Samsung QN77S90HAEXZA VESA pattern and wall-mount specs
The Samsung QN77S90HAEXZA — the 77-inch OLED S90H — uses a 400 x 300 mm VESA pattern and weighs 71.4 lb (32.4 kg) without its stand, according to Samsung's product page. Any wall mount whose range covers 400 x 300 and is rated for at least 71.4 lb will hold it.
Mount checklist for the QN77S90HAEXZA
- Pattern: 400 mm wide by 300 mm high (15.7 x 11.8 in). On a mount's box, both numbers must sit inside its range — "up to 400 x 400" fits this TV.
- Standard: a rectangular pattern outside the square Part F table, which is normal for current TVs; screws are usually M6 or M8 at this size, but the manual is the authority.
- Weight: 71.4 lb without the stand. Mounts are rated by maximum load; a mount rated 80 lb or more leaves no doubt, and full-motion arms should have more margin than fixed plates because the load sits further from the wall.
- Screws: use the screw length and any spacers the Samsung manual specifies. Too long can damage the panel; too short strips the insert.
- Wall: fix the mount to studs or masonry with the hardware the mount maker supplies for that wall type.
What that means when you shop
400 x 300 mm sits in the middle of the range most "medium to large" mounts cover — check that the mount's largest pattern is at least 400 wide and 300 tall, because some budget mounts stop at 300 x 300. At 71.4 lb it is a heavy set: plan a two-person lift, fix the mount into at least two studs or into masonry, and pick a mount whose rating leaves clear margin.
Closest in weight among other brands' 77-inch TVs: Sony BRAVIA 8 (71.2 lb, Not published); Sony BRAVIA XR8B (71.2 lb, 300 x 300 mm); LG OLED evo G6 (72.8 lb, 300 x 300 mm). None of them shares this TV's pattern — a reminder that size and weight don't predict the holes.
Samsung's other 77-inch models here — OLED S85H (400 x 300 mm, 62 lb), OLED S95H (400 x 400 mm, 69.9 lb) — use a mix of patterns, so check the exact model before buying a mount.
Among Samsung's 78 models here, 24 use 400 x 300 mm (31%), the most common Samsung pattern. It is a 2026 model, so the specs above come from a current listing.
Other sizes in the Samsung OLED S90H line
The pattern is not the same across the line: it changes from 200 x 200 mm on the 42" to 300 x 200 mm on the 48", and it changes from 300 x 200 mm on the 65" to 400 x 300 mm on the 77". A mount bought for one size is not automatically right for another.
| Model | Size | VESA (mm) | Weight |
|---|---|---|---|
| QN42S90HAEXZA | 42" | 200 x 200 mm | 18.3 lb |
| QN48S90HAEXZA | 48" | 300 x 200 mm | 23.4 lb |
| QN55S90HAEXZA | 55" | 300 x 200 mm | 32.2 lb |
| QN65S90HAEXZA | 65" | 300 x 200 mm | 42.1 lb |
| QN77S90HAEXZA | 77" | 400 x 300 mm | 71.4 lb |
| QN83S90HAEXZA | 83" | 400 x 300 mm | 82.9 lb |
How it compares with other 77-inch TVs
There are 15 other 77-inch models on this site. The most common pattern at this size is 300 x 300 mm (4 models); this TV's 400 x 300 mm is shared by 2 other 77-inch models. At 71.4 lb it is heavier than the 70.6 lb median for the size — heavier than 9 of them.
Across all sizes, 27 other TVs here use 400 x 300 mm, including models from LG, Sony — for example LG 55LX7BPUA (55"), LG 75QNED80TUC (75"), LG 75QNED85TAA (75"), Sony K77A60 (77"). The 400 x 300 page lists them all.
Where to sit
A 77-inch 16:9 screen is 67.1 in wide and 37.8 in tall. It fills the SMPTE 30° view from 10 ft 5 in and THX's 40° cinema view from 7 ft 8 in. At this size 4K looks sharper than 1080p only from 10 ft or closer; beyond that, 20/20 eyes cannot tell the two apart. The 77-inch size page has the full table and every model at this size.
Pattern and weight: Samsung product page for QN77S90HAEXZA, checked 2026-10-20; 2026 model. Viewing distances: geometry from the angles cited on the methodology page. Not affiliated with Samsung.