The pci-e slots are powered by the only 2 (if my memory is correct) 12v wires in the 24 pin connector. So, assume around 200 watts can go into the motherboard through the 24 pin connector, which are then split between fan headers, rgb headers, and possibly 12v to 5v / 3.3v dc-dc converters on the motherboard that may power things like ram, m.2 connectors (m.2 has only 3.3v but because a m.2 SSD may go up to 3A when writing, some motherboards don't use the 3.3v from PSU but use a dc-dc converter to produce clean 3.3v from 12v) video cards don't take all power from the 8 pin connector. They can also take up to around 65w from the SLOT. (officially it's 10w on 3.3v and 65w on 12v but recently I think they loosened the standards to allow up to 75w on 12v) I've just bought an RTX 3080 TI from marketplace and the person gave me his power cable (top) that came with his power supply and I realized it doesn't fit with my power supply since there are different shapes. I used my old power cable for my GTX 1060 6GB, but there's 1 empty hole. I'm not sure what are the difference, but I'm kind of worried that the RTX 3080TI require all 8 holes to function correctly. Do I need to get a new Power Supply for the right pinned cable or why are there differences? I was given the case with power supply from my oncle. It's indeed old. I only found 1 cable with it. WARNING: Due to the electrical pinout of each cable and the unique electrical pinout designed for your power supply, using this cable with a non-certified or unsupported power supply may cause irreparable harm to your power supply, cable, and/or any connected devices. Use of this cable with any non-certified or unsupported EVGA power supplies or power supplies from another manufacture voids the warranty for this cable, and may void the warranty of your power supply. Furthermore, EVGA expressly disclaims any damage caused by or attributed to use of this cable with any power supplies that are not certified for use with this cable.

8-pin EPS12V and PCI-E connectors? Is there a difference between 8-pin EPS12V and PCI-E connectors?

This high quality 8 Pin PCIE extension cable is the best solution for messy and untidy PC systems. Each of the 8 individual wires come sleeved and plugged inside the PCIE connector. This cable comes with two clear cable combs . PCI-e organization imposed the limits of 75 watts for the 6 pin connector, and 150 watts for the 8 pin connector. Some PSU maker could use a different pinout on the PSU, so even if the pinout is standard from the GPU side, it is not from the PSU side. Ah, not mixing cabels from different power supply is a good thing to know. Never though there would be differences.The card will work, however pulling over 8 amps through 18 awg cable is not advisable. The cable/connectors will heat up during longer game sessions. Unfortunatelly it's not true that you cannot connect PCIe 8-pin plug to EPS-12V (EATX) motherboard slot. It might be only an exception found with FSP PSU, but a single difference in one male pin on PCIe connector allows to plug your PSU totally wrong. So in theory, an pci-e 8 pin connector that has 3 pairs of wires carrying 12v to the video card could deliver safely around 9A through each pair. This means you could do up to 12v x 3 pairs x 9A = 324 watts.

Pin, 8-Pin, and GPU Power Connectors - Difference Between 6-Pin, 8-Pin, and

I'm not sure which brand the PCIe cable is, but it's written 18AWG. Do I really need a 16 AWG? If so, I guess i'll have to buy a new Power Supply since I can't seem to find a new cable. If you get a real high end card. using true 6+2 Y cable gives you all the power you need, else the card could throttle to low power mode.

Im trying to connect 3 GPUs with a 125W power limit to the same PSU. The PSU only have one 8-pin connector for what i can see. That is why you could get a 8 pins connector with missing pins, because it is in fact wired as a 6 pins with lower power. The PCI-e limitation of 150 watts is chosen to allow 2 8 pin connectors on a single cable coming from power supply - keep in mind that there's ONE connector plugged into the power supply, usually with 3 or 4 pairs of 12v wires which are then shared between those 2 connectors. So, 2 x 150w max = 300w max, which is within the reasonably safety limits of the connectors on the power supply end (if the power supply is modular) If it doesnt catch on fire then id consider it fine but a setup like this is def risky, if your adapter or psu has thin wires then thats when you should consider swapping out the psu or just getting power from other stuff like molex to 8 pin adapters i can run a 150w gts 250 just fine with molex - sata - 6+2 pin adapter, you can say its gonna catch on fire all you want but unless the cables get really hot and actually pose a risk of catching fire you arent gonne convince me, atm even if i stress it the cables seem to only get w arm, from what i can tell its around low 30c in temp

Cable Matters (2-Pack 6-Pin PCIe to 8-Pin PCIe Adapter Power

Here's a much bigger/better picture of them taken from the computer hardware chart done by Sonic840 on Deviantart ( CC BY-SA) You can't connect male EPS-12V to female PCI-E 8-pin because 1 male pin of EPS is square and its rounded on PCI-E.I have a Antec 850 w - High Current Gamer ATX12V/EPS12V. I had a friend that came by with his Corsair cable and it indeed not fit. It seems that all the bottom pins have a bevel on the bottom and won't accept the square ones. This power supply have 2x 12v connectors. Also, since my new GPU require 2x 8pins, I've also heard that you should use 1 power cable for each 8pins for even power. Is that true? Ryzen 7 3700x | Asus B450-F Strix | 16gb Gskill Flare X 3200mhz | Corsair RM550x PSU | Asus Strix GTX1070 | 250gb 860 Evo m.2