About this guide
The Core i7-7700K itself only needs a modest amount of power — it’s your graphics card, not the CPU, that decides how big a power supply you actually need. A 650W 80+ Gold unit comfortably covers a 7700K paired with anything up to a mid-range current GPU, and 750W gives headroom for a higher-end card or future upgrade without overspending on capacity you’ll never use. Every unit below is fully modular and 80+ Gold or better, so you’re not paying for a mystery-brand PSU that skimps on protection circuitry.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.
The picks, in detail
Corsair RM750x
Corsair's long-running mainstream Gold PSU, now in its current ATX 3.1/PCIe 5.1-compliant revision — a safe, well-reviewed default pick for a 7700K build.
- 750W, 80+ Gold certified
- Fully modular cables
- Zero-RPM fan mode at low loads
- 105°C-rated Japanese capacitors
- 10-year warranty
- One of the most widely reviewed and recommended PSUs in this class
- Long 10-year warranty backed by a major brand
- Not the cheapest 750W Gold unit on this list
- More capacity than a 7700K + mid-range GPU strictly needs
Corsair RM750e
The budget-tier sibling to the RM750x above, trimming a few premium touches to hit a lower price while keeping the same Gold efficiency and fully modular design.
- 750W, 80+ Gold certified
- Fully modular
- 105°C-rated capacitors
- Modern Standby support
- 10-year warranty
- Noticeably cheaper than the RM750x while sharing the same core Gold-efficiency engineering
- Same 10-year warranty as Corsair’s premium RM-x line
- Less refined cable sleeving and finish than the RM750x
- Fewer premium touches like a fanless low-load mode on some revisions
Seasonic Focus GX-750
Seasonic builds PSUs for several other brands on this list under contract, and the Focus GX-750 is their own-branded version of that same engineering at a competitive price.
- 750W, 80+ Gold certified
- Fully modular
- Fanless mode at low loads
- Premium Japanese capacitors
- 10-year warranty
- Seasonic’s OEM reputation without paying a third-party brand markup
- Consistently rated among the quieter units in this class
- Compact case size means a slightly denser cable bundle than some competitors
- Availability varies by retailer
EVGA SuperNOVA 750 G6
EVGA's current G6-series Gold unit, a compact 140mm-deep design that's an easy fit even in smaller mid-tower cases housing a 7700K build.
- 750W, 80+ Gold certified
- Fully modular
- Eco Mode fanless operation with FDB fan
- Compact 140mm chassis depth
- 10-year warranty
- Includes a Power ON self-tester
- Compact size is a real advantage in smaller cases
- Includes a standalone self-test tool most competitors don’t
- Typically priced a bit above the Seasonic and XPG units here
- Slightly less common in North American retail than Corsair or EVGA’s own older G3/G5 lines
be quiet! Straight Power 12 750W
be quiet!'s premium 80+ Platinum-rated unit, for a 7700K build where near-silent operation and top-tier efficiency matter more than shaving a few dollars off the price.
- 750W, 80+ Platinum certified
- Fully modular, ATX 3.0 with a native 12VHPWR connector
- Japanese 105°C capacitors
- Very low fan-noise rating
- 10-year warranty
- Platinum efficiency beats every Gold-rated unit on this list
- be quiet!’s fans are consistently rated among the quietest in independent reviews
- The most expensive unit in this roundup
- Platinum efficiency is overkill if electricity cost isn’t a priority
be quiet! Pure Power 12 M 750W
The value-tier sibling to the Straight Power 12 — same brand's quiet-fan engineering, dialed back to Gold efficiency at a lower price.
- 750W, 80+ Gold certified
- Fully modular
- ATX 3.1/PCIe 5.1 support
- Silent 120mm fan
- 10-year warranty
- Brings be quiet!’s quiet-operation reputation to a lower price point than the Straight Power line
- Full ATX 3.1/PCIe 5.1 spec despite the lower price
- Gold, not Platinum, efficiency — the Straight Power 12 above is the step-up if efficiency matters more
- Newer product line with a shorter retail track record than Corsair or Seasonic
MSI MAG A750GL PCIE5
MSI's compact Gold-certified unit with a native dual-color 12V-2×6 GPU cable, a solid budget pick if you're also buying an MSI motherboard or case for the same build.
- 750W, 80+ Gold certified
- Fully modular
- ATX 3.1/PCIe 5.1 ready with native 12V-2×6 cable
- Compact chassis size
- 10-year warranty
- Among the cheapest Gold-certified, fully modular 750W units from a major motherboard brand
- Native modern GPU power connector avoids needing an adapter
- MSI’s PSU line has less independent long-term reliability data than Corsair or Seasonic
- Fewer premium acoustic features than the be quiet! or Seasonic options
ASUS TUF Gaming 750W Gold
ASUS's military-grade-component Gold unit, a natural pairing if the rest of your build is already TUF Gaming-branded.
- 750W, 80+ Gold certified
- Fully modular
- ATX 3.0 compatible
- Military-grade components, dual ball bearing axial-tech fan
- 10-year warranty
- Matches ASUS TUF Gaming aesthetic for a themed build
- Military-grade component spec is a genuine durability-focused design choice, not just marketing language
- Historically priced a bit above the MSI and Corsair RM750e budget-tier units for similar core specs
- Availability has been inconsistent directly through ASUS’s own store
NZXT C750 Gold
NZXT's own-branded 750W Gold unit, a straightforward fit for anyone already buying an NZXT case or cooler for the same build.
- 750W, 80+ Gold certified
- Fully modular
- Hybrid silent fan control
- Fluid dynamic bearing fan
- 10-year warranty
- Matches NZXT’s white or black case color schemes if that matters to your build
- Competitive pricing against Corsair and EVGA in the same tier
- NZXT PSUs see less independent teardown/review coverage than Corsair or Seasonic
- Sleeved cable set is less flexible than some premium competitors
Cooler Master MWE Gold V2 750W
One of the cheapest fully-modular 750W Gold units from a recognized brand, a sensible pick if the build's budget is going toward the GPU instead of the PSU.
- 750W, 80+ Gold certified
- Fully modular
- Semi-fanless low-noise design
- Dual EPS connectors
- 5-year warranty
- Consistently the lowest price of any Gold-certified unit in this roundup
- Semi-fanless mode keeps idle noise low despite the budget price
- 5-year warranty is shorter than the 10-year terms most competitors here offer
- Fewer premium touches (cable sleeving, self-test button) than the pricier options
What each one costs
Typical price, cheapest first. Tap a name to jump to that pick and its buy link.
Compare any three
| Corsair RM750x | Corsair RM750e | Seasonic Focus GX-750 | |
|---|---|---|---|
| Price | $110-$135 | $85-$105 | $105-$125 |
| Key features |
|
|
|
| Pros |
|
|
|
| Cons |
|
|
|
Buying tips
- The 7700K itself draws well under 100W even overclocked — your GPU choice, not the CPU, should drive whether you pick 650W or 750W.
- Stick to 80+ Gold certification or better; the efficiency difference over a Bronze unit adds up in heat and noise, not just electricity cost.
- Fully modular cabling makes a real difference in airflow and cable management in smaller cases — worth the small price premium over a non-modular unit if your case is tight.
- A 10-year warranty (Corsair, Seasonic, EVGA, be quiet!, MSI, ASUS, NZXT) is standard at this tier; treat a PSU with a noticeably shorter warranty as a signal to check independent reviews before buying.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.