27UK850-W Monitor
IPS · 27" · 4K · 60Hz · 5ms
MSRP
LG C4 42" OLED
W-OLED · 42" · 4K · 144Hz · 0.1ms · Dolby Vision
MSRP
Our verdict
The LG C4 42" OLED takes the performance lead with a 28% higher overall score, driven by its more shader cores, more of memory, and higher TFLOPS of compute power. In gaming benchmarks at 1440p, it delivers roughly 0% more frames per second across demanding titles like Cyberpunk 2077 and Alan Wake 2.
However, the 27UK850-W Monitor tells a compelling value story. At $350 versus the LG C4 42" OLED's $800 price tag, it costs 129% less while delivering performance that's only 28% behind. Its of memory is still more than enough for 1440p and even 4K gaming in most titles.
Our recommendation: for the majority of gamers targeting 1440p or even 4K with upscaling enabled, the 27UK850-W Monitor is the smarter purchase. The LG C4 42" OLED only makes sense if you need the absolute maximum performance for native 4K ray tracing, professional 3D rendering, or AI workloads where the extra VRAM and compute power provide a tangible advantage.
Performance winner
LG C4 42" OLED
28% faster overall
Best value for money
27UK850-W Monitor
5% better value per dollar
27UK850-W Monitor best for
Power efficiency
5% better value per dollar
Connectivity
Display
Image Quality
Performance
Physical
Frequently asked questions
Is the LG C4 42" OLED worth $450 more than the 27UK850-W Monitor?
It depends on your needs. The LG C4 42" OLED scores 82 overall vs 64 for the 27UK850-W Monitor. If you need the extra performance for demanding tasks, the premium is justified. For most users gaming at 1440p or below, the 27UK850-W Monitor offers better value.
Which GPU is better for 1440p gaming, the 27UK850-W Monitor or LG C4 42" OLED?
The LG C4 42" OLED delivers higher frame rates at 1440p, but both GPUs handle 1440p gaming well. The LG C4 42" OLED provides more headroom for ray tracing and future titles, while the 27UK850-W Monitor still maintains smooth gameplay in current games.
Can the 27UK850-W Monitor handle 4K gaming?
The 27UK850-W Monitor can handle 4K gaming in less demanding titles and with upscaling technologies like DLSS or FSR. For native 4K at ultra settings in demanding games, the LG C4 42" OLED is the better choice with its higher performance ceiling.
Which should I buy, the 27UK850-W Monitor or LG C4 42" OLED?
Choose the 27UK850-W Monitor if you want the best value for money and primarily game at 1080p or 1440p. Choose the LG C4 42" OLED if you need maximum performance, play at 4K, or do professional workloads like video editing and 3D rendering.
Related comparisons
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Score 64 VS 65
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LG C4 42" OLED VS S3225QC Monitor
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LG C4 42" OLED VS ProArt PA279CRV Monitor
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LG C4 42" OLED VS S2725DS Monitor
Score 82 VS 60