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GTX 980 Ti power requirement

Killervolt
By Killervolt
in Graphics Cards
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Posted

Hey guys,

So I finally upgraded to my dream card of 2015 . . . the GTX 980 Ti. This is the first part of a long upgrade process. The question I have is that my PSU has only 2x 6 pin PCIe power connectors, whereas the 980ti needs 2x 8 pins. I’m getting a new PSU in the next few weeks, but for the time being would it be possible/safe to just use the 2 six pins and plug them into the card? If I underclock it a bit and reduce the power limit would it still run? Thanks.

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It'll probably not work... maybe nothing happens or maybe it boots up but locks you on those "PLUG IN ALL PCI-e POWER CONNECTORS" screens.

Personal Desktop":

CPU: Intel Core i7 10700K @5ghz |~| Cooling: bq! Dark Rock Pro 4 |~| MOBO: Gigabyte Z490UD ATX|~| RAM: 16gb DDR4 3333mhzCL16 G.Skill Trident Z |~| GPU: RX 6900XT Sapphire Nitro+ |~| PSU: Corsair TX650M 80Plus Gold |~| Boot:  SSD WD Green M.2 2280 240GB |~| Storage: 1x3TB HDD 7200rpm Seagate Barracuda + SanDisk Ultra 3D 1TB |~| Case: Fractal Design Meshify C Mini |~| Display: Toshiba UL7A 4K/60hz |~| OS: Windows 10 Pro.

Luna, the temporary Desktop:

CPU: AMD R9 7950XT  |~| Cooling: bq! Dark Rock 4 Pro |~| MOBO: Gigabyte Aorus Master |~| RAM: 32G Kingston HyperX |~| GPU: AMD Radeon RX 7900XTX (Reference) |~| PSU: Corsair HX1000 80+ Platinum |~| Windows Boot Drive: 2x 512GB (1TB total) Plextor SATA SSD (RAID0 volume) |~| Linux Boot Drive: 500GB Kingston A2000 |~| Storage: 4TB WD Black HDD |~| Case: Cooler Master Silencio S600 |~| Display 1 (leftmost): Eizo (unknown model) 1920x1080 IPS @ 60Hz|~| Display 2 (center): BenQ ZOWIE XL2540 1920x1080 TN @ 240Hz |~| Display 3 (rightmost): Wacom Cintiq Pro 24 3840x2160 IPS @ 60Hz 10-bit |~| OS: Windows 10 Pro (games / art) + Linux (distro: NixOS; programming and daily driver)
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6 minutes ago, Killervolt said:

Hey guys,

So I finally upgraded to my dream card of 2015 . . . the GTX 980 Ti. This is the first part of a long upgrade process. The question I have is that my PSU has only 2x 6 pin PCIe power connectors, whereas the 980ti needs 2x 8 pins. I’m getting a new PSU in the next few weeks, but for the time being would it be possible/safe to just use the 2 six pins and plug them into the card? If I underclock it a bit and reduce the power limit would it still run? Thanks.

possibly yes. you nee to try.... also you can make 2x 8 pins from your pcu.. it,s really easy.

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Posted (edited)
5 minutes ago, marshall14 said:

possibly yes. you nee to try.... also you can make 2x 8 pins from your pcu.. it,s really easy.

and if you do it with the wrong pin layout you'll fry your gpu or psu, correct

Edited by LukeSavenije
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Just now, Princess Cadence said:

It'll probably not work... maybe nothing happens or maybe it boots up but locks you on those "PLUG IN ALL PCI-e POWER CONNECTORS" screens.

 

Just now, marshall14 said:

possibly yes. you nee to try.... also you can make 2x 8 pins from your pcu.. it,s really easy.

 

Just now, LukeSavenije said:

and if you do it with the wrong pin layout you'll fry your gpu or psu, correct

Thanks for all the replies, I'll give it a go with just the 6 pins and let you know how it goes :)

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9 minutes ago, marshall14 said:

possibly yes. you nee to try.... also you can make 2x 8 pins from your pcu.. it,s really easy.

Did you just tell him to use the CPU power connectors?

