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Am I limiting power to my GPU?

post #1 of 9
Thread Starter 
I have a 980strix with custom bios, it has 6pin and 8 pin connectors. My PSU came with 8 pin to dual 6+2pin cables. From my knowledge a single 8 pin has a maximum rating of 150watts and 6+2 pins also have a maximum of 150watt regardless if your using the extra 2 pins or not (because the extra 2 pins are just grounds). To me it seems like I am trying to draw 300W out of the single 8 pin connector. Is this dangerous? Should I be using two independent cables? (my PSU only came with the dual 6+2 pin cables)
post #2 of 9
What PSU are you talking about?
post #3 of 9
Thread Starter 
Quote:
Originally Posted by GoLDii3 View Post

What PSU are you talking about?

its a 750w 80+ gold thermaltake toughpower. not too fussed about the psu. im more worried about the 6 pin on the card not being able to take 150w or the cable not being able to take 300w. i dont even know if the card is getting all that power through one cable?
post #4 of 9
Quote:
To me it seems like I am trying to draw 300W out of the single 8 pin connector. Is this dangerous? Should I be using two independent cables? (my PSU only came with the dual 6+2 pin cables)

Except the TDP on a 980, even at max voltage and high clocks, never ever comes close to 300w. You've got nothing to worry about.
post #5 of 9
Thread Starter 
Quote:
Originally Posted by CroakV View Post

Except the TDP on a 980, even at max voltage and high clocks, never ever comes close to 300w. You've got nothing to worry about.

I have a custom bios with a max tdp of 350w. GPUz says it draws close to 80% of that under max load which is 280w. minus the 75w from PCIe slot and call it 200w over the 8pin to dual 6+2. 200w is greater than the 150w I thought you could draw from a single 8 pin. So if I actually am drawing over 150w from the 8 pin could this cause problems? Or am I not getting full power delivery because a single 8 pin can not output enough?
post #6 of 9
You've got nothing to worry about.
post #7 of 9
It's fine. Being modular the cables are designed to handle the appropriate voltages. You would use two cables from PSU to the GPU for an Sli\Crossfire configuration.
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AMD Ryzen 5 1400 3.8Ghz Gigabyte AB350M-HD3 MSI Geforce GTX 1060 3GB Gaming X G.Skill 16GB(2x8GB) 3200Mhz DDR4 
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Computer
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CPUMotherboardGraphicsRAM
AMD Ryzen 5 1400 3.8Ghz Gigabyte AB350M-HD3 MSI Geforce GTX 1060 3GB Gaming X G.Skill 16GB(2x8GB) 3200Mhz DDR4 
Hard DriveOSMonitorPower
SSDs and HDDs Windows 10 x64 Pro Acer G7 G227HQLbi @75Hz EVGA 430w 
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Deepcool Frame 
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post #8 of 9
Each wire can handle 7 amps (http://www.engineeringtoolbox.com/wire-gauges-d_419.html).

7 Amps * 12 V * 6 wires = 504 Watts

No problem.
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NoSATA
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MotherboardGraphicsRAMHard Drive
Gigabyte GA-Z170X-UD5 Gigabyte GTX 1070 G1 Gaming Corsair Samsung 950 Pro M.2 
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Corsair H100i v2 Windows 10 Acer 27" 144Hz Seasonic X=650 
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Antec P280 
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post #9 of 9
Thread Starter 
Quote:
Originally Posted by LikesToSlide View Post

Each wire can handle 7 amps (http://www.engineeringtoolbox.com/wire-gauges-d_419.html).

7 Amps * 12 V * 6 wires = 504 Watts

No problem.

this is what i was looking for. thanks for your help thumb.gif
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