Dark Rock PX4 CPU Cooler Review: $17 Budget Beast Tested
Surprising Value in Budget Cooling
You're building a PC on a tight budget. Every dollar counts, especially when choosing components that won't throttle your performance. After testing the Dark Rock PX4—a cooler priced lower than most thermal pastes—I discovered something remarkable. This $17 solution defies expectations for budget builds, handling mid-range CPUs with unexpected competence.
The shocker? During gaming sessions with an undervolted Intel 13900K (simulating a 13600K), it maintained temperatures around 84°C max—well below thermal throttling thresholds. While not for overclockers, it delivers exceptional value for cost-conscious builders. Based on my hands-on testing methodology (including real-world gaming benchmarks and Cinebench stress tests), this cooler punches far above its weight class.
Technical Specifications and Build Quality
Core Design and Compatibility
The Dark Rock PX4 features a compact 120mm design (152mm height x 120mm diameter) with four copper heat pipes and an anti-vibration rubber-mounted fan (700-1800 RPM). Surprisingly, it supports modern sockets including:
- Intel LGA 1700/1200/115x
- AMD AM4/AM5
Mounting requires careful attention—the included hardware resembles Be Quiet!'s system but uses thinner fins. During installation, I encountered RAM clearance issues with taller VRM heatsinks. Pro tip: Adjusting the fan clips higher or lower resolves most conflicts, though fins bend easily if mishandled. The cooler's offset design optimally pushes air toward your rear exhaust.
Thermal Interface and Accessories
The package includes:
- Intel/AMD mounting brackets
- Spring-loaded screws
- 1g thermal paste (sufficient for one application)
- Plastic spreader
Critical note: Apply paste carefully—the small tube leaves little room for error. For our test build, coverage on the 13900K's large IHS was adequate but not generous. Performance-oriented users should invest in higher-quality paste, though that alone could double your cooling investment.
Real-World Performance Testing
Methodology and Stress Test Results
Testing methodology involved:
- Baseline Cinebench R23 runs on stock i9-13900K (253W+ power draw)
- Undervolting and power-limiting to simulate i5-13600K (154W TDP)
- Gaming benchmarks (Cyberpunk 2077 at 1080p/1440p)
- Open-air test bench (representing well-ventilated cases)
Stress test findings:
- Stock 13900K hit 100°C instantly in Cinebench, throttling to 5.1GHz (37,909 pts)
- Undervolted "13600K" simulation: 84°C max at 5GHz P-cores/3.7GHz E-cores (22,551 pts)
- Peak power draw: 107W during simulated i5 loads
Gaming Temperature Analysis
| Resolution | Avg. CPU Temp | Max Core Temp | Power Draw |
|---|---|---|---|
| 1080p | 75-82°C | 88°C | 170W |
| 1440p | 70-77°C | 79°C | 130W |
Gaming performance revealed: At 1440p (reducing CPU bottleneck), temperatures dropped significantly. The cooler maintained safe operating ranges even during intensive scenes. Fan noise remained tolerable using a balanced curve—only during stress tests did it approach 22.3dBA.
Value Verdict and Limitations
Who Should Buy This Cooler?
The Dark Rock PX4 excels for:
- Budget builders using i5/Ryzen 5 CPUs
- Office/student PCs with moderate workloads
- Upgrades from stock Intel coolers
Avoid it if you:
- Run uncompromised i7/i9 or Ryzen 7/9 chips
- Overclock or render professionally
- Have poorly ventilated cases
Critical limitation: At $17, it's a steal—but prices may spike post-review. Buy now if this fits your needs. Above $25, competitors like the DeepCool GAMMAXX 400 offer better performance.
Installation Pro Tips
- Fan positioning: Adjust clips to avoid RAM/VRM interference
- Paste application: Use the spreader for even coverage
- Undervolting: Essential for higher-core CPUs (start with -90mV offset)
- Case airflow: Pair with at least one rear exhaust fan
Final Recommendations
For $17, the Dark Rock PX4 delivers unprecedented cooling value. While it can't tame flagship CPUs at stock settings, it handles mid-range processors competently in real-world gaming scenarios.
Builders should note: This cooler's viability hinges entirely on its sub-$20 pricing. At higher price points, alternatives become more compelling. If you're assembling a budget gaming rig today, grab it immediately—but verify your case clearance first.
Experiential question: When building budget systems, what component do you prioritize for upgrades first—cooling, GPU, or storage? Share your strategy below!
