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How much can the TX850w output? - Page 3

post #21 of 40
Quote:
Originally Posted by ZealotKi11er View Post
GTX470 is a 225W GPU. 3 x 225W = 675W + 200W OCed Core i7, 100W for Fans, MB = 975W so in reality you need 1000W+ if you push it. Myself with Overcloked GTX470, Water Cooling, About 10 fans, 5 HDDs, Core i7 OCed ~ 550W @ Max possible situation. Counting efficiently ~ 480W Add 400W for 2 more GPU ~ 880W which tells me 850W should do for 95% of the time unless you try Furmark and Prime95 at the same time you will overload the PSU which sometimes can not handle it. Folding should be no problem. A basic rule is that the about of PCIE should tell you how many cards its can run.
NVIDIA says that the GTX 470 can pull an absolute maximum of 215W under the highest load possible. Of course, this is at stock. But when adding other cards for SLI, the other cards cannot pull this much under the highest possible loads due to scaling. Unfortunately, I don't know how much less, so I'll be generous and say that cards 2 and 3 can only pull up to 185W while the first card might still be able to pull 215W (I'm still being generous).

So due to SLI scaling, we're looking at an absolute maximum power draw of about 585W on the +12V in my example. The TX850 has a +12V capacity of 840W, so we're left with about 160W (159) on the +12V in my extreme example under the highest loads.

But 100W in fans? I don't know about your fans, but mine pull up to 1.8W per fan. So, that's roughly 2 watts per fan, and I have 6 of these which amounts to 12W in fans.

Anyway, I'll set that ultra-extreme (and unrealistic) example aside because I know that the TX850 is more than enough to handle a high-end system with three GTX 470s in it.


Quote:
Originally Posted by youra6 View Post
Corsair generally underrates their power supplies.
Actually, they use the "continuous" capacity to rate their PSUs as opposed to the "peak" capacity. In a sense, it's more accurate than using the "peak" rating. This is why it seems like they underrate their PSUs.
Edited by TwoCables - 3/7/11 at 6:14pm
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post #22 of 40
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
NVIDIA says that the GTX 470 can pull an absolute maximum of 215W under the highest load possible. Of course, this is at stock. But when adding other cards for SLI, the other cards cannot pull this much under the highest possible loads due to scaling. Unfortunately, I don't know how much less, so I'll be generous and say that cards 2 and 3 can only pull up to 185W while the first card might still be able to pull 215W (I'm still being generous).

So due to SLI scaling, we're looking at an absolute maximum power draw of about 585W on the +12V in my example. The TX850 has a +12V capacity of 744W, so we're left with about 160W (159) on the +12V in my extreme example under the highest loads.

But 100W in fans? I don't know about your fans, but mine pull up to 1.8W per fan. So, that's roughly 2 watts per fan, and I have 6 of these which amounts to 12W in fans.

Anyway, I'll set that ultra-extreme (and unrealistic) example aside because I know that the TX850 is more than enough to handle a high-end system with three GTX 470s in it.



Actually, they use the "continuous" capacity to rate their PSUs as opposed to the "peak" capacity. In a sense, it's more accurate than using the "peak" rating. This is why it seems like they underrate their PSUs.

awww
thanks 2cables!
so the TX850 can safely let me overclock CPU and all 3 GPU's in the future right? I only have 2 470's right now
post #23 of 40
Quote:
Originally Posted by Mr.Pie View Post
awww
thanks 2cables!
so the TX850 can safely let me overclock CPU and all 3 GPU's in the future right? I only have 2 470's right now
I'd prefer to hear from Phaedrus2129 to be absolutely sure, but I am fairly confident it would! I was even wrong about the TX850's +12V capacity: it's 840W, not 744W. 744W is the +12V capacity of the HX750. I apologize for that misinformation (I had a brain fart).

