EDR QSFP28 copper cables technical selection questions
Technical evaluation questions with variant-specific scope and sources.
EDR QSFP28 copper cables technical selection questions
These questions are prepared from the cited technical documentation and clearly scoped owner inputs. They are not a measured frequency ranking. Keep the applicability line with each answer; do not transfer board, cooling, crypto, protocol, cable length or firmware facts between variants.
What protocol is established for these exact suffixes?
Applicable canonical content subjects: 980-9I62W-00E003, 980-9I62Q-00E001.
The exact MCP1600-E001E30 and MCP1600-E003E26 rows establish 100G InfiniBand EDR. Their current Ethernet column says NA; this package does not transfer Ethernet claims from other MCP1600 variants.
Public references
- Validated and Supported Cables and Switches | ConnectX-7 Firmware RN
- MCP1600-E0xxEyy 100Gb/s QSFP28 DAC Cable Product Specifications: Introduction
How do the two offered versions differ?
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E001E30 is 1 m with 30 AWG copper. E003E26 is 3 m with 26 AWG copper. Both use QSFP28 and four 25G-NRZ lanes.
Public references
- MCP1600-E0xxEyy Product Specifications: Ordering Information
- MCP1600-E0xxEyy 100Gb/s QSFP28 DAC Cable Product Specifications | MCP1600-E0xxEyy 100Gb/s QSFP28 DAC Cable Product Specifications
Does an EEPROM make this active copper?
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No. The signal path is passive; the end includes identification memory for the host. NVIDIA specifies 0.1 W maximum for the cable end.
Public references
- MCP1600-E0xxEyy 100Gb/s QSFP28 DAC Cable Product Specifications | MCP1600-E0xxEyy 100Gb/s QSFP28 DAC Cable Product Specifications
- Specifications | MCP1600-E0xxEyy 100Gb/s QSFP28 DAC Cable Product Specifications
May an unsuffixed or -C cable be substituted?
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Not automatically. Preserve the exact E-series length and gauge suffix, then compare the receiving port, protocol and release table for the proposed replacement.
Public references
- Validated and Supported Cables and Switches | ConnectX-7 Firmware RN
- MCP1600-E0xxEyy Product Specifications: Ordering Information
Where does forward error correction take place?
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The FAQ places FEC in the switch and network adapter. Match the supported endpoint configuration; a cable does not independently fix a FEC mismatch.
Public references
Why can a cable have two minimum bend radii?
Applicable canonical content subjects: 980-9I62W-00E003, 980-9I62Q-00E001.
The connector exit generally needs a larger bend radius than the cable body. Follow the exact assembly drawing and leave adequate space behind the rack door.