H3C · R5300 G6

H3C UniServer R5300 G6

H3C UniServer R5300 G6 is a flagship 4U GPU server for LLM training and generative AI with flexible GPU topology.

Up to 2 4th/5th Gen Intel Xeon processors; validate the exact CPU against the server compatibility list
32 DDR5 slots; family maximum 12TB, subject to CPU, DIMM and configuration limits
4U air-cooled platform; qualify direct/switch and 12/24-bay variants separately
Qualify GPUs, NVLink Bridges and NICs up to 400GE against the selected module and supported-parts list

Published model specifications describe available options, not the delivered configuration.

Configurations & prices

Listed prices are indicative; confirm tax, stock, compatibility, lead time and service in a written quotation.

Specification scope	R5300 G6 family capabilities, not the installed specification of every quoted SKU. Validate topology, drive cage and components against the approved BOM.

Platform processor support	Up to 2 4th/5th Gen Intel Xeon Scalable processors; validate the selected CPU and cooling configuration against the compatibility list.
Platform core-count limit	Up to 64 cores per processor; this is not the installed core count.
Processor power qualification	The current product page lists up to 385W, while User Guide 6W106 lists 350W. Resolve this revision difference using the approved CPU, heatsink and server configuration.

Memory slots	32 DDR5 DIMM slots: 8 channels per CPU, 2 slots per channel; the corresponding CPU must be installed.
Memory capacity conditions	The family maximum is 12TB with two CPUs. Guide 6W106 lists up to 6TB per 4th Gen CPU and 4TB per 5th Gen CPU. A 12TB configuration requires qualification of the exact CPU, DIMMs and server.
Operating memory speed	The platform maximum of 5600MT/s requires a suitable CPU and 1DPC. Guide 6W106 lists 4800 for 4th Gen 1DPC, 5600 for 5th Gen 1DPC, and 4400MT/s for 2DPC. Individual CPU limits may be lower.
CXL and HBM options	The official family page lists CXL 1.1 and HBM as restricted options. Confirm availability, CPU/component compatibility and capacity separately; do not count them as installed DDR5 or GPU VRAM.

Drive-cage configuration	Family options provide 12 or 24 2.5/3.5-inch SAS/SATA/NVMe bays. Do not apply the 24-bay capacity to a 12LFF model.
NVMe bays	Up to 8 NVMe bays, subject to the UniBay backplane, cabling, controller and configuration; this does not mean 8 drives are installed.
Onboard M.2	The platform supports 2 onboard M.2 devices; confirm actual drives, boot configuration and compatibility in the BOM.
RAID capabilities	RAID levels and Tri-Mode depend on the selected controller, licence and drives. The family lists 0/1/10/5/6/50/60; not every controller supports every level.

GPU topology	Family modules include 4-slot direct, 8-slot direct, 8-slot switch and 16-slot switch variants. Slot and GPU limits are module-specific.
GPU qualification boundary	8-slot direct/switch, 4-slot direct and 16-slot switch modules have different limits. The website also lists conditional maxima of 10 double-width, 6 double-width or 20 single-width GPUs; these are not universal installation guarantees.
PCIe slot reference	The 8-slot direct module has 10 standard slots; the 8-slot switch module has 8 GPU slots plus 4 single-width slots. Refer to separate tables for 4-slot direct and 16-slot switch modules.
NVLink interconnect	Requires compatible GPUs and an optional NVLink Bridge. The guide describes bridging two adjacent GPUs; this is not an 8-GPU NVLink fabric or support for every GPU model.

Network expansion	The official family specification lists 1/10/25/50/100/200/400GE PCIe NICs. Confirm NIC and port speeds against the supported-parts list; 800G OSFP is not promised.
OCP slot	1 OCP 3.0 interface. Multi-host is conditional; validate the specific NIC, cables and server configuration.
Management port	1 dedicated 1GbE management port.

Power-supply options	4-module power architecture. Family options include 2000/2400/2700W Platinum and 3200W Titanium modules; confirm availability, input voltage and part numbers.
Power redundancy	The family specification lists N+N hot-swap power redundancy. Usable redundant power depends on installed modules and load; do not substitute a universal 1+1 claim or fan N+1 redundancy.
Standard cooling	8 hot-swap 8056 fans with N+1 redundancy (4 dual-fan modules); this is not evidence of a liquid-cooled configuration.

Form factor	4U rack-mount.
Chassis dimensions	174.8×447×828mm (H×W×D, without the security bezel); depth with the bezel is 856mm.
Operating temperature	Family standard operating range: 5–35°C, subject to CPU, GPU, drive and configuration restrictions.