Power supply · MODEL NOTES
Seasonic FOCUS GX-850 ATX 3.1 v5
An 850 W short-body option, provided the cable plan is verified
FOCUS GX-850 ATX 3.1 v5 combines an 850 W capacity choice with a compact ATX enclosure. It is worth comparing against RM850e for depth and RM850x for documented conventional-cable inventory. The purchase should follow the actual graphics-card wiring needs; the presence of a native 12V-2x6 cable does not settle every possible card or adapter arrangement.
Consider it when
- An 850 W-class tower whose v5 cable contents and required routing have been confirmed.
Look again when
- The seller cannot identify the revision or the build relies on unresolved connector totals.
THE SPACE IT NEEDS
Leave room beyond the PSU body
- PSU body length
- 140mm
The body length excludes the working space needed for plugs and cable bends. Drive cages and the case layout can reduce that space.
Check power and cable requirements ↗Based on the manufacturer specification record, checked . Check the exact revision and installation instructions before buying.
The checks that can change your choice
Two independent 8-pin runs are documented, not a complete simultaneous total
The catalog establishes two single-connector PCIe cables but leaves the additional dual cable’s PSU-side use unresolved. Its native 16-pin wattage also requires exact-model confirmation. Keep those unknowns visible and check the v5 package instead of borrowing the inventory from a 2019 or v4 FOCUS model.
Check the whole power path
Compare the CPU and exact graphics card requirements with the PSU capacity and included connector arrangement. Count independent cable runs where the GPU manual requires them. Use only cables approved for this exact power supply; similar-looking modular plugs do not establish compatible wiring.
Published specifications
850 W fully modular ATX PSU; ATX 3.1 / PCIe 5.1; v5 revision; native dual-color 12V-2x6; 140 mm depth; 80 PLUS Gold.
| Brand | Seasonic |
|---|---|
| Exact model | FOCUS GX-850 ATX 3.1 v5 |
| Manufacturer model number | FOCUS GX-850 ATX 3.1 v5 |
| Hardware revision | v5 |
| Form factor | ATX |
| PSU rated output | 850 W |
| PSU body length | 140 mm; cable connectors need additional space |
| Verified independent PCIe cable minimum | 2 cable(s); additional unverified cable paths are not counted |
| Native 16-pin GPU cable | 1 supplied connection(s) · 12V-2x6; use the exact model’s supplied cables |
| CPU EPS 8-pin ends | 2 |
| Independent EPS cables | 2 |
| SATA power connectors | 8 |
| SATA power cables | 2 |
Explicit v5 model, not 2019 FOCUS GX or 2024 v4. Manufacturer cable table lists 2 single-connector PCIe cables plus one cable with two PCIe connectors. The PSU-side connection and simultaneously available 8-pin capacity of that dual cable were not established, so automatic connector totals remain unknown. Native 16-pin wattage also requires confirmation.
A different choice worth checking
These alternatives address related choices. Recheck their platform, connections and fit before treating one as a replacement.
Follow the check that matters to your build
Sources and review notes
RigAtlas connects manufacturer specifications to component choices. This page is document-based analysis; it does not claim a hands-on test or a current store offer.
- Seasonic — exact model specificationsEvidence checked
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