[WTS] 2 - Gigabyte Radeon R9 280X 3GB - Free Shipping to US

[Number6]

Looking to sell 2 Radeon R9 280X's (Gigabyte GV-R928XOC-3GD). The cards will ship in their original retail boxes, which will then be packed inside a shipping box with to protect against damage during transit.

One card is a Rev. 1 the other a Rev. 2. I have had these since November and they both have been mining around 720 kHash each without issue, staying between 54-58C.

Both are currently undervolted to 1.094V , but I can flash the BIOS back to default before shipping if so desired. Edit: They have the dual BIOS feature so the original version is also available with a flip of the BIOS selector switch, a small white switch along the top edge of the card.

Looking to sell both as a lot if possible, but will consider shipping individually.

Looking to get $680 including insured shipping for both, converted to BTC at time of order (currently ~ 1.06 BTC). Prices are for shipping to US locations only.

I will sell individually for $350 each, again converted to BTC at time of order, including shipping. I will throw in a free 1x to 16x PCI-e riser cable with each card.

[Umka]

I will be interested in both of your cards if i can figure out how to flash vBIOS on my Gigabyte R9s to match yours.

[Number6]

I followed this guide and it worked perfectly. http://www.cryptobadger.com/2013/10/undervolting-in-linux-via-modified-bios/

Couple of notes: take note of your BIOS switch as stated in the article, this can be used as a backup in case something fails. This also brings up a good point on the two cards I am selling, I have one of the BIOS images flashed on each card, so they actually have the original BIOS available with the flip of a switch if needed.

The second is that the numbers in the table didn't necessarily match the article. I think on mine the bottom entry was 0 as in the article, but I think the second from the bottom was #8 or something. Anyway, I have flashed these and other R9 series Radeons using these instructions and always changed the VDDC of the bottom two table entries under the Powerplay/performance tab.

I haven't had any issues yet, but realize you are always taking a risk when modifying/flashing BIOS images. I also ONLY change those two VDDC entries, nothing else. You may need to play with the voltages as some cards can go real low while others need to stay closer the default values.

[Number6]

bump

[Number6]

~Bump~

[Number6]

Update: Will throw in a 1x to 16x PCI-E riser cable with each card.

[Number6]

Price lowered.