Radeon released RX 480. (Card is Released)

[Marvell1]

For the 1000W output power supply, it can output 1000 W, while it can draw 1000W/91% 1098W. So it still has some redundency.

I thought that efficiency is related with the difference between the load needs and the power that you need from the wall.

For example, if you have a load that needs 100W, and you have a PSU with an efficiency of 90%, then you get from the wall 110W.

The efficiency is highest at around 50% of the maximum output. It is lower when the output is too high. I run my output around 70-80% of the maximum output.

My electricity price is high. So I use the platinum power supply and also a big specication PSU, so that the efficiency is high.

The difficulty of the Ethereum is rising fast, in the next 3 months, unless you have the 470 or better GPU, you will not make much profit in the Ethereum mining.

yeah you will need current gen cards, 14-16 nm to be able to profit, although the nanos are quite efficent as well i have a bunch of those undervolted nicely

[QuintLeo]

My electricity price is high. So I use the platinum power supply and also a big specication PSU, so that the efficiency is high.

 Saving 1-2% over a gold PS isn't a big deal if your electric price is DOUBLE what most bigger miners are paying.

 I suspect my electric would cost less if I used an 80% efficiency power supply than yours would for the same rig using a TITANIUM (93%+) efficiency power supply.

[Amph]

My electricity price is high. So I use the platinum power supply and also a big specication PSU, so that the efficiency is high.

 Saving 1-2% over a gold PS isn't a big deal if your electric price is DOUBLE what most bigger miners are paying.

 I suspect my electric would cost less if I used an 80% efficiency power supply than yours would for the same rig using a TITANIUM (93%+) efficiency power supply.

1-2% can be quite high if you have a very big farm, but it will also cost you more to buy those psu, and the calculated roi time was very high if your electricity is very cheap

[Mastercon]

My electricity price is high. So I use the platinum power supply and also a big specication PSU, so that the efficiency is high.

 Saving 1-2% over a gold PS isn't a big deal if your electric price is DOUBLE what most bigger miners are paying.

 I suspect my electric would cost less if I used an 80% efficiency power supply than yours would for the same rig using a TITANIUM (93%+) efficiency power supply.

1-2% can be quite high if you have  avery big farm, but it will also cost you more to buy those psu, and the calculated roi time was very high if your electricity is not very cheap

That is right. My electricity price is $0.25, so I use the platinum power supply. But it is too expensive to use the Titanium power supply.

[QuintLeo]

That is right. My electricity price is $0.25, so I use the platinum power supply. But it is too expensive to use the Titanium power supply.

 Ghods, how do you make ANY profit with that crazy high of an electric rate?

 Even Ethereum has got to be getting marginal to LOSING MONEY at that electric rate.

[Kwiksave]

That is right. My electricity price is $0.25, so I use the platinum power supply. But it is too expensive to use the Titanium power supply.

 Ghods, how do you make ANY profit with that crazy high of an electric rate?

 Even Ethereum has got to be getting marginal to LOSING MONEY at that electric rate.

At that price, the ETH mining is marginal profit.

In the next few months, the difficulty will be higher, so he will make a loss soon.

[eretron]

I was curious how much 480 pulls power from the usb riser 12V Rail, so the card is undervolted to 800mA in wattman so it pulls 140W in total from PCI-e 6pin and Riser, but to my surprise power draw trough the molex is 5.6A = 62W so almost 50%, is it possible that AMD shifts a bit more power draw trough 6pin PCI-e or is it locked ratio by design?

I did this measurement because I had 2x 480s on 1 Sata power lane, an it was getting a bit hot, but now knowing that it was 125W going trough that 1 12V wire on molex, I am happy it didn't melt.

[giagge]

The best result for power consuption to mining ETH/ETC with rx480 is ? .

[Cacaparg]

I was curious how much 480 pulls power from the usb riser 12V Rail, so the card is undervolted to 800mA in wattman so it pulls 140W in total from PCI-e 6pin and Riser, but to my surprise power draw trough the molex is 5.6A = 62W so almost 50%, is it possible that AMD shifts a bit more power draw trough 6pin PCI-e or is it locked ratio by design?

I did this measurement because I had 2x 480s on 1 Sata power lane, an it was getting a bit hot, but now knowing that it was 125W going trough that 1 12V wire on molex, I am happy it didn't melt.

I saw the PCEI 6pin used in the bitcoin mining, and they withstand 150W without problem.
Although the spec is just 75W.

[giagge]

Its not a good idea , dont force pciex to up 75 watt , burn risk .

[eretron]

I was curious how much 480 pulls power from the usb riser 12V Rail, so the card is undervolted to 800mA in wattman so it pulls 140W in total from PCI-e 6pin and Riser, but to my surprise power draw trough the molex is 5.6A = 62W so almost 50%, is it possible that AMD shifts a bit more power draw trough 6pin PCI-e or is it locked ratio by design?

I did this measurement because I had 2x 480s on 1 Sata power lane, an it was getting a bit hot, but now knowing that it was 125W going trough that 1 12V wire on molex, I am happy it didn't melt.

