ASUS PA278CFRV vs BenQ PD3205U: ASUS extends one compatible PC across screens, BenQ shares two PCs’ controls

Check these before buying

• Confirm the exact US ASUS PA278CFRV or BenQ PD3205U, condition, supplied stand, cables, controls, seller and return terms. The BenQ PD3205UA arm model and other ProArt models are different purchases. No current price, stock, delivery or seller advantage is claimed.
• For ASUS daisy chaining, inspect the complete path from the computer through DP input and DP output to one additional screen. The manual’s QHD 100Hz example has no USB-C device connected. Set Power Saving to Normal Level and expect a fixed input without auto detection. Deep Level is documented as producing cloned content. Choose the DP Stream setting appropriate to the graphics hardware from DP 1.2, DP 1.4 or DP 1.4 plus USB 3.2. Do not select a version the source cannot support.
• Confirm extended DisplayPort MST support for the exact computer, graphics hardware, operating system and second display before buying for the chain. USB-C socket shape, a Mac compatibility badge or ordinary single-display support does not establish two extended screens. The ASUS manual also describes USB-C daisy chaining, but this comparison does not assume the DP QHD 100Hz example applies with USB-C charging and data active. Verify that different arrangement separately.
• For BenQ KVM, connect at least two complete source paths. The default pairings are USB-C for video and data, DisplayPort with USB 1 upstream, and HDMI with USB 2 upstream. Connect the keyboard and mouse to downstream monitor ports, verify the physical inputs assigned in the KVM menu and set System > Power Awake to ON as the two-computer instructions require. The manual describes automatic KVM enablement after proper connections. Switch with the input control, KVM menu or Hotkey Puck G2. Video cables alone do not carry USB peripheral data.
• If KVM control fails after reconnecting computers, recheck both video and USB cabling and the stored USB 1 or USB 2 input pairing. The monitor can remember an earlier assignment. A USB-C host connection must actually carry video and data. Confirm the exact host and operating-system compatibility, especially with Mac models whose display support varies by chip. The KVM switches control between computers and does not merge their sessions.
• For BenQ USB-C 3840 by 2160 at 60Hz, set System > USB-C Configuration to USB 2.0. Its listed data ceiling is 480 Mbps. USB 3.2 Gen 1 instead permits a 5 Gbps USB link and limits that USB-C 4K signal to 30Hz. These are link limits, not measured file-transfer speeds. If fast storage and 4K60 are both mandatory, assess separate video and data connections or another dock rather than assuming one cable supplies both.
• For one-to-one review of a complete 3840 by 2160 image, use BenQ’s native panel resolution, a compatible output and cable, and a full-screen viewer with one image pixel per display pixel. Check the actual signal and app zoom. Toolbars may require a smaller image area. ASUS cannot fit every pixel of that complete image on its QHD panel at once. This does not establish measured color accuracy, readable text size or equal HDR performance.
• Measure 613.3 mm width and 197.2 mm stand depth for ASUS, or 714.7 mm width and 256.8 mm stand depth for BenQ, plus space for cables and any second display. Confirm your own stand or arm arrangement separately. BenQ’s larger diagonal is not a promise of more usable app space after operating-system scaling.
• Both monitors need mains power. ASUS USB-C supplies up to 96W and BenQ up to 90W to a compatible USB Power Delivery device through a suitable cable. Compare the laptop’s required operating and charging power, including heavy loads and startup from an empty battery. Keep its original adapter when needed. BenQ requires Power Awake ON for USB-C charging in monitor standby. No claim is made that either replaces every laptop charger.
• Check every cable and accessory in the selected offer. ASUS marks HDMI, DP and USB-C cables as optional in its manual, while its US specification lists accessories that vary by region. BenQ lists DP, HDMI, USB-C, a USB upstream cable and Hotkey Puck G2, with regional variation. Do not assume the box supplies every extra cable required for two computers or a second screen.