{"product_id":"mcp1660-w01ae30-mellanox-compatible-400g-qsfp-dd-1-5m","title":"MCP1660-W01AE30 NVIDIA\/Mellanox Compatible 400G QSFP-DD Passive DAC Cable — 1.5m","description":"\u003cp\u003e\u003cstrong\u003eQSFP-DD — not OSFP. Passive copper twinax, not optics.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNVIDIA \/ Mellanox MCP1660-W01AE30 compatible — 400G QSFP-DD passive DAC, 1.5m, 30AWG\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"border-left: 3px solid #1e8f5e; background: #f7f8fa; padding: 10px 14px; margin: 14px 0;\"\u003e→ \u003cstrong\u003e\u003ca href=\"\/blogs\/news\/osfp-vs-qsfp-dd-gpu-clusters\"\u003eOSFP vs QSFP-DD for GPU clusters\u003c\/a\u003e\u003c\/strong\u003e — form-factor fork that decides whether this cable fits your cage at all.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMellanox \/ NVIDIA Part Number:\u003c\/strong\u003e MCP1660-W01AE30\u003cbr\u003e\u003cstrong\u003eNVIDIA 980- Part Number:\u003c\/strong\u003e 980-9I35S-00W01A\u003cbr\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e 400GbE \/ 400Gb\/s passive Direct Attach Copper (DAC) cable, QSFP-DD to QSFP-DD, 1.5 meters, 30AWG twinax\u003c\/p\u003e\n\u003cp\u003eThis is a \u003cstrong\u003eQSFP-DD\u003c\/strong\u003e passive DAC — the short-reach copper interconnect for QSFP-DD 400G ports. It is \u003cstrong\u003enot\u003c\/strong\u003e an OSFP cable, and it is not a flat-top \/ RHS optical module. If your switch, NIC, or GPU node has an \u003cstrong\u003eOSFP\u003c\/strong\u003e cage, this part will not seat. Use the OSFP DAC family (for example MCP4Y10) instead.\u003c\/p\u003e\n\u003cp\u003eProgrammed for NVIDIA \/ Mellanox ecosystems and built to the QSFP-DD MSA. Hot-pluggable, near-zero power draw (passive), lifetime warranty from Resilient Tec.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhich One Do I Need?\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eGoing into\u003c\/th\u003e\n\u003cth\u003eYou need\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eQSFP-DD 400G ports, ~1.5m intra-rack run, copper is fine\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eMCP1660-W01AE30\u003c\/strong\u003e — this product (1.5m, 30AWG, passive DAC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSame QSFP-DD cages, 1m run\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/400g-qsfp-dd-breakout-dac-with-mellanox-nvidia-compatibility-download-compatibility-report-with-eeprom-data-msa-specs-and-implementation-guides\"\u003eMCP1660-W001E30 — 1m QSFP-DD passive DAC\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSame QSFP-DD cages, 2m run\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/400g-qsfp-dd-dac-2m-extended-reach-nvidia-mellanox-compatible-download-comprehensive-compatibility-report\"\u003eMCP1660-W002E30 — 2m QSFP-DD passive DAC\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOSFP cages (Quantum-2 twin-port, DGX H100\/H200 OSFP, ConnectX-7 OSFP)\u003c\/td\u003e\n\u003ctd\u003eOSFP DAC family (e.g. MCP4Y10) — \u003cstrong\u003enot this cable\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRuns longer than ~3m, or you need optical isolation \/ thinner cable plant\u003c\/td\u003e\n\u003ctd\u003e400G AOC or SR4\/DR4 optics — \u003cstrong\u003enot a passive DAC\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eForm factor is the first fork.\u003c\/strong\u003e QSFP-DD and OSFP do not mate. Ordering an OSFP-labeled 400G DAC for a QSFP-DD port — or the reverse — is the most common wrong order on this part family.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLength is the second fork.\u003c\/strong\u003e Passive 400G DAC is a short-reach tool. 1.5m (this PID) is the mid length in the MCP1660-W0xxEyy series (0.5 \/ 1 \/ 1.5 \/ 2 \/ 2.5 \/ 3m). Past that, move to AOC or optics.