P73355-B21: HPE EPYC 9745 2.4GHz 128 Core Socket SP5 Server CPU
MPN: P73355-B21|By: HPE

Price
Quoted on request
Current pricing within 48 business hours.
In Stockships worldwide
Key specs
- Processor Family
- EPYC 9745
- Core Count
- 128
- Clock Speed
- 2.4GHz
- CPU Socket
- Socket SP5
- Condition:
- New (authorized channel)
- Warranty:
- Full manufacturer warranty
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Bulk order? Request volume pricing
Authorized & warrantied
Sourced through authorized distribution, with the full manufacturer warranty.
Compatibility checked
Validated against your server platform before dispatch.
Delivery & lead time
Confirmed with your quote, including expedited freight where available.
Business & public sector
POs, net terms and volume pricing for qualified organizations, government and edu.
Product overview
HPE lists P73355-B21 as an EPYC 9745 2.4GHz 128 Core socket SP5 Server CPU. A processor upgrade is constrained by socket, chipset and BIOS revision, and a mismatched stepping will not post. This part is 128-core. We check the platform's supported-CPU list against your service tag before quoting.
Ask for the datasheet and firmware notes with the quote; we would rather you check our claim than take it.
Specifications
General
- Manufacturer part number
- P73355-B21
- Processor Family
- EPYC 9745
- Product Type
- Server Processors
- Manufacturer
- HPE
Technical specifications
- Core Count
- 128
- Clock Speed
- 2.4GHz
Interfaces & connectivity
- CPU Socket
- Socket SP5
Specifications for P73355-B21 as published by HPE. Where a value is absent it is because we could not verify it, not because it does not exist. Ask and we will check.
Where the HPE P73355-B21 is deployed
- Like-for-like replacement of P73355-B21 in an existing system
- Populating the second socket on a single-CPU server
- Consolidating licensed workloads onto fewer, larger cores
Who this part is for
- Integrators building to a specified CPU model and stepping
- Procurement sourcing a like-for-like CPU replacement under fault
- Engineers matching a second socket to the processor already fitted
What you get ordering this from us
Ordered by part number
P73355-B21 is what is quoted and P73355-B21 is what ships; where an alternate code is genuinely the same part we name it rather than swap it silently.
Volume pricing
The listed price is per unit; tiered pricing applies at quantity and purchase orders are accepted.
BIOS revision checked
We confirm the firmware level the platform needs to recognise this processor, because a chip the BIOS does not know will not post.
Questions buyers ask about this part
Is P73355-B21 genuine and is the warranty intact?
Yes. Supplied new and unopened, so the manufacturer warranty and firmware update path stay supported. No grey-market stock and no refurbished units sold as new.
Will P73355-B21 work in my server?
Send the service tag. We check the platform's supported-CPU list and the BIOS revision it requires, and where the board is dual-socket we confirm what is in the other socket. A stepping the firmware does not recognise will not post.
Do you accept purchase orders and quote at volume?
Yes. Purchase orders are accepted from qualified organisations, net terms are available on approval, and tiered pricing applies at quantity. Tell us how many you need.
Compare other Server Processors we stock
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|---|---|---|---|---|
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| Dell Xeon Silver 4310 12-Core Processor Kit with Heatsink for PowerEdge Servers | Dell Technologies | Cores / Threads: 12C / 24T | In Stock | $545 |
| HP Xeon E5-2620 v2 6-Core Processor Kit with Heatsink for ProLiant Gen8 Servers | HP | Cores / Threads: 6C / 12T | In Stock | $55 |
| Lenovo ThinkSystem Xeon Silver 4310 12-Core Processor Option Kit with Heatsink | Lenovo | Cores / Threads: 12C / 24T | In Stock | $540 |
| Noctua NH-U14S TR5-SP6 140mm CPU Cooler | Noctua | CPU Socket: SP6 | In Stock | Request quote |
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Specifying a system, not just the part?
On a training or inference node the host CPU is sized around the accelerators it feeds, not chosen on its own.
