Hey everyone! I've built my own PC before, but I'm stumped on the PCIe connections this time. My power supply has two connections: one goes to the iCue link hub/CPU cooler, and the other will feed my GPU. However, my motherboard also needs a connection, and I'm not sure how to manage this. PC Parts Picker shows that I need to connect the EPS_1 (8-pin) to the motherboard alongside the ATX24_1, but my power supply doesn't seem to have that EPS_1 connection. Am I misreading Corsair's instructions? Should the PCIe cable that's dedicated to the Link/CPU Cooler also be used to power the motherboard? Any help would be super appreciated!
3 Answers
You’re reading the instructions correctly! It sounds like your power supply just doesn't have enough PCIe outlets to power your GPU, motherboard, and the hub all at once. It’s a common issue with certain models, especially if you’re not using a high-wattage power supply. Don’t solely trust PC Parts Picker; it’s a good tool but may not cover every aspect!
If I'm following along right, you should have:
- A 6+2 for the GPU (with 6-pin and 8-pin options)
- A 4+4 for the CPU (4 pins for the standard CPU power + 4 additional for overclocking if needed)
- Possibly an extra 6+2 for a secondary GPU (but lower wattage PSUs under 600W don't typically include this).
The CPU can run on just one 4-pin line, and having two is for overclocking. That should free up a 12V rail for your cooler as well!
The top left connector on your motherboard is for CPU power, and you can't use the same PCIe/VGA cables for that because the pinouts are different. You’ll need a separate 4-pin or 8-pin connector for your CPU from the power supply. Just double-check that you have the right cables for each purpose!
I get that, but do I even have enough ports on my power supply for everything? It shows there's enough, but it's pretty confusing!
Ugh, that’s exactly what I feared. Guess I need to rethink my power supply situation!