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Will my PSU handle a GTX 770 or 780?

Elmarrr
By Elmarrr
in Power Supplies
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Go to solution Solved by DrunkenSquirrel,

That actually has multiple rails with less amps than his current one, I don't think it would be much of an upgrade.

 

 

They are saying 42 amps for a reason, would you rather have it underpowered, coil whining and eventually die? I don't think so, i recommend my PSU, is dirt cheap, 54 AMPS on one 12 v rail, the way is supposed to be, and it has 750w 80+ bronze, soooo...

 

The current one should work fine, it certainly wouldn't be underpowered just pushing near the limits a bit.

 

If you do decide to upgrade get a single rail with 42 Amps and 600W+ and be done with it.

Posted

Helloo Linustech Community!

 

I have a Coolermaster Real Power M520 and it has this sticker on the side. Will I be able to run either a 770 or 780 with this? (CPU is a 3570K, no optical drive, SSD bootdrive, one HDD)

 

 

 

fekXIMi.jpg

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nope, you need something better than this.

Gaming HTPC:

R5 5600X - Cryorig C7 - Asus ROG B350-i - EVGA RTX2060KO - 16gb G.Skill Ripjaws V 3333mhz - Corsair SF450 - 500gb 960 EVO - LianLi TU100B


Desktop PC:
R9 3900X - Peerless Assassin 120 SE - Asus Prime X570 Pro - Powercolor 7900XT - 32gb LPX 3200mhz - Corsair SF750 Platinum - 1TB WD SN850X - CoolerMaster NR200 White - Gigabyte M27Q-SA - Corsair K70 Rapidfire - Logitech MX518 Legendary - HyperXCloud Alpha wireless


Boss-NAS [Build Log]:
R5 2400G - Noctua NH-D14 - Asus Prime X370-Pro - 16gb G.Skill Aegis 3000mhz - Seasonic Focus Platinum 550W - Fractal Design R5 - 
250gb 970 Evo (OS) - 2x500gb 860 Evo (Raid0) - 6x4TB WD Red (RaidZ2)

Synology-NAS:
DS920+
2x4TB Ironwolf - 1x18TB Seagate Exos X20

 

Audio Gear:

Hifiman HE-400i - Kennerton Magister - Beyerdynamic DT880 250Ohm - AKG K7XX - Fostex TH-X00 - O2 Amp/DAC Combo - 
Klipsch RP280F - Klipsch RP160M - Klipsch RP440C - Yamaha RX-V479

 

Reviews and Stuff:

GTX 780 DCU2 // 8600GTS // Hifiman HE-400i // Kennerton Magister
Folding all the Proteins! // Boincerino

Useful Links:
Do you need an AMP/DAC? // Recommended Audio Gear // PSU Tier List 

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Posted

should run, but it's thight :D i don't know how your 12V rails are splitted

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Posted
  • Author

nope, you need something better than this.

what exactly would you say is the problem?

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You need more. 300 w are not going to cut it.

Codename: HighFlyer, specs:  CPU: i5 2500k cooled by a H70ish(2 rad)   Mobo: MSI MPower Z77   GPUs: Gigabyte GTX 660 OC 1150 MHZ core, 3150 memory both   RAM: Corsair Vengeance 16G @1600mhz   SSD: ADATA Premier Pro sx900 / HDD Seagate Barracuda 1TB/Samsung 1TB   Power supply: Corsair RM650 80+ Gold   Case Corsair Carbide 500R   5.4 ghz achieved on the good old 2500k, may it rest in peace. Current daily OC is 4.8 @1.41 v

 

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Should be fine, It wouldn't handle any more though, so no SLI.

 

 

Why would you say that?

 

what exactly would you say is the problem?

 

nvidia recommends a psu greater than 600watts with min. 40amps on the 12v rail. you got 520w with 19amps if i refer correctly.

Gaming HTPC:

R5 5600X - Cryorig C7 - Asus ROG B350-i - EVGA RTX2060KO - 16gb G.Skill Ripjaws V 3333mhz - Corsair SF450 - 500gb 960 EVO - LianLi TU100B


Desktop PC:
R9 3900X - Peerless Assassin 120 SE - Asus Prime X570 Pro - Powercolor 7900XT - 32gb LPX 3200mhz - Corsair SF750 Platinum - 1TB WD SN850X - CoolerMaster NR200 White - Gigabyte M27Q-SA - Corsair K70 Rapidfire - Logitech MX518 Legendary - HyperXCloud Alpha wireless


Boss-NAS [Build Log]:
R5 2400G - Noctua NH-D14 - Asus Prime X370-Pro - 16gb G.Skill Aegis 3000mhz - Seasonic Focus Platinum 550W - Fractal Design R5 - 
250gb 970 Evo (OS) - 2x500gb 860 Evo (Raid0) - 6x4TB WD Red (RaidZ2)

Synology-NAS:
DS920+
2x4TB Ironwolf - 1x18TB Seagate Exos X20

 

Audio Gear:

Hifiman HE-400i - Kennerton Magister - Beyerdynamic DT880 250Ohm - AKG K7XX - Fostex TH-X00 - O2 Amp/DAC Combo - 
Klipsch RP280F - Klipsch RP160M - Klipsch RP440C - Yamaha RX-V479

 

Reviews and Stuff:

GTX 780 DCU2 // 8600GTS // Hifiman HE-400i // Kennerton Magister
Folding all the Proteins! // Boincerino

Useful Links:
Do you need an AMP/DAC? // Recommended Audio Gear // PSU Tier List 

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Posted

You need more. 300 w are not going to cut it.

