Bitcoin 7990

is a type of digital currency that is based on cryptography. Cryptocurrency uses cryptography for security, making it difficult to counterfeit. Public and private keys are often used to transfer the currency from one person to another.

Cryptocurrency is considered a counter-culture movement related to cypherpunks, who advocate the use of cryptography as a route to social and political change. Cryptocurrency presents a form of this movement in that it is essentially a fiat currency, which means it only has value if people agree to such and use it as a medium of exchange. However, because it is not tied to any country, its value cannot be affected by a central bank. In the case of Bitcoin, the most prominent functioning example of cryptocurrency, its value is determined by supply and demand in the market. As such, this currency behaves much like gold and other precious metals.

Mining Monster Rig – 8 GPUs (4x Radeon HD 7990)

Windows 8.1 and 8GPU’s

Mining Pool and 5MH/s+

Performance (depending on the clock/voltage):

• Hash Rate: 4800-5600KH/s
• CPU Usage: 55% (average)
• RAM Usage: 1.9-2.2GB
• Power Input: 1740-1970W
• Power Output: 1500-1800W
• Temperature: 58-79°C

Specifications:

• Motherboard: ASUS M5A99X EVO R2.0
• CPU: AMD Sempron 145 (Single Core 2.8GHz)
• RAM: Corsair Vengeance 8GB DDR3 1600MHz
• GFX: 4x MSI Radeon HD 7990 (8 GPUs)
• PSU: Cooler Master Silent Pro M2 1500W
• SSD: Kingston 60GB SSDNow V300
• FAN: Sinbo 18inch Floor Fan (75W)

Software:

• Microsoft Windows 8.1 (64-bit)
• AMD Catalyst 13.12
• AMD APP SDK 2.9
• CGMiner 3.7.2

Settings:

• GPU Voltage: 1.050V (1.100V)
• GPU Clock: 950MHz (1000MHz)
• CGMiner 3.7.2: -l 13 -g 2 –thread-concurrency 8192