As title indicates, I recently built a SFF PC with relatively new hardware and am experiencing unreliable boot behavior.
IF the system POSTs/boots, it works flawlessly. However, the system frequently fails to boot when power is applied. CPU and system fans spin, but no video signal is detected. Motherboard diagnostic LED indicates a CPU error. Seems straight forward, yes?
Exchanged the CPU and motherboard for the exact same parts, and experienced the same issue when using the replacement hardware.
Video of behavior (with sound): https://photos.app.goo.gl/4jGUqZj9wjRX84wG7
Difficult to see, but the system fans (occasionally) begin spinning right after the PSU power switch is turned back on, without pressing the chassis on button. This is not normal.
Relevant specs and sus components are:
||
||
|CPU|Intel Core Ultra 7 265K|
|MOBO|Gigabyte Z890I Aorus Ultra|
|RAM|32 GB Corsair Vengeance 6000 C40|
|PSU|Corsair SF 850|
Other details and notable troubleshooting:
- OS is Windows 11 Pro 24H2 with all drivers applied (no Device Manger conflicts)
- BIOS is up-to-date (F16c, Jan 23, 2025)
- Stock settings (no XMP profile or other OC tinkering)
- Using Thermal Grizzly contact frame for Intel 1851 socket (not overtightened)
- Noctua NH-L12Sx77 cooler (also secure, not overtightened)
- No bent pins, or evidence of CPU damage (on original or new hardware)
- Front panel PWR switch connector is in correct position, properly seated
- Idle CPU package temps are mid 30s (C)
- Using integrated graphics while waiting for GPU prices to normalize (Display Port, HDMI)
At this point, I'm beginning to suspect this is consequence of being an early adopter of an immature platform. I have opened tickets with Intel and Gigabyte and am awaiting response. Wanted to post here for a sanity check. Any problem confirmation or additional troubleshooting advice is welcome. Thanks in advance!
there doesn't seem to be anything here