7460 AIO, GeForce 1050, Photoshop CS4, 100% GPU usage

Hi everybody!

I've bought this AIO recently (Dell Optiplex 7460 i7/8gb/256gb ssd/1Tb hdd/gtx1050). Everything looked nice until I installed Photoshop CS4. When I open PS and create a new canvas the fans start to spin faster and it's very noisy. I started to investigate this problem and found that GPU usage of my NVIDIA card is about 30%. No specific operations in PS, just blank canvas (1920x1080 size). If I choose brush tool and start drawing on this canvas the sound of fans increases and the GPU usage raises to 100%. Simple action - drawing with brush and it leads to such GPU overload. I supposed it could be because of something wrong with CS4 Photoshop and Windows 10, but the same thing repeats when I work in Sony Vegas video editor. Even blank project forces the fans to spin crazy.

I tried to update BIOS and graphics card drivers. Also I update chipset drivers. No changes.

So what can it be? Hardware issue or software? What else can I trie before reporting to warranty service?

Thanks in advance!

P.S.

And one more thing. Even if I don't use any program in Win 10 I can hear fans. I read about it in reviews before and was ready for that. But I thought I would hear a sound of air flow like on my previous laptops. But here besides the sound of air flow I hear something like bearings sound, it's not so loud but clear enough and it's annoying a bit. Is it normal for dell fans or probably it's defective fans?