If you have a standard ATX PC case, chances are an ATX power supply will fit. Please look at our GPU Benchmarks and CPU Benchmarks hierarchy to find the best parts for your system.Ĭheck the physical dimensions of your case before buying. If you add the increased power demands of modern high-end CPUs, you can quickly figure out why strong PSUs are necessary again. This way, short power spikes from the graphics card are addressed without shutting down the system. The first triggers at lower loads, in the millisecond range, while the latter triggers at higher loads that last for some nanoseconds. This is why EVGA offers two different OPP features in its G6 and P6 units, called firmware and hardware OPP. If the PSU's over current and over power protection features are conservatively set, the PSU can shut down once the graphics card asks for increased power, even for very short periods ( nanoseconds range). What troubles today's power supplies is not the maximum sustained power consumption of a GPU but its power spikes, and this is why various manufacturers suggest strong PSUs for high-end graphics cards. You should also add the up to 75W that the PCIe slot can provide in these numbers. Currently, a pair of PCIe 6+2 pin connectors, on dedicated cables, are officially rated up to 300W and three of these connectors can deliver up to 450W safely. This is why the latest 12+4 pin connector that the upcoming generation graphics card will use will provide up to 600 W of power. You can find a few below:Īlthough new generation GPUs are more power-efficient than previous generations, their power consumption continues to increase. Several power supply sellers have calculators that will give you a rough estimate of your system's power needs. You can calculate roughly how much power your new or upgraded system will draw from the wall and look for a capacity point that satisfies your demands. You don't need to purchase much more potential power capacity (wattage) than you’ll ever use. Quick Power Supply Shopping Tipsįirst, figure out your wattage requirements. We’ll help you find the best power supply for your next desktop PC below. You'll also have different concerns, of course, depending on whether your power supply will be pushing a monster mining rig, an always-churning workstation, or a basic productivity or gaming PC.