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HPE ProLiant RL300 Gen11 1U rack server, silver front panel with eight drive bays

HPE

HPE ProLiant RL300 Gen11 M128-30 128-core 128GB 480GB M.2 800W P76339-B21

SKU CH-MK04-1CZQW MPN P76339-B21

1U rack server with a 3.0 GHz 128-core Ampere Altra Max processor, 128 GB DDR4 memory, 480 GB M.2 SSD, dual-port 10/25 Gb network adapter and an 800 W titanium power supply

  • ProcessorAmpere Altra Max
  • Installed RAM128 GB (4 × 32 GB, 3200 MT/s)
  • Processor core count128-Core Processor
  • Type of memoryHPE DDR4 Smart Memory
  • Rack height1U
  • Processor speedM128-30 (3 GHz)
  • 128-core Ampere Altra Max processor at 3.0 GHz for high-density cloud workloads
  • 128 GB DDR4 Smart Memory in four 32 GB modules running at 3200 MT/s
  • Dual-port 10/25Gb Mellanox SFP28 OCP3 adapter for flexible network connectivity
  • Eight SFF drive bays with one 480 GB M.2 SSD pre-installed
  • Single 800W Flex Slot Titanium hot-plug power supply for efficient 1U rack deployment

Cloud-Native Rack Server

The HPE ProLiant RL300 Gen11 M128-30 is a 1U rack server built for cloud-native workloads. It ships with a single Ampere Altra Max M128-30 processor running at 3.0 GHz across 128 cores and 128 GB of HPE DDR4 Smart Memory. This configuration targets service providers and digital-first enterprises modernising their infrastructure.

Capacity and Headroom

The system includes 128 GB of memory at 3200 MT/s across four 32 GB modules and a single 480 GB M.2 SSD. Eight SFF bays provide room for additional local storage when workloads demand more capacity. Two PCIe Gen4 x16 slots and two OCP 3.0 slots allow I/O expansion, while the 800W titanium power supply supports the 250W processor and installed components.

Single-Socket Constraint

Only one processor socket is present and the maximum processor count is one, so CPU performance cannot be scaled by adding a second socket. Buyers needing dual-socket density or higher core counts per chassis must choose a different platform.

How it compares

Measured against everything we stock in Rack & Tower Servers, at today’s prices. Recalculated every night.

Price $4,885.99
Pricier than about 76% of the 17,641 comparable items (median $1,910.99).
Installed RAM 128 GB (4 × 32 GB, 3200 MT/s)
Typical for this category: the median of 15,103 items is 128 GB.
Processor core count 128-Core Processor
Higher than about 99% of the 7,955 comparable items (median 16).

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Specifications

Product
Brand nameHPE
Product lineProLiant RL300 G11
Model nameM128-30
Part numberP76339-B21
Product typeRack
Processor
ProcessorAmpere Altra Max
Processor core count128-Core Processor
Processor speedM128-30 (3 GHz)
Processor cache16 MB L3 Cache
Processor details250 W
Installed CPUs1
Max supported CPUs1
Memory
Installed RAM128 GB (4 × 32 GB, 3200 MT/s)
Type of memoryHPE DDR4 Smart Memory
Storage
Drive bays8 SFF supported
Connectivity
Network controllerMellanox MCX631432AS-ADAI Ethernet 10/25Gb 2-port SFP28 OCP3 Adapter for HPE
Ports & slots
Expansion card slots2 PCIe Gen4 x16 slots, 2 PCIe Gen4 OCP 3.0 slots
Power
Power supply1 x HPE 800 W Flex Slot Titanium Hot Plug Low Halogen Power Supply Kit
Size & build
Rack height1U
Shipping weight22.68 kg
Package size914 × 610 × 229 mm

Questions about this item

Will my existing DDR4-3200 DIMMs work alongside the 4 x 32 GB modules already installed?

Yes, the server uses HPE DDR4 Smart Memory at 3200 MT/s, so matching DDR4-3200 modules can populate the remaining slots.

How can I verify the Mellanox MCX631432AS-ADAI 10/25Gb SFP28 adapter is operating at 25 Gb/s after installation?

Check the link speed in the OS network settings or the iLO interface; a negotiated 25 Gb/s rate confirms the dual-port OCP3 adapter is running at full speed.

Does the box include SFP28 transceivers or direct-attach cables for the 10/25Gb network ports?

The server ships with the dual-port SFP28 OCP3 adapter, one 480 GB M.2 SSD, one 800W power supply and the 128 GB memory installed; transceivers or DAC cables must be purchased separately.

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