Bitcoin Forum

Hi everyone,

is there a card worth to be used for scrypt mining among the following (that I can get at the same price, 320€)?

SVGA Sapphire R9 270 2G GDDR5 PCI-E DVI-I / DVI-D / HDMI / DP DUAL-X WITH BOOST & OC VERSION 11220-00-20G
SVGA Sapphire R9 270X 2G GDDR5 PCI-E DVI-I / DVI-D / HDMI / DP DUAL-X WITH BOOST & OC VERSION 11217-01-20G
SVGA Sapphire VAPOR-X R9 270X 2GB GDDR5 PCI-E DVI-I / DVI-D / HDMI / DP WITH BOOST & OC VERSION (UEFI) 11217-00-20G
SVGA Sapphire R9 270X 4G GDDR5 PCI-E DVI-I / DVI-D / HDMI / DP DUAL-X WITH BOOST & OC VERSION 11217-04-20G
SVGA Sapphire TOXIC R9 270X 2GB GDDR5 PCI-E DVI-I / DVI-D / HDMI / DP WITH BOOST (UEFI) 11217-02-40G
SVGA Sapphire R9 280X 3GB GDDR5 PCI-E DVI-I / DVI-D / HDMI / DP DUAL-X OC VERSION (UEFI) 11221-00-20G


Thanks,
ilpirata79

For that price, only the 280x (last one) and you're taking risks. The 270x's and 7870 aren't worth more than 120-130€ for mining

This will be your best bet among the ones you have listed. It is basically the newer version of the 7970, you can expect somewhere around 700-750 kHash/sec with a power draw of about 300 watts.

If you can get the 280x card soon you should be ok. I just did a calculation on CoinWarz using 720kHash at 350 watts draw (included MB and CPU) with $0.12 Watt/hr power cost and it shows the following daily profits of various scrypt coins:

LTC - $6.12   ~50 day payback
WDC - $8.27  ~ 37 day payback
MEC - $8.31  ~ 36 day payback

Paybacks were based on $300 a card (common in the US), you will need to convert using what you can buy it for of course.

You will obviously need to do your own calculations on the profitability with your own figures, and account for falling prices, but there is still a pretty good opportunity.

I agree the other cards are not worth considering at this point.

def the 280x.. Reason... 720-750 kh/s over 400..

Imho only 280x is enough good for mining for this price from this list...

I went for the one you suggested thanks.

I had in fact ordered a 7950 at that price. They cancelled the order for not very clear "the producer not ship it anymore" reasons.

ilpirata79

SVGA Sapphire R9 280X 3GB GDDR5 PCI-E DVI-I / DVI-D / HDMI / DP DUAL-X OC VERSION (UEFI) 11221-00-20G

I also have the sapphire dual-x (11221-00-20G).

I get 732 kh/s.

At what intensity? I'm considering buying a couple :)

Core Clock: 1050 MHz
Memory Clock: 1500 MHz
Thread concurrency: 8192
GPU threads: 2
Worksize: 256
Intensity: 13

Best setting I have found so far. With Core Clock 1070 MHz, I get 751 kh/s but temps are a bit high.

Thanks for the info, I'll go shopping today :)

Just leave some for the rest of us... ;D

I get 700 kh/s with my 7950