The Dell XPS pre-built system has poor upgradeability due to its proprietary motherboard, power supply, and CPU cooler mountings.

“I would say the main knock against our little XPS that could here, and it's a big one, is that if you want something that not only looks like a gaming computer, but can be easily altered, and upgraded, and tinkered with like a gaming computer, good luck doing anything with this proprietary board”