whats the clock/hashrate of each chip
Specifications:
Technology: Global Foundries advanced 65nm technology (IBM core)
Die size: 7.5 x 7.5 mm
Substrate package: 10 x 10 mm
Package type: Standard BGA 144
Design type: 100% Hand routed for performance density
Power consumption: 3.2 Watt per GH/s
Performance: 4 GH/s
Performance design: 16 engines @ 250mhz nominal (294mhz max)
Advantages of Butterfly Labs chips:
1/2 the power usage per GH as the closest competitor
1/10th the silicon area per GH as the closest competitor (very high performance density)
Proven design currently operating in the field and ready to go
Unlike some QFN packages which require underside heat sinks, you can use off the shelf heat sinks due to the FCBGA package. No need to design and manufacture heat sinks!
Terms of purchase:
Delivery: 100 days
Payment: 50% deposit on order and 50% upon delivery
Cancellation: All sales are final and deposits will not be returned if final payment is not made prior to delivery.
Minimum purchase: 100 chips
Considerations:
Chip grades: Chips come in four grades of performance. Chips are sold in mixed grade lots. A grade has 16 engines, B grade has 15 engines, C grade has 14 engines and D grade has no less than 12 engines. All chips run at a minimum of 250 mhz. Higher grade chips will run up to 294mhz. The percentage distribution in each lot is 60% Grade A, 20% Grade B, 15% Grade C and 5% Grade D.
