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Seperate PSU for GPU

Newbie0
By Newbie0
in Cases and Mods
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Go to solution Solved by KenjiUmino,
15 minutes ago, noobie1 said:

Hi,

Suddenly a thing came across my mind...9_9What if I use a separate PSU for the GPU;)?
So, I will be using two PSU.one for the whole PC & one for the GPU:D.

Is this possible:ph34r:????

totally possible and has been done and documented already

 

you can even buy cheap little boards that allow you to switch on the extra PSU in sync with the main PSU - no more paper clips

 

s-l225.jpg

 

but cramming a 2nd full size PSU into the case still looks weird so FSP came up with another idea: a PSU that fits into a 5.25" bay dedicated to powering graphics cards

 

3.jpg

 

Posted

Yes it's possible, but why?

Main System: Phobos

AMD Ryzen 7 2700 (8C/16T), ASRock B450 Steel Legend, 16GB G.SKILL Aegis DDR4 3000MHz, AMD Radeon RX 570 4GB (XFX), 960GB Crucial M500, 2TB Seagate BarraCuda, Windows 10 Pro for Workstations/macOS Catalina

 

Secondary System: York

Intel Core i7-2600 (4C/8T), ASUS P8Z68-V/GEN3, 16GB GEIL Enhance Corsa DDR3 1600MHz, Zotac GeForce GTX 550 Ti 1GB, 240GB ADATA Ultimate SU650, Windows 10 Pro for Workstations

 

Older File Server: Yet to be named

Intel Pentium 4 HT (1C/2T), Intel D865GBF, 3GB DDR 400MHz, ATI Radeon HD 4650 1GB (HIS), 80GB WD Caviar, 320GB Hitachi Deskstar, Windows XP Pro SP3, Windows Server 2003 R2

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Posted

Please don't.

Cor Caeruleus Reborn v6

Spoiler

CPU: Intel - Core i7-8700K

CPU Cooler: be quiet! - PURE ROCK 
Thermal Compound: Arctic Silver - 5 High-Density Polysynthetic Silver 3.5g Thermal Paste 
Motherboard: ASRock Z370 Extreme4
Memory: G.Skill TridentZ RGB 2x8GB 3200/14
Storage: Samsung - 850 EVO-Series 500GB 2.5" Solid State Drive 
Storage: Samsung - 960 EVO 500GB M.2-2280 Solid State Drive
Storage: Western Digital - Blue 2TB 3.5" 5400RPM Internal Hard Drive
Storage: Western Digital - BLACK SERIES 3TB 3.5" 7200RPM Internal Hard Drive
Video Card: EVGA - 970 SSC ACX (1080 is in RMA)
Case: Fractal Design - Define R5 w/Window (Black) ATX Mid Tower Case
Power Supply: EVGA - SuperNOVA P2 750W with CableMod blue/black Pro Series
Optical Drive: LG - WH16NS40 Blu-Ray/DVD/CD Writer 
Operating System: Microsoft - Windows 10 Pro OEM 64-bit and Linux Mint Serena
Keyboard: Logitech - G910 Orion Spectrum RGB Wired Gaming Keyboard
Mouse: Logitech - G502 Wired Optical Mouse
Headphones: Logitech - G430 7.1 Channel  Headset
Speakers: Logitech - Z506 155W 5.1ch Speakers

 

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Posted
  • Solution
15 minutes ago, noobie1 said:

Hi,

Suddenly a thing came across my mind...9_9What if I use a separate PSU for the GPU;)?
So, I will be using two PSU.one for the whole PC & one for the GPU:D.

Is this possible:ph34r:????

totally possible and has been done and documented already

 

you can even buy cheap little boards that allow you to switch on the extra PSU in sync with the main PSU - no more paper clips

 

s-l225.jpg

 

but cramming a 2nd full size PSU into the case still looks weird so FSP came up with another idea: a PSU that fits into a 5.25" bay dedicated to powering graphics cards

 

3.jpg

 

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Posted
Just now, noobie1 said:

Actually, I have one PSU. But, VEGA Would need much more watt to run. So, I would get a new low Watt PSU & use it for the PC & the present PSU will be used for VEGA...

Why not just get one better PSU to power everything? That would be a lot less likely to fail and cause issues. 

Main System: Phobos

AMD Ryzen 7 2700 (8C/16T), ASRock B450 Steel Legend, 16GB G.SKILL Aegis DDR4 3000MHz, AMD Radeon RX 570 4GB (XFX), 960GB Crucial M500, 2TB Seagate BarraCuda, Windows 10 Pro for Workstations/macOS Catalina

 

Secondary System: York

Intel Core i7-2600 (4C/8T), ASUS P8Z68-V/GEN3, 16GB GEIL Enhance Corsa DDR3 1600MHz, Zotac GeForce GTX 550 Ti 1GB, 240GB ADATA Ultimate SU650, Windows 10 Pro for Workstations

 

Older File Server: Yet to be named

Intel Pentium 4 HT (1C/2T), Intel D865GBF, 3GB DDR 400MHz, ATI Radeon HD 4650 1GB (HIS), 80GB WD Caviar, 320GB Hitachi Deskstar, Windows XP Pro SP3, Windows Server 2003 R2

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Posted
Just now, noobie1 said:

Money matters....

