Please give me some advice , whats the best choice of GTX card now? (ROI)

[jorneyflair]

Recently i got some idle fund(about 1000$) , its summer break time and im going to setup my first rig , please , guys , give me some advice. Thanks!
(regardless fees)

[bathrobehero]

It's always best to do your own research with your own figures (card price, electricity, etc).

[Grout]

Exactly, GPU prices are different for each region, and so are energy prices. The best card for me is probably different than yours. And my ROI figures are meaningless for you.
You need to do your homework.

[Oscilson]

For the time being, it is better to buy used 7970 cards, undervolt and under clock to mine Quark. You can reduce the memory speed to very long, around 300MHz to save electricity. Quark mining does not require memory bandwidth. It is profitable for perelectricity price up to $0.2 per kWh. I do not know how long the profit will last as it depends on the price of single coin (Shark coin, SAK). If SAK price collapse, then there is no profitable mining for most people with high electricity price.

[jorneyflair]

For the time being, it is better to buy used 7970 cards, undervolt and under clock to mine Quark. You can reduce the memory speed to very long, around 300MHz to save electricity. Quark mining does not require memory bandwidth. It is profitable for perelectricity price up to $0.2 per kWh. I do not know how long the profit will last as it depends on the price of single coin (Shark coin, SAK). If SAK price collapse, then there is no profitable mining for most people with high electricity price.

you made your point though i dont like AMD cards.

[Oscilson]

GTX 970 is a good choice is you want to stick with nVidia.

[bathrobehero]

For the time being, it is better to buy used 7970 cards, undervolt and under clock to mine Quark. You can reduce the memory speed to very long, around 300MHz to save electricity. Quark mining does not require memory bandwidth. It is profitable for perelectricity price up to $0.2 per kWh. I do not know how long the profit will last as it depends on the price of single coin (Shark coin, SAK). If SAK price collapse, then there is no profitable mining for most people with high electricity price.

What hashrate and power consumption (preferably at the wall) do you get?

[Oscilson]

For the time being, it is better to buy used 7970 cards, undervolt and under clock to mine Quark. You can reduce the memory speed to very long, around 300MHz to save electricity. Quark mining does not require memory bandwidth. It is profitable for perelectricity price up to $0.2 per kWh. I do not know how long the profit will last as it depends on the price of single coin (Shark coin, SAK). If SAK price collapse, then there is no profitable mining for most people with high electricity price.

What hashrate and power consumption (preferably at the wall) do you get?

VCore = 0.94V, core/memory = 820/250MHz, Hash = 78 MH/s. System Power from wall = 810W.

This is alomost as efficient as the GTX970 when GTX is in the low hash range. See the GTX card discussion: https://bitcointalk.org/index.php?topic=1091755.0

[bathrobehero]

For the time being, it is better to buy used 7970 cards, undervolt and under clock to mine Quark. You can reduce the memory speed to very long, around 300MHz to save electricity. Quark mining does not require memory bandwidth. It is profitable for perelectricity price up to $0.2 per kWh. I do not know how long the profit will last as it depends on the price of single coin (Shark coin, SAK). If SAK price collapse, then there is no profitable mining for most people with high electricity price.

What hashrate and power consumption (preferably at the wall) do you get?

VCore = 0.94V, core/memory = 820/250MHz, Hash = 78 MH/s. System Power from wall = 810W.

This is alomost as efficient as the GTX970 when GTX is in the low hash range. See the GTX card discussion: https://bitcointalk.org/index.php?topic=1091755.0

That's pretty good actually, thanks.

[Oscilson]

For the time being, it is better to buy used 7970 cards, undervolt and under clock to mine Quark. You can reduce the memory speed to very long, around 300MHz to save electricity. Quark mining does not require memory bandwidth. It is profitable for perelectricity price up to $0.2 per kWh. I do not know how long the profit will last as it depends on the price of single coin (Shark coin, SAK). If SAK price collapse, then there is no profitable mining for most people with high electricity price.

What hashrate and power consumption (preferably at the wall) do you get?

VCore = 0.94V, core/memory = 820/250MHz, Hash = 78 MH/s. System Power from wall = 810W.

This is alomost as efficient as the GTX970 when GTX is in the low hash range. See the GTX card discussion: https://bitcointalk.org/index.php?topic=1091755.0

That's pretty good actually, thanks.

That is from combination of 8 GPU, using 4X7990 or 3x7990+2x7970, or 2X7990+4X7970.