That would be 520W

nvidia recommends a psu greater than 600watts with min. 40amps on the 12v rail. you got 520w with 19amps if i refer correctly.

The PSU Reccomendations are for the total system, he doesn't have a power hungry Build, and the GPU would barely use more than 240W even on full load.

As for the 12v rail it has 3 rails so thats a combined of 57 Amps (Which I think should be fine but not sure on this one whether it needs to be a single rail).

My Rig: http://i.imgur.com/cot1Lxf.png
 

 

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nvidia recommends a psu greater than 600watts with min. 40amps on the 12v rail. you got 520w with 19amps if i refer correctly.

 

a 770 needs maybe 200W-220W or so. the only problem would be if both PCIe connectors are on the same Rail. 19Ax12V=228W

 

If one runs on rail 2 and the other one on rail 3 it's no problem. Couldn't find anything on that though.

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This: GeForce GTX 780 - 42A and a 600W PSU minimum

You have 30 amps on 2 rails, it has only 2 PCI-e connectors.

Codename: HighFlyer, specs:  CPU: i5 2500k cooled by a H70ish(2 rad)   Mobo: MSI MPower Z77   GPUs: Gigabyte GTX 660 OC 1150 MHZ core, 3150 memory both   RAM: Corsair Vengeance 16G @1600mhz   SSD: ADATA Premier Pro sx900 / HDD Seagate Barracuda 1TB/Samsung 1TB   Power supply: Corsair RM650 80+ Gold   Case Corsair Carbide 500R   5.4 ghz achieved on the good old 2500k, may it rest in peace. Current daily OC is 4.8 @1.41 v

 

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This: GeForce GTX 780 - 42A and a 600W PSU minimum

You have 30 amps on 2 rails, it has only 2 PCI-e connectors.

 

exactly.

Gaming HTPC:

R5 5600X - Cryorig C7 - Asus ROG B350-i - EVGA RTX2060KO - 16gb G.Skill Ripjaws V 3333mhz - Corsair SF450 - 500gb 960 EVO - LianLi TU100B


Desktop PC:
R9 3900X - Peerless Assassin 120 SE - Asus Prime X570 Pro - Powercolor 7900XT - 32gb LPX 3200mhz - Corsair SF750 Platinum - 1TB WD SN850X - CoolerMaster NR200 White - Gigabyte M27Q-SA - Corsair K70 Rapidfire - Logitech MX518 Legendary - HyperXCloud Alpha wireless


Boss-NAS [Build Log]:
R5 2400G - Noctua NH-D14 - Asus Prime X370-Pro - 16gb G.Skill Aegis 3000mhz - Seasonic Focus Platinum 550W - Fractal Design R5 - 
250gb 970 Evo (OS) - 2x500gb 860 Evo (Raid0) - 6x4TB WD Red (RaidZ2)

Synology-NAS:
DS920+
2x4TB Ironwolf - 1x18TB Seagate Exos X20

 

Audio Gear:

Hifiman HE-400i - Kennerton Magister - Beyerdynamic DT880 250Ohm - AKG K7XX - Fostex TH-X00 - O2 Amp/DAC Combo - 
Klipsch RP280F - Klipsch RP160M - Klipsch RP440C - Yamaha RX-V479

 

Reviews and Stuff:

GTX 780 DCU2 // 8600GTS // Hifiman HE-400i // Kennerton Magister
Folding all the Proteins! // Boincerino

Useful Links:
Do you need an AMP/DAC? // Recommended Audio Gear // PSU Tier List 

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Posted
  • Author

ah ok :/

what PSU would you recommend then?

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This: GeForce GTX 780 - 42A and a 600W PSU minimum

You have 30 amps on 2 rails, it has only 2 PCI-e connectors.

they recommend that so that they are on the save side.

 

42A x 12 V = 504W on the 12V rails. but in reality a 780 needs 200W and a 3570k maybe 100W with board. His Real Power M520 is able to provide 400W on 12V, so it will work as long as the 12V rails can all  be used rail1 for board and CPU, rail 2 for PCIe 8pin and rail 3 for PCIe 6pin.

 

And if they build that PSU with a bit of  intelligence it would be build like that and will run. but i don't know :D

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they recommend that so that they are on the save side.

