Will the Core i5-11400F bottleneck the GTX 1660 Super?

No. At 1440p the GTX 1660 Super is the limiting part, which is the normal state for a gaming PC. The Core i5-11400F has headroom to spare.

What power supply do I need for a Core i5-11400F and GTX 1660 Super?

Estimated system load is about 290 W. A quality 450 W unit leaves roughly 30% headroom for transient spikes.

Is this pair better at 1080p or 4K?

1080p: GPU-limited 3% (balanced). 1440p: GPU-limited 12% (balanced). 4K: GPU-limited 33% (GPU-bound (normal)).

PCPairs

Core i5-11400F + GTX 1660 Super: bottleneck check

12%

Balanced at 1440p.

CPU GPU

Well matched at 1440p. The GTX 1660 Super is the slightly busier part, by about 12%.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	3%	balanced
1440p	GPU	12%	balanced
4K	GPU	33%	GPU-bound (normal)

The GTX 1660 Super is the limiting part at every resolution, which is the healthy direction, and the gap is small enough that neither part is wasted. Upgrade the GPU first when you want more frames.

Specifications

Intel Core i5-11400F
Cores / threads	6 / 12
Max boost	4.4 GHz
Socket	LGA1200
Max turbo power	65 W
Released	2021
Gaming index	56 / 100
Multi-core index	42 / 100

NVIDIA GeForce GTX 1660 Super
VRAM	6 GB
Board power	125 W
Released	2019
1080p index	19.9 / 100
1440p index	15 / 100
4K index	11.3 / 100

Power supply

CPU 65 W + GPU 125 W + about 100 W for motherboard, memory, storage and fans gives an estimated peak load of 290 W. We recommend a 450 W unit (80 Plus Gold or better) so transient spikes from the graphics card stay inside the PSU's comfort zone. Try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

LGA1200

Cards that use the Core i5-11400F fully

Best CPU for the GTX 1660 Super Best GPU for the Core i5-11400F GTX 1660 Super PSU requirements

Same CPU, other cards

All

Same card, other CPUs

All

Indexes are relative estimates aggregated from published reviews; real results vary by game, settings, memory speed and drivers. Methodology.