Lexmark 78C6U & Lexmark 78C6X Toner Cartridges
Lexmark 78C6U ultra high yield and 78C6X extra high yield toner cartridges provide exceptional output capacity for Lexmark CS and CX series colour laser printers. Selecting between the 78C6X and higher-capacity 78C6U series allows busy workgroups to align replacement cycles directly with operational requirements. Our 4.8 Google Star rating shows that our customers consistently receive high-quality cartridges backed by reliable performance.
Expected page output and replacement cycles
Toner cartridge yields are measured under the ISO/IEC 19798 standard based on 5% page coverage. The 78C6X extra high yield range yields 8,500 black and 5,000 colour pages, while the 78C6U ultra high yield series expands output to 10,500 black and 7,000 colour pages for lower cost per page.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| 78C6UKE | Extra High Yield | Black | 10,500 | $0.027 |
| 78C6XKE | Extra High Yield | Black | 8,500 | $0.032 |
| 78C6UCE | Extra High Yield | Cyan | 7,000 | $0.066 |
| 78C6XCE | Extra High Yield | Cyan | 5,000 | $0.067 |
| 78C6UME | Extra High Yield | Magenta | 7,000 | $0.066 |
| 78C6XME | Extra High Yield | Magenta | 5,000 | $0.067 |
| 78C6XYE | Extra High Yield | Yellow | 5,000 | $0.067 |
| 78C6UYE | Extra High Yield | Yellow | 7,000 | $0.066 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Managing toner stock and order dispatch
If you print high volumes of monochrome text, choosing the 78C6U ultra high yield black toner delivers the lowest running costs. If you print heavy colour graphics, investing in full set 78C6X or 78C6U toner bundles ensures seamless workgroup production. Orders are dispatched quickly from distribution centres in Perth, Brisbane, Sydney, Melbourne and Adelaide. Free delivery applies on all orders over $99. If you need to check warranty terms or replacements, view our returns policy. Browse our complete range of Lexmark toner cartridges.
Pro Tip
When replacing Lexmark 78C series toner cartridges, gently rock the cartridge side-to-side horizontally before installation to evenly distribute internal toner, ensuring consistent colour density from page one.
Match Your Printing Habits to the Right Lexmark 78C6U Toner Cartridge Pack
Want longer between reorders? The 4-Pack 78C6U Genuine (from $1,260.23) gives the same full-colour coverage with a higher page yield per cartridge and also qualifies for free delivery.
If only one colour has run dry, there's no need to replace the rest - a single Genuine 78C6XKE cartridge (from $274.50) is the lowest-cost way to keep printing.
For maximum yield, the Genuine 78C6UKE Black Extra High Yield cartridge (from $283.31) offers the lowest cost per page of any option in this range and qualifies for free delivery.
Frequently Asked Questions
Can I mix 78C6X extra high yield and 78C6U ultra high yield cartridges in the same Lexmark printer?
Yes, you can freely mix 78C6X and 78C6U cartridges across different colour slots. For example, you can run a 78C6U ultra high yield black cartridge alongside 78C6X extra high yield colour cartridges without any software or performance issues.
What is the difference between Lexmark 78C6X and 78C6U series toners?
The primary difference is toner capacity and page yield. The 78C6X extra high yield black outputs 8,500 pages (5,000 pages per colour), whereas the 78C6U ultra high yield black delivers 10,500 pages (7,000 pages per colour), lowering your long-term cost per page.
Why does my Lexmark printer show low toner warnings well before pages start fading?
Lexmark laser printers calculate remaining toner using internal page counters and standard 5% page coverage estimates. Higher coverage printing causes toner to deplete faster than page counts suggest, but the printer prompts early to give your office ample time to reorder without experiencing downtime.
Is 78C6XKE the exact same item as 78C6X Black toner?
Yes, 78C6XKE is Lexmark's exact manufacturer part number for the 78C6X extra high yield black toner cartridge, with 'K' standing for black and 'E' denoting the regional corporate packaging.
