Is There Any Way To Test If A CPU Is Working Properly..?

[snowdog1971]

I've just built myself a new rig:

Intel i7 6700K
Asus Maximus Ranger VIII
16GB of DDR4

When I first started it up it POSTed fine but when the display appeared it was in the top half of my telly screen only with the bottom part being black. It's basically showing the whole screen squished into half the space.

My original plan was to use the iGPU until I can afford to get a meaty GPU in May next year.

Have bunged my old 4870 into it and it shows the whole screen area.

But is there any way of determining if my CPU is at fault or my motherboard..? Or if it's only the iGPU that's not working..?

Thanks in advance for any help!

 

[snowdog1971]

Forgot to say that I did that and Windows was appearing squished into half the screen too.

When Windows 8 started the resolution was set at 800x600 and wouldn't go any higher. The info button on my telly remote showed that my telly display was 1080i.

There must be an equivalent of Memtest for CPUs, surely..?

Edit: Well that was weird. I went into the BIOS, had a look at the GPU settings and changed it from Auto to iGPU. Pressed F10 and when it reset the screen was halved still. Windows was halved, I started to swear and it went full screen lol

A bit weird, you would have thought that it would go to the iGPU setting automatically if there isn't a discrete GPU installed. Very odd. Oh well, it's sorted out now!