Will the Core i5-14600K bottleneck the RTX 4080?

No. At 1440p the RTX 4080 is the limiting part, which is the normal state for a gaming PC. The Core i5-14600K 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 i5-14600K and RTX 4080?

Sustained gaming load is about 560 W using the RTX 4080's measured draw. A 750 W unit is the safe choice.

Is this pair better at 1080p or 4K?

1080p: CPU-limited 4% (balanced). 1440p: GPU-limited 4% (balanced). 4K: GPU-limited 24% (GPU-bound (normal)).

Core i5-14600K + RTX 4080: bottleneck check

Balanced at 1440p.

CPU GPU

Well matched at 1440p. The RTX 4080 is the slightly busier part, by about 4%.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	CPU	4%	balanced
1440p	GPU	4%	balanced
4K	GPU	24%	GPU-bound (normal)

This is the classic pattern: at 1080p the Core i5-14600K is the limit (4%), while at 4K the RTX 4080 takes over (24% GPU-limited). If you play at 1080p on a high-refresh monitor, a faster CPU is the upgrade that matters; at 1440p or 4K this pair is already well matched.

Specifications

Intel Core i5-14600K
Cores / threads	14 / 20
Max boost	5.3 GHz
Socket	LGA1700
Maximum turbo power (MTP)	181 W Intel's published maximum sustained turbo power, above its base power; the PSU estimate uses it, so it errs high · Intel ARK
Released	2023
Gaming index	80 / 100
Multi-core index	76 / 100

NVIDIA GeForce RTX 4080
VRAM	16 GB
Board power	320 W
Released	2022
1080p index	66.6 / 100
1440p index	62 / 100
4K index	57.7 / 100

Power supply

The RTX 4080 measured 304 W average while gaming (371 W highest 20 ms spike, TechPowerUp). With the Core i5-14600K at its maximum turbo power of 181 W and about 75 W for the rest of the system, the sustained load is about 560 W. A 750 W unit is the safe choice. Details on the RTX 4080 PSU page or try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

LGA1700

Cards that use the Core i5-14600K fully

Best CPU for the RTX 4080 Best GPU for the Core i5-14600K RTX 4080 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.