Performance drops when the system is under stress
Performance drops when the system is under stress
I recall Gigabyte introduced the GA-970A-UD3P. It featured an 8+2 phase VRM on a cost-effective chipset board. I connected it with my FX-8350 and an ASUS Crosshair V Formula (non-Z). Now it sits unused, though still visible... but in plain sight. The notorious MSi 970A Krait YouTube clip surfaces. The fire incident was memorable. It had a 4-phase VRM paired with the FX-9590. Another model was the MSi 970A-G41 / -G43. Upon its release, it advertised support for FX-8350 and FX-8370. After customer complaints about VRM problems, they updated the supported CPUs. Now high-wattage chips are excluded, and E-based versions are included (e.g., FX-8320E, FX-8370E). What bothers me most is how many boards reuse the 760G chipset from AM2+ era and install an AM3+ socket. They retained the outdated 3+1 or 4+1 VRM layout, claiming support for FX-8000 series. These units were never meant for AM3+ sockets, nor for 125W/140W+ processors. They launched before AM3+ existed at all.
Owned a 790FX-GD70 that collapsed after running with an 1100T chip—stock condition included. The power phase was weak, and they opted for low-cost parts (Nikos) which affected performance. Their claim of supporting the chip seemed to be just to get it running; once it worked, they stopped further improvements. In contrast, a 870FX-G54 performed better even under extreme conditions, showing noticeable voltage drops. With BIOS set to 2.1V, it displayed around 1.85V under load, and the board lasted until I destroyed it. Since then, things have improved, especially with a newer x570 MEG ACE that handles higher speeds and RAM better than any AM4 board I own. The original poster can try one of the boards I recommended.
The interesting part is the FX-9590 had 220w and AMD suggested liquid cooling, which was spot on. They were completely accurate. Intel is similar in terms of heat management right now. However, they underestimated the P-state wattage significantly—while the CPU runs well above 125w during boosts. After user adjustments, it often exceeds 300w. (Modern Intel) You can reduce VRM strain by shutting down cores. For extreme overclocks, you might get similar performance with just 2 or 3 cores running. Surprisingly, at 2.0v and 2 cores at 7ghz, the current draw isn't much higher than with 8 cores at 5ghz (as seen in FX processors). I enjoyed upgrading from $50 motherboards to $250 boards. That's just my experience. I'm budget-conscious and not super rich, lol.
It used to really bother me at board manufacturers because I kept seeing 700/800 chipsets that supported FX8 updates, while FX6-FX8 throttling was common. Forum members often complained about performance issues, and some boards were marketed as working well despite these problems. It’s possible certain resellers would update BIOS just to clear out older inventory.
It was a major setback, but it’s reassuring that the PC building community recognized the need for proper VRM design. This awareness has led manufacturers to adopt better practices, such as Asrock’s recent adjustments for their B550 series due to poor VRM setup and cooling performance.