AMD Ryzen 9 PRO 5945 socket: AM4
The AMD Ryzen 9 PRO 5945 uses AM4, the PGA socket for Ryzen desktop processors. The 12-core chip at 65 W needs a desktop board with DDR4 memory and a graphics card.
- Socket
- AM4
- Launched
- April 2022
- Cores and threads
- 12 and 24
- Default TDP
- 65 W
- Codename
- Vermeer
- Segment
- Desktop
- Family
- AMD Ryzen 9
- Clocks
- 3.0 / 4.7 GHz
AMD Ryzen 9 PRO 5945 specifications
| Cores | 12 |
|---|---|
| Threads | 24 |
| Core architecture | Zen 3 (Vermeer) |
| Clocks | 3.0 GHz base, up to 4.7 GHz boost |
| Cache | 64 MB L3 and 6 MB L2 |
| Default TDP | 65 W |
| Manufacturing process | TSMC 7 nm FinFET |
| Memory support | DDR4 up to 3200 MT/s, two channels |
| PCI Express | PCIe 4.0 |
| Integrated graphics | None. A graphics card is required |
| ECC memory | Yes |
| Package | AM4 (PGA1331) |
| Cooler in the box | None (OEM tray, cooler supplied with system) |
Motherboard and chipset compatibility
AMD Ryzen 9 PRO 5945 needs a motherboard with a AM4 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 500 series | X570, B550, A520 | Works out of the box Boards sold before Ryzen 5000 launched in late 2020 may need a BIOS update first. |
| 400 series | X470, B450 | Needs a BIOS update Needs a BIOS update with AMD's Ryzen 5000 support. The board maker's CPU support list is the deciding source. |
| 300 series | X370, B350, A320 | Needs a BIOS update AMD allowed Ryzen 5000 on 300 series boards from 2022, but each board maker decides whether to release the BIOS, and not every board received it. |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for AM4.
AM4 at a glance
| Type | PGA, 1,331 contacts |
|---|---|
| Package size | 40 × 40 mm |
| Introduced | 2016 |
| Memory | DDR4 only |
| Cooler mounting holes | 54 × 90 mm |
What the Ryzen 9 PRO 5945 is
The AMD Ryzen 9 PRO 5945 is the 12-core PRO member of the Ryzen 5000 desktop family for AM4 boards from April 2022. 12 cores with simultaneous multithreading give 12 cores and 24 threads, with base at 3.0 GHz and up to 4.7 GHz boost. The package carries 64 MB of L3 plus 6 MB of L2. The 65 W envelope fits standard desktop cooling with a graphics card, since this PRO chip carries no integrated graphics.
Performance lands near the consumer Vermeer counterpart at the same core count, with clocks set for office fleets rather than tuning. Memory stays with DDR4, so existing AM4 boards carry the part after a BIOS update. AMD sells the part through business channels with PRO manageability and security features.
Business fleets take this 12-core PRO part with manageability features for managed desktops, where thread count grows without leaving the 65 W envelope. The Socket vs chipset: what decides whether a CPU works guide covers AM4 board choice, and AMD Ryzen 3 PRO 4355G shows a nearby PRO option on the same socket.
Socket and motherboard compatibility
The 5945 fits AM4 on desktop boards with AM4 retention and desktop power delivery. Vermeer works natively on 500 series chipsets and after a BIOS update on 400 and 300 series boards that list Vermeer PRO support. Board lists must name the PRO part, since business BIOS revisions lag consumer releases.
Chipset choice decides USB, SATA and slot breadth rather than CPU fit. A 500 series board is the natural match for a new build, while a 400 series board needs a confirmed BIOS revision before the swap. Check the board CPU list for the exact PRO model before buying.
Memory, PCIe and cooling
DDR4 up to 3200 MT/s, two channels with ECC feed the cores for office workloads, and matched DIMMs hold the rated speed. Capacity follows the board with four DIMM slots on most ATX designs, and two matched kits fill the board for full population. ECC operation needs a board firmware that enables it, which suits managed fleets that standardize on error correcting memory.
PCIe 4.0 from the CPU wires a graphics card and NVMe storage, which matters more here than on APUs because every display needs the discrete card. Lane splits follow board firmware, so slot population rules come from the board manual.
Cooling is a 65 W desktop heatsink with standard AM4 mounting. Tray parts ship without a cooler, so the system or a retail AM4 cooler covers the load with headroom for boost.
Upgrade paths
On AM4 the upward moves are higher core parts where thread counts grow, up to 12 and 16-core Vermeer chips on boards with the power delivery for them. For this 12-core PRO SKU, memory growth and a faster graphics card often help more than clocks. Boards with spare DIMM slots take the upgrade without touching the CPU, and storage moves to NVMe where the board offers the slot.
Outside this SKU, AMD Ryzen 3 PRO 4355G (Ryzen 3 PRO 4355G) on AM4 adds cores for denser work. Display count follows the graphics card outputs, since every port hangs off the discrete card. A move to AM5 needs a new board with DDR5, so socket local growth comes first.
Frequently asked questions
What socket does the Ryzen 9 PRO 5945 use?
AM4 on desktop boards with the PRO part on the CPU support list.
Does the Ryzen 9 PRO 5945 have integrated graphics?
No, a graphics card is required for any display.
What memory does the Ryzen 9 PRO 5945 need?
DDR4 up to 3200 MT/s, two channels.
What does PRO add over the consumer version?
PRO manageability with remote management, PRO Security and a business support channel for fleets, as AMD defines the PRO feature set, which keeps fleet images on one baseline.
Is the Ryzen 9 PRO 5945 sold at retail?
No, it ships through business channels, so tray pulls carry no boxed cooler. System builders add their own AM4 cooler rated for the TDP.
Sources and verification
Facts last checked against these sources on . Page last edited on .