Arria 10 GX - Problem with PCIe and 2 transceivers (1250Mbps SFP)

Hi,

>> The freeze means your host cannot boot successfully? Linux or Windows?

General: Linux, ComExpress-PC*, power consumption (idle) without a PCIe card: 12V @ 0.80A = 9.6W
FPGA: 10AX066H2F34E2SG

Setup #1: FPGA PCIe card inserted
-- Large FPGA image (a lot of active components)
-- Gen1:x4, Interface 64 bit, 125 MHz, native endpoint
-- 2 SFPs (2 transceiver pairs)
-- Total consumption: 12V @ 2.15A = 25.92W
-- FPGA PCIe card consumption: 12V @ 1.35A = 16.2W
-- Result:
-- PC tries to boot second time then goes into some weird "sleep" mode, network traffic stopped, blank screen
-- FPGA PCIe card: Both SFPs still work (transceivers work, my network switch receives packages)

Setup #2: FPGA PCIe card inserted
-- Small FPGA image (removed a lot of components)
-- Gen1:x4, Interface 64 bit, 125 MHz, native endpoint
-- 1 SFP (1 transceiver pairs) !!!
-- Total consumption: 12V @ 1.98A = 23.76W
-- FPGA PCIe card consumption: 12V @ 1,18A = 14.16W
-- Result:
-- PC boots, SFP works, PCIe works, ...

Setup #3: FPGA PCIe card inserted
-- Small FPGA image (removed a lot of components)
-- Gen1:x4, Interface 64 bit, 125 MHz, native endpoint
-- 2 SFPs (2 transceiver pairs)
-- Total consumption: 12V @ 1.99A = 23.88W
-- FPGA PCIe card consumption: 12V @ 1.19A = 14.28W
-- Result:
-- PC boots, SFP works, PCIe does NOT work (not even listed by lspci), ...

>> This happens when you program the sof to the FPGA?

What exactly should I test here? Programming during the boot phase or when the OS is already running?

I don't know if this is important, but we are using the MT25QU512 flash chip (ASx4 mode).

* Also tested this with a normal Dell consumer PC, same behavior.

Edit: I have attached a picture of the device.