Board analysis and power supply
Of course, they have saved even more on the circuit board and it is much simpler than the RX 6600 XT and RX 6700 XT. Well equalized hotspots are rather a foreign word and the distance between voltage converters and BGA gets quite hot. But I’ll have the infrared analysis later and it’s not the fan conversion, but the layout as such. They also did without an LC filter (low pass) to isolate the spikes in the direction of the power supply and only used longitudinal coils (chokes). With a 35217 from International Rectifier XFX relies on a rather average PWM controller, which drives the 5 phases for VDDC_GFX of the RX 6600 and generates the phase for VDDCR_SOC.
The quite cheap DrMOS NCP302045 from ON Semi (45 Amps max.) do not offer a real MOSFET DCR, but at least a temperature protection circuit and a readout output. By the way, they are used for all controllers except VDD_MEM and VDDCI_MEM, where discrete MOSFET pairs with an M3092 and M3098 are used for the high and low side, respectively. The voltage range for VDDC_GFX is between 0.7 and maximum 1.2 Volt, whereby the maximum value can never be exceeded by the end user without special firmware and software. You can leave it that way for now, even if it is a reach on the cheap shelf.
In parallel, an NCP 81022N from On Semi is used for the generation of other partial voltages such as VDD_MEM and a phase for VDDCI_MEM, resulting in a total of 8 phases for the various main voltages. For input smoothing one coil each with 190 mH is used for the 8-pin and the PEG motherboard slot. You can also see the four 2GB GDDR6 memory modules with the 14Gbps from SK Hynix. That’s about as exciting as it gets.
Here is an overview of the most important components:
- 1 - Introduction and Overview
- 2 - Test System and Methods
- 3 - Teardown: Cooler, Fand and the Frankenstein Mod
- 4 - Teardown: PCB Analysis and Components
- 5 - Gaming Performance in Full-HD
- 6 - Details: Frames per Second (Curve)
- 7 - Details: Percentiles (Curve)
- 8 - Details: Frame Times (Bar)
- 9 - Details: Frame Times (Curves)
- 10 - Details: Variances (Bar)
- 11 - Power Consumtion of all Single Games and Efficiency
- 12 - Power Consumtion in Detail and different Applications
- 13 - Transients and PSU Recommendation
- 14 - Temperatures, Infrared Analysis and Fans (Noise)
- 15 - Summary and Conclusion
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