Live2Ride, minimum recommended power supply for this motherboard is 460 W, you can check that information on the TPS of the motherboard Page 56 Intel� Desktop Board DH87RL — Technical product specification
I would recommend you perform some basic troubleshooting in order to find out what is causing the freeze, but it will be a good idea to change the power supply for a bigger one.
- Test the system out of the chassis, minimal configuration please. (Motherboard, processor, power supply and 1 memory stick.
Start adding one component at the time until you find the conflicting one.
Swap components to narrow the issue if possible.
Please check which BIOS version is installed. Check if you need to update it.