Is the TCL 27P3A good for HDR gaming?

Yes, on paper. The QD-Mini LED backlight with 1,100+ zones and 1,200-nit peak brightness is well beyond what edge-lit QHD monitors offer, so highlights and dark scenes have more range. Expect some blooming around small bright objects on black.

Can my GPU drive 260Hz at 1440p?

260Hz at QHD is demanding. Esports titles will get there on a strong card, but most modern AAA games will run well below that, so the high refresh mainly pays off in competitive shooters.

How does it compare with a 4K gaming monitor?

The 27P3A trades 4K sharpness for a much higher 260Hz refresh and mini-LED HDR. For fast games and HDR, it is the stronger pick; for desktop work and detail, a 4K panel at this size is sharper.

Does the mini-LED backlight cause blooming?

With 1,100+ zones, blooming is reduced compared with coarser mini-LED sets, but bright objects on dark backgrounds can still show a faint halo. Lower dimming settings reduce it at the cost of contrast.

What is in the box with the monitor?

The listing covers the monitor and its stand; check the box contents for the cable types included, since DisplayPort is needed to reach the full 260Hz on most setups.

Is a 27-inch QHD screen big enough?

QHD at 27 inches gives a dense, sharp image at normal desk distance and is easier to drive than 4K. It is a common sweet spot for gaming, though some prefer 32 inches for immersion.