AMD RX 480 - which spec?

[AvPro]

I'm upgrading my mining cards and swapping out from nvidia to AMD. I'm familiar with NVIDIA branding of performance on the cards e.g Ti , Founders Editions etc

What variant of AMD RX 480 would you recommend?
Really much difference in 4GB or 8GB?
Running the 480 on x4 PCI going to cause a performance issue? it hasn't with my NVIDIA cards.

I'm looking at getting a few of these and I heard 27-30mhash for Eth is what to expect

https://www.scan.co.uk/products/8gb-sapphire-radeon-rx-480-nitroplus-14nm-polaris-pcie-30-8000mhz-gddr5-1208mhz-gpu-1306mhz-boost-23

Or

https://www.scan.co.uk/products/nda-4gb-sapphire-radeon-rx-480-nitroplus-14nm-polaris-pcie-30-7000mhz-gddr5-1208mhz-gpu-1306mhz-boos


Thanks

[xxcsu]

you can get the  27-30mh/s with custom modded bios , and fine tune
you can expect 24-24.5MH/s without custom modded bios with any rx 480 cards on stock setings

[philipma1957]

it custom mods are hard for you to do  smOS  will get you about 27mh

[Emoclaw]

Get an RX 580 instead: https://www.scan.co.uk/products/8gb-sapphire-radeon-rx-580-pulse-14nm-polaris-2304-streams-1366mhz-gpu-8000mhz-gddr5-2xdp-2xhdmi-dvi
Reason: Newer, higher default clocks and potential for more undervolting, cheaper than the 8GB RX 480 you posted and has much better resale value.

[AvPro]

Emoclaw,

Thoughts on 4GB or 8GB version of the 580?

[Bones972]

If I were building a new rig right now I would go with the RX 470/570.  I have 3 rigs right now..  All are stock cards with no bios adjustment.  (Scared to death to brick a card)

Rig 1
5x Powercolor 480 8gb Red Devils (ETH) 123 Mh/s    895 W at the wall

Rig 2
5x MSI RX 470 Armor (2x 8Gb 3x 4Gb) (ETH) 125 Mh/s 660 W at the wall

Rig 3
5x MSI RX 470 Armor 8Gb (ETH) 125 Mh/s 640 W at the wall

The X70 series just seem to use way less W and are running strong! 

Rig 1 uses 235 W more than the other two rigs... At 0.1 KW/h that is just under $17.00 US per month that I am losing out on because of the electric on that rig compared to the RX 470 rigs and I am getting less Mh/s.  I have been tempted to toss them on Ebay and buy more RX 470's for that rig.

[AvPro]

  Ah, just placed my order for the 580 .... got it at identical price to 480

From what ive seen on YouTube (Russian videos) the 580 Pulse was up at 29/30mh/s with no mention of a custom bios
To get most out of the card would probably need someone to share a custom bios - not sure about bricking it because it has dual bios I think

[Marvell1]

Ah, just placed my order for the 580 .... got it at identical price to 480

From what ive seen on YouTube (Russian videos) the 580 Pulse was up at 29/30mh/s with no mention of a custom bios
To get most out of the card would probably need someone to share a custom bios - not sure about bricking it because it has dual bios I think

I like the 480s over 470s for dual mining and resale 8GB