I saw the PCEI 6pin used in the bitcoin mining, and they withstand 150W without problem.
Although the spec is just 75W.

Yes, I know, I am very comfortable with 150W over PCI-e with good cabling, I am worried about molex that is powering risers...

[QuintLeo]

I saw the PCEI 6pin used in the bitcoin mining, and they withstand 150W without problem.
Although the spec is just 75W.

 I forget the exact spec on the CONNECTOR used for a PCI-E 6-pin connection, but I would ESTIMATE it is probably rated for at least 288 Watts.

 The ONLY difference between a PCI-E 6-pin and PCI-E 8-pin connection is that 2 GROUND leads get added - which doesn't add significantly to the actual power carrying capasity of the connection since it's going to be limited in both cases by the 3 x +12V lines, and if anything the 8-pin connector is going to thermally derate the individual connection pins a hair MORE than in a 6-pin connection.

150 watts through one of those connectors should be very conservatively safe, the PCI-E 75 watt rating for them is conservative beyond belief.

[reb0rn21]

@QuintLeo

i would not bet on that, sure its 3x +12v but on 6pin one iz used as sense, also had so far 2x burned pci-e connectors, should I blame not so quality chines crap, sure...
But would I pull 200w from them? I defo would not
Also had one burned 8pin PSU on PCI-e which was not going over 90w

[Kwiksave]

I saw the PCEI 6pin used in the bitcoin mining, and they withstand 150W without problem.
Although the spec is just 75W.

 I forget the exact spec on the CONNECTOR used for a PCI-E 6-pin connection, but I would ESTIMATE it is probably rated for at least 288 Watts.

 The ONLY difference between a PCI-E 6-pin and PCI-E 8-pin connection is that 2 GROUND leads get added - which doesn't add significantly to the actual power carrying capasity of the connection since it's going to be limited in both cases by the 3 x +12V lines, and if anything the 8-pin connector is going to thermally derate the individual connection pins a hair MORE than in a 6-pin connection.

150 watts through one of those connectors should be very conservatively safe, the PCI-E 75 watt rating for them is conservative beyond belief.

The spec for the 6 pin is 75W and for the 8pin is 150W.
But I see many people use the 6pin for the 150W without any problems. Like you said, the difference is two extra ground pin.

[QuintLeo]

@QuintLeo

i would not bet on that, sure its 3x +12v but on 6pin one iz used as sense, also had so far 2x burned pci-e connectors, should I blame not so quality chines crap, sure...
But would I pull 200w from them? I defo would not
Also had one burned 8pin PSU on PCI-e which was not going over 90w

 There is no specific "sense" line used on a PCI-E connection, nor is such a line part of the PCI-E specification.
 Some PS use a seperate "sense" line TO the connector, but that's pretty rare in current designs, and even where used the "sense" line or lines is merged at the connector.

 There is NO BLOODY WAY you burned a connector that was only drawing 90 watts unless you had a VERY bad connection on it.
 Most likely you had a short-term short that drew a BUNCH more than 90 watts and caused the burnt connector.



 The actual PINS specified for the PCI-E connectors are rated at 13 amps EACH - but you have to derate them some when they're used in a multi-pin connector housing, they end up being good for somewhat over 8 amps each after that derating.


 The 288 watt figure comes from a discussion, and some spec lookup, in a Spondoolies SP20 thread, and is the ACTUAL RATING FOR THE CONNECTOR as used on a PCI-E 8-pin connection. A 6-pin connector housing should have the same or slightly LESS need to derate each pin as much as there's fewer load lines crammed in on top of each other.



 The 75 watt and 150 watt "ratings" are PCI-E design spec limitations, NOT connector specifications.

[Kwiksave]

 The 75 watt and 150 watt "ratings" are PCI-E design spec limitations, NOT connector specifications.

That is right. But the AMD will draw no more than 75W from the PICE 6pin.
That is the reason they burnt many PCIE slot on MB and MBs.

[Gotomoon]

 The 75 watt and 150 watt "ratings" are PCI-E design spec limitations, NOT connector specifications.

That is right. But the AMD will draw no more than 75W from the PICE 6pin.
That is the reason they burnt many PCIE slot on MB and MBs.

There is a change from the AMD side. For the reference cards, it will draw more from the PCIE 6pin, but will restrict the PCIE slots.

[QuintLeo]

 The 75 watt and 150 watt "ratings" are PCI-E design spec limitations, NOT connector specifications.

That is right. But the AMD will draw no more than 75W from the PICE 6pin.
That is the reason they burnt many PCIE slot on MB and MBs.

 Yup, they're building PCI-E spec cards, so they are SUPPOSED to limit to the PCI-E specs.

 ASIC miner aren't PCI-E spec cards, they don't HAVE to limit to those specs.

[mewhoyou]

I have an issue running my RX 480 via USB risers. It just wont boot .. when its on RX 470 it works fine... is it just me or is there a way to get it done?

[arielbit]

sapphire rx 480 nitro 4gb here is about 71$ cheaper than 8gb model of sapphire rx 480 nitro

any thoughts? will 4gb will take a hit in dagger algos like 3gb 280xs in the near future?