HPE P07646-B21 32GB DDR4-3200 Memory

HPE P07646-B21 32GB Dual Rank x4 DDR4-3200 Registered Smart Memory Kit

For AMD EPYC based ProLiant Gen10 Plus servers, HPE’s 32GB memory option is the P07646-B21. It is a dual rank x4 registered DIMM rated at DDR4-3200 with CAS 22 timings, listed in the DL385 Gen10 Plus QuickSpecs alongside 8GB, 16GB, 64GB and larger load reduced kits.

32GB per slot is often the sweet spot on these platforms. Sixteen modules, one in every channel of a two socket server, give 512GB at the full 3200 MT/s rate, enough for most virtualisation and database hosts without moving to 64GB modules.

Euroland IT Store offers the P07646-B21 as New or Refurbished, depending on stock. Select either to view its condition details and warranty.

Key Features At A Glance

• 32GB DDR4-3200 RDIMM for AMD EPYC Gen10 Plus servers
• Dual rank x4 organisation with ECC
• CAS 22-22-22 timings, PC4-3200AA-R
• 512GB at 3200 MT/s with one module per channel in a 2P server
• HPE SmartMemory recognised by Gen10 Plus firmware
• Offered New or Refurbished, subject to stock

Same Description, Different Part: P07646-B21 And P06033-B21

HPE sells two 32GB dual rank x4 DDR4-3200 kits that read almost identically in a price list. P07646-B21 is the kit listed for AMD EPYC Gen10 Plus servers, while P06033-B21 is the one listed for Intel Gen10 Plus servers such as the DL380 Gen10 Plus. Their spare numbers differ too: P20503-001 for this AMD kit and P21674-001 for the Intel kit.

Spares references also list different assembly numbers, P11444-191 for P07646-B21 and P11444-091 for P06033-B21. Because HPE qualifies options per platform, order the part number named in your own server’s QuickSpecs.

Population Rules On AMD Gen10 Plus

The DL385 Gen10 Plus has 32 DIMM slots, with eight channels and two slots per channel on each processor. HPE states that 3200 MT/s memory runs at 3200 MT/s at one DIMM per channel and at 2933 MT/s at two. Filling all 32 slots with this kit gives 1TB at the lower rate.

HPE also lists these restrictions for the platform: x4 and x8 memory cannot be mixed, and RDIMMs cannot be combined with LRDIMMs or 3DS LRDIMMs. If the server already holds x8 modules, such as the 16GB P07642-B21, plan a full set change rather than adding this x4 kit next to them.

Empty Slots And DIMM Blanks

When you populate only some of the 32 slots, the rest stay empty. HPE lists a DIMM blank kit, P07818-B21, for the DL385 Gen10 Plus, but notes it is required only in configurations that include the 4LFF mid tray kit together with processors of 126W and above. In other builds, follow the slot order in the server documentation and balance modules evenly across both processors.

New P07646-B21 Kits

Pick New for unused modules. The warranty and packaging details for this option are shown on the page.

Refurbished P07646-B21 Kits

Refurbished modules are pre-owned and cost less than new. Their condition notes and warranty are displayed with the option.

P07646-B21 Technical Specifications

Servers That Support P07646-B21

• HPE ProLiant DL385 Gen10 Plus (in HPE QuickSpecs)
• HPE ProLiant DL325 Gen10 Plus and DL365 Gen10 Plus
• HPE ProLiant DL385 Gen10 Plus v2 and DL325 Gen10 Plus v2
• HPE ProLiant DL345 Gen10 Plus

Apart from the DL385 Gen10 Plus, these models come from spares cross-references, so check the QuickSpecs for your exact server.

Related Parts For AMD And Intel Gen10 Plus

• Need a smaller module of the same type? See the HPE P07640-B21 16GB single rank x4 kit.
• Servers already fitted with x8 memory may need the refurbished HPE P07642-B21 16GB x8 module.
• For 64GB per slot, look at HPE P20504-001 64GB DDR4-3200 memory.
• Running an Intel DL380 Gen10 Plus? The HPE P06033-B21 32GB Intel kit is the one to order.
• Find CPUs in our server processor kits.
• Mounting a new server? See our server rail kits.

How To Check The Part

• The DIMM label should read 32GB 2Rx4 PC4-3200AA-R.
• Look for P07646-B21, P20503-001 or P11444-191 on the label or parts list.
• Confirm your server uses AMD EPYC processors, not Intel Xeon.
• Check that no x8 modules or LRDIMMs are installed.

Buying P07646-B21 in the UK

Euroland IT Store ships HPE memory across the UK, with delivery options shown at checkout. To confirm whether you need the AMD or Intel 32GB kit, send us your server model, serial number and the details on an existing DIMM label.

Frequently Asked Questions

What is the difference between P07646-B21 and P06033-B21?

Both are 32GB dual rank x4 DDR4-3200 registered kits. HPE lists P07646-B21 for AMD EPYC Gen10 Plus servers and P06033-B21 for Intel Gen10 Plus servers, with different spare and assembly numbers.

What is the HPE spare number for P07646-B21?

The service spare for this kit is P20503-001. Spares references list P11444-191 as the assembly number printed on the module.

How much memory can a DL385 Gen10 Plus hold with this kit?

With 32 slots, it takes up to 1TB of P07646-B21 modules. Using one module per channel (16 modules, 512GB) keeps memory at 3200 MT/s.

Where can I see the warranty on this kit?

Select New or Refurbished on the product page. The warranty for that condition is shown with the option.

Do you offer UK delivery for P07646-B21?

Yes. UK delivery is available, and the shipping options are listed at checkout.