QDD-8X100G-DR-03=: Cisco’s 800G QSFP-DD DR8
Decoding the QDD-8X100G-DR-03= Naming Convention�...
Third-party teardowns reveal the HCI-PSU1-1600W= combines Delta Electronics’ DSP-1600AB platform with modified firmware. Compared to Cisco’s certified UCSB-PSU-1600W module:
Independent testing shows 28% higher voltage ripple at 90% load compared to Cisco OEM units. The absence of Cisco’s copper-core transformer design exacerbates thermal stress during sustained 240VAC operation.
Deployed in 12-node HXDP 5.5(2a) clusters:
UCS Manager Log:
PSU_02: Invalid PMBus response (CMD 0x8B: Expected 0x3A, Received 0x7E)
Redundancy Protocol Conflicts
Third-party PSUs disable Cisco’s Adaptive Power Sharing Algorithm, forcing manual load balancing
Workaround Requirements
Bypass firmware validation via:
hxcli power psu-validation-override = force
Metric | UCSB-PSU-1600W | HCI-PSU1-1600W= |
---|---|---|
12V Rail Stability (±%) | 0.8% | 2.1% |
Efficiency @ 50% Load | 94.5% (Titanium) | 91.2% (Platinum) |
Hot-Swap Recovery Time | 18ms | 43ms |
Third-party units exhibit 3.2x higher inrush current during cold starts, risking upstream circuit breakers.
While priced 35% below Cisco’s $3,200 MSRP:
Q: Compatible with UCS 6454 Fabric Interconnects?
A: Requires manual PMBus profile injection via ucs-pmbus-tool --force-overwrite
Q: Supports N+1 Redundancy in HyperFlex Edge?
A: Partial – limits redundant capacity to 67% vs Cisco’s 80% threshold
For validated Cisco HyperFlex power solutions, explore HCI-PSU1-1600W= alternatives.
Third-party PSUs create invisible power stability risks in hyperconverged environments. During a 64-node HyperFlex expansion:
The HCI-PSU1-1600W= exemplifies the false economy of non-OEM power in mission-critical clusters. While adequate for development environments, production systems demand Cisco’s rigorous thermal and electrical validation – especially when supporting AI/ML workloads with 400G GPUs. The 1600W capacity point magnifies risks: a 2% efficiency drop per PSU can translate to $18,000+ annual energy waste in a 48-node cluster. For enterprises running real-time analytics or financial transaction systems, only Cisco-certified PSUs deliver the nanosecond-level power consistency hyperconverged architectures require.