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Total power usage

amadino13
By amadino13
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Go to solution Solved by Nexus,

http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/65715-pny-geforce-gtx-780-oc-3gb-review-6.html

 

This is where I based my assumptions off. They said the card idles at 165. However the SLI post says they idle at 70w. Someone definitely got their measurements wrong. 

Hardware Cannucks is measuring the full system power consumption vs just the cards i believe.

 

Either way you are more than able to run the setup with your current psu.

Another site is saying 590w under load, and thats with a heavily overclocked 3770k which should be more in line with what you will be looking at with your 4790k.

http://www.hardocp.com/article/2013/08/06/nvidia_geforce_gtx_780_sli_video_card_review/9#.U6RKc_ldVtU

 

 

Edit:- Also the Hardware Cannucks is using a non reference card with higher clocks, that could also add to the discrepancy. Im also not sure what platform they tested it on, it could also be that they are using an LGA2011 system which would push it up again.

Posted

Hey, I have used the tool provided in the sticky post but I'm not sure how to understand the results. I am planning to buy a 4790k and overclock it to around 4.7ghz hopefully. I read a review where they overclocked it to 4.84ghz and it said the peak power was 144W. I am planning to get another GTX 780 as well (I read they reach 400W under max load) The calculator on the website said my computer will use up to 1089w under full load however it will use about 680w under 60% load. I have an 850w 80+ bronze power supply. Is that going to be sufficient for my system or should I upgrade to a higher wattage? 

CPU: i7 4790k @4.6GHz MOBO: MSI Z97 Gaming 7 RAM: ADATA XPG 16GB 1600MHz FAN: NZXT Kraken X60 PSU: Corsair TX850 V2 GPU: NVIDIA GeForce GTX 1080 HDD: 2 x Samsung 850 Pro 512GB RAID 0 CASE: NZXT Switch 810 OS: Windows 10

 

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Your current psu is more than enough.

Psu calculators for the most part are highly inaccurate, generally overshooting how much wattage you need. Your system wouldn't likely be at load outside of synthetic benchmarks and even then, wouldn't hit what their suspected theoretical power draw. Unless your 780's are pushing high unlocked voltages, the system should barely peak at 500w for normal gaming and such.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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According tho this you should be absolutely fine.

http://www.tweaktown.com/tweakipedia/39/gtx-780-sli-vs-r9-290x-cf-power-consumption-showdown/index.html

|i5 3570k @4.4Ghz | Asus Maximus V Gene | 8gb Corsair XMS3 | 2 x MSI HD7970 OC @ 1175mhz | 512gb Crucial M4 | Corsair AX750 | Fractal Design Define Mini | Dell P2416D 

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My 780 is running at 1.212V all the time. 

CPU: i7 4790k @4.6GHz MOBO: MSI Z97 Gaming 7 RAM: ADATA XPG 16GB 1600MHz FAN: NZXT Kraken X60 PSU: Corsair TX850 V2 GPU: NVIDIA GeForce GTX 1080 HDD: 2 x Samsung 850 Pro 512GB RAID 0 CASE: NZXT Switch 810 OS: Windows 10

 

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ah my mistake. I saw somewhere that a single 780 uses about 400w under load so I added both together (800w). That's why I thought I might need a higher PSU.

CPU: i7 4790k @4.6GHz MOBO: MSI Z97 Gaming 7 RAM: ADATA XPG 16GB 1600MHz FAN: NZXT Kraken X60 PSU: Corsair TX850 V2 GPU: NVIDIA GeForce GTX 1080 HDD: 2 x Samsung 850 Pro 512GB RAID 0 CASE: NZXT Switch 810 OS: Windows 10

 

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ah my mistake. I saw somewhere that a single 780 uses about 400w under load so I added both together (800w). That's why I thought I might need a higher PSU.

Ive never seen this, but according to Nvidia the cards max power draw is 250w.

http://www.geforce.co.uk/hardware/desktop-gpus/geforce-gtx-780/specifications

 

Its possible that some sites list the minimum psu requirement as 400w though.

