Will the Ryzen 5 5600 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 Ryzen 5 5600 has headroom to spare.

What power supply do I need for a Ryzen 5 5600 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 10% (balanced). 1440p: GPU-limited 18% (balanced). 4K: GPU-limited 38% (GPU-bound (normal)).

PCPairs

Ryzen 5 5600 + GTX 1660 Super: bottleneck check

18%

Balanced at 1440p.

CPU GPU

Well matched at 1440p. The GTX 1660 Super is the slightly busier part, by about 18%.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	10%	balanced
1440p	GPU	18%	balanced
4K	GPU	38%	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

AMD Ryzen 5 5600
Cores / threads	6 / 12
Max boost	4.4 GHz
Socket	AM4
Max turbo power	65 W
Released	2022
Gaming index	60 / 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

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

AM4

Cards that use the Ryzen 5 5600 fully

Best CPU for the GTX 1660 Super Best GPU for the Ryzen 5 5600 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.