Question about Phanteks Evolv X2

For the Phanteks Evolv X2 case, you can use an ATX power supply. The case supports power supplies up to 250 mm in length, which is typical for most ATX power supplies. SFX power supplies are generally smaller and can also fit, but they might require additional mounting hardware, which is not specifically mentioned for this case. Therefore, an ATX power supply is the most straightforward choice.