28/03/2026 12:10 pm
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Im really stressed about my 4090 build this weekend. Im stuck between the Corsair RM1000e and the Seasonic Vertex GX-1000 since they are both around 180 quid here in London.
I heard some cables melt if you dont get the right ATX 3.0 stuff. Which one is actually safer for a 4090?
4 Answers
11
28/03/2026 12:55 pm
In my experience, Be Quiet Pure Power 12 M 1000W 80+ Gold ATX 3.0 provides the best technical value. It'll manage 4090 voltage regulation flawlessly while staying well under your 180 quid budget.
10
28/03/2026 12:10 pm
TL;DR: Get the Seasonic. The Seasonic Vertex GX-1000 1000W 80+ Gold ATX 3.0 is way more robust than the Corsair RM1000e 1000W 80+ Gold ATX 3.0, which uses cheaper capacitors imo. Seasonic cables are usually easier to manage too. Just be careful with that 12VHPWR connector; make sure it clicks in completely. If its even slightly loose, thats when you get melting issues.
3
28/03/2026 12:45 pm
RM1000e felt kinda cheap unfortunately. Skip both and get:
- Super Flower Leadex VII Gold 1000W ATX 3.0 It handles 4090 spikes way better and stays quiet tho...
2
28/03/2026 12:25 pm
Regarding what #1 said about the RM1000e capacitors, hes spot on. If you want other options that arent the Seasonic, check these:
- MSI MPG A1000G PCIE5 1000W 80+ Gold ATX 3.0 handles 4090 power spikes easily and stays quiet.
- Thermaltake Toughpower GF3 1000W 80+ Gold ATX 3.0 is another tank I've used in customer builds. Both are native ATX 3.0 so no dodgy adapters needed.