Also, I decided to use eXtreme Outer Vision's power supply calculator (I'm using the Pro version), and so here are my results. But please correct me on any of the settings as it pertains to your build because I was guessing all the way (I am also trying to guess on the high side):




Check out the Recommended Amperage! The TX850's +3.3V capacity is 30A, its +5V is 30A, and its +12V is 70A! So even though this is talking about 956W, I am fairly confident that the TX850 will be totally fine because of its amperages. Plus, I chose 15% Capacitor Aging which makes a big difference. Here are the results with 0% Capacitor Aging (which represents a brand new, freshly unboxed PSU):




Things change even more when changing the System Load value, but 80% is good because that means that 80% of your entire system is under absolutely full load. I mean, 100% of the system includes every last thing that is being powered by the power supply, including all of the hard drives, solid state drives, optical drives, and even any USB devices connected such as a flash drive. So 80% means that 20% of your rig is still idle.

But again, I am guessing at all of these selections right down to the smallest detail. So tell me what needs to be changed, removed, or added and I'll post new results.

Oh, and in case you're curious about the HX850's specifications: its amperages are 25, 25, and 70 (respectively).
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #24 of 40
I don't know, especially if you're overclocking the GPUs and will be folding or running stress testing apps.

Worth a shot. Worst case the power supply will shut down gracefully when the OCP or OPP kick in.
post #25 of 40
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
I'd prefer to hear from Phaedrus2129 to be absolutely sure, but I am fairly confident it would! I was even wrong about the TX850's +12V capacity: it's 840W, not 744W. 744W is the +12V capacity of the HX750. I apologize for that misinformation (I had a brain fart).

Also, I decided to use eXtreme Outer Vision's power supply calculator (I'm using the Pro version), and so here are my results. But please correct me on any of the settings as it pertains to your build because I was guessing all the way (I am also trying to guess on the high side):




Check out the Recommended Amperage! The TX850's +3.3V capacity is 30A, its +5V is 30A, and its +12V is 70A! So even though this is talking about 956W, I am fairly confident that the TX850 will be totally fine because of its amperages. Plus, I chose 15% Capacitor Aging which makes a big difference. Here are the results with 0% Capacitor Aging (which represents a brand new, freshly unboxed PSU):




Things change even more when changing the System Load value, but 80% is good because that means that 80% of your entire system is under absolutely full load. I mean, 100% of the system includes every last thing that is being powered by the power supply, including all of the hard drives, solid state drives, optical drives, and even any USB devices connected such as a flash drive. So 80% means that 20% of your rig is still idle.

But again, I am guessing at all of these selections right down to the smallest detail. So tell me what needs to be changed, removed, or added and I'll post new results.

Oh, and in case you're curious about the HX850's specifications: its amperages are 25, 25, and 70 (respectively).
Coolio thanks!
well the tx850 I'm getting is 2 years old.....
And I'm wc' ing my rig

Quote:
Originally Posted by Phaedrus2129 View Post
I don't know, especially if you're overclocking the GPUs and will be folding or running stress testing apps.

Worth a shot. Worst case the power supply will shut down gracefully when the OCP or OPP kick in.

Thanks! It won't blow up or anything right?
post #26 of 40
Quote:
Originally Posted by Mr.Pie View Post
Thanks! It won't blow up or anything right?
Nope, not unless something's seriously wrong with it.
post #27 of 40
Quote:
Originally Posted by Mr.Pie View Post
Coolio thanks!
well the tx850 I'm getting is 2 years old.....
And I'm wc' ing my rig




Thanks! It won't blow up or anything right?
Nah, it won't blow up. If anything, it'll be like trying to turn a light on when there's no electricity. It just won't happen.

Anyway, what are all of the specifications of the rig that's going to be powered by the TX850? I want as many details as possible because I want to run it by their Pro version of their power supply calculator again.
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
post #28 of 40
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
Nah, it won't blow up. If anything, it'll be like trying to turn a light on when there's no electricity. It just won't happen.

