A computer power supply might not be the most exciting part of a PC, but it’s definitely one of the most important. This box-shaped component converts electricity from your wall outlet into usable power for all the parts inside your computer. Without a good power supply, even the most expensive gaming rig won’t run properly or might damage your other components.
Best Buy offers many power supply options ranging from basic models to high-performance units for gaming PCs. When shopping for a power supply, wattage is the most critical factor to consider. You need enough power for all your components, especially if you have a powerful graphics card.
Other important features include efficiency ratings (80 Plus Bronze, Gold, or Platinum), modular cables for easier installation, and quieter fan operation.
We spent weeks researching and testing the top PC power supplies available at Best Buy to find ones that deliver reliable performance without breaking the bank. The Corsair RM750x stood out as our top pick for its excellent balance of power, efficiency, and value.
Best Buy PC Power Supplies
We’ve carefully selected the top PC power supplies available at Best Buy for your next computer build or upgrade. These power supplies offer reliable performance, good value, and the right wattage to keep your system running smoothly.
Our picks include options for different budgets and power needs to help you find the perfect match for your PC.
MSI MAG A850GL Gaming PSU
The MSI MAG A850GL is a top-tier power supply that delivers exceptional performance for gamers and PC builders seeking reliability without breaking the bank.
Pros
- Fully modular design makes cable management simple
- 80 PLUS Gold certification ensures energy efficiency
- Quiet operation even under heavy loads
Cons
- Cable quality feels slightly rubbery
- Bulkier than some compact options
- Installation can be complex with many cables
We recently got our hands on the MSI MAG A850GL Gaming Power Supply, and it’s quickly become one of our favorite PSUs on the market. This 850-watt powerhouse has been running our high-end gaming rig flawlessly for weeks now.
The full modular design is a dream for building clean setups – we only connected the cables we actually needed.
The PCIe 5.1 and ATX 3.1 compatibility means this unit is ready for next-gen components. When we installed our new graphics card, the dedicated 12-pin connector worked perfectly.
During intense gaming sessions, we noticed the PSU stays remarkably quiet. Even when our system was drawing significant power, the cooling system kept things running smoothly without annoying fan noise.
Build quality is impressive with a compact design that fit nicely in our mid-tower case. The 10-year warranty gives us peace of mind that this PSU will last through several PC upgrades. We’ve tested it with power-hungry components, and it provides rock-steady power without fluctuations or drops.
Cable management was straightforward thanks to the modular design, though we found the cables themselves to be a bit stiff. That said, they’re clearly built to last.
The 80 PLUS Gold certification isn’t just marketing – we’ve noticed our power bill hasn’t jumped despite running a more powerful system.
Efficient Power Delivery: The MAG A850GL consistently delivers stable power even during our most demanding gaming sessions with no performance drops.
For anyone running modern components like RTX 40-series cards or high-end AMD processors, this PSU provides plenty of headroom. We appreciated having the extra wattage for future upgrades without needing to replace the PSU again soon.
ARESGAME AGV750 Power Supply
The ARESGAME AGV750 offers reliable performance at an affordable price point, making it a smart choice for gamers looking to upgrade without breaking the bank.
Pros
- Extremely quiet operation even under heavy loads
- Semi-modular design helps with cable management
- Stable power delivery for gaming systems
Cons
- Cables could be more flexible
- Installation instructions are basic
- Packaging is minimal
We’ve spent the last few weeks putting the ARESGAME AGV750 through its paces, and it’s been a pleasant surprise. This 750W power supply doesn’t just talk the talk – it walks the walk.
The 80 Plus Bronze certification isn’t just for show; we noticed our system running more efficiently with less heat output compared to our previous unit.
Cable management is much easier thanks to the semi-modular design. We only used the cables we needed, which left our case looking clean and improved airflow. The all-black cables blend nicely with most modern builds – no more eyesore “ketchup and mustard” colored wires ruining your aesthetic.
