hello my russian friends

i have a laptop here that its true everywhere,except gpu works
when i run gpu stress test(furmark) it turnes off instantly

i try different windows and drivers
i change cpu,ram,bios
i replace vga chip

but nothing changed

what else can cause this problem?

tnx for ur help

What power supply you using?

i use adjustable 30V,5A power supply
i try with other poer supplies too

its ok in cpu stress test
max use about 2.5A