Consumercarts is reader-supported. Learn more
AMD EPYC Embedded 740P vs AMD EPYC Embedded 7643: Comparison
What is the difference between EPYC Embedded 740P and EPYC Embedded 7643?
The gap that matters here is l3 cache: EPYC Embedded 740P 64 MB against EPYC Embedded 7643 256 MB, which puts EPYC Embedded 7643 75% ahead. There is a split on thread count as well, 48 threads on the EPYC Embedded 740P versus 96 threads on the EPYC Embedded 7643. Core architecture is not the same on both, Zen on the EPYC Embedded 740P versus Zen 3 on the EPYC Embedded 7643. They differ on base clock too, 2 GHz on the EPYC Embedded 740P versus 2.3 GHz on the EPYC Embedded 7643. There is a split on memory type as well, DDR4-2667 on the EPYC Embedded 740P versus DDR4-3200 on the EPYC Embedded 7643. There is a split on usb as well, 4x USB 3.1 Gen1 on the EPYC Embedded 740P versus 4x USB 3.0 Gen1 on the EPYC Embedded 7643.
Which should you buy, EPYC Embedded 740P or EPYC Embedded 7643?
The EPYC Embedded 740P suits industrial and embedded system designs and long-lifecycle networking and edge-compute deployments, though it is not built for consumer desktop or gaming builds and DIY PC upgrades. Buy the EPYC Embedded 7643 for industrial and embedded system designs and long-lifecycle networking and edge-compute deployments, though it is not the pick for consumer desktop or gaming builds and DIY PC upgrades.
Where the two are identical
The common ground is wider than the gap: pcie lanes, socket, security processor, memory controller and sata are identical here. They match on 1 further specification as well.
Frequently asked questions
Do the EPYC Embedded 740P and EPYC Embedded 7643 differ on boost clock?
Yes. Boost Clock reads 3 GHz on the EPYC Embedded 740P versus 3.6 GHz on the EPYC Embedded 7643.
Is the Low Speed Interfaces the same on the EPYC Embedded 740P and EPYC Embedded 7643?
It is. Both are listed at GPIO , I2C , LPC , SMBus , SPI..., so it is not a reason to pick one over the other.
Specs and benchmarks
Core Count
- AMD EPYC Embedded 740P
- 24 cores
- AMD EPYC Embedded 7643
- 48 cores
Thread Count
- AMD EPYC Embedded 740P
- 48 threads
- AMD EPYC Embedded 7643
- 96 threads
Core Architecture
- AMD EPYC Embedded 740P
- Zen
- AMD EPYC Embedded 7643
- Zen 3
Base Clock
- AMD EPYC Embedded 740P
- 2 GHz
- AMD EPYC Embedded 7643
- 2.3 GHz
Boost Clock
- AMD EPYC Embedded 740P
- 3 GHz
- AMD EPYC Embedded 7643
- 3.6 GHz
L3 Cache
- AMD EPYC Embedded 740P
- 64 MB-75%
- AMD EPYC Embedded 7643
- 256 MBBest
Socket
- AMD EPYC Embedded 740P
- SP3
- AMD EPYC Embedded 7643
- SP3
Memory Type
- AMD EPYC Embedded 740P
- DDR4-2667
- AMD EPYC Embedded 7643
- DDR4-3200
PCIe Lanes
- AMD EPYC Embedded 740P
- 128 lanes
- AMD EPYC Embedded 7643
- 128 lanes
TDP
- AMD EPYC Embedded 740P
- 155 W
- AMD EPYC Embedded 7643
- 225 W
Security Processor
- AMD EPYC Embedded 740P
- Yes
- AMD EPYC Embedded 7643
- Yes
Memory Controller
- AMD EPYC Embedded 740P
- 8 Channel w/ECC
- AMD EPYC Embedded 7643
- 8 Channel w/ECC
USB
- AMD EPYC Embedded 740P
- 4x USB 3.1 Gen1
- AMD EPYC Embedded 7643
- 4x USB 3.0 Gen1
SATA
- AMD EPYC Embedded 740P
- 32
- AMD EPYC Embedded 7643
- 32
Low Speed Interfaces
- AMD EPYC Embedded 740P
- GPIO , I2C , LPC , SMBus , SPI , UART
- AMD EPYC Embedded 7643
- GPIO , I2C , LPC , SMBus , SPI , UART
Which one should you pick?
Choose 740P if you want the higher PCIe lanes (128 lanes vs 128 lanes) and the higher SATA (32 vs 32).
Choose 7643 if you want the higher L3 cache (256 MB vs 64 MB).