Side by side
850W PSU vs Seasonic
850W PSU
48 positive (86%) · 3 mixed (5%) · 5 negative (9%)
Trust + time weighted: +80%
AI summary — not a quote
An 850W power supply is widely regarded as the 'sweet spot' for high-end gaming builds, providing a balance of efficiency and headroom for modern components. It is frequently recommended for systems featuring RTX 4080 Super, 5070 Ti, or 5080 GPUs, as it handles transient power spikes better than 750W units while remaining more cost-effective than 1000W+ alternatives.
Pros
- Provides sufficient headroom for high-end GPUs like the RTX 5080 and 4080 Super.
- Often features two separate PCIe rails, which is preferable over daisy-chaining cables.
- Minor price difference compared to 750W units while offering better future-proofing.
- Operates near peak efficiency for many modern mid-to-high-end configurations.
Cons
- May be insufficient or 'cutting it close' for flagship cards like the RTX 5090.
- Efficiency loss means the unit can draw significantly more than 850W from the wall at max load.
Top excerpts
For under £900 I managed to get an i7 14700, 32GB 5600MHz Dominator RAM, a Z790 Tomahawk MAG Mobo, Zotac 10GB RTX 3080 AMP Holo GPU, a new DarkFlash DY470 case and 6 case fans, and migrated my 2x 4TB M.2s, Corsair 360mm AIO and 850w Power supply from my old build into this.
I have 5080 and 9800x3d and an EVGA 850w PSU and it works great and uses less power than the previous 12700k and 14600k CPUs I had. As long as the PSU is considered A or S-tier, youre fine with that setup
you can get the 850w version of this psu if u want...
PSU: Go 850W. 750W *technically* works (NVIDIA says minimum) but you're building a $2500 rig. The 4080 Super has transient spikes and having headroom means the fan stays quieter and you're covered for future upgrades . Seasonic Focus is great.
I paired the bundle with a 5070ti and an 850w psu. I feel super confident this set up will last me years, unless someone here tells me otherwise.
Seasonic
55 positive (82%) · 7 mixed (10%) · 5 negative (7%)
Trust + time weighted: +74%
AI summary — not a quote
Seasonic is widely regarded as a "gold standard" manufacturer in the power supply market, frequently recommended for its long-term reliability and industry-leading warranties. Unlike many competitors that rebrand third-party units, Seasonic is a primary manufacturer (OEM), which contributes to its reputation for consistent quality. However, experienced builders emphasize that while the brand is prestigious, users should still evaluate specific models rather than buying on name alone, as the company has produced lower-tier units in the past.
Pros
- Exceptional warranty periods, often ranging from 10 to 12 years.
- High reputation for reliability and protecting expensive components.
- Primary manufacturer (OEM) that designs and builds its own units.
- Generally positive reputation for customer service and RMA processes.
Cons
- Premium pricing compared to other high-quality alternatives.
- Occasional "dud" product lines (e.g., S12iii) that do not meet the brand's typical high standards.
- Small Form Factor (SFX) models may lag behind competitors in adopting the latest PCI-E power standards.
Top excerpts
Some PSUs have claimed to have used thermistors to shutdown in case of bad load. AsRock did it and apparently it's a gimmick and does as much as tits on a boar. SeaSonic promised something but haven't seen it yet.
A quality 850W unit from Seasonic, Corsair or be quiet! would remove all doubt and protect a $600+ GPU investment.
All hail Seasonic.
Whatever size, get a Seasonic. Their individually braided cables makes working with them easy peasy.
Grab a solid 750W Gold PSU from Corsair/Seasonic/MSI