Corsair RM850x PSU sees decent price cut in this Amazon deal, perfect for high-end builds
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If you’re searching for components for a new gaming PC and were wondering which PSU to go for, we’d recommend you take a look at the Corsair RM850x. This is an ATX 3.1 PSU, meaning it is designed to handle the power draw of the latest graphics card, and Corsair PSUs also have excellent performance. It has 20% shaved off its asking price, and you can grab it for $135.99.
An 850W capacity is perfect for a build with the RTX 5080 without causing any issues. It should also allow you to easily overclock the processor and GPU, but that also depends on which processor and GPU you’re using. Overall, it can handle high-end components and should future-proof your setup.
CORSAIR RM850x
- It has a 12V-2×6 connector
- PCIe 5.0 and ATX 3.1 compliant
- Gold efficiency rating
- If you plan to use an RTX 5090
- If you’re building a budget gaming PC
Why you should get this PSU deal
This power supply unit has everything you’ll need to safeguard and power your high-end gaming PC without any issues. For starters, it is ATX 3.1 compliant, meaning that it comes with the 12V-2×6 connector that can deliver up to 600W. This enables this cable to power the RTX 5090 without needing another connection, but that changes when you add overclocking to the equation.
Prime Day may have ended, but that hasn't stopped major retailers slashing prices on popular tech hardware. Below, we've listed some of the best deals available today.
- AMD Ryzenâ„¢ 9 9900X 12-Core - was $499 now $328
- CORSAIR 4000D PC Case - was $124.99 now $75.99
- Hisense 65" Class E6SR - was $549 now $377.99
- Apple 2026 MacBook Air - was $1,999 now $1,799
- Skytech Gaming PC Desktop (9850X3d) - was $4,299 now $3,799
- Apple Magic Mouse - was $79 now $59
- MSI Prestige 16 Flip - was $2,149 now $1,899
- Kotin 9700X Gaming PC - was $2,399 now $2,199
Prices correct as of October 9th, 2026.
With PCIe 5.0, the communication between the GPU and the rest of the system via the PCIe 5.0 slot should be super fast, as it should be able to make full use of the available bandwidth. The fully modular nature of this power supply unit means that you can avoid unnecessary connections, reducing clutter and resulting in a cleaner-looking build.
It has a single 140mm FDB fan with a magnetic dome structure, which works to reduce the noise. This fan also have bearing with fluid to keep the wear and tear at a minimum, prolonging the life of the fan. The Zero RPM mode is also excellent to add to that, as it keeps the fan from spinning unless it detects significant power being pulled. That being said, if you’re in a hot region and want more airflow through your PSU, you can use the manual fan override knob to increase the fan speed and airflow, overriding the Zero RPM mode.
We’ve also reviewed the Corsair RM850x Shift White, and you can check out its detailed breakdown. However, if you’re looking for a quick summary, it easily handled the Ryzen 9 7950X and RTX 3090 during the Furmark 2 stress test and delivered 705W, meaning a decent amount of overhead for other components.
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