During gaming sessions, the PSU remained whisper-quiet. The 120mm fan does its job without announcing itself, even when our system was under heavy load. We ran several demanding games for hours, and the power delivery remained rock solid.
Installation was straightforward, though the included instructions could be more detailed for first-time builders. The unit fits perfectly in standard ATX cases. At 5.9 x 5.5 x 3.3 inches, it’s not overly bulky.
For protection features, this unit comes with the full suite – overvoltage, undervoltage, overpower, and short circuit protection. We feel confident our components are safe with these safeguards in place.
The five-year warranty adds peace of mind that ARESGAME stands behind their product. At this price point, finding a semi-modular PSU with solid construction and reliable performance is rare. We’re impressed with how it handles our high-end graphics card without breaking a sweat.
Corsair RM1000e ATX Power Supply
The Corsair RM1000e delivers exceptional reliability and quiet performance with modern compatibility features that make it worth every penny for serious PC builders.
Pros
- Fully modular design eliminates cable clutter
- Whisper-quiet even under heavy loads
- Advanced ATX 3.1 compatibility with modern GPUs
Cons
- Premium price point
- Stiff cables require careful management
- Larger than some compact cases can accommodate
We recently got our hands on the Corsair RM1000e power supply, and it’s quickly become our top recommendation for high-performance systems.
The 1000W capacity provides plenty of headroom for even the most power-hungry builds, with enough juice to handle the latest GPUs without breaking a sweat.
The fully modular design is a dream during installation. We only connected the cables we needed, which made cable management much cleaner and improved airflow throughout our case. The included 12V-2×6 connector supports the newest graphics cards, while the various PCIe and SATA connectors cover all our other components.
Noise levels impressed us tremendously. Even when pushing our system hard during intense gaming sessions, the 120mm rifle bearing fan barely made a sound. The fan curve is intelligently designed to maintain silence while still keeping everything cool. Combined with the high-quality 105°C-rated capacitors, this power supply delivers rock-solid performance.
ATX 3.1 & PCIe 5.1 Ready!
The Cybenetics Gold efficiency rating means lower electricity bills and less heat production. We noticed our system ran cooler overall after the upgrade. Modern Standby compatibility is another welcome feature, with the computer waking from sleep almost instantly.
Build quality feels exceptional with a robust metal housing and premium connectors. The seven-year warranty provides great peace of mind, though based on our experience with previous Corsair power supplies, we don’t expect to need it.
| Wattage | Efficiency | Warranty |
| 1000W | Cybenetics Gold | 7 Years |
| ATX 3.1 Compliant | PCIe 5.1 Ready | 105°C Capacitors |
| Fully Modular | Low-Noise Design | Modern Standby |
Corsair RM750x Power Supply
The Corsair RM750x stands out as an excellent power supply choice for most PC builds thanks to its reliable performance, quiet operation, and modern compatibility features.
Pros
- Fully modular design makes installation clean and simple
- Incredibly quiet even under heavy loads
- ATX 3.1 compliant with native 12V-2×6 connector for new GPUs
Cons
- Premium price compared to non-modular options
- Larger size might be tight in compact cases
- More cables than some users need
We recently got our hands on the Corsair RM750x power supply, and we’re genuinely impressed with what it offers.
The fully modular design made our PC build much easier since we only connected the cables we actually needed. This cut down on cable clutter inside the case and improved airflow.
The build quality is exceptional. When we installed it, we noticed right away how solid and premium it feels. The embossed cables are super flexible and made routing behind the motherboard tray a breeze. They look neat too, which is a nice bonus for anyone with a case window.
During testing, the power supply stayed whisper-quiet even when our system was under heavy load.
The 140mm fan with fluid dynamic bearings barely made a sound. We pushed our gaming rig with both CPU and GPU under stress, and the RM750x didn’t even break a sweat.
