{"product_id":"mma4z00-ns-compatible-800g-osfp-sr8-finned-top-ihs-transceiver-quantum-2","title":"NVIDIA MMA4Z00-NS Compatible 800G OSFP SR8 Finned-Top (IHS) Twin-Port Transceiver — Dual MPO-12\/APC, for Quantum-2 QM9700\/QM9790","description":"\u003cp\u003e\u003cstrong\u003eFinned-Top (IHS) — the switch-side module, not the NIC-side module\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNVIDIA MMA4Z00-NS compatible — 800G OSFP SR8 twin-port, 850nm multimode, breaks out to 2 x 400G\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=\"\/pages\/nvidia-osfp-transceiver-part-number-crosswalk\"\u003eNVIDIA OSFP part-number crosswalk\u003c\/a\u003e\u003c\/strong\u003e — Mellanox MMA\/MMS numbers mapped to the new NVIDIA 980- numbers, with form factor, optics and the correct part for each end of the link.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM Equivalent:\u003c\/strong\u003e NVIDIA \/ Mellanox MMA4Z00-NS\u003cbr\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e Twin-port OSFP SR8 optical transceiver, 800Gb\/s, finned-top \/ Integrated Heat Sink (IHS), dual MPO-12\/APC, multimode\u003c\/p\u003e\n\u003cp\u003eThis is the \u003cstrong\u003efinned-top\u003c\/strong\u003e module — the one that goes in the switch, not the server. Air-cooled Quantum-2 switch ports have no heatsink of their own, so the module has to carry its own fins. Put this in a ConnectX-7 and it will not seat. Put a flat-top module in an air-cooled switch and it seats fine, looks like it worked, and has no cooling path at all.\u003c\/p\u003e\n\u003cp\u003eNVIDIA now calls this form factor \u003cstrong\u003eIHS\u003c\/strong\u003e, for \u003cstrong\u003eIntegrated Heat Sink\u003c\/strong\u003e — the fins are integrated into the module's own metal top. Older documentation and existing BOMs still say \"finned-top.\" Same part.\u003c\/p\u003e\n\u003cp\u003eIt is a twin-port module: \u003cstrong\u003e800G total, presenting as 2 x 400G.\u003c\/strong\u003e One of these serves two servers.\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\u003eAir-cooled Quantum-2 switch (QM9700 \/ QM9790)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eFinned-Top (IHS)\u003c\/strong\u003e — this product\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectX-7 \/ ConnectX-8 NIC, BlueField-3 DPU, DGX system\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/mma4z00-ns400-compatible-400g-osfp-sr4-flat-top-rhs-transceiver-connectx-7\"\u003eFlat-Top (RHS) — 400G single-port module\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eThe fins are either on the module or on the equipment. Never both, never neither.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe canonical topology: one twin-port finned module in the switch → two MPO-12\/APC patch cords → two flat-top modules in two ConnectX-7 servers. When you are sizing an order, that is the ratio — \u003cstrong\u003efor every two server ports, one switch module.\u003c\/strong\u003e\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\u003eOEM Equivalent\u003c\/td\u003e\n\u003ctd\u003eNVIDIA \/ Mellanox MMA4Z00-NS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003eTwin-port OSFP, Finned-Top (Integrated Heat Sink \/ IHS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Rate\u003c\/td\u003e\n\u003ctd\u003e800Gb\/s — 8 x 106.125Gb\/s PAM4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Interface\u003c\/td\u003e\n\u003ctd\u003eSR8 (presents as 2 x SR4), 850nm, multimode (MMF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eDual MPO\/MTP-12 APC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReach\u003c\/td\u003e\n\u003ctd\u003e30m OM3 \/ 50m OM4 — see note below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreakout\u003c\/td\u003e\n\u003ctd\u003e1 x 800G, or 2 x 400G to two flat-top modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHost Platforms\u003c\/td\u003e\n\u003ctd\u003eQuantum-2 air-cooled InfiniBand switches (QM9700, QM9790)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDOM \/ DDM\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoding\u003c\/td\u003e\n\u003ctd\u003eCoded specifically for NVIDIA \/ Mellanox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eOSFP MSA, IEEE 802.3ck, Class 1 laser, RoHS\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 You'll See Both 50m and 100m\u003c\/h2\u003e\n\u003cp\u003eNVIDIA specifies \u003cstrong\u003e50m over OM4\u003c\/strong\u003e, and that is the figure to design against in an InfiniBand fabric. The optics are built to the SR MSA, which permits up to 100m over OM4 — both numbers are correct, they answer different questions. The standard describes what the optics \u003cem\u003ecan\u003c\/em\u003e do under ideal conditions; NVIDIA's number is what they will \u003cem\u003esupport\u003c\/em\u003e.