what would be a safe amount of electricity on motherboard lanes?
Let's assume we run 6x75W gpu's are the lanes all separate for each PCI or is there a junction somewhere that could potentially burn facing high amperes?
You may get a good one, but you may get a bad one. Remember, these boards are not military spec, they are made by the lowest bidder and only 1 in 10 (if you are lucky) tested to full load.
The problem with low voltages is “volt drop” over a given length of circuit track/wire/connection. The lower the voltage and the longer the run, the greater the proportion of loss. This means that the joints on the edge connectors have to be shiny and spotlessly clean, The pins in the socket have to of good quality and in 100% A1 condition. And the PCB etching has to be accurate and well calculated. Remember, your going to its limits. A sudden rise in temp could drive you over the edge.
Then you have the issue with propagation delay, are all of the voltage tracks on the PCB the same length? what with all these confounding variables I would use powered risers, but use the type with TO-220 sized voltage regulators packages.
I would power each rises from the same source used for supplying the GPU that it is hosting. Which need not be the same source as the mob. Moreover: although, the risers want +12v, 0v, 0v and 5v from a SATA or MOLEX, I would use the 3.3v instead of the 5v so that the regulators of the risers don't have to work so hard.
In all, when calculating current carrying capacity for a given size of cable/wire, always consider its length.
12Vdc @ 75w = 6.25A So a 400mm long 18AWG is fine, but at 800mm long you would need to be at 16AWG... IF yo wanted less that 1% loss in volt drop.
Cheap PSUs use cable at 3% volt drop. They are on the edge from new. It don't take long for it to start heating up.
So to sum up, Use good risers, calculate the length of your cables as well as their current carrying capacity, and clean all connections with IPA. Never leave solder flux residue. And use 3.3v from your PSU for powered rises instead of 5v if you have the capacity. Keep cables as short as possible.
Any unusual smells, shut down and feel for warmth.
Useful too for calculating cable length/size
http://www.solar-wind.co.uk/cable-sizing-DC-cables.html
Good luck!
http://forum.ethereum.org/discussion/comment/42544/#Comment_42544
sounds like a quite interesting mining card for me.
BTW some new info:
rx 470 4gb $149 6pin 110W
rx 460 2gb $99 no pin - under 75W probably bios locked around 60W for safety.
Honestly? This might be a flop (for mining). rx 470 does have more shaders and speed than 370 but only a 128bit bus and the same power draw.
rx 460 looks like r370 but it's got 128bit bus meaning it will suffer for ETH performance and be closer to R7 360.... Meaning under 10mh/s
This starts to look like just another revision of same old shit by amd.
Rx 480 is power limited by 6pin connector to match the 150w power draw.
We will see many aftermarket revisions with single 8pin or 2x6pin to make it just another revision of 7950.
AMD is getting seriously long milage out of that idea.
At 123-133w from the wall making it one of the best cards for mining. Would be nice and stable too because of the headroom for power Where rx480 is limited by the 6pin and could crash when temp increases.
470 is 1792-2048 SP, 256 bit, GPU OC up to 1250-1300 Mhz, 22-24 MH on ETH
480RX - 28-30 MH on ETH
My Sapphires 380X run on stock clocks with 0.1 V downvolt and make 21.5 MH now
1. Card must use stock air cooling system.
2. Original, Genoil or Claymore miner only can be used.
3. No testnet, no benchmark - only ETH network.
4. Card must keep 24-hour mining under 75 C on GPU with less than 75 % RPM with +25...+30 C air temp.
5. No additional blowing/cooling can be used.
Comments?
Any OC, less than 75 C GPU temp with no more than 75% RPM, stock BIOS, soft volt-mod is allowed - seems to be honest conditions.
It's only my own conditions to long-term mining.
Time - 30 days after official release seems to be OK.
BTW I think that we will see modded BIOSes, that unlock disabled SP's
It kind of doesnt make sens that those double fans provide less cooling...
1536sp I say 17.5mhs stock, 19 stable OC and 20 max with some crashes. 1536 wont go over 20.
What's a realistic power consumption in your opinion?
I hope these cards do well.
Realistic would be probably achieved by multiplying TDP by 1.5
480 TDP 150, therefore, 225W max
470 TDP 110, therefore, 165W max
I am thinking that one EVGA 1300 can run seven 470, a nice 140-160mh rig.
I hope for 22-24 mh for 470.
110w for rx470 and 150w for 480. 150w is the physical limit of those cards due to a single 6pin
Power draw depends on the efficiency of your power supply. 90% gold will give you 123 for rx470 and 167 for rx 480
A single 6 pin PCIE connector CAN deliver much more than 75W (75W PCIE, 75W from the slot). They just cannot legally say that. In BTC land people routinely put up to 140-150W on a single PCI connector, so the max would be 140-150W from PCIe+75w (at least) from the 16X PCIe slot on the mobo or powered riser=215-225W max. It is possible.