49 vs 57 Inch Super Ultrawide: DQHD vs Dual 4K

Both are 32:9, so each is two 16:9 screens side by side. The 49-inch is 5120 x 1440, two 1440p screens at about 109 PPI. The 57-inch is 7680 x 2160, two 4K screens at about 140 PPI. Width and height grow by the same ratio, 1.16x, because the aspect ratio does not change.

Everything else in the decision follows from that: how sharp text is, how much the graphics card has to draw, and how much desk the panel takes.

Screen sizes in the table treat the diagonal as a flat measurement. Curved monitors quote the diagonal along the curve, so the box on your desk is a little narrower than the flat figure. Both catalog models named in this guide are 1000R curves.

The 57-inch panel is 54.9 inches (139.4 cm) wide and 15.4 inches (39.2 cm) tall, against 47.2 inches (119.8 cm) by 13.3 inches (33.7 cm) for the 49-inch. The extra 2.2 inches of height is the part people notice: the 57-inch is as tall as a 31.5-inch 16:9 monitor, the 49-inch as a 27.1-inch one.

Use the overall width of the box, not the flat screen width. Samsung Odyssey G9 G91F 49 in our catalog is 45.2 inches (114.8 cm) wide and Samsung Odyssey Neo G9 G95NC 57 is 52.3 inches (132.8 cm). Catalog 5120 x 1440 monitors list overall widths from 45.2 to 47.8 inches, so check the exact model.

On a 48-inch desk the 49-inch model leaves 2.8 inches in total, about 1.4 inches a side; the 57-inch model does not fit. A 60-inch desk leaves 7.7 inches in total for the 57-inch model, about 3.9 inches a side. A 72-inch desk gives either one room for speakers and a monitor arm.

Depth and weight also grow. With stand, the 49-inch is 16.6 inches deep and 34.4 lb; the 57-inch is 19.7 inches deep and 41.9 lb. Both list a 100 x 100 VESA mount, but check an arm's rated capacity against the heavier panel (34 lb without the stand).

Pixel count is the part you can state without a benchmark. The 49-inch draws 7.4 million pixels per frame, 11 percent fewer than a single 4K monitor. The 57-inch draws 16.6 million, exactly twice a single 4K monitor and 2.25 times the 49-inch. Frame rates at those pixel counts depend on the game, the settings and the graphics card, so we do not quote any.

Cables follow the same arithmetic. Raw pixel data at 24 bits per pixel, before blanking and link overhead, is 25.5 Gbit/s for 5120 x 1440 at 144Hz and 95.6 Gbit/s for 7680 x 2160 at 240Hz. DisplayPort 1.4 carries about 25.9 Gbit/s of data, which leaves the 49-inch almost no headroom once blanking is added, and DisplayPort 2.1 at UHBR20 carries about 77.6 Gbit/s, so the 57-inch at 240Hz needs compression (Display Stream Compression) even on DisplayPort 2.1. Our catalog does not record port versions for these two models, so confirm the ports on the monitor and the outputs on your graphics card.

Scaling is where the 57-inch changes daily use. At 100 percent scaling, text on the 140 PPI panel is drawn 22 percent smaller than on the 109 PPI panel. At 150 percent scaling the 57-inch gives a 5120 x 1440 workspace, the same as the 49-inch at 100 percent, with sharper text. At 125 percent it is 6144 x 1728.

Choose the 49-inch if your desk is 48 to 60 inches wide, your graphics card has limited headroom, or you want a super ultrawide that behaves like two ordinary 1440p monitors. Choose the 57-inch if you want the same width in sharper text and a taller panel, and you have the desk width, the arm capacity and a graphics card and cable that can drive it.

If you are still deciding between a super ultrawide and a smaller ultrawide, the 34-inch to 49-inch comparison and the desk-size guide cover that step.