Yes, but you could sell the current one you have and get something that's going to be a lot more reliable. 

Main System: Phobos

AMD Ryzen 7 2700 (8C/16T), ASRock B450 Steel Legend, 16GB G.SKILL Aegis DDR4 3000MHz, AMD Radeon RX 570 4GB (XFX), 960GB Crucial M500, 2TB Seagate BarraCuda, Windows 10 Pro for Workstations/macOS Catalina

 

Secondary System: York

Intel Core i7-2600 (4C/8T), ASUS P8Z68-V/GEN3, 16GB GEIL Enhance Corsa DDR3 1600MHz, Zotac GeForce GTX 550 Ti 1GB, 240GB ADATA Ultimate SU650, Windows 10 Pro for Workstations

 

Older File Server: Yet to be named

Intel Pentium 4 HT (1C/2T), Intel D865GBF, 3GB DDR 400MHz, ATI Radeon HD 4650 1GB (HIS), 80GB WD Caviar, 320GB Hitachi Deskstar, Windows XP Pro SP3, Windows Server 2003 R2

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7 minutes ago, noobie1 said:

Money matters....

What do you have now?

Cor Caeruleus Reborn v6

Spoiler

CPU: Intel - Core i7-8700K

CPU Cooler: be quiet! - PURE ROCK 
Thermal Compound: Arctic Silver - 5 High-Density Polysynthetic Silver 3.5g Thermal Paste 
Motherboard: ASRock Z370 Extreme4
Memory: G.Skill TridentZ RGB 2x8GB 3200/14
Storage: Samsung - 850 EVO-Series 500GB 2.5" Solid State Drive 
Storage: Samsung - 960 EVO 500GB M.2-2280 Solid State Drive
Storage: Western Digital - Blue 2TB 3.5" 5400RPM Internal Hard Drive
Storage: Western Digital - BLACK SERIES 3TB 3.5" 7200RPM Internal Hard Drive
Video Card: EVGA - 970 SSC ACX (1080 is in RMA)
Case: Fractal Design - Define R5 w/Window (Black) ATX Mid Tower Case
Power Supply: EVGA - SuperNOVA P2 750W with CableMod blue/black Pro Series
Optical Drive: LG - WH16NS40 Blu-Ray/DVD/CD Writer 
Operating System: Microsoft - Windows 10 Pro OEM 64-bit and Linux Mint Serena
Keyboard: Logitech - G910 Orion Spectrum RGB Wired Gaming Keyboard
Mouse: Logitech - G502 Wired Optical Mouse
Headphones: Logitech - G430 7.1 Channel  Headset
Speakers: Logitech - Z506 155W 5.1ch Speakers

 

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13 minutes ago, noobie1 said:

Please explain it more technically. I'm willing to do it...

in normal operation, a PSU is connected to the mainboard with at least the 24 pin ATX connector. it will not turn on without a mainboard connected because there is a wire in this 24 pin connector that needs to be shorted to ground to make the PSU start up. 

 

the mainboard does the shorting when you boot your computer and keeps it in that state until you shut it down.

 

if you add a 2nd power supply to your system there is no second 24 pin connector on the mainboard so no way to tell the 2nd PSU when to turn on or off. 

 

you CAN short this wire to ground manually but it would mean that the 2nd PSU would be always on even if the PC itself is off - you would have to turn the 2nd psu on or off by hand wich is inconvenient as hell

 

that little board in the picture takes care of that - it can sense the main PSUs power state and switch the 2nd PSU on or off accordingly

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Posted
38 minutes ago, noobie1 said:

Hi,

Suddenly a thing came across my mind...9_9What if I use a separate PSU for the GPU;)?
So, I will be using two PSU.one for the whole PC & one for the GPU:D.

Is this possible:ph34r:????

As said it can be done but it would not be worth the effort or hassle, you would be better off with a large power PSU for the system as a whole than to get two mediocre units and use a power adapter to jump start the second unit. 

Updated Modding FAQ

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1 minute ago, Nimrodor said:

AvZrPea.jpg

 

It works fine, but I wouldn't recommend it for an everyday rig.

me neither. not only does it look ghetto as fuck, it can also become a problem when one PSU detects a critical failure and shuts down but the other one didn't get the memo and keeps the system powered. 

 

I already fried a mainboard because a GPU i had on a different PSU decided to die mid flight but the main PSU didn't know something was wrong and kept everything else running as if nothing happened. POOF ...

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