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMellanox \/ NVIDIA Part Number\u003c\/td\u003e\n\u003ctd\u003eMCP1660-W01AE30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNVIDIA 980- Part Number\u003c\/td\u003e\n\u003ctd\u003e980-9I35S-00W01A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003eQSFP-DD to QSFP-DD (not OSFP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Type\u003c\/td\u003e\n\u003ctd\u003ePassive Direct Attach Copper (DAC) \/ twinax\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Rate\u003c\/td\u003e\n\u003ctd\u003e400Gb\/s — 400GbE (400G-CR8 PAM4 class)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e1.5 m (≈ 4.9 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Gauge\u003c\/td\u003e\n\u003ctd\u003e30 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive — typically \u0026lt; 0.1W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocol\u003c\/td\u003e\n\u003ctd\u003e400GbE Ethernet; InfiniBand NDR where the host QSFP-DD port supports it\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHost Platforms\u003c\/td\u003e\n\u003ctd\u003eNVIDIA \/ Mellanox and MSA-compliant QSFP-DD 400G ports (switches, NICs, GPU nodes) — verify your exact platform matrix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eQSFP-DD MSA, IEEE 802.3ck \/ 400GBASE-CR8 class, RoHS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0°C to 70°C (commercial)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoding\u003c\/td\u003e\n\u003ctd\u003eCoded specifically for NVIDIA \/ Mellanox compatibility\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLifetime, backed by Resilient Tec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eNote on Reach: Why Passive DAC Stops Around 3m\u003c\/h2\u003e\n\u003cp\u003eNVIDIA’s MCP1660-W0xxEyy series tops out at \u003cstrong\u003e3 meters\u003c\/strong\u003e for passive 400G QSFP-DD copper. That is not a marketing preference — it is the practical limit of passive twinax at 400G before insertion loss and crosstalk eat the link. \u003cstrong\u003e1.5m\u003c\/strong\u003e (this part) sits in the middle of the family and is the usual choice for adjacent-rack or deep-rack QSFP-DD jumpers when 1m is short and 2m is longer than you need.\u003c\/p\u003e\n\u003cp\u003eIf your run is past ~3m, or you need a thinner cable for dense cable management, move to a 400G AOC or to SR4\/DR4 optics with the correct fiber. Do not stretch a passive DAC past its rated length and hope — the link will either refuse to train or fail intermittently under load.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eGood to Know\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis is QSFP-DD, not OSFP.\u003c\/strong\u003e Older listing copy on this SKU incorrectly said OSFP \/ RHS \/ flat-top. Those terms describe OSFP optical modules and OSFP DACs — a different cage. This cable only fits QSFP-DD ports.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePassive means no retimers in the cable.\u003c\/strong\u003e Power and heat stay on the host. That is why DAC wins for short intra-rack links, and why it loses past a few meters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSibling lengths we stock:\u003c\/strong\u003e \u003ca href=\"\/products\/400g-qsfp-dd-breakout-dac-with-mellanox-nvidia-compatibility-download-compatibility-report-with-eeprom-data-msa-specs-and-implementation-guides\"\u003eMCP1660-W001E30 (1m)\u003c\/a\u003e and \u003ca href=\"\/products\/400g-qsfp-dd-dac-2m-extended-reach-nvidia-mellanox-compatible-download-comprehensive-compatibility-report\"\u003eMCP1660-W002E30 (2m)\u003c\/a\u003e. Same family, same form factor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOSFP DAC is a different family\u003c\/strong\u003e (MCP4Y10 and related). If your BOM says OSFP, stop — this PID will not work.\u003c\/li\u003e\n\u003cli\u003eEEPROM is programmed for NVIDIA \/ Mellanox recognition. MSA-compliant third-party QSFP-DD hosts often work; always confirm against your platform’s supported transceiver \/ cable list for production fabrics.