 

42A x 12 V = 504W on the 12V rails. but in reality a 780 needs 200W and a 3570k maybe 100W with board. His Real Power M520 is able to provide 400W on 12V, so it will work as long as the 12V rails can all  be used rail1 for board and CPU, rail 2 for PCIe 8pin and rail 3 for PCIe 6pin.

 

And if they build that PSU with a bit of  intelligence it would be build like that and will run. but i don't know :D

is there a way to tell which connector uses which rail?

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They are saying 42 amps for a reason, would you rather have it underpowered, coil whining and eventually die? I don't think so, i recommend my PSU, is dirt cheap, 54 AMPS on one 12 v rail, the way is supposed to be, and it has 750w 80+ bronze, soooo...

Codename: HighFlyer, specs:  CPU: i5 2500k cooled by a H70ish(2 rad)   Mobo: MSI MPower Z77   GPUs: Gigabyte GTX 660 OC 1150 MHZ core, 3150 memory both   RAM: Corsair Vengeance 16G @1600mhz   SSD: ADATA Premier Pro sx900 / HDD Seagate Barracuda 1TB/Samsung 1TB   Power supply: Corsair RM650 80+ Gold   Case Corsair Carbide 500R   5.4 ghz achieved on the good old 2500k, may it rest in peace. Current daily OC is 4.8 @1.41 v

 

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The issue is, you have a combined 57amps over 3 rails.  57amps on 1 rail would be sufficient or 29 amps on 2 rails (if the CPU and GPU could be split) would work.  But you want a single rail PSU.

Specs: Core I7-2600K @ 4.5GHz @ 1.35V, 4x4GB Corsair Vengeance Black 1600MHz CL9, Cooler Master Evo 212, MSI Z77 Mpower Motherboard, Sapphire Radeon HD 7950 Vapor-X @ 1000/1400, Cooler Master HAF 932 Blue Edition w/ 3 Cougar Hydraulic Bearing 120MM fans (2 up top 1 in the bottom) replaced side panel with a window, and rear fan with a Cougar Hydraulic Bearing 140MM, Cooler Master GX 650 80+ Bronze PSU, Samsung DVD-RW, Samsung 840 Pro 128GB SSD, Seagate 750GB SATA III 7200RPM

 

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  • Solution

That actually has multiple rails with less amps than his current one, I don't think it would be much of an upgrade.

 

 

They are saying 42 amps for a reason, would you rather have it underpowered, coil whining and eventually die? I don't think so, i recommend my PSU, is dirt cheap, 54 AMPS on one 12 v rail, the way is supposed to be, and it has 750w 80+ bronze, soooo...

 

The current one should work fine, it certainly wouldn't be underpowered just pushing near the limits a bit.

 

If you do decide to upgrade get a single rail with 42 Amps and 600W+ and be done with it.

My Rig: http://i.imgur.com/cot1Lxf.png
 

 

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That actually has multiple rails with less amps than his current one, I don't think it would be much of an upgrade.

 

 

 

The current one should work fine, it certainly wouldn't be underpowered just pushing near the limits a bit.

 

If you do decide to upgrade get a single rail with 42 Amps and 600W+ and be done with it.

2 x 20Ax12V is enough for any GPU, yes a single rail design is always nice but more expensive. electricity is expensive in germany and nobody buys less than a 80+gold psu. Bequiet dominates the german market, they are quiet and reliable and cheaper than Corsair/Seasonic/Enermax. If you could buy a E9 in the US you would :D

 

 

.

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*sigh*

DrunkenSquirrel is 100% correct. That unit is perfectly fine.

 

Nvidia "recommends" 42A on the 12v rail, as it also takes all of the other components into account. In addition to that, they usually they are looking at a worst case senario when they post such numbers, where the other components are pulling ~300w, the labeled wattage is the peak power and such. Often it's more so that people done come back and complain that their generic units couldn't delivery it's labeled wattage, so they overestimate significantly "just in case."

 

With a GTX780, that rig would need 400w at most. Generally speaking however it's not actually going to be pulling that much power, at gaming load you are probably looking at around 300w, even while stress-testing the unit you are looking at an average of around 350w. That means that you will need around 25-30A off the 12v rail. Balanced across the three rails, tripping OCP should not be a problem at all.

 

Lastly, there's nothing really wrong with running a power supply at higher load levels, especially if it's of reasonable quality (which it is, to an extent). Especially in this case where it still is only at 70-80% load, output power should be within specified ranges, there probably won't be much of an effect on longevity either.

 

Some actual numbers of power consumption:

http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_780/24.html (GPU only)

http://www.guru3d.com/articles_pages/geforce_gtx_titan_3_way_sli_review,4.html (entire system, but with an idling CPU)

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ok guys thanks for your help, I'm still not entirely sure how I will decide and what I will buy but at least I am quite a bit more enlightened about PSUs now ^^

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