
Redragon K556
Score: 78/100
Razer Tartarus Pro
Score: 80/100Rankings

The Tartarus Pro is a left-hand ergonomic keypad featuring 32 programmable analog optical switches, rapid trigger technology, and per-key RGB lighting. It excels in customization and low-latency input but demands Razer software and has a steep learning curve.

The Redragon K556 is a full-size, metal-framed mechanical keyboard that offers hot-swap capability, tactile brown switches, and vibrant RGB lighting with onboard memory. While it delivers solid build quality and customization options, its weight, lack of per-key lighting, and non-detachable cable may deter users seeking portability.
| Attribute | ![]() | ![]() |
|---|---|---|
— | 1,000 Hzbest | |
| ↓ lower better | 1,000 g | 363 gbest |
— | 24 monthsbest | |
104 keysbest | 32 keys |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Performance(2) | ||
N-Key Rollover (keys) | NKRO keys | full keys |
Onboard Memory | true | false |
Lighting(1) | ||
Backlighting Type | RGB | per-key |
Switches(1) | ||
Switch Type | Brown | Analog Optical |
Build & Design(3) | ||
Form Factor | Full-size | ergonomic left-hand |
Key Count (keys) | 104 keys | 32 keys |
Weight (g) | 1000 g | 363 g |
Connectivity(2) | ||
Connectivity Type | Wired | USB 2.0 |
Cable Type | Braided fiber | braided fiber |


Products in the top-left offer the best value (high score, low price).

Professional reviewers commend the K556 for its solid metal chassis, hot-swappable design, and generous spare-switch bundle, noting that the lack of per-key RGB and a fixed cable are minor trade-offs for its price.
Everyday users overwhelmingly praise the build quality, tactile brown switches, and vibrant lighting, though they point out imperfections in keycap finish, the heavy weight, and the non-backlit Fn legends.

Professional reviewers commend the Tartarus Pro for its innovative analog optical switches, extensive customization options, and rapid trigger feature, but criticize the awkward dual-function key layout, the fact that Windows treats it as a controller, the lack of true onboard memory, and its premium price.
Everyday users love the solid build, smooth analog feel, vibrant RGB, and macro/profile flexibility, yet many complain about the steep learning curve of dual-function keys, the need to keep Synapse running, a stiff scroll wheel, and occasional hand fatigue.
“best keyboard I've ever owned”

“Analog switches feel incredibly smooth and responsive.”

“Having to keep Synapse open all the time is annoying.”

