Vitex VD-8CDR8CM-AA 800G QSFP-DD DR8 single-mode transceiver

Vitex VD-8CDR8CM-AA 800G QSFP-DD DR8 single-mode transceiver (detail view)

800G 2xDR4/DR8 QSFP-DD SMF 1310nm 500m Dual MPO-12 Ethernet/InfiniBand Transceiver, MSA Compliant

Name: 800G 2xDR4/DR8 QSFP-DD SMF 1310nm 500m Dual MPO-12 Ethernet/InfiniBand Transceiver, MSA Compliant
Brand: Vitex LLC
SKU: VD-8CDR8CM-AA
Price: 1100.00 USD
Availability: InStock

Vitex Part #: VD-8CDR8CM-AA

The VD-8CDR8CM-AA is an 800G QSFP-DD DR8 optical transceiver for Ethernet-based AI data center and cloud spine-leaf fabrics. It supports 8x 100 Gb/s PAM4 parallel lanes over single-mode fiber, delivering 800 Gb/s aggregate throughput up to 500m via dual MPO-12 APC connectors. The QSFP-DD form factor offers backward port compatibility with existing 400G QSFP-DD slots, easing migration from 400G to 800G without switch replacement.

Best suited for QSFP-DD Ethernet switch platforms. The module is NOT compatible with NVIDIA Quantum or Spectrum platforms (which require the OSFP form factor at 800G). Compliant with QSFP-DD HW Specification Rev 6.3, IEEE 802.3ck, and CMIS 5.0.

Features
Specifications
Applications
FAQs
Datasheet

800 Gb/s aggregate data rate (8x 100 Gb/s PAM4)
QSFP-DD form factor (Type 2A housing)
Up to 500m reach over SMF with RS(544,514) FEC
Dual MPO-12 APC optical interface
Native 2x 400G-DR4 breakout for QSFP-DD switches
EML transmitter and PIN photodiode receiver array
Backward port-compatible with existing 400G QSFP-DD slots
Compliant with QSFP-DD MSA Rev 6.3, IEEE 802.3ck, CMIS 5.0
Full DDM telemetry over two-wire serial interface
Commercial temperature 0 to 70 degC; Maximum power 14.5 W
RoHS 2 and REACH compliant
US-based engineering support from New Jersey HQ

Category	Optical Transceiver
Form Factor	QSFP-DD (Type 2A)
Data Rate	800 Gb/s (8x 100 Gb/s PAM4)
Wavelength	1310 nm
Fiber Type	Single-Mode Fiber (SMF)
Distance	500m
Connector	Dual MPO-12 APC
Protocol	Ethernet
Breakout	2x 400G-DR4
Optics	EML TX / PIN PD RX
FEC	RS(544,514) host-side
Management	CMIS 5.0, DDM
Power Supply	3.3 V single supply
Max Power	14.5 W max
Temperature	Commercial (0 to 70 degC)
Compliance	QSFP-DD MSA Rev 6.3, IEEE 802.3ck, CMIS 5.0, RoHS 2

Ethernet AI Data Center Spine-Leaf Cloud Provider 800G Fabrics Hyperscaler Data Center Interconnect 400G to 800G Migration on QSFP-DD Platforms AI/HPC Cluster Ethernet Connectivity

Q: Is the Vitex 800G QSFP-DD DR8 compatible with NVIDIA switches?
A: No. NVIDIA Spectrum and Quantum 800G platforms use the OSFP form factor exclusively. For NVIDIA, use the Vitex VO-8CDR8CM-AA (800G OSFP DR8 IHS). This QSFP-DD variant is for Ethernet switch platforms that use QSFP-DD ports.

Q: Which Ethernet switches is this validated on?
A: QSFP-DD 800G Ethernet switch platforms. Contact Vitex engineering for the latest validation matrix on your specific switch model and firmware.

Q: When should I choose QSFP-DD vs OSFP at 800G?
A: QSFP-DD makes sense when your switch already has QSFP-DD ports and you want backward compatibility with existing 400G QSFP-DD slots. OSFP is required for NVIDIA platforms and offers higher power budget (better thermal headroom) for next-generation 1.6T modules. Match the form factor to your switch.

Q: Can I use this in a 400G QSFP-DD slot?
A: The physical port is backward-compatible, but the slot must support 800G data rates (8x 100G PAM4 lanes at the SerDes level). Older 400G-only QSFP-DD switches will not drive an 800G module. Verify your switch ASIC supports 800G per port before deployment.

Q: Can I break out into 2x 400G-DR4?
A: Yes. The module supports a native 2x 400G-DR4 breakout configuration with an MPO-12 to 2x MPO-12 breakout fiber. Each branch becomes an independent 400G-DR4 port.

Q: What fiber type and polarity do I need?
A: Single-mode fiber with MPO-12 APC connectors, Type B polarity for parallel optics, and female (unpinned) connectors on both ends. See the Vitex M12FOM4 fiber assemblies.

Q: How does Vitex compare to other vendors on price?
A: Vitex typically delivers in. Pricing is competitive with leading third-party brands. Every module is, with US-based engineering support and a

Technical Documentation

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