\u003c\/li\u003e\n\u003cli\u003eBend radius matters near the connector — treat the boot as a fixed radius zone, not a place to cinch zip-ties.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eQuick Checklist — Is This the Right Cable?\u003c\/h2\u003e\n\u003cp\u003eYou have two \u003cstrong\u003eQSFP-DD\u003c\/strong\u003e 400G ports. The run is about \u003cstrong\u003e1.5 meters\u003c\/strong\u003e. You want \u003cstrong\u003epassive copper\u003c\/strong\u003e (not AOC, not SR4\/DR4 optics). Your BOM or platform list accepts \u003cstrong\u003eMCP1660-W01AE30\u003c\/strong\u003e \/ \u003cstrong\u003e980-9I35S-00W01A\u003c\/strong\u003e. You are \u003cstrong\u003enot\u003c\/strong\u003e filling an OSFP cage.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eAvailability\u003c\/h2\u003e\n\u003cp style=\"border-left: 3px solid #1e8f5e; background: #f7f8fa; padding: 10px 14px; margin: 14px 0;\"\u003e\u003cstrong\u003eCurrently out of stock · Additional units typically available on short lead time.\u003c\/strong\u003e\u003cbr\u003eBuilding a rack or filling a spare kit? Tell us how many QSFP-DD 400G jumpers you need (1m \/ 1.5m \/ 2m) and we will quote the set. \u003ca href=\"\/pages\/request-a-quote\"\u003e\u003cstrong\u003eRequest a quote →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e lifetime, \u003ca href=\"\/pages\/lifetime-warranty\"\u003ebacked by Resilient Tec\u003c\/a\u003e — not a manufacturer term. When a cable fails you reach a named seller in the US, not a ticket queue.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eYou Might Also Need\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/400g-qsfp-dd-breakout-dac-with-mellanox-nvidia-compatibility-download-compatibility-report-with-eeprom-data-msa-specs-and-implementation-guides\"\u003eMCP1660-W001E30 — 400G QSFP-DD Passive DAC, 1m\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/400g-qsfp-dd-dac-2m-extended-reach-nvidia-mellanox-compatible-download-comprehensive-compatibility-report\"\u003eMCP1660-W002E30 — 400G QSFP-DD Passive DAC, 2m\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mcp4y10-n001-osfp-400g-ndr-infiniband-passive-dac-cable-1m-nvidia-dgx-h100-h200-1\"\u003eMCP4Y10-N001 — OSFP 400G NDR Passive DAC, 1m\u003c\/a\u003e — when the cage is OSFP, not QSFP-DD\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mcp4y10-n002-osfp-400g-ndr-infiniband-passive-dac-cable-2m-nvidia-dgx-h100-h200\"\u003eMCP4Y10-N002 — OSFP 400G NDR Passive DAC, 2m\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/product-guides\"\u003eProduct guides\u003c\/a\u003e · \u003ca href=\"\/pages\/request-a-quote\"\u003eRequest a quote\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eRelated Guides\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/news\/osfp-vs-qsfp-dd-gpu-clusters\"\u003eOSFP vs. QSFP-DD: A Practical Breakdown for GPU Clusters\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/news\/osfp-dac-cables-what-they-are-when-to-use-one\"\u003eOSFP DAC Cables — What They Are and When to Use One\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/nvidia-mellanox-interconnect-compatibility-guide\"\u003eNVIDIA \u0026amp; Mellanox Interconnect Compatibility Guide\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/lifetime-warranty\"\u003eLifetime warranty — how Resilient Tec backs what we sell\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/request-a-quote\"\u003eRequest a quote for 400G QSFP-DD DAC fills and spare kits\u003c\/a\u003e\u003c\/p\u003e\n","brand":"Resilient Tec","offers":[{"title":"Default Title","offer_id":49190524977252,"sku":"MCP1660-W01AE30","price":189.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/resilient-tec.com\/products\/mcp1660-w01ae30-mellanox-compatible-400g-qsfp-dd-1-5m","provider":"Resilient Tec","version":"1.0","type":"link"}