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https://opencores.org/ocsvn/darkriscv/darkriscv/trunk
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## AliExpress HPC 40GbE K420 (Kintex-7 HPC V2)
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The correct name for this board is "Kintex-7 HPC V2", but is more widely
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know as "Aliexpress HPC 40GbE K420" board, since there are lots of HPC
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boards in the Aliexpress site. In fact, this board is not manufactured
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anymore, instead there is an updated Kintex-7 HPC V3 available.
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The Kintex-7 HPC V2 board includes:
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- a XC7K420 FPGA w/ 910 pins
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- lots pf high-speed clocks: 100MHz, 125MHz, 133MHz and 156MHz
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- on-board USB/serial (CH340)
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- on-board SPI FLASH (N25Q256)
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- on-board 2xSFP+ (for up to 2x10Gbps)
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- on-board 2xQSFP (for up to 2x40Gbps)
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- on-board dual-channel 1033MHz DDR3
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- 16 LEDs (they appears to be reversed!)
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- 2 swiches
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- 4 SMA connectors
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- SATA interface
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- PCIe 8x
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- 3x different JTAG connectors (you need an external JTAG adapter!)
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- support for darkriscv running at 240MHz (single-thread)
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- multithread support up to 128 threads (120MHz)
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Unfortunately, there is no information yet about the HPC V3, but I guess the
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new board is more or less the same as the old board.
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