CORSAIR RM750e vs SF750: the same wattage in different spaces
Compare the exact CP-9020295-NA RM750e and 2024 SF750 for ATX versus SFX installation, cable reach, connectors and safe PSU replacement.
Both are rated at 750W, but the case can decide this comparison before the wattage does. The RM750e is an ATX supply; the 2024 SF750 is SFX. A compact unit is not automatically a better tower upgrade, and a matching output rating does not establish that every GPU cable or workload is supported.
Choose around your situation
CORSAIR RM750e (CP-9020295-NA)
Use the exact RM750e revision when the case accepts ATX and its cable set covers the motherboard, GPU and drives. Check drive-cage and connector clearance around the 140mm body.
CORSAIR SF750 (2024, CP-9020284)
Use the 2024 SF750 when the compact layout needs SFX or its dimensions provide a concrete routing advantage. Check cable reach; this model uses CORSAIR Type 5 cables.
See the difference that needs checking
Published values, not performance scores. Each pair of bars starts at zero and uses the same scale.
Rated capacity is not measured system draw, efficiency or cable compatibility.
Allow extra space for plugs, cable bends and drive cages.
What changes between these exact parts
These are published specifications. The last column explains how they affect the selection; it is not a benchmark result.
Scroll across the table to compare both models and the practical implications.
| Check | CORSAIR RM750e (CP-9020295-NA) | CORSAIR SF750 (2024, CP-9020284) | What it means for your build |
|---|---|---|---|
| Rated output | 750W | 750W | Whole-system demands and GPU manufacturer recommendations still need checking. |
| PSU format | ATX | SFX | Check the chassis mounting plate and any adapter bracket. |
| Body length | 140 mm | 100 mm | Leave room beyond the body for connectors and cable routing. |
| Revision identification | CP-9020295-NA | 2024 · CP-9020284 | An older unit with a similar name may have a different specification and cable set. |
Worked decision: moving a tower into a compact case
A case change can require a new PSU even when the existing unit has adequate output.
Check the new case’s supported PSU formats first. An ATX supply does not become SFX because its wattage matches a compact model.
Lay out the motherboard EPS and GPU cable routes. Confirm the included cable lengths, number of independent leads and connector requirements.
When replacing the supply, remove the old modular cables and install the verified cables for the replacement. Do not reuse a cable solely because the plugs fit.
When to keep what you have
Keep a suitable, reliable existing PSU when the case, cable requirements and system load allow it. Efficiency certification by itself does not demonstrate that replacement will solve noise or stability problems.
Checks still to make
- Exact revision and compatible cable family.
- GPU connector rating, count and seating space.
- Motherboard EPS connections and cable reach.
Check one change with your build
Choose a part to review against your current list. The builder shows any replacement and compatibility checks before you confirm the change.
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See a complete example
Starter lists show component choices and unresolved checks. They are planning examples, not tested complete systems.
Sources and scope
The decision examples are RigAtlas analysis based on the specifications below. We have not benchmarked these parts for this comparison. Manufacturer requirements can change; check the exact model before ordering.