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Possibly, but it is an unofficial, adapter-specific workaround—not a storage upgrade documented by HP. HP lists an MXM graphics connector and a separate mSATA connector in the EliteDesk 800 G1 USDT. One owner reported using an MXM-to-NVMe adapter successfully, but that report does not establish universal compatibility or reliable boot support.
What storage connectors does the 800 G1 USDT have?
HP’s EliteDesk 800 G1 QuickSpecs, North America Version 20, dated February 18, 2014, list an internal mSATA connector, a PCI Express mini-card connector, an MXM graphics connector and a 2.5-inch internal storage bay. HP’s QuickSpecs and Hardware Reference Guide describe separate roles for the mSATA and MXM connections: storage and graphics, respectively.
The USDT specifications reviewed do not list a native M.2 storage connector. Do not confuse this model with the 800 G1 Desktop Mini (DM): HP lists an M.2-2280 storage connector for the DM, not the USDT. The two chassis have different connector layouts; details about the DM do not establish what fits the USDT.
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Can an MXM connector be used for NVMe storage?
HP documents MXM as a graphics connection, not as an NVMe storage interface or supported SSD upgrade. A Reddit user reported using an MXM-to-NVMe adapter in an 800 G1 USDT and described the connection as PCIe x4-class. That is an individual result, not a manufacturer compatibility guarantee or a measured speed result. The report does not establish that other adapter designs, drives or system configurations will work.
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Before buying an MXM-to-M.2 NVMe adapter, verify that its interface is intended for the USDT’s MXM connector, that its dimensions and the SSD will physically fit, and that it supports the NVMe drive you plan to use. The available documentation and owner report do not establish clearance, cooling, detection or boot behavior across configurations. Treat the possibility that an installed drive may not boot as a real risk, not a certainty.
How do the USDT’s SSD upgrade options compare?
| Option | What is established | Important limitation |
|---|---|---|
| MXM-to-NVMe adapter and M.2 NVMe SSD | The USDT has an MXM graphics connector; one owner reported using an adapter and NVMe SSD. | Unofficial and adapter-specific. Broad compatibility, physical fit, drive recognition and boot support are not established. |
| mSATA SSD | HP documents a USDT mSATA connector for an ultra-small SSD. | mSATA is not M.2 NVMe. Confirm the drive’s interface and size before purchasing. |
| 2.5-inch SATA SSD | HP lists a 2.5-inch internal storage bay. | Check the particular unit’s existing drive, caddy and cabling before buying parts or planning installation. |
If you want to use the MXM method, assess connector compatibility and clearance before comparing SSDs. If you prefer storage connections HP documents for this chassis, consider an mSATA SSD for the 800 G1 USDT or a 2.5-inch SATA SSD, after checking the drive and bay details on your unit. No success rate, speed gain or universal boot result is established for the MXM-to-NVMe method.
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Does the Desktop Mini’s M.2 slot apply to the USDT?
No. HP’s QuickSpecs list M.2-2280 storage for the Desktop Mini variant, while the USDT overview lists mSATA, MXM and a 2.5-inch bay. A 2022 HP Support Community discussion includes Desktop Mini M.2 details; those details should not be used to infer that the USDT has the same slot.
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