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en:ztex_boards:ztex_fpga_boards:litcoin_mining_on_fpga [2013/07/15 17:56] – [Approach 2: FPGA implementation using external RAM] 84.181.59.227 | en:ztex_boards:ztex_fpga_boards:litcoin_mining_on_fpga [2015/05/20 17:17] – alte Version wieder hergestellt (2013/10/13 02:12) stefan | ||
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* The PBKDF2-HMAC-SHA-256 function can be neglected here. The computations can be done parallelly to the other computations and a single 64 cycle per SHA256 transformation loop is sufficient for many scryptROMix loops | * The PBKDF2-HMAC-SHA-256 function can be neglected here. The computations can be done parallelly to the other computations and a single 64 cycle per SHA256 transformation loop is sufficient for many scryptROMix loops | ||
* Due to decencies of intermediate results each scryptROMix loop requires about 140,000 computation steps | * Due to decencies of intermediate results each scryptROMix loop requires about 140,000 computation steps | ||
- | * Each scryptROMix loop (or pipeline stage) requires one 128 KByte vector (which has to be stored in some kind of RAM) | + | * Each scryptROMix loop (or pipeline stage) requires one 128.125 KByte vector (which has to be stored in some kind of RAM) |
===== Approach 1: FPGA implementation using Block RAM ===== | ===== Approach 1: FPGA implementation using Block RAM ===== | ||
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- | On [[http:// | + | On [[http:// |
- | 61 kH/s. Due to latencies of DRAM **a hash rate of 50 Kh/ | + | 6.1 kH/s. Due to latencies of DRAM **a hash rate of 5.0 Kh/ |
**In order to prevent confusions and questions: ZTEX does not plan to develop Litecoin mining software.** | **In order to prevent confusions and questions: ZTEX does not plan to develop Litecoin mining software.** |