u/safouenghoul

Build:

The problem:
Across every benchmark I’ve tried, my CPU performs at roughly 17-20% of expected:

Benchmark | My Score | Expected | %
---------------------|------------|------------|-----
Geekbench 6 Single | 687 | ~3,400 | 20%
Geekbench 6 Multi | 3,509 | ~21,000 | 17%
CPU-Z Single | 180 | ~880 | 20%
CPU-Z Multi | 1,390 | ~8,500 | 16%
Cinebench R23 Multi | 3,341 | ~22,000 | 15%
AIDA64 Memory Read | 24.7 GB/s | ~62 GB/s | 40%

Real-world games also feel slow despite 5080. CPU under load clocks correctly to 5.6 GHz, temps stay around 50°C, all 8 cores at 100% during multi-thread runs. Effective clocks under load match core clocks (~5.0 GHz average), so it’s not a throttling issue.

Geekbench result: https://browser.geekbench.com/v6/cpu/17922911

• Loaded Optimized Defaults, then enabled EXPO only
• Disabled Memory Integrity / VBS
• Disabled hypervisor (bcdedit /set hypervisorlaunchtype off, removed Hyper-V/VMP/HypervisorPlatform features)
• Disabled ECO Mode in BIOS (was on by default — improved nothing)
• Reverted earlier core parking regedit tweaks
• Reset Windows power plans (powercfg -restoredefaultschemes), set to Balanced
• Tried disabling background processes, antivirus, etc.
• Confirmed no thermal throttling, no power limit hits

Has anyone seen this exact pattern? CPU clocks fine, temps fine, all settings look correct, but performance is dramatically deficient across multiple unrelated benchmarks. About to start the RMA process but wanted to ask the hive mind first in case I’m missing something obvious.

Edit :

I ran some Cinebench R23 and with Hwinfo I can see that HTC and PROCHOT EXT are always on and seems like they are holding the CPU. This may explain why I’m not getting full power.

Edit 2 :

I can confirm it’s the VRM HTC that is throttling the CPU. Disabling it from the bios unlocks the full power. Now I’m not comfortable leaving it disabled. So I will look into the mother board or send the whole build back.

Thanks!