HPE DL340 G12 Front GPU 8SFF X4 R1S DAC - P77397-B21

HPE P77397-B21 DL340 Gen12 Front GPU 8SFF X4 R1S DAC

The HPE P77397-B21 is a factory-new, genuine HPE direct-attach cable and bay-routing assembly designed for the ProLiant DL340 Gen12 platform. It enables front-panel GPU connectivity alongside eight small form factor (SFF) drive bays via an x4 riser-1-slot (R1S) configuration — a configuration-specific internal component that must match your exact DL340 Gen12 chassis build. If you are expanding GPU capacity or replacing a damaged front bay cable assembly in a DL340 Gen12, the P77397-B21 (often searched as P77397 B21) is the HPE-specified part for this configuration.

Overview

This assembly bridges the front GPU slot and the 8SFF drive bay backplane within the DL340 Gen12 chassis. The "DAC" designation refers to the direct-attach cabling harness that routes signal between the riser and backplane — a chassis-internal component rather than an external cable. At 0.75 lb, the assembly is lightweight and designed for tool-assisted installation within HPE's standard rack server chassis. Sourced factory-new as a genuine HPE component, it carries no grey-market or parallel-import risk for server builds requiring HPE-validated hardware.

Key Features

• DL340 Gen12 Platform Fit: Engineered specifically for the ProLiant DL340 G12 chassis — not a universal fit. Confirm your chassis part number before ordering to avoid a mismatch with adjacent DL360/DL380 Gen12 variants.
• 8SFF + Front GPU Routing: Supports eight small form factor drive bays simultaneously with front GPU lane routing via x4 R1S — useful for compute-plus-storage configurations where GPU and local NVMe/SAS coexist in the front bay.
• Lightweight Assembly (0.75 lb): Minimal mass means no additional load concerns during chassis service; straightforward single-technician installation without special lifting requirements.
• Genuine HPE Component: Manufactured in China under HPE supply chain controls (UNSPSC 26121620 — power cabling assemblies); factory-new condition ensures connector integrity on first installation.

Integration & Compatibility

The P77397-B21 is validated for the HPE ProLiant DL340 Gen12 server platform. Compatibility with other HPE ProLiant generations (Gen10, Gen10 Plus, Gen11) or adjacent DL-series models is not confirmed by available evidence — consult the HPE server components catalog or HPE's QuickSpecs for your chassis model before ordering. For broader server components and accessories, verify the specific HPE part number against your chassis service manual.

Frequently Asked Questions

Q: What server platform is the HPE P77397-B21 compatible with?

A: The P77397-B21 is designed for the HPE ProLiant DL340 Gen12 (G12) server platform. Compatibility with other HPE generations or DL-series models is not confirmed — verify against your chassis QuickSpecs before ordering.

Q: What does "8SFF X4 R1S DAC" mean in the part name?

A: 8SFF = eight small form factor drive bays; X4 = x4 PCIe lane width; R1S = Riser 1 Slot position; DAC = Direct Attach Cable harness. Together, this identifies the specific front bay cabling assembly that routes GPU and drive backplane connections within the DL340 G12 chassis.

Q: How much does the P77397-B21 weigh?

A: The assembly weighs 0.75 lb, making it a lightweight internal component suitable for standard tool-assisted rack server servicing.

Q: Is the P77397-B21 a new or refurbished part?

A: The P77397-B21 is sourced as a factory-new, genuine HPE component — no refurbished or grey-market stock.

Q: Where is the HPE P77397-B21 manufactured?

A: Country of origin is China (CN), manufactured under HPE's supply chain as a genuine HPE assembly.

James Everett

The P77397-B21 is one of those parts that looks trivial until you are standing in front of an open DL340 G12 chassis with a GPU expansion project stalled because the front bay routing assembly is either missing or the wrong revision. At 0.75 lb, it is not a heavy lift — but getting the wrong HPE part number here means the front GPU slot and 8SFF backplane will not connect correctly, and you will not know until power-on.

Technical Highlights:

• Platform Specificity: The "G12" designation in the part name is not decorative — this assembly is designed for Gen12 chassis geometry. A Gen11 equivalent part will not seat correctly in the DL340 G12 bay layout.
• X4 R1S Routing: The x4 riser-1-slot configuration determines which PCIe lanes feed the front GPU; ordering the wrong riser slot variant (R2S, for example) routes to the wrong physical slot, silently degrading GPU bandwidth.
• Factory-New Condition: Internal cable harnesses and backplane connectors degrade with reseating cycles; a factory-new genuine HPE assembly eliminates the connector-wear risk present in pulled or refurbished parts.

Deployment Considerations:

• Before ordering, cross-reference the P77397-B21 against your DL340 Gen12 chassis service manual and the HPE QuickSpecs for your specific chassis configuration option — front bay kit compatibility depends on whether your build includes the optional GPU riser.
• No datasheet or HPE QuickSpecs were available in the evidence reviewed; if your chassis has a non-standard front bay configuration, confirm with HPE pre-sales engineering before purchase to avoid a compatibility mismatch.

The P77397-B21 is the right call for a DL340 Gen12 chassis refresh or GPU-expansion build where the front bay DAC assembly is the identified missing or failed component — not a speculative spare for adjacent ProLiant models.