A power supply is the least exciting part of a PC build, which is exactly why people underbuy it. Then they add a more power-hungry GPU later and wonder why things get weird. The Corsair RM850e is down to $99.99, a 31% discount from $144.99, and this is the kind of deal that makes it easy to do the sensible thing: buy a modern, properly specced PSU once and stop thinking about it.
What you’re getting
This is a fully modular 850W power supply built for modern builds, with ATX 3.1 support and PCIe 5.1 readiness. It includes a 12V-2×6 cable, which is useful if you’re pairing it with newer graphics cards that use the latest connector standard.
You’re also getting Cybenetics Gold efficiency, 105°C-rated capacitors, and Modern Standby support. In everyday terms, that’s a mix of efficiency, durability-focused components, and compatibility with current platform expectations.
Why it’s worth it
This deal is all about avoiding the most annoying kind of PC problem: instability that looks like a GPU or driver issue but ends up being power-related. A solid 850W unit gives you breathing room for performance parts and future upgrades, especially if you’re planning a high-end graphics card or you’ve already got one.
Fully modular design matters more than people admit. It makes cable management cleaner, improves airflow, and makes building and upgrading less painful. It’s also the kind of “quality foundation” purchase where you don’t feel the benefit every day, but you definitely feel it when things just work.
At $99.99, it’s also priced like an entry-level PSU, but the spec sheet is aimed at modern, higher-demand builds. That’s the sweet spot for a parts deal.
The bottom line
At $99.99, the Corsair RM850e is a strong value if you’re building or upgrading a PC and want a modern, fully modular 850W PSU with ATX 3.1 / PCIe 5.1 support and the included 12V-2×6 cable. If you’re running a low-power system, you can spend less. But if your build includes a newer GPU or you want headroom for the next upgrade, this is a smart buy at a great price.