i5 4690k OC with 550w
i5 4690k OC with 550w
Your GPU consumes significant power, reaching up to 375W thanks to its dual 8-pin PCIE connectors. The i5-4690K has a TDP of 88W and is not overclocked. Increasing the CPU frequency to 4.8GHz could raise your consumption to around 30W above TDP, bringing the total to approximately 120W. Your RAM and SSD together might use about 10W, while the HDD draws roughly 30W during startup. The fans, assuming three units including an AIO model, could add up to 20W.
This adds up to a potential power draw of 555W (or around 46A) at the +12V rail. Your PSU should be capable, offering up to 540W (45A) on the same rail. However, based on these estimates, you would be operating the PSU near its maximum capacity.
Your GPU consumes a significant amount of power, reaching up to 375W thanks to its two 8-pin PCIE connectors. The i5-4690K has a TDP of 88W without overclocking. Increasing the CPU frequency to 4.8GHz could raise your power consumption to around 30W above TDP, bringing the total to approximately 120W. Your two DDR3 RAM modules and SSD together would use about 10W. The HDD might draw roughly 30W during startup. With three fans (including an AIO model), you could expect up to 20W.
This adds up to a potential power draw of 555W (or around 46A) at the +12V rail. Your PSU, if it's a reputable brand, can supply up to 540W (45A) on the same rail. However, based on these estimates, you'd be pushing your PSU close to its capacity—or possibly exceeding it.
For a setup around an R9 390, a 650W PSU is advisable. But precise figures depend on detailed calculations; a solid ~600W or 650W PSU would suffice for overclocking the CPU while keeping your current GPU in mind.
The R9 390 performs well, but a 750-watt power supply would be more suitable. Adding an extra 100 watts for room usage means the PSU fan won't need to run as hard continuously.