631679-B21 — HPE 1GB Flash Backed Write Cache for Smart Array
MPN: 631679-B21|By: HPE

Starting from
$75
Indicative — final pricing confirmed with your quote.
In Stockships worldwide
- Condition:
- New — authorized channel
- Warranty:
- Full manufacturer warranty
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Bulk order? Request volume pricing
Product overview
Part number 631679-B21 identifies this HPE 1GB flash backed write cache for smart array. Controller choice ties to firmware and driver support on the host, and a card that fits the slot may still be unsupported by the platform. We confirm the firmware and driver path alongside the hardware.
Send the quantity you need and we will come back within 48 business hours with availability confirmed, not estimated.
Featuring
- Capacity
- 1GB
- Compatible Platform
- Smart Array
- Manufacturer
- HPE
Physical characteristics
- Product Type
- RAID Controllers & HBAs
- 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 4 facts we can state about 631679-B21 without inferring anything. Compatibility beyond this is confirmed per platform, on request, before you order.
Where the HPE 631679-B21 is deployed
- Sourcing 631679-B21 against a build sheet that names it explicitly
- Rebuilding a host to a documented controller standard
- Replacing a failed controller without losing the array
Who this part is for
- Teams moving from RAID to a pass-through HBA for a software-defined layer
- Integrators building to a specified controller and firmware level
- Engineers adding capacity that needs more ports than the board provides
What you get ordering this from us
Ordered by part number
The order is placed against 631679-B21, not against a description of it, so there is no room for a substitution you did not agree to.
Compatibility checked
We confirm the part is supported on your platform before it ships, rather than leaving the check to you.
Answered by a human
A quote comes back with the reasoning attached, including the cases where we think you should buy something else.
Questions buyers ask about this part
- Is 631679-B21 genuine and is the warranty intact?
- Yes — new and sealed, with the HPE warranty and the firmware update path intact. We do not sell refurbished stock as new, and we do not source grey-market units.
- Will 631679-B21 work in my server?
- Send us the server model or service tag and we will confirm before you order. Part numbers alone do not always settle it — firmware revision and platform generation matter, and this is the check that prevents a return.
- 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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Most parts we ship go into a system we also build and support.
