Before you start bashing your 450W power supply, saying it can't handle the load, why don't you plug it into a power meter and measure the power it draws so you can actually make a real statement about the system, rather than false conjecture? I bet your low end overclocked system ran barely over 325W at load. Still, an interesting read.
Tomshardware has been known to make fasle statements based on conjecture and myth. Well, this is a really easy one to fix. Measure the damn power usage and actually prove your statement. If you do that with every assumption you make, Tomshardware may be able to gain its reputation back.