Tips for selecting a PSU?
Tips for selecting a PSU?
I'm searching for a suitable power supply for my upcoming mid-tier gaming setup, but I'm unsure about many aspects to compare different PSUs.
I've mainly focused on the wattage requirement, ensuring it meets at least gold certification and using a trusted manufacturer.
Besides that, what other considerations should I keep in mind?
In terms of power needs, I plan to use the ASUS PRIME GeForce RTX 5070. The manual suggests a minimum of 750W, while PC part picker estimates around 436W for my build.
I'm contemplating between two options: the CORSAIR RM750e (2025) and the MSI MAG A750GL. The differences in their descriptions are confusing since one lists three PCIe connectors and the other mentions only one with a 450W rating.
Should I look deeper into the CORSAIR model to understand its exact PCIe connector types?
Additionally, I'm planning to use a Gigabyte B650E Aorus Master motherboard. The documentation states it uses a single 24-pin ATX and two 8-pin 12V ATX connectors, but these details aren't clearly shown in the PSU specifications. The RTX 5070 is noted to require a 16-pin PCI-E 5.0 adapter, which isn't mentioned for either PSU.
Because the PSU supplies all the power, it stands out as the crucial part inside the PC. That’s why it’s essential not to compromise on quality! Also, avoid purchasing used PSUs altogether. For beginners wanting to learn about PSUs, this guide is a solid starting point (though it’s a bit lengthy), and here’s the link: https://forums. It’s a well-reviewed resource. More details can be found at: https://hwbusters.com/best_picks/best-at...e-busters/ All these PSUs have been evaluated by trusted reviewers (Aris) who compiled charts to highlight the best options. Choosing any of them ensures a high-quality build. Warranty is another factor: - 2 years – very unreliable - 3 years – poor reliability (e.g., Corsair VS/CS) - 5 years – average reliability (e.g., Be Quiet! Straight Power 11, Seasonic G12, Corsair CX/CXF) - 7 years – decent reliability (e.g., Seasonic Core/Focus GM, Corsair TX/AX) - 10 years – excellent reliability (e.g., Seasonic Focus GX/PX, Corsair RMx/HX/HXi/AXi) - 12 years – outstanding reliability (e.g., Seasonic Vertex/PRIME) Ideally, aim for a PSU with a 10-year warranty. A 7-year warranty is the minimum acceptable. A lower quality unit may suffice for an office PC without a dedicated GPU, but it’s unsuitable for systems with a dedicated GPU (like gaming rigs). If you prefer Corsair models, look for RMi, RMx, HXi, or AXi. Interesting note: many PSUs don’t include a warranty. Official specifications can be found here: https://www.msi.com/Power-Supply/MAG-A750GL-PCIE5 The page doesn’t mention warranty length directly, but it’s worth checking. MSI is famous for its PSU warranty challenges. For comparison, see my PSU specs (650W unit): https://seasonic.com/prime-titanium/ Warranty appears in the initial specs. My unit also has several reputable reviews, including one by Aris. PSU types with 16-pin PCI-E connectors are typically ATX 3.0 or 3.1, which most Corsair units lack (older models) and my ATX 2.5 PSU uses). There are adapters available to convert 8-pin to 16-pin if needed.
I see the importance of counting the number of 8-pin connectors. Pair that with the quantity and type of connectors on your selected graphics card. If you opt for a card with three 8-pin connectors and require two for your motherboard, then your power supply unit must support at least five 8-pin connectors. Some motherboards even favor three 8-pin connectors. Therefore, aim to obtain as many 8-pin connectors as possible.
It seems you're unsure about the distinction between 4/8-pin 12V EPS and 6/8-pin PCI-E. One is dedicated to CPU power, while the other serves for GPU, MoBo, or peripherals. Additionally, even though they share the same number of pins, their pin layouts differ and are keyed differently.
Comments from Aeacus above.
Specifically on estimating quality through the warranty.
Indeed, you'll incur higher costs for a 10-year warranty PSU.
I wouldn't factor in efficiency details like gold/silver/platinum, etc.
I'd opt for a more robust PSU than what's currently suggested—something with 750w to 850w or higher.
Modern graphics cards often experience significant temporary power surges that a stronger PSU can manage.
A more powerful PSU also enables future upgrades without issues.
This typically involves a moderate price increase.
An exceptionally strong PSU will only draw the power it needs, not exceeding its limits.
Some people are unsure about what they're discussing. The Corsair RM 750 e (2025) is the ATX3.1 variant of the RMe series. This power supply is completely suitable, featuring a 12v 2x6 connector and a 7-year warranty. It operates quietly as well. It's significantly quieter than the MSI MAG A-GL.
Yeah, the RM750e / RM850e are decent when they are priced well, sub $100. They don't fair too well when you start looking at the $120+ mark.
I've taken up reading through Cybenetics reviews for silence and efficiency. I then cross reference it with the slightly dated PSU tier list, and the one managed by PCMR.
https://www.cybenetics.com/index.php?opt...r-supplies
lambda for noise, ATX for efficiency.
PSU Tier List rev. 17.0g - Cultists Network
PSU Tier List will help you to choose the best PSU out of hundreds of models on the market. From budget to the highest end Power Supplies.
cultists.network
Direct google dock link:
https://docs.google.com/spreadsheet...RB...1719706335
Reminds me of the old Who's Who in Power Supplies that Tom's had back in the day. Very useful when you can spot the OEM behind the PSU label and compare similar models under, perhaps, unfamiliar names.
I didn't verify the details from the official specifications. I relied on what the OP mentioned about the PSU's connectors. Perhaps the OP isn't aware that the 12V-2x6 connector matches the 16-pin type they're seeking, which explains why RMe 2025 doesn't have that connector.
I wouldn't suggest even a minor upgrade of RMe for an enthusiast project. Just because the 850W model is priced similarly to the RMx doesn't mean it's the best choice—there are better internal components and a stronger warranty available. If the 850W RMe 2025 was sold for $85, it might still be worth considering for budget-focused builds...