Will the Core i5-12400F 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 i5-12400F has headroom to spare. This is a model estimate from performance indexes, not a measured FPS loss.

What power supply do I need for a Core i5-12400F and GTX 1660 Super?

Sustained gaming load is about 319 W using the GTX 1660 Super's measured draw. A 450 W unit is the safe choice.

Is this pair better at 1080p or 4K?

1080p: GPU-limited 18% (balanced). 1440p: GPU-limited 26% (GPU-bound (normal)). 4K: GPU-limited 43% (CPU overkill).

PCPairs

Core i5-12400F + GTX 1660 Super: bottleneck check

26%

GPU-limited at 1440p. GPU-bound (normal).

CPU GPU

The GTX 1660 Super is the part working hardest at 1440p, which is what you want. The Core i5-12400F keeps about 26% in reserve.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	18%	balanced
1440p	GPU	26%	GPU-bound (normal)
4K	GPU	43%	CPU overkill

The GTX 1660 Super is the limit at every resolution and by a wide margin at 4K (43%). The Core i5-12400F is overkill for this card: a faster GPU would give you far more frames than any CPU change.

Specifications

Intel Core i5-12400F
Cores / threads	6 / 12
Max boost	4.4 GHz
Socket	LGA1700
Maximum turbo power (MTP)	117 W Intel's published maximum sustained turbo power, above its base power; the PSU estimate uses it, so it errs high · Intel ARK
Released	2022
Gaming index	66 / 100
Multi-core index	48 / 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

The GTX 1660 Super measured 127 W average while gaming (140 W highest 20 ms spike, TechPowerUp). With the Core i5-12400F at its maximum turbo power of 117 W and about 75 W for the rest of the system, the sustained load is about 319 W. A 450 W unit is the safe choice. Details on the GTX 1660 Super PSU page or try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

LGA1700

Cards that use the Core i5-12400F fully

Best CPU for the GTX 1660 Super Best GPU for the Core i5-12400F 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.