 

Edit:- Factory and manual overclocked cards will obviously be higher though.

|i5 3570k @4.4Ghz | Asus Maximus V Gene | 8gb Corsair XMS3 | 2 x MSI HD7970 OC @ 1175mhz | 512gb Crucial M4 | Corsair AX750 | Fractal Design Define Mini | Dell P2416D 

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Ive never seen this, but according to Nvidia the cards max power draw is 250w.

http://www.geforce.co.uk/hardware/desktop-gpus/geforce-gtx-780/specifications

 

Its possible that some sites list the minimum psu requirement as 400w though.

 

Edit:- Factory and manual overclocked cards will obviously be higher though.

 

 

http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/65715-pny-geforce-gtx-780-oc-3gb-review-6.html

 

This is where I based my assumptions off. They said the card idles at 165. However the SLI post says they idle at 70w. Someone definitely got their measurements wrong. 

CPU: i7 4790k @4.6GHz MOBO: MSI Z97 Gaming 7 RAM: ADATA XPG 16GB 1600MHz FAN: NZXT Kraken X60 PSU: Corsair TX850 V2 GPU: NVIDIA GeForce GTX 1080 HDD: 2 x Samsung 850 Pro 512GB RAID 0 CASE: NZXT Switch 810 OS: Windows 10

 

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ah my mistake. I saw somewhere that a single 780 uses about 400w under load so I added both together (800w). That's why I thought I might need a higher PSU.

The whole PC probably uses 400w but not the card :P

Aragorn (WS): 250D | 6800k | 840 Pro 512GB | Intel 530 480GB  | Asus X99-M WS | 64GB DDR4 | Corsair HX720i | GTX 1070 | Corsair H115i | Philips BDM4350UC 43" 3840x2160 IPS

Gimli (server):  Node 304 | G4560 | ADATA XPG SX8000 128GB | 2x 5TB WD Red | ASROCK H270M-ITX/AC  | 8GB DDR4 | Seasonic 400FL

 Omega (server):                 Fractal Arc Mini R2 | i3 4130 | 500GB Maxtor | 2TB WD Red : Raid 1 | 3TB Seagate Barracuda | 16GB RAM | Seasonic G-450w
Alpha (WS): 900D | 4770k | GTX 780  | 840 Pro 512GB  | GA-Z87X-OC | Corsair RM 850 | 24GB 2400mhz | Samsung S27B970D 2560x1440

                              ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||

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http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/65715-pny-geforce-gtx-780-oc-3gb-review-6.html

This is where I based my assumptions off. They said the card idles at 165. However the SLI post says they idle at 70w. Someone definitely got their measurements wrong. 

You're comparing the power draw of the entire system with a 780 to just a 780 sli without the system.  

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/65715-pny-geforce-gtx-780-oc-3gb-review-6.html

 

This is where I based my assumptions off. They said the card idles at 165. However the SLI post says they idle at 70w. Someone definitely got their measurements wrong. 

Hardware Cannucks is measuring the full system power consumption vs just the cards i believe.

 

Either way you are more than able to run the setup with your current psu.

Another site is saying 590w under load, and thats with a heavily overclocked 3770k which should be more in line with what you will be looking at with your 4790k.

http://www.hardocp.com/article/2013/08/06/nvidia_geforce_gtx_780_sli_video_card_review/9#.U6RKc_ldVtU

 

 

Edit:- Also the Hardware Cannucks is using a non reference card with higher clocks, that could also add to the discrepancy. Im also not sure what platform they tested it on, it could also be that they are using an LGA2011 system which would push it up again.

|i5 3570k @4.4Ghz | Asus Maximus V Gene | 8gb Corsair XMS3 | 2 x MSI HD7970 OC @ 1175mhz | 512gb Crucial M4 | Corsair AX750 | Fractal Design Define Mini | Dell P2416D 

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I'm happy to hear that I can use my PSU. Thank you for all the help guys. 

CPU: i7 4790k @4.6GHz MOBO: MSI Z97 Gaming 7 RAM: ADATA XPG 16GB 1600MHz FAN: NZXT Kraken X60 PSU: Corsair TX850 V2 GPU: NVIDIA GeForce GTX 1080 HDD: 2 x Samsung 850 Pro 512GB RAID 0 CASE: NZXT Switch 810 OS: Windows 10

 

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