The Samsung Odyssey G5 hits 165 Hz only with the right cable

What it actually is

A 34-inch ultrawide gaming monitor, 3440×1440, VA panel, curved to 1000R — the tightest curve Samsung puts on a consumer ultrawide. It is sold with a 165 Hz refresh rate on the box, and the box is right, but only under one condition that is easy to miss until the monitor is on your desk.

The cable decides what you bought

Samsung's manual states the optimum resolution for this model as:

And the refresh-rate menu spells it out again: DisplayPort offers 60, 100 and 165 Hz; HDMI offers 60 and 100 Hz.

That is not a defect. It is the bandwidth arithmetic of HDMI 2.0 at this resolution. But it matters, because it decides the review:

• With DisplayPort, you get the monitor as advertised.
• With HDMI, you get a 100 Hz ultrawide, which is still a good monitor and is not the one on the box.

If you are buying this for a laptop, check what the dock passes through before you buy. Many USB-C docks give you HDMI; fewer pass DisplayPort through.

The 1 ms claim, read carefully

The Amazon listing says 1 ms MPRT and 165 Hz. Samsung's manual describes the machinery behind those numbers, and the machinery has conditions.

Fastest (MBR) — the motion-blur-reduction response mode — is only available when the refresh rate is set to 165 Hz. And Low Input Lag cannot be used while FreeSync is enabled, or at 120/144/165 Hz on the smaller models.

So the fastest settings and the smooth settings are partly mutually exclusive. That is normal for gaming monitors, and almost no listing mentions it. If you are buying for competitive play, you should know that "1 ms" and "FreeSync on" are not the same configuration.

Resolution and size, in real numbers

Samsung gives the display area as 797.22 mm × 333.72 mm — 31.4″ × 13.1″. Pixel pitch is 0.07725 mm horizontal × 0.23175 mm vertical, which is the giveaway that this is not a standard panel: the horizontal and vertical pitches differ because the subpixel layout is different from a conventional RGB strip.

That is worth knowing if you do text-heavy work. Vertical subpixel layouts are historically harder on font rendering than horizontal ones, and it is the kind of thing a spec sheet states and never explains.

Maximum pixel clock is 879.714 MHz at 3440×1440 and 165 Hz. That is what the DisplayPort bandwidth is being spent on.

What it is good at

For a single wide workspace, the arithmetic works. Two 2560×1440 screens side by side give you a bezel in the middle; this gives you 3440 pixels in one surface, which is close to one and a third of them. For code with a file tree, an editor and a terminal, or a spreadsheet with a chart beside it, that is a genuinely better arrangement.

The 1000R curve is the other half of the argument. On a 34-inch ultrawide, the far edges sit at a wide angle from your eye if the panel is flat. The curve pulls them back towards you. Whether you like it is taste; whether it helps the geometry is not.

FreeSync Premium runs from 48 Hz to 165 Hz according to the manual's synchronisation range, which is what lets low-frame-rate content stay smooth without visible tearing.

What it is not

It is not a colour-critical panel. The listing describes it as VA, and while Samsung markets it as having "true to life colours" with HDR10, a VA panel at this price point is chosen for contrast, not accuracy. If you grade video, this is the wrong monitor and no amount of calibration makes it the right one.

It is not a competitive-shooter monitor, despite the marketing. It is an immersive single-player and productivity monitor with gaming-grade refresh.

And it does not solve desk ergonomics on its own. The included stand's adjustment is documented in the manual, but the monitor is heavy and wide, and most people end up wanting an arm. That is a separate purchase, and the weight matters — check the arm's rating before you assume it will hold.

Mounting it: 75 × 75, and the screw depth matters

If you plan to put this on an arm or a wall, the manual's page 12 is the page you need, and it holds a surprise:

Specifications

VESA pattern	**75 × 75 mm**
Screw	**M4**
Screw depth	**6.8 – 10.0 mm**
Quantity	4
Maximum tilt on a wall mount	**15°**

75 × 75 mm is unusual for a 34-inch panel. Most arms sold for monitors this size expect 100 × 100, and a heavy ultrawide is exactly where people assume the larger pattern applies. Check the arm's plate before buying either one.

The screw depth is the part that destroys monitors. Samsung warns explicitly that screws longer than standard will damage the interior. Most arms ship with M4 bolts around 12–16 mm, which is past the 10 mm limit. Use the correct length or add spacers.

And the 15° wall-mount tilt ceiling is Samsung limiting the load on the mounting boss — it is not the arm's limit, and it applies even when the arm can go further.

What to mount it on — and what not to

The obvious idea is the HUANUO HNDS6 dual arm reviewed here, since it is a gas-spring arm at a sensible price. It is the wrong arm for this monitor, and the reason is worth stating plainly because it is easy to get wrong in the other direction.

That arm's stated screen range is 13 to 32 inches. This monitor is 34 inches. The weight may well fall inside the arm's 4.4–19.8 lb (2–9 kg) per-arm limit, but the size is outside what the manufacturer documents, and "it held when I tried it" is not the same as a supported configuration.

What to check on any arm for this monitor:

• A plate that covers 75 × 75 mm, or a 100 × 100 plate with a 75 adapter
• M4 screws in the 6.8–10.0 mm depth range, or spacers to get there
• A rated capacity above this monitor's actual weight — weigh it, don't assume

The Samsung utility nobody mentions

Bundled with the monitor family is Easy Setting Box, a window-management tool that splits the screen into layouts and, unusually, lets one keyboard and mouse control both a smart monitor and a connected computer.

On a 3440-pixel-wide screen, Windows' own snapping is coarse — halves and quarters. A layout tool that gives you 60/40, or a wide column plus two stacks, is genuinely useful on this aspect ratio. It is a small thing that improves the monitor's actual daily life, and the manual for it is a 42-page document most owners will never open.

Questions

Sources

• Samsung G55T user manual, BN81-22481A-01 (English)
• Samsung Easy Setting Box user manual 3.1.6
• Amazon listing, Samsung Odyssey G5 34" LC34G55TWWNXZA