Can I boot into BIOS without GPU?

No you cannot change BIOS settings without a functional video adapter. Check if your motherboard has on board video output. For access to BIOS, you can use the cheapest video adapter you can find that fits in the slot on motherboard.

What happens if your RAM goes bad?

Random Access Memory (RAM) wears out over time. If your PC frequently freezes, reboots, or brings up a BSOD (Blue Screen Of Death), bad RAM just might be the problem. Corrupt files can be another sign of bad RAM, especially when the corruption is found in files that you’ve used recently.

How do I know if my RAM is faulty?

Common Symptoms and Diagnosing Bad Computer Memory (RAM)Bluescreens (bluescreen of death)Random crashes or reboots.Crashing during heavy memory use tasks, such as gaming, Photoshop etc.Distorted graphics on your computer screen.Failure to boot (or turn on), and/or repeated long beeps.Memory errors appear on screen.Computer appears to boot, but screen remains blank.