- Jan 7, 2022
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Hi, my old GTX 1060 3GB has recently died, and I got a great deal on an almost brand new GTX 1660Ti (for 120 bucks, with still valid warranty...). When I bought my PC, I knew very little about the hardware, that was 4 years ago. The previous 1060 was powered by: MBD->6-pin Pcie->SATA->MOLEX->6-pin Pcie on the GPU. The SATA is also split into two more, in which the SSD and the HDD is plugged. The max TDP for both the cards is 120W.
Only one yellow wire (which I assume is +12V) goes out from the motherboard itself (from a 6-pin), along with 2 ground (black) wires and one 5V red wire. All this was (and is) powering both the drives and the GPU.
Since this is an upgraded HP tower 800 G1, the PSU is OEM, and does't have any GPU outputs by default. Currently, the new 1660Ti is being wired up like this: MBD->6-pin Pcie on the MBD->SATA->MOLEX->8-pin. I bought a MOLEX to 8-pin adaptor, but there are 2 molexes and just one is connected as of now, which means there's only 3/8 pins really connected into the GPU, which seems to be running just fine.
The max Pcie slot output on the MBD is 75W, but under load, out of 120W the 8-pin supplies around 90W and the rest is via Pcie slot. (the SATA and molex are HEAVILY overloaded, and all of it goes from a single 6-pin on the MBD.)
Now, I ordered a 1 MOLEX->2 MOLEX adaptor, which I wanna put inbetween the GPU and the SATA->MOLEX cable, to have all 8 pins on the GPU utilised, so the wattage will be split inbetween all +12V pins, instead of one (that's how it's now).
The second idea was to buy a 1 SATA->2 SATA, which will power the drives, and I will buy a 2SATA->8-pin which will power the GPU.
Schematic 1 is the current wiring; schematic 2 is how I'll wire it later today once the reduction gets delivered; schematic 3 is the idea with the SATA->8-pin reduction. All the color and wires are 1:1 how it is (going to be) in real life. I'll also add pics of my PC and the current wiring.
The question is: is using 2x SATA -> 8-pin (schematic 3) better than the current setup? And until I set it up that way, is using 1 molex->2 molex->8-pin (schematic 2) better than what I have now (schematic 1)?
Thanks so much for help, everything is really appreciated.
Pictures:
Only one yellow wire (which I assume is +12V) goes out from the motherboard itself (from a 6-pin), along with 2 ground (black) wires and one 5V red wire. All this was (and is) powering both the drives and the GPU.
Since this is an upgraded HP tower 800 G1, the PSU is OEM, and does't have any GPU outputs by default. Currently, the new 1660Ti is being wired up like this: MBD->6-pin Pcie on the MBD->SATA->MOLEX->8-pin. I bought a MOLEX to 8-pin adaptor, but there are 2 molexes and just one is connected as of now, which means there's only 3/8 pins really connected into the GPU, which seems to be running just fine.
The max Pcie slot output on the MBD is 75W, but under load, out of 120W the 8-pin supplies around 90W and the rest is via Pcie slot. (the SATA and molex are HEAVILY overloaded, and all of it goes from a single 6-pin on the MBD.)
Now, I ordered a 1 MOLEX->2 MOLEX adaptor, which I wanna put inbetween the GPU and the SATA->MOLEX cable, to have all 8 pins on the GPU utilised, so the wattage will be split inbetween all +12V pins, instead of one (that's how it's now).
The second idea was to buy a 1 SATA->2 SATA, which will power the drives, and I will buy a 2SATA->8-pin which will power the GPU.
Schematic 1 is the current wiring; schematic 2 is how I'll wire it later today once the reduction gets delivered; schematic 3 is the idea with the SATA->8-pin reduction. All the color and wires are 1:1 how it is (going to be) in real life. I'll also add pics of my PC and the current wiring.
The question is: is using 2x SATA -> 8-pin (schematic 3) better than the current setup? And until I set it up that way, is using 1 molex->2 molex->8-pin (schematic 2) better than what I have now (schematic 1)?
Thanks so much for help, everything is really appreciated.
Pictures:
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