No, undervolting won't make the Ryzen 7 3800X reach 3700X performance while keeping the same TDP and power use.
No, undervolting won't make the Ryzen 7 3800X reach 3700X performance while keeping the same TDP and power use.
No, undervolting won't make the Ryzen 7 3800X achieve 3700X performance while keeping the same TDP and power use.
Focus on your CPU voltage and frequency. You'll notice a point where gains slow down and you need more voltage as MHz rise. Try setting your frequency and voltage just below that threshold. Your E8400 works at 1.28V and 4.25GHz on the G31 S2C, but your RAM might be limiting performance, so check if you're still in the diminishing returns area.