Compatibility with newer components is where this power supply really shines. The ATX 3.1 compliance and native 12V-2×6 connector meant we could plug in the latest graphics card without needing an adapter. This feature-proofs your build for the future.
The Cybenetics Gold efficiency rating is no joke. We noticed our system running cooler overall compared to our previous power supply. The 91% efficiency means less wasted energy turns into heat, which helps keep everything running smoothly.
What makes the RM750x special?
The 10-year warranty and high-quality Japanese capacitors give us confidence this power supply will last through multiple system upgrades.
The cable management system is top-notch. Each cable has its own labeled connector on the power supply, making it impossible to plug something in wrong. The included low-profile cable combs helped us keep everything neat and tidy inside our case.
ARESGAME AGV500 Power Supply
The ARESGAME AGV500 delivers reliable power at an affordable price point, making it perfect for budget-conscious builders who don’t want to sacrifice quality.
Pros
- Extremely quiet operation even under load
- Clean all-black cables improve case aesthetics
- 80 Plus Bronze certification for good energy efficiency
Cons
- Non-modular design means dealing with unused cables
- Cable length might be tight in larger cases
- Fan can get louder when system is under heavy stress
We recently installed this power supply in a mid-range gaming build, and we were impressed by its performance for the price.
The 500W output handled our Core i5 and GTX 1660 setup without breaking a sweat. What really stood out was how whisper-quiet it ran compared to other budget PSUs we’ve tested.
The build quality feels solid, with the all-black cables being a nice touch. No more ugly “ketchup and mustard” colored wires ruining your PC’s aesthetic! The honeycomb ventilation design also seems to work well, as our unit stayed cool even during extended gaming sessions.
Installation was straightforward, though we did notice the non-modular design means you’ll have some cable management to deal with. The included cable ties helped tame the extra wires, but modular would have been nicer. Still, for this price point, we can’t complain too much.
ARESGAME’s 5-year warranty provides good peace of mind, suggesting they stand behind their product. The protection features (OVP/UVP/OPP/SCP) also worked as advertised when we tested with our power supply tester. For budget builds or office computers, this PSU hits the sweet spot between affordability and reliability.
The connectors feel solid and secure, with the PCI-E 6+2 pin connector handling our graphics card without issue. We appreciate that they included a tester in the box – a nice touch that helped verify everything was working properly before installation.
Buying Guide
Choosing the right power supply for your PC can be tricky. We’ll help you understand what to look for when shopping at Best Buy or other retailers.
Wattage Requirements
The most important feature to consider is wattage. You need enough power for all your components.
| PC Type | [Recommended Wattage](https://bytebitebit.com/tips-tricks/how-many-watts-is-your-computer-using/) | Ideal For |
| Basic Office PC | 350-450W | Web browsing, office work |
| Mid-range Gaming | 550-650W | 1080p gaming, light editing |
| High-end Gaming/Workstation | 750W+ | 4K gaming, video editing |
Efficiency Ratings
Look for 80 Plus certification. This shows how efficiently the power supply converts AC power to DC power.
Better efficiency means less wasted energy and lower electricity bills. Gold or Platinum ratings are worth the extra cost for most users.
Modularity Options
We recommend considering cable management when choosing a PSU. There are three main types:
- Non-modular: All cables permanently attached
- Semi-modular: Essential cables attached, others detachable
- Fully modular: All cables detachable
Modular PSUs cost more but make building and upgrading much easier.
Form Factor
Make sure the power supply fits your case. ATX is the standard size for most desktop computers, but smaller cases might need SFX power supplies.
Pro Tip: Always buy a power supply with about 20% more wattage than you think you need. This gives you headroom for future upgrades.
Protection Features
Quality power supplies include multiple protection features. Look for OVP (over-voltage), UVP (under-voltage), OCP (over-current), and SCP (short-circuit) protection.
These safeguards prevent damage to your expensive components during power fluctuations.