I have approximately 150 pcs of Sapphire R9 280x. There are few grades of cards available.

Disclaimer/T&C
Chip type: Elpida/Hynix Mix (I can sort out the chip for you if you want, all cards have been labelled)
Models: Tri-X (Toxic), Vapor-X, Dual-X
Hash Rate: No perceivable differences in hash rate among these models. If you want to use them to mine XMR, Hynix runs faster
Shipping: Ships from Malaysia via Fedex Economy Express. Shipping bear by customer. Will ship to any place on planet earth.
Shipping Time: 48 hours after payment is cleared.
Packaging: Brown box + Color Box (10 pcs per carton). Or consolidated bulk packaging with bubble wrap to save on shipping. *beware of shipping damage*
Payment: ETH/BTC Preferred. If you wish to deal on ebay for buyer protection, it can be arranged as well.
Warranty: Available till March/April/May 2017. Ships direct to Sapphire HK yourself.
Reputation: You can verify via eBay account, or I can show you my farm and send you a small ETH/BTC to verify that's me.
Price: *Maybe* negotiable depending on quantity.

Grade 1 - USD130 / 0.18965 BTC (Approximately 100 pcs available to go immediately)
1. All cards running at 1000/1500, 1.0xV. 6 cards can be powered by one 1200W PSU
2. All cards fully functioning with no fan malfunction
3. Warranty available, you may send directly to Sapphire HK for warranty (Valid till March 2017)

Grade 2 - USD130 / 0.18965 BTC (Approximately 50 pcs available to go in 2 weeks time)
1. Bone stock new RMA/warranty return cards with non flashed bios. Fans and cards are virtually new.
2. 50% payment for booking, 50% payment before shipping. You need to wait approximately 2 weeks time after paying deposit.

PS: I also have some R9 390. But did not bother to list as there's less than 10 available. Do PM if interested.

Almost all my cards are undervolted. Most of them running at 1000/1500. Some cards give 18+ some cards give 17+. 6 cards draw 1300+W on the wall with 1200W Platinum PSU.

I'm running 280x. I get

ETH@18.x MH + SC@220 MH with DCRI 35.
ETH@17.x MH + SC@420 MH with DCRI 50.

That's major improvement for small ETH drop. There's no reject.

I've put two rigs to mine ETH + Solo SC. The problem I'm getting now is that there is no shares being submitted but I can see my SIA GUI block height increasing. I'm not sure if it's actually mining or not....

Not really a good idea to mine SIA only. Best you go with dcri 50. Gives you 10% less hash rate but double SC hashrate.

Now the bigger problem I have and the reason I wish to solo SIA is because NANOPOOL has not been paying anything that I've mined....

I'd like to run pool+eth, solo+sia. Do I need to run the SIA gui on every rig to solo mine SIA?

Can someone advise why my 280x only gets 300+ MH per card? It used to do 1.3k MH per card.

I use my own eth-proxy. with ethminer, the syntax to connect to my proxy is:

ethminer -G -F http://127.0.0.1:8080/rig1

How do I connect to my proxy and assign a worker name for ETH side of the miner?

I'm unable to get workers to show up on dashboard.

I'm using eth proxy.


on my ethminer


Worker is set to monitored. Payment address is my wallet address. I'm hashing perfectly fine, but there's no update on the dashboard. Please help