“MSI MPG A1250GS vs MAG A1250GL for RTX 5090 – Cables, Compatibility & Technical Differences 🤔⚡”

[minor pond]

Hey! 👋

I’m planning a new build with an RTX 5090 (probably MSI Suprim Trio) and I’m trying to decide between these PSUs:

MPG A1250GS PCIE5
MAG A1250GL PCIE5

I have a bunch of questions and would love insights from anyone who has experience with these PSUs or the 5090.

1️⃣ Real-world experience with RTX 5090

Has anyone used these PSUs with the RTX 5090 under full load? ⚡

Any stability issues, voltage drops, strange noises, or cable/adapter heating? 🔥

Would undervolting the GPU be recommended to reduce PSU stress? 🛠️

2️⃣ Technical differences between A1250GS & A1250GL

Which one has better voltage regulation, lower ripple, or better transient response? 📈

Any differences in internal components (caps, fan, build quality) affecting performance with high-end GPUs?

Which PSU has better lab-test scores (if any)? 🏆

3️⃣ Cables & compatibility

Have the 12VHPWR / 12V-2×6 cables in the A1250GS been improved compared to previous versions? ✨

Are these cables still compatible with the MAG A1250GL, or exclusive to the GS?

Differences in wire gauge, length, or shielding between notable versions?

Would you recommend using third-party adapters or stick to the ones that come with the PSU? 🔌

4️⃣ User precautions

Anyone experienced “melting” or connector overheating with these PSUs + 5090? ⚠️

Tips for cable management and safety when installing the RTX 5090? 🧰

Which one do you consider safer or more reliable for a high-end setup with extra peripherals and potential overclocking? 🔒

5️⃣ Open questions

Noise differences under full load? 🎧

Anyone measured real electrical performance with the 5090 (stable voltage, ripple, spikes)? ⚡

Differences between batches or revisions that we should be aware of? 🕵️‍♂️

Any personal experiences, advice, or links to reviews would be super helpful! I want to make sure the PSU I choose is 100% compatible & reliable for an RTX 5090 with all my peripherals and potential overclocking.

Thanks in advance for your help! 🙏💻

[spring knot]

So I'm going to keep it real here. If all these super overly technical questions mattered or you completely understood what you're asking, you should probably know how or where to find the answers to your questions. These are things that would only be mentioned in a detailed review of these units.

So with that being said 90% of what you're asking doesn't matter in the real world to 99% of people. You don't have to overthink this. You just need to find a PSU that has sufficient wattage, on a trusted platform and has a good warranty. That's it.

You can find reviews of both units here. The 1250W GS in particular wasn't reviewed but the 1000W GS is made on the same platform by the same OEM.

https://hwbusters.com/psus/msi-mag-a1250gl-pcie5-atx-v3-1-psu-review/

https://hwbusters.com/psus/msi-mpg-a1000gs-pcie5-atx-v3-1-psu-review/

Lastly if this is truly what you care about, neither of these PSUs should be on your radar as neither are the best of what MSI/CWT offers in it's units. You should be looking at PSUs like

• NZXT C1200
• be quiet! Pure Power 12 M 1200W
• Thermaltake Toughpower GF3 1200W
• Corsair RM1200x SHIFT

Just to name a few. If you ***HAVE ***to have a MSI unit the one to get in this wattage capacity would be the MSI MEG Ai1300P but it's a platinum rated supply and is still overly expensive.

Lastly only use the cables that come supplied with the PSU and no 3rd party anything when it comes to 12VHPWR/12V-2x6 cables. Good luck.

[minor pond]

Dear friend, I am very grateful for your reply. My concern stems from the considerable increase in burn problems presented by the RTX MSI 5090 cards. Although I understand that few might care, the truth is that when they buy a 5090, they face various demands. Not only did I need to replace my power supply, but also my cabinet, my motherboard and buy a new PSU. I live in Latin America and, unfortunately, I doubt that I will be able to acquire another 5090 in the future. I think the best solution I found was in the ASRock brand, which offers a special cable with a sensor that detects heat and functions to maintain clean energy. Hopefully MSI can offer greater protection and measures in the power source, cable and graphics cards. Attach a link where the burn problem is reported again: https://www.reddit.com/r/pcmasterrace/comments/1obwj09/another_5090_down_in_flames/

[kind marsh]

Hi
Gf3 has been swapped in NA

[twilit holly]

Also be sure to use the instructions that come along with the gpu/psu using 4 separate 8 pin pcie connections is recommended. And ensure everything is firmly fully connected

[twin ravine]

I use the MSI MEG AI1300P with the RTX 5090 Suprim and I dont have problems so far
I use the 600W cable directly from the GPU to the power supplie