Anyway, what are all of the specifications of the rig that's going to be powered by the TX850? I want as many details as possible because I want to run it by their Pro version of their power supply calculator again.
Cool thanks 2cables!

Specs:
Intel xeon e5620 put the overclock at 1.4vcore
3 sticks of ram
Tri sli gtx 470's
3hdds
1 disc drive
1x mcp355 pump
At least 10standard 120mm fans

Powered by a 2 year old tx850w
post #29 of 40
Quote:
Originally Posted by Mr.Pie View Post
Cool thanks 2cables!

Specs:
Intel xeon e5620 put the overclock at 1.4vcore
3 sticks of ram
Tri sli gtx 470's
3hdds
1 disc drive
1x mcp355 pump
At least 10standard 120mm fans

Powered by a 2 year old tx850w
Aw man, what happened to overclocking an i7?

Anyway, thank you! Here are some various results (full-page screenshots, linked to save screen space):


10% Capacitor Aging, 75% System Load:

http://home.comcast.net/~twocables/MrPiePSU_10_75.png

10% Capacitor Aging, 80% System Load:

http://home.comcast.net/~twocables/MrPiePSU_10_80.png

10% Capacitor Aging, 85% System Load:

http://home.comcast.net/~twocables/MrPiePSU_10_85.png

10% Capacitor Aging, 90% System Load:

http://home.comcast.net/~twocables/MrPiePSU_10_90.png




15% Capacitor Aging, 75% System Load:

http://home.comcast.net/~twocables/MrPiePSU_15_75.png

15% Capacitor Aging, 80% System Load:

http://home.comcast.net/~twocables/MrPiePSU_15_80.png

15% Capacitor Aging, 85% System Load:

http://home.comcast.net/~twocables/MrPiePSU_15_85.png

15% Capacitor Aging, 90% System Load:

http://home.comcast.net/~twocables/MrPiePSU_15_90.png

(these were taken with the Firefox extension called Screengrab)



85% to 90% System Load is a bit unrealistic unless you're folding on both the CPU and the graphics cards at the same time.

Anyway, please analyze these very carefully and tell me of any corrections that need to be made. But if nothing is left out, then it looks to me like the TX850 will be enough!
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
post #30 of 40
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
Aw man, what happened to overclocking an i7?

Anyway, thank you! Here are some various results (full-page screenshots, linked to save screen space):


10% Capacitor Aging, 75% System Load:

http://home.comcast.net/~twocables/MrPiePSU_10_75.png

10% Capacitor Aging, 80% System Load:

http://home.comcast.net/~twocables/MrPiePSU_10_80.png

10% Capacitor Aging, 85% System Load:

http://home.comcast.net/~twocables/MrPiePSU_10_85.png

10% Capacitor Aging, 90% System Load:

http://home.comcast.net/~twocables/MrPiePSU_10_90.png




15% Capacitor Aging, 75% System Load:

http://home.comcast.net/~twocables/MrPiePSU_15_75.png

15% Capacitor Aging, 80% System Load:

http://home.comcast.net/~twocables/MrPiePSU_15_80.png

15% Capacitor Aging, 85% System Load:

http://home.comcast.net/~twocables/MrPiePSU_15_85.png

15% Capacitor Aging, 90% System Load:

http://home.comcast.net/~twocables/MrPiePSU_15_90.png

(these were taken with the Firefox extension called Screengrab)



85% to 90% System Load is a bit unrealistic unless you're folding on both the CPU and the graphics cards at the same time.

Anyway, please analyze these very carefully and tell me of any corrections that need to be made. But if nothing is left out, then it looks to me like the TX850 will be enough!
teehee! thanks
I wanted alittle somethjign special when I got my rig back last year so I grabbed one of the cheapest 32nm quads on the market

that looks about right thankyou; but i'd be aiming for 4.3ghz+ at that vcore

so verdict is; TX850 should be able to cut tri-sli or not? it seems to go over to 950w+ once load is over 85% load.....

and thanks!
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