EPYC 7543 vs EPYC 9554
The EPYC 7543 and the EPYC 9554 are both server processors we supply tested from Hong Kong, and the figures below are the same ones published on each product page. They share the same supply and warranty terms and separate on cores / threads, socket, tdp, so the decision is less about "which is better" and more about which of those differences your platform or workload can actually use.
Nothing on this page is a price: component pricing moved too fast in 2026 for a printed figure to stay honest, so both are quoted on request against confirmed stock with the date the quote holds until. If you are replacing a part, send the platform and we will confirm the population before you commit.
Side by side
EPYC 7543 vs EPYC 9554 specifications
| Specification | EPYC 7543 | EPYC 9554 |
|---|---|---|
| Cores / Threads | 32 cores / 64 threads | 64 cores / 128 threads |
| Socket | SP3 (LGA 4094) | SP5 (LGA 6096), 2P-capable |
| TDP | 225W (configurable 200–240W) | 360W (configurable 320–400W) |
| Cache | 256MB L3 + 32MB L2 | 256MB L3 + 64MB L2 |
| Memory | 8-channel DDR4-3200 | 12-channel DDR5-4800 |
| PCIe | PCIe Gen4, 128 lanes | PCIe Gen5, 128 lanes |
| Processor | AMD EPYC 7543 (Milan) | AMD EPYC 9554 (Genoa), OPN 100-000000790 |
| Clock | 2.8GHz base / 3.7GHz max boost | 3.1GHz base / 3.75GHz max boost |
Rows that differ are highlighted. Figures are the same ones published on each product page; where a figure is community-sourced rather than vendor-published it is stated on that page. Confirm every part against your build sheet when ordering.
Where they differ
- ·EPYC 9554 has the higher core count (64 vs 32); EPYC 7543 trades that for something else.
- ·Socket — EPYC 7543: SP3 (LGA 4094); EPYC 9554: SP5 (LGA 6096), 2P-capable.
- ·EPYC 7543 is the better figure for power draw (225W (configurable 200–240W) vs 360W (configurable 320–400W)).
- ·Cache — EPYC 7543: 256MB L3 + 32MB L2; EPYC 9554: 256MB L3 + 64MB L2.
- ·Memory — EPYC 7543: 8-channel DDR4-3200; EPYC 9554: 12-channel DDR5-4800.
- ·PCIe — EPYC 7543: PCIe Gen4, 128 lanes; EPYC 9554: PCIe Gen5, 128 lanes.
- ·EPYC 9554 lists the higher base clock (3.1GHz base / 3.75GHz max boost vs 2.8GHz base / 3.7GHz max boost).
Decision
Which one to buy
For processors the useful split is throughput versus frequency. More cores per socket wins on virtualisation density, parallel batch work and multi-tenant hosting, where the scheduler can keep every core busy; higher base and boost clocks win where the workload is latency-sensitive or licensed per core, and the extra cores would sit idle. Check the socket and the platform's memory generation before anything else: a CPU is only useful in a board that takes it, and the two models above are interchangeable only when the socket matches. TDP also sets the cooling and power budget per node.
Choose the EPYC 7543 if
- ·Socket: SP3 (LGA 4094)
- ·You need lower power draw — the EPYC 7543 lists 225W (configurable 200–240W) against 360W (configurable 320–400W) on the EPYC 9554.
- ·Memory: 8-channel DDR4-3200
Choose the EPYC 9554 if
- ·You need more core count — the EPYC 9554 lists 64 cores / 128 threads against 32 cores / 64 threads on the EPYC 7543.
- ·Socket: SP5 (LGA 6096), 2P-capable
- ·Memory: 12-channel DDR5-4800
Photos
What the two look like
EPYC 7543
Photo from the EPYC 7543 page. Every unit's label is read against your order before dispatch.
EPYC 9554
Photo from the EPYC 9554 page. Every unit's label is read against your order before dispatch.
Frequently asked questions
How much do the EPYC 7543 and the EPYC 9554 cost?
We do not publish prices for either: DRAM and CPU pricing moved too fast in 2026 for a printed figure to stay honest. Send the quantity, the platform and the condition you want and we quote both against confirmed stock, with the date the figure holds until.
What is the main difference between the EPYC 7543 and the EPYC 9554?
Cores / Threads (EPYC 7543: 32 cores / 64 threads; EPYC 9554: 64 cores / 128 threads); Socket (EPYC 7543: SP3 (LGA 4094); EPYC 9554: SP5 (LGA 6096), 2P-capable); TDP (EPYC 7543: 225W (configurable 200–240W); EPYC 9554: 360W (configurable 320–400W)).
Can I use the EPYC 7543 and the EPYC 9554 in the same system?
No. They use different sockets (SP3 (LGA 4094) vs SP5 (LGA 6096), 2P-capable), so they need different server platforms and cannot share a board.
Which one should I buy?
Buy the one whose strong points match the job: see the "Choose" section above. If you are replacing an existing part, send the platform or the old part number and we will confirm compatibility before you order.
What condition are they in, and do you ship worldwide?
Both are supplied tested with a 1-year written warranty. Condition is stated line by line before you order — new, decommissioned pull or OEM tray — and we ship worldwide from the Hong Kong warehouse with full export documentation, typically 3–7 days by air.
Get a quote for either — or both
Tell us the quantity, the platform and the condition you need. We confirm stock and put a firm figure in writing with the date it holds until.
Request a Quote