Specifications

MCX556M-ECAT-S25 Specifications

Physical	Low Profile Adapter Card Size: 6.6 in. x 2.71 in. (167.65mm x 68.90mm) Auxiliary PCIe Connection Card Size: 4.44 in. x 1.57 in. (113.0mm x 40.00mm) Slim-Line SAS Cable: 9.8 in. x 1.02 in. (250cm x 25.95mm)
Physical	Connector: Dual QSFP28 InfiniBand and Ethernet (copper and optical)
Protocol Support	InfiniBand: IBTA v1.3^a Auto-Negotiation: 1X/2X/4X SDR (2.5Gb/s per lane), DDR (5Gb/s per lane), QDR (10Gb/s per lane), FDR10 (10.3125Gb/s per lane), FDR (14.0625Gb/s per lane), EDR (25Gb/s per lane) port
	Ethernet: 100GBASE-CR4, 100GBASE-KR4, 100GBASE-SR4, 50GBASE-R2, 50GBASE-R4, 40GBASE-CR4, 40GBASE-KR4, 40GBASE-SR4, 40GBASE-LR4, 40GBASE-ER4, 40GBASE-R2, 25GBASE-R, 20GBASE-KR2, 10GBASE-LR,10GBASE-ER, 10GBASE-CX4, 10GBASE-CR, 10GBASE-KR, SGMII, 1000BASE-CX, 1000BASE-KX, 10GBASE-SR
	Data Rate	InfiniBand	SDR/DDR/QDR/FDR/EDR
	Data Rate	Ethernet	1/10/25/40/50/100 Gb/s
	PCI Express Gen3: SERDES @ 8.0GT/s, 2x x8 lanes (2.0 and 1.1 compatible) PCIe 3.0 x16 bus can supply a maximum bandwidth of 128Gb/s only (=16 * 8GT/s, including overhead), and therefore cannot support 200Gb/s when both network ports of MCX556A-ECAT run at 100Gb/s.
Power and Airflow	Voltage: 12V
	Power	Cable
	Typical Power^b	Passive Cables	17.1W
	Maximum Power	Passive Cables	20.0W
		1.5W Active Cables	23.3W
		2.5W Active Cables	25.5W
	Maximum power available through QSFP28 port: 5W
	Airflow: see Airflow Specifications
Environmental	Temperature	Operational	0°C to 55°C
	Temperature	Non-operational	-40°C to 70°C^c
	Humidity	Operational	10% to 85% relative humidity
	Humidity	Non-operational	10% to 90% relative humidity
	Altitude (Operational)	3050m
Regulatory	Safety: CB / cTUVus / CE
	EMC: CE / FCC / VCCI / ICES / RCM
	RoHS: RoHS compliant

^a The ConnectX-5 adapters supplement the IBTA auto-negotiation specification to get better bit error rates and longer cable reaches. This supplemental feature only initiates when connected to another NVIDIA InfiniBand product.
^b Typical power for ATIS traffic load.
^c The non-operational storage temperature specifications apply to the product without its package.

MCX556M-ECAT-S35A Specifications

	Power	Cable
Physical	Low Profile Adapter Card Size: 6.6 in. x 2.71 in. (167.65mm x 68.90mm) Auxiliary PCIe Connection Card Size: 4.44 in. x 1.57 in. (113.0mm x 40.00mm) Slim-Line SAS Cable: 9.8 in. x 1.02 in. (350cm x 25.95mm)
Physical	Connector: Dual QSFP28 InfiniBand and Ethernet (copper and optical)
Protocol Support	InfiniBand: IBTA v1.3^a Auto-Negotiation: 1X/2X/4X SDR (2.5Gb/s per lane), DDR (5Gb/s per lane), QDR (10Gb/s per lane), FDR10 (10.3125Gb/s per lane), FDR (14.0625Gb/s per lane), EDR (25Gb/s per lane) port
	Ethernet: 100GBASE-CR4, 100GBASE-KR4, 100GBASE-SR4, 50GBASE-R2, 50GBASE-R4, 40GBASE-CR4, 40GBASE-KR4, 40GBASE-SR4, 40GBASE-LR4, 40GBASE-ER4, 40GBASE-R2, 25GBASE-R, 20GBASE-KR2, 10GBASE-LR,10GBASE-ER, 10GBASE-CX4, 10GBASE-CR, 10GBASE-KR, SGMII, 1000BASE-CX, 1000BASE-KX, 10GBASE-SR
	Data Rate	InfiniBand	SDR/DDR/QDR/FDR/EDR
	Data Rate	Ethernet	1/10/25/40/50/100 Gb/s
	PCI Express Gen3: SERDES @ 8.0GT/s, 2x x8 lanes (2.0 and 1.1 compatible) PCIe 3.0 x16 bus can supply a maximum bandwidth of 128Gb/s only (=16 * 8GT/s, including overhead), and therefore cannot support 200Gb/s when both network ports of MCX556A-ECAT run at 100Gb/s
Adapter Card Power	Voltage: 12V
	Typical Power^b	Passive Cables	17.1W
	Maximum Power	Passive Cables	20.0W
		1.5W Active Cables	23.3W
		2.5W Active Cables	25.5W
	Maximum power available through QSFP28 port: 5W
Active Auxiliary PCIe Connection Card Power	Typical Power	1.46W
	Maximum Power	1.85W
	Airflow: see Airflow Specifications
Environmental	Temperature	Operational	0°C to 55°C
	Temperature	Non-operational	-40°C to 70°C^c
	Humidity	Operational	10% to 85% relative humidity
	Humidity	Non-operational	10% to 90% relative humidity
	Altitude (Operational)	3050m
Regulatory	Safety: CB / cTUVus / CE
	EMC: CE / FCC / VCCI / ICES / RCM
	RoHS: RoHS compliant

^a The ConnectX-5 adapters supplement the IBTA auto-negotiation specification to get better bit error rates and longer cable reaches. This supplemental feature only initiates when connected to another NVIDIA InfiniBand product.
^b Typical power for ATIS traffic load.
^c The non-operational storage temperature specifications apply to the product without its package.

Airflow Specifications

Airflow (LFM)

Airflow Direction - Heat Sink to Port

Cable Type

Passive

Active 1.5W

Active 2.5W

Active 3.5W

Active 5W

MCX556M-ECAT-S25

400

500

600

900

MCX556M-ECAT-S35A

400

500

600

900

LED Specifications

See LED Interface.

Board Mechanical Drawings and Dimensions

All dimensions are in millimeters. All the mechanical tolerances are +/- 0.1mm.

Dual-port Adapter Card	Auxiliary PCIe Connection Card

Slim-Line SAS Cable (25cm)	Slim-Line SAS Cable (35cm)

Bracket Mechanical Drawing

Adapter Card Tall Bracket	Auxiliary PCIe Connection Card Tall Bracket

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