Our take
HP's M651 series table maps product number CZ256A to the exact M651dn, distinct from the M651n and M651xh configurations. HP documents color laser printing up to 45 pages per minute, automatic duplex, Gigabit Ethernet, a 100-sheet multipurpose tray and a 500-sheet main tray. Its recommended monthly range is 2,000 to 17,000 pages. The available source packet does not establish built-in wireless, so this review does not claim it. Buyers should assess the exact suffix and condition of any legacy unit before comparing its office capacity with a current printer.
A wired workgroup that prints color at a sustained office pace and can inspect an older enterprise printer before purchase..
Skip this model if you need copy, scan or fax functions, a compact personal device, or a current unit whose service and parts status is already established.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- HP maps CZ256A to M651dn and rates the exact model up to 45 ppm in color.
- Automatic duplex and 600 sheets of standard input reduce manual handling on recurring jobs.
- The 2,000–17,000 page recommended range supports an office workload comparison.
What to weigh up
- It is print-only and cannot replace a copier, scanner or fax device.
- The exact source packet does not establish built-in wireless networking.
- A historical model specification cannot confirm the condition or service history of a used unit.
Specifications and exact model details
The key details
| Model covered | M651dn |
|---|---|
| Main functions | Color print only |
| Print output | Color laser; rated up to 45 ppm |
| Two-sided printing | Automatic duplex; 100-sheet multipurpose tray plus 500-sheet tray |
Performance figures are manufacturer claims. Source checked October 15, 2026. Regional models and included accessories can differ.
Full review: how the features affect your choice
What the features mean for you
The dn suffix identifies a specific enterprise configuration
HP's U.S. series table maps the CZ256A product number to M651dn and separates it from the M651n and M651xh. That distinction matters when a listing uses a broad M651 family title: tray and duplex details should follow the exact dn version rather than another suffix. The M651dn is a dedicated color printer, so teams that need only printing can use its role directly. If a group expects scanning or fax, those needs require separate hardware because this model does not provide those functions ([HP M651 series specifications](https://support.hp.com/us-en/document/c04249166)).
Rated speed is suited to a busy queue
HP rates the M651dn up to 45 pages per minute and gives a 2,000 to 17,000 page recommended monthly range. Those facts place it in a substantially different work profile from a small desk printer with a few hundred pages of routine use. A shared office can compare its expected color and black print volume with the recommendation rather than treating the maximum duty figure as a target. Rated speed remains a manufacturer figure; mixed graphics, media and individual machine condition can change real job timing ([HP M651dn specifications](https://support.hp.com/us-en/product/product-specs/hp-color-laserjet-enterprise-m651-series/model/5391214)).
Automatic duplex is built into the documented configuration
HP lists automatic two-sided printing for the M651dn. For recurring reports, forms or internal packets, an automatic path avoids the operator having to turn a stack and reload it for the second pass. This is a print-side feature and does not establish duplex scanning or any copy function. The value of the duplexer depends on the media and job size; offices that use specialty stock should confirm the supported paper settings in HP's guide before planning all work around two-sided output.
The standard trays support longer runs between refills
HP documents a 100-sheet multipurpose tray alongside a 500-sheet main tray. Together they provide 600 sheets of standard input and can keep the main office stock separate from a smaller alternate feed. That capacity is useful when several people share a queue, but it is not proof that optional trays are included in a marketplace offer. Confirm the base M651dn and any extra feeder by part number on the actual machine. A used printer's pickup rollers and tray condition also cannot be judged from the original capacity table.
Plan the network around the documented wired connection
HP documents Gigabit Ethernet for the M651dn. That can work for a fixed office installation with a network drop and a managed print queue. The source packet used for this exact model does not establish built-in wireless, so a buyer who requires Wi-Fi should not infer it from another M651 suffix or a generic family listing. Check the M651dn nameplate and the installed network interface on the unit being offered, especially if the seller describes several configuration codes in one listing.
A legacy enterprise unit needs a unit-level inspection
HP's specifications describe the design, not the remaining life of an individual used printer. Before choosing an M651dn, confirm the exact product number, power configuration, installed trays and duplex path, then ask about page count, maintenance parts, supplies and return conditions. The exact-model Amazon search link is not proof of a particular seller or current offer. This extra checking matters because a fast office specification has little practical value if a used unit is incomplete or does not fit the office's network and maintenance plan.
Compare for your needs
For an all-in-one compare the HP M476dn or Canon MF8050Cn; for a lighter color print queue compare the wireless Canon LBP654Cdw.
Find the undefined that fits you.
Tell us what matters. We’ll help you weigh the options.
Before you buy
Does the M651dn print automatically on both sides?
Yes. HP lists automatic duplex printing for the exact M651dn configuration.
How much paper is in the standard input?
HP lists a 100-sheet multipurpose tray and a 500-sheet main tray, for 600 sheets total.
Can this printer scan or fax?
No. The M651dn is a color print-only model; the reviewed HP source does not assign it copy, scan or fax functions.
What monthly volume does HP recommend?
HP's M651dn specifications give a recommended monthly range of 2,000 to 17,000 pages.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources and review basis
Sources & review basis
We use the linked product documentation for the features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- HP Color LaserJet Enterprise M651 series specifications and variant table ↗ — checked October 15, 2026.
- HP U.S. M651 series table mapping product number CZ256A to M651dn and distinguishing family variants ↗ — checked October 15, 2026.
- HP M651dn speed, automatic duplex, tray and recommended monthly volume specifications ↗ — checked October 15, 2026.
The decision
The M651dn is a wired enterprise color printer for a substantial recurring queue, provided its exact legacy configuration and condition check out.
Is it the right fit?
Check the exact model and today’s offers on Amazon.