Sapphire 7970 Dual-x graphics card review

Sapphire 7970 Dual-x graphics card review

Sapphire 7970 Dual-x graphics card review.

The AMD 7970 chipset, code named "Tahiti", has found one of it's best homes inside the Sapphire 7970 Dual-x graphics card.  Sapphire has done a great job with this card, as it relates to crypto-currency mining.  It sits on top of my favorites list.

This review is based on mining litecoins, in a single gpu mining rig.  Your results may vary.

System details

Motherboard: ASUS M5A99FX PRO

Processor: AMD FX 6100 6-Core Processor

Memory/RAM: Corsair Vengeance 8GB

Power Supply: Cooler Master Silent Pro M - 1000W 80 PLUS Bronze Power Supply

Graphics card: Sapphire AMD Radeon 7970 Dual-x Grahics Card

Operating system:  Xubuntu 12.04

AMD Drivers: 13.8 Beta

AMD SDK: 2.8.1.0

AMD ADL: 5.0

 

Overview

The Sapphire AMD Radeon 7970 Dual-x GPU is a fantastic performer.  The plastic fan shroud is significantly larger than most other standard 7970's.  It does provide good airflow; however, a significant amount of exhaust air dumps out from the top, and horizontally across the interior space of your case.  Placing two of these cards next to each other can cause one card to exhaust directly into the intake of the other card.  The size of the plastic shroud is larger than 2 pci slots.  It has a very large footprint.  The fan noise is relatively quiet, at high speeds.

The card comes comes factory unlocked.  Meaning you can adjust the voltage, with the appropriate software on Windows machines only.  Linux still has a problem adjusting the voltage of these cards.  The only way to adjust the voltage in Linux, is to flash the Sapphire with a bios that has a lower stock voltage.  I don't recommend doing this, as it has the potential of bricking your card.  Not to mention eroding any chance of warranty assistance.  

 b2ap3_thumbnail_SA7970_IMG_1120.jpg   b2ap3_thumbnail_SA7970_IMG_1123.jpg

 

b2ap3_thumbnail_SA7970_IMG_1116.jpg   b2ap3_thumbnail_SA7970_IMG_1115.jpg

 

Mining performance

The Sapphire 7970 performs wonderfully whilst mining litecoins or other scrypt currencies.  It mines bitcoins equally as well; however, using gpu's for bitcoin mining is somewhat antiquated, with the advent of ASIC miners.

This particular card is one of my favorites.  It has a very fast hash rate, a relatively low temperature, and is very stable.  I didn't have to mess the this card to much to get the performance that I needed from it.  

Final stable settings:

gpu-threads = 2

intensity = 13

engine = 1095

mem clock = 1500

powertune = 10%

worksize = 256

thread concurrency = 11,200

Net Result: = 740 kh/s 

b2ap3_thumbnail_SA7970_Selection_002.png   b2ap3_thumbnail_SA7970_Selection_001.png

 

Final stable settings:

gpu-threads = 2

intensity = 13

engine = 1095

mem clock = 1500

powertune = 10%

worksize = 256

thread concurrency = 11,200

Net Result = 740 Kh/s

Conclusion:

The Sapphire 7970 Dual-x is a top performer in the crypto mining world.  The stock voltage is relatively low, and it shows in the temperatures!  Make sure you have plenty of room in your PC case for this card, and don't expect to stack this card side-by-side with another one.  The size is just too large.  Be aware of how the air exhausts from this card, as it can blow hot air directly into your other cards.  Placement should be considered.  Overall, this card sits at the top of my GPU recommends list.  It's great for mining bitcoin, litecoins, and other cryptos!

Pros: 

Stable hash rate

voltage is unlocked (for windows machines)

Low temperatures

Cons:

Very large footprint

Exhaust flow can be less than ideal

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  • Guest - Stolyte

    Hello! I know that this particular card is one of my top picks. It has a quick hash rate, a generally low temperature, and is exceptionally steady. I didn't need to mess the this card to much to get the performance that I required from it.
    Thanks all!

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