\u003c\/p\u003e\n\u003cp\u003eUsable reach past 50m depends on fiber grade and how many MPO matings sit in the path, because every additional mating costs optical budget. \u003cstrong\u003eDesign to 50m for NVIDIA support parity.\u003c\/strong\u003e Planning a longer run? \u003ca href=\"\/pages\/request-a-quote\"\u003eTalk to us first\u003c\/a\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eGood to Know\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThis module will not seat in a ConnectX-7 OSFP port. The port cage carries its own riding heatsink and there is no clearance for fins.\u003c\/li\u003e\n\u003cli\u003e800G is not an upgrade at the server end — the ConnectX-7 OSFP port is a 400G port. If you are buying for a NIC, you want the \u003ca href=\"\/products\/mma4z00-ns400-compatible-400g-osfp-sr4-flat-top-rhs-transceiver-connectx-7\"\u003e400G flat-top module\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid-cooled switch deployment?\u003c\/strong\u003e This is the air-cooled part. Liquid-cooled cold plates contact a flat surface, so those deployments need the 800G \u003cem\u003eflat-top\u003c\/em\u003e variant, \u003cstrong\u003eMMA4Z00-NS-FLT\u003c\/strong\u003e. We do not stock it — but that is the part number to specify, and if someone has quoted you the finned part for a liquid-cooled switch, that quote is wrong.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMMS4X00-NM\u003c\/strong\u003e and \u003cstrong\u003eMMS4X00-NS\u003c\/strong\u003e are the 800G single-mode DR8 variants. The MMA \/ MMS prefix is the tell: MMA is multimode, MMS is single-mode.\u003c\/li\u003e\n\u003cli\u003eRunning single-mode? This is not your module. Tell us what the fiber plant is and we will point you at the right part rather than sell you this one.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eQuick Checklist — Is This the Right Module?\u003c\/h2\u003e\n\u003cp\u003eYou are populating a port on an air-cooled Quantum-2 InfiniBand switch (QM9700 or QM9790). The port has no heatsink of its own. Your fiber plant is multimode (OM3 or OM4) with MPO-12\/APC connectors. Your runs are 50m or shorter. You want one switch port to feed two 400G server ports.\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\u003eIn stock: 1 · Additional units ship on a 7–10 day lead time.\u003c\/strong\u003e\u003cbr\u003eBuilding a cluster? Tell us how many ports you are populating and we will quote the switch-side and server-side modules together. \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 module fails you reach a named seller in Knoxville, Tennessee, 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\n\u003ca href=\"\/products\/mma4z00-ns400-compatible-400g-osfp-sr4-flat-top-rhs-transceiver-connectx-7\"\u003e400G OSFP SR4 Flat-Top (RHS) transceiver\u003c\/a\u003e — the server-side pair. Order two per module of these.\u003c\/li\u003e\n\u003cli\u003eMPO-12\/APC multimode patch cords, Type B polarity — two per twin-port module\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/blogs\/news\/osfp-dac-cables-what-they-are-when-to-use-one\"\u003eOSFP DAC cables\u003c\/a\u003e — when the run is short enough that copper beats optics\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/product-guides\"\u003eProduct guides\u003c\/a\u003e — structured cabling, switches and the rest of the rack\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-flat-top-vs-finned-top-which-module\"\u003eFlat-Top or Finned-Top OSFP? How to Tell Which Module Your ConnectX-7 Actually Needs\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/nvidia-osfp-transceiver-part-number-crosswalk\"\u003eNVIDIA OSFP Part-Number Crosswalk: Mellanox MMA\/MMS to NVIDIA 980- Numbers\u003c\/a\u003e\u003c\/p\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","brand":"Resilient Tec","offers":[{"title":"Default Title","offer_id":49073639555172,"sku":"MMA4Z00-NS-GT","price":749.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/3482\/4548\/files\/Screenshot2026-08-26165850.png?v=1787777999","url":"https:\/\/resilient-tec.com\/products\/mma4z00-ns-compatible-800g-osfp-sr8-finned-top-ihs-transceiver-quantum-2","provider":"Resilient Tec","version":"1.0","type":"link"}