Personal Desktop":

CPU: Intel Core i7 10700K @5ghz |~| Cooling: bq! Dark Rock Pro 4 |~| MOBO: Gigabyte Z490UD ATX|~| RAM: 16gb DDR4 3333mhzCL16 G.Skill Trident Z |~| GPU: RX 6900XT Sapphire Nitro+ |~| PSU: Corsair TX650M 80Plus Gold |~| Boot:  SSD WD Green M.2 2280 240GB |~| Storage: 1x3TB HDD 7200rpm Seagate Barracuda + SanDisk Ultra 3D 1TB |~| Case: Fractal Design Meshify C Mini |~| Display: Toshiba UL7A 4K/60hz |~| OS: Windows 10 Pro.

Luna, the temporary Desktop:

CPU: AMD R9 7950XT  |~| Cooling: bq! Dark Rock 4 Pro |~| MOBO: Gigabyte Aorus Master |~| RAM: 32G Kingston HyperX |~| GPU: AMD Radeon RX 7900XTX (Reference) |~| PSU: Corsair HX1000 80+ Platinum |~| Windows Boot Drive: 2x 512GB (1TB total) Plextor SATA SSD (RAID0 volume) |~| Linux Boot Drive: 500GB Kingston A2000 |~| Storage: 4TB WD Black HDD |~| Case: Cooler Master Silencio S600 |~| Display 1 (leftmost): Eizo (unknown model) 1920x1080 IPS @ 60Hz|~| Display 2 (center): BenQ ZOWIE XL2540 1920x1080 TN @ 240Hz |~| Display 3 (rightmost): Wacom Cintiq Pro 24 3840x2160 IPS @ 60Hz 10-bit |~| OS: Windows 10 Pro (games / art) + Linux (distro: NixOS; programming and daily driver)
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Posted
Just now, Princess Cadence said:

Did you just tell him to use the CPU power connectors?

no... i told him to use existing PCI power connectors to make 8 pin connectors 

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Just now, marshall14 said:

no... i told him to use existing PCI power connectors to make 8 pin connectors 

how would I go about doing that? I only have 2 6 pin PCIes and then molex and sata cables.

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8 minutes ago, LukeSavenije said:

and if you do it with the wrong pin layout you'll fry your gpu or psu, correct

 

4 minutes ago, Princess Cadence said:

Did you just tell him to use the CPU power connectors?

 

this is the pics what i did... my power supply didn't had ether 6 or 8 pin connectors i take a multimeter and found not useful 12V cables coming from PCU cut them and soldered on 8 pin connector... on 8 pin connector you need 3- 12V cables  and ather 5 is just ground... you can see pics what it looks like.

57578735_310031839690810_4560860376173903872_n.jpg

58033157_416296999159019_4823444446039244800_n.jpg

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25 minutes ago, marshall14 said:

 

 

this is the pics what i did... my power supply didn't had ether 6 or 8 pin connectors i take a multimeter and found not useful 12V cables coming from PCU cut them and soldered on 8 pin connector... on 8 pin connector you need 3- 12V cables  and ather 5 is just ground... you can see pics what it looks like.

57578735_310031839690810_4560860376173903872_n.jpg

58033157_416296999159019_4823444446039244800_n.jpg

OK thanks for the info! I'll probably still wait for my new PSU though :)

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58 minutes ago, Killervolt said:

OK thanks for the info! I'll probably still wait for my new PSU though :)

good choice

 

what are you getting?

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On 4/23/2019 at 11:59 PM, LukeSavenije said:

good choice

 

what are you getting?

sorry, just saw this :) I'm getting a corsair CX550M as I can get it for cheap- should still be able to power my system right?

Also I tried powering with just the 2 6-pin connectors and got the "Plug in all power cables" error when booting up. Just for future reference :D

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21 minutes ago, Killervolt said:

sorry, just saw this :) I'm getting a corsair CX550M as I can get it for cheap- should still be able to power my system right?

Also I tried powering with just the 2 6-pin connectors and got the "Plug in all power cables" error when booting up. Just for future reference :D

 

Its fine. Just don't go crazy on the oc. Leave it on stock settings.

i5 2400 | ASUS RTX 4090 TUF OC | Seasonic 1200W Prime Gold | WD Green 120gb | WD Blue 1tb | some ram | a random case

 

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7 hours ago, Killervolt said:

sorry, just saw this :) I'm getting a corsair CX550M as I can get it for cheap- should still be able to power my system right?

Also I tried powering with just the 2 6-pin connectors and got the "Plug in all power cables" error when booting up. Just for future reference :D

I'll warn you on forehand... it might whine

 

it's not dangerous, just annoying

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