Hi. First of all, I apologize my poor english. I am not good at English.
I have Radeon PRO DUO. It's great VGA, I think.
But after Cold boot, My monitor has no signal and I can't see bios logo.(only black screen)
After one or two power on, off, I can get the signal. Sometimes, the VGA fan spin on full speed with no signal.
Plus, sometimes, Screen stays black after waking computer from sleep mode.
I inspected My PSU and mother board and I turned off the igfx device on bios. but it can't help me.
I will take this vga to RMA, next week. But before RMA, I want to know why this happen.
My system is below
CPU : i7-4790k
M/B : Gigabyte Z97X-UD3H Durable
RAM : 24GB
PSU : superflower sf-1000f14mg
CASE : thermaltech CORE X9
OS : Windows 7 64bit sp1