AMD Ryzen 5 PRO 7645 socket: AM5
The AMD Ryzen 5 PRO 7645 uses AM5, the LGA socket for Raphael desktop processors with DDR5 and 28 PCIe Gen5 lanes. The 6-core PRO chip at 65 W suits business desktops with 600 and 800 series chipsets.
- Socket
- AM5
- Launched
- June 13, 2023
- Cores and threads
- 6 and 12
- Default TDP
- 65 W
- Codename
- Raphael
- Segment
- Desktop
- Family
- AMD Ryzen 5 PRO
- Clocks
- 3.8 / 5.1 GHz
AMD Ryzen 5 PRO 7645 specifications
| Cores | 6 |
|---|---|
| Threads | 12 (SMT) |
| Core architecture | Zen 4 |
| Clocks | 3.8 GHz base, up to 5.1 GHz boost |
| Cache | 32 MB L3, 6 MB L2 |
| Default TDP | 65 W |
| Manufacturing process | TSMC 5 nm FinFET (compute), 6 nm (I/O die) |
| Memory support | DDR5-5200, 2 channels, up to 128 GB |
| PCI Express | PCIe 5.0 x28 (24 usable lanes) |
| Integrated graphics | AMD Radeon Graphics, 2 CUs at up to 2200 MHz |
| Multiplier | Locked (PRO, no PBO) |
| ECC memory | Yes (requires board support) |
| Package | AM5 (LGA1718) |
Motherboard and chipset compatibility
AMD Ryzen 5 PRO 7645 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 5 PRO 7645 is
The Ryzen 5 PRO 7645 is a 6-core and 12-thread desktop processor that AMD launched on June 13, 2023 for business desktops. Six Zen 4 cores with simultaneous multithreading run at 3.8 GHz base and up to 5.1 GHz boost, plus 6 MB of L2 and 32 MB of L3. The two-die design uses TSMC 5 nm for compute with a 6 nm I/O die. Default TDP is 65 W with PRO security and manageability for fleets.
Radeon Graphics with 2 compute units at up to 2200 MHz cover office displays without a discrete card. DDR5-5200 in two channels up to 128 GB with ECC on capable boards feeds 6 cores from board memory. PCIe 5.0 x28 with 24 usable lanes serves NVMe and discrete GPUs where needed.
Business offices with PRO manageability fit here. Six cores keep office suites plus security agents smooth at 65 W. Buyers who need 8 cores for heavier creation should take the AMD Ryzen 7 PRO 7745 with the same 65 W instead, since this 7645 prioritizes value over thread count.
Socket and motherboard compatibility
The PRO 7645 fits AM5 on 600 and 800 series boards with Raphael BIOS support. A620, B650, B650E, X670, X670E plus B840, B850, X870 and X870E all list the SKU where firmware is current. The LGA1718 package uses standard AM5 coolers.
Memory is DDR5-5200 in two channels up to 128 GB with ECC on capable boards. PRO fleets favor ECC for error coverage. EXPO memory overclocking is not enabled on PRO parts, so JEDEC speeds rule.
Business shoppers compare PRO 7000 parts on cores. The 7645 trails 8-core and 12-core PRO twins on parallel loads. The Socket vs chipset: what decides whether a CPU works guide covers 600 series BIOS updates for Raphael.
Memory, PCIe and cooling
DDR5-5200 in dual channels up to 128 GB is the PRO standard. Office work benefits from 32 GB where VMs stay open. Dual modules are preferred for graphics.
PCIe 5.0 x28 with 24 usable lanes serves one GPU plus NVMe. Mainstream PRO builds pair integrated graphics with one fast SSD.
Cooling is 65 W Wraith Spire class in boxed supply. Towers cut noise. Airflow decides repeat 5.1 GHz behavior.
Upgrade paths
The AM5 socket allows moves to faster Raphael PRO on the same board, such as 8-core and 12-core twins. Memory and NVMe can also grow. BIOS must list the target.
A working PRO 7645 lasts office years. A move to AM5 Granite Ridge needs only a BIOS update where the board lists Ryzen 9000.
Frequently asked questions
What socket does the Ryzen 5 PRO 7645 use?
It uses AM5 on 600 and 800 series boards with Raphael BIOS support.
How fast is the Ryzen 5 PRO 7645?
Six cores and 12 threads at 3.8 GHz base and up to 5.1 GHz boost, with 32 MB of L3 at 65 W.
What memory does the PRO 7645 support?
DDR5-5200 in two channels up to 128 GB with ECC on capable boards.
Can the PRO 7645 be upgraded?
Yes, to 8-core and 12-core Raphael PRO on the same board where BIOS allows.
Sources and verification
- AMD Ryzen 7 PRO 7745 Raphael 8 cores 65W AM5 specs pattern (AMD)
- AMD Ryzen 5 PRO 7645 Raphael 6 cores benchmarks AM5 (CPU-Monkey)
Facts last checked against these sources on . Page last edited on .