P49638-B21 — HPE Xeon Gold 6438N 2GHz 32 Core FCLGA4677 Server CPU
MPN: P49638-B21|By: HPE

In Stockships worldwide
- Condition:
- New — authorized channel
- Warranty:
- Full manufacturer warranty
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Product overview
P49638-B21 is an HPE Xeon Gold 6438N 2GHz 32 Core FCLGA4677 Server CPU. In a dual-socket board both sockets have to carry the same model, and the BIOS has to be new enough to recognise it. This is the 32-core part. Send the service tag and we will confirm the firmware revision as well as the chip.
If the part is wrong for your platform we will say so and suggest the one that is, which is cheaper for both of us than a return.
Featuring
- Core Count
- 32
- Processor Family
- Xeon Gold
- Manufacturer
- HPE
Interfaces / Ports
- CPU Socket
- FCLGA4677
Physical characteristics
- Product Type
- Server Processors
- Expedited shipping options are available — rates confirmed with your quote.
- Purchase orders accepted from qualified institutions.
- Compatibility is validated against your server platform before dispatch. Send us the model and we will confirm support.
These are the 5 facts we can state about P49638-B21 without inferring anything. Compatibility beyond this is confirmed per platform, on request, before you order.
Where the HPE P49638-B21 is deployed
- Sourcing P49638-B21 against a build sheet that names it explicitly
- Consolidating licensed workloads onto fewer, larger cores
- Upgrading compute in place rather than replacing the chassis
Who this part is for
- Engineers matching a second socket to the processor already fitted
- Integrators building to a specified CPU model and stepping
- Teams upgrading compute inside an existing chassis rather than replacing it
What you get ordering this from us
Ordered by part number
P49638-B21 is what is quoted and P49638-B21 is what ships; where an alternate code is genuinely the same part we name it rather than swap it silently.
Answered by a human
A quote comes back with the reasoning attached, including the cases where we think you should buy something else.
No substitutions without asking
If we cannot supply the exact code we tell you what we can supply and why, rather than shipping an equivalent and letting you find out.
Questions buyers ask about this part
- Is P49638-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 P49638-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. We quote against a purchase order and hold the price for the quote period, with tiered rates at quantity. Net terms are available once the account is approved.
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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.
