[GUEST ACCESS MODE: Data is scrambled or limited to provide examples. Make requests using your API key to unlock full data. Check https://lunarcrush.ai/auth for authentication information.]  ARMR Investing [@BretRosenthal](/creator/twitter/BretRosenthal) on x 2725 followers Created: 2025-07-22 18:11:49 UTC Still wondering why $CPER #COPPER weekly chart looks like this? @Grok3 Copper Requirements for Colossus X The copper requirements for xAI's Colossus X with GB200 servers are substantial due to the scale of the supercomputer and the reliance on copper-based NVLink and Ethernet interconnects: NVLink Copper Usage:Each GB200 NVL72 rack uses over XXXXX copper cables, primarily coaxial cables for NVLink, with an estimated total length of over X miles (3.2 km) per For larger configurations like NVL36x2 (dual-rack), the copper cable count increases significantly, with XXX ACC cables and XXX DensiLink flyover cables per system, costing over $XXXXXX for DensiLink cables If Colossus X includes, for example, XXXXX GB200 NVL72 racks (a speculative estimate based on the planned XXXXXXX GPUs, with each rack housing XX GPUs), the total copper cable count could exceed X million cables, with a cumulative length of over XXXXX miles. This is a rough estimate, as the exact number of racks and configurations (NVL72 vs. NVL36x2) is not fully specified. Ethernet Copper Usage:The Spectrum-X Ethernet network uses copper DAC/ACC cables for short-haul connections, particularly within racks or between adjacent racks, to minimize latency and power Each GPU node in Colossus has eight 400GbE links (one per GPU) plus one for the CPU, contributing to additional copper usage for intra-rack networking  XXX engagements  **Related Topics** [colossus](/topic/colossus) [$cper](/topic/$cper) [investment](/topic/investment) [Post Link](https://x.com/BretRosenthal/status/1947721257937494213)
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ARMR Investing @BretRosenthal on x 2725 followers
Created: 2025-07-22 18:11:49 UTC
Still wondering why $CPER #COPPER weekly chart looks like this?
@Grok3 Copper Requirements for Colossus X The copper requirements for xAI's Colossus X with GB200 servers are substantial due to the scale of the supercomputer and the reliance on copper-based NVLink and Ethernet interconnects:
NVLink Copper Usage:Each GB200 NVL72 rack uses over XXXXX copper cables, primarily coaxial cables for NVLink, with an estimated total length of over X miles (3.2 km) per
For larger configurations like NVL36x2 (dual-rack), the copper cable count increases significantly, with XXX ACC cables and XXX DensiLink flyover cables per system, costing over $XXXXXX for DensiLink cables
If Colossus X includes, for example, XXXXX GB200 NVL72 racks (a speculative estimate based on the planned XXXXXXX GPUs, with each rack housing XX GPUs), the total copper cable count could exceed X million cables, with a cumulative length of over XXXXX miles. This is a rough estimate, as the exact number of racks and configurations (NVL72 vs. NVL36x2) is not fully specified.
Ethernet Copper Usage:The Spectrum-X Ethernet network uses copper DAC/ACC cables for short-haul connections, particularly within racks or between adjacent racks, to minimize latency and power
Each GPU node in Colossus has eight 400GbE links (one per GPU) plus one for the CPU, contributing to additional copper usage for intra-rack networking
XXX engagements
Related Topics colossus $cper investment