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HP t640vsHP Elite t655

HP t640 vs t655 Thin Client

The HP t640 built one of the largest installed bases in modern thin client history, and plenty of fleets are still running units well past their original refresh cycle. HP has since moved the mainstream Elite thin client line forward to the t655, built on newer AMD Ryzen embedded silicon with current OS support. If you are staring down a t640 refresh, here is what actually changed and what it means for your environment.

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Side by side

FeatureHP t640HP Elite t655
Where it sits in the lineupPrevious-generation mainstream Elite thin client, widely deployed from 2020 onwardCurrent-generation successor built on newer AMD Ryzen embedded silicon
Operating system supportShipped in the Windows 10 IoT era, alongside HP ThinProCarries current Windows 11 IoT Enterprise support, alongside current HP ThinPro
Security & manageability baselineReflects its original release-era management and security feature setCarries HP's current management and security baseline for the Elite thin client line
TAA complianceTAA status depends on the original build and configuration that was orderedTAA-compliant configurations available
New-unit availabilityEnd-of-sale; no longer sold new by HP, so availability is secondary or refurbished market onlyOrderable new, with current production availability
Warranty on a newly acquired unitUnits sourced on the secondary market typically do not carry a fresh HP factory warrantyShips with standard new-unit HP warranty coverage
Lifecycle runwayNearing or past the end of its practical support windowFull lifecycle runway ahead as the current mainstream model
Configuration headroomFixed to whatever configuration was originally orderedConfiguration options vary by build — we confirm per quote

Our verdict

If your t640 fleet is running fine today, there is no need to panic-swap healthy units — the case for replacement is warranty, OS support and parts availability, not performance anxiety. For new deployments, VDI expansions or units that are failing, standardize on the t655, or step up to the newer t660 for higher-demand seats. We quote every current HP thin client and can price a phased fleet upgrade so you are not replacing every unit on the same day.

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Frequently asked

Is the HP t640 discontinued?
Yes. The t640 is end-of-sale from HP, so new units are no longer available through normal ordering channels. What remains is the secondary and refurbished market, and units sourced that way typically do not carry a fresh HP factory warranty. If your t640s are still working, that is not an emergency by itself, but it does mean any unit that fails becomes a replacement decision rather than a warranty claim.
Can the t655 replace t640s in an existing VDI environment?
Yes. The t655 is part of the same Elite thin client management family as the t640, so it drops into most existing VDI environments without a redesign. We still confirm your specific image, connection broker and peripheral requirements per deployment before a rollout, since those details vary by environment.
What about the t660?
The t660 sits above the t655 as HP's higher-performance thin client tier, aimed at heavier VDI workloads and users who need more headroom than the t655 provides. We stock the t660 as well, so if your t640 refresh includes a mix of standard and higher-demand seats, we can quote a combined t655 and t660 fleet.

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