AMD Ryzen 9 PRO 7945 socket: AM5
The AMD Ryzen 9 PRO 7945 uses AM5, the LGA socket for Raphael desktop processors with DDR5 and 28 PCIe Gen5 lanes. The 12-core PRO chip at 65 W suits business workstations with 600 and 800 series chipsets.
- Socket
- AM5
- Launched
- June 13, 2023
- Cores and threads
- 12 and 24
- Default TDP
- 65 W
- Codename
- Raphael
- Segment
- Desktop
- Family
- AMD Ryzen 9 PRO
- Clocks
- 3.7 / 5.4 GHz
AMD Ryzen 9 PRO 7945 specifications
| Cores | 12 |
|---|---|
| Threads | 24 (SMT) |
| Core architecture | Zen 4 |
| Clocks | 3.7 GHz base, up to 5.4 GHz boost |
| Cache | 64 MB L3 |
| Default TDP | 65 W |
| Manufacturing process | TSMC 5 nm FinFET (compute), 6 nm (I/O die) |
| Memory support | DDR5, 2 channels |
| PCI Express | PCIe 5.0 x28 (24 usable lanes) |
| Integrated graphics | AMD Radeon Graphics, 2 CUs |
| Multiplier | Locked (PRO, no PBO) |
| ECC memory | Yes (requires board support) |
| Package | AM5 (LGA1718) |
Motherboard and chipset compatibility
AMD Ryzen 9 PRO 7945 needs a motherboard with a AM5 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 800 series | X870E, X870, B850, B840 | Works out of the box |
| 600 series | X670E, X670, B650E, B650, A620 | Works out of the box |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for AM5.
AM5 at a glance
| Type | LGA, 1,718 contacts |
|---|---|
| Package size | 40 × 40 mm |
| Introduced | September 2022 |
| Memory | DDR5 only (AMD EXPO profiles for faster kits) |
| Cooler mounting holes | 54 × 90 mm |
What the Ryzen 9 PRO 7945 is
The Ryzen 9 PRO 7945 is a 12-core and 24-thread desktop processor in the Ryzen PRO 7000 family for business workstations. Twelve Zen 4 cores with simultaneous multithreading run at 3.7 GHz base and up to 5.4 GHz boost, with 64 MB of L3 per AMD PRO desktop materials. Default TDP is 65 W with PRO security for fleets. The two-CCD layout shares the Raphael AM5 platform with consumer 7900-class silicon.
Radeon Graphics with 2 compute units cover office displays without a discrete card. DDR5 in two channels with ECC on capable boards feeds 12 cores. PCIe 5.0 lanes serve NVMe and discrete GPUs where needed.
Business workstations with parallel builds fit here. Twelve cores keep compiles plus security agents together at 65 W. Buyers who need only office pace should save with 6-core PRO instead, since this 7945 charges for threads.
Socket and motherboard compatibility
The PRO 7945 fits AM5 on 600 and 800 series boards with Raphael PRO support. A620, B650, B650E, X670, X670E plus 800 series list the family. The LGA1718 package uses standard AM5 coolers.
Memory is DDR5 in two channels with ECC on capable boards. PRO fleets favor error coverage for long jobs. Board support lists decide exact kits.
Business shoppers compare PRO 12-core against 8-core twins on threads. The 7945 leads on parallel loads. The Socket vs chipset: what decides whether a CPU works guide covers AM5 updates.
Memory, PCIe and cooling
DDR5 in dual channels is the PRO standard. Builds benefit from 32 GB or more. Dual modules are preferred.
PCIe 5.0 lanes serve GPU plus NVMe. PRO builds pair integrated graphics with one fast SSD.
Cooling is 65 W boxed class. Towers cut noise. Airflow decides repeat 5.4 GHz behavior.
Upgrade paths
The AM5 socket allows moves within Raphael PRO on the same board. Memory and NVMe can also grow. BIOS must list the target.
A working PRO 7945 lasts workstation years. Granite Ridge needs only a BIOS update where listed.
Frequently asked questions
What socket does the Ryzen 9 PRO 7945 use?
It uses AM5 on 600 and 800 series boards with Raphael PRO support.
How fast is the Ryzen 9 PRO 7945?
Twelve cores and 24 threads at 3.7 GHz base and up to 5.4 GHz boost, with 64 MB of L3 at 65 W.
What memory does the PRO 7945 support?
DDR5 in two channels with ECC on capable boards.
Can the PRO 7945 be upgraded?
Yes, within Raphael PRO on the same board where BIOS allows.
Sources and verification
- AMD Ryzen PRO Desktop for Business QRG PRO 7945 12 cores 5.4GHz (AMD)
- AMD Ryzen 7 PRO 7745 Raphael AM5 specs pattern cache PCIe (AMD)
Facts last checked against these sources on . Page last edited on .