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GTX Titan 2/3/4-way SLI owners: which PSU are you using? - Page 15

post #141 of 174

2014 Slinky Supercomputer, NVIDIA GeForce GTX TITAN 4-Way SLI ~ Slinky PC build by an artist
PSU Cooler Master Silent Pro M2 (1500W)
Edited by Slinky PC - 2/16/14 at 6:27pm
post #142 of 174
overvolting with 2 id go with at the very least ax1200i. with my 2 kingpins at 1.5v from dmm and the cards over 1400 core i am now pulling 1300w from wall with kil a watt. my ax1200i is screaming, i will be buying the ax1500i and finally making the jump to 8 core intel with haswell e in the fall
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post #143 of 174
I am running 4-way 680 Classifieds and the power needed just for the GPU's is 1000W. The TDP is 195W but when overclocked they pull much more. I have a 1500W PSU and it isn't enough. Especially when you overclock the CPU and Ram. I'm running 15 fans 140mm+ and I use 2 fan controllers. I used 2 PSU's and the total from the wall was 1387W. That was just O/c'ing the video cards. I haven't pushed my CPU yet. I can easily pull an extra 150W doing that. I have 10 drives, 2 are SSD's and the rest are a mix of Raid and non-Raid setups. The non-Raid stores my backups. I've got led's and a pump and various other items that I still need to install.
post #144 of 174
Quote:
Originally Posted by Twotenths View Post

I am running 4-way 680 Classifieds and the power needed just for the GPU's is 1000W. The TDP is 195W but when overclocked they pull much more. I have a 1500W PSU and it isn't enough. Especially when you overclock the CPU and Ram. I'm running 15 fans 140mm+ and I use 2 fan controllers. I used 2 PSU's and the total from the wall was 1387W. That was just O/c'ing the video cards. I haven't pushed my CPU yet. I can easily pull an extra 150W doing that. I have 10 drives, 2 are SSD's and the rest are a mix of Raid and non-Raid setups. The non-Raid stores my backups. I've got led's and a pump and various other items that I still need to install.


If your PSU is 90% efficient while pulling 1387W from the wall, then that means your computer is pulling 1248W from the PSU. So, don't go by what's being pulled from the wall. Instead, multiply it by about .90 for estimating 90% efficiency. Your results from that calculation will be approximately what your PSU is delivering to your computer, and that's coming out of the PSU's advertised capacity. The wall draw doesn't mean anything in this context.

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It's a computer!
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Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
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post #145 of 174
I'm using an EVGA NEX1500 power supply which is 87% efficient at that level. I have more things to install and if you look at the reviews for this PSU they're not very good. I haven't O/C'd my CPU at that level yet. I am seeing power drops on the 12V rail that will impact my overclocking ability. I know that my outlets put out 120V (tested with multimeter) not 115 or 110 so my source power is clean. Overclocking is all about stability and if your power isn't stable enough your benchmarks will suffer. I am looking at the new EVGA PSU's which are rebranded Super Flower units using the EVGA style connectors. They are highly rated at JonnyGuru's and come in 2 varieties. The G2 and the P2. G= Gold P= Plat. The G2 units miss the Platinum ranking by just .3%. Unfortunately they are unavailable anywhere right now and the few who have them are gouging people on the price. I have one on backorder that I ordered on Jan 18th. It's a 1300W unit for $219CAN. CAN to USD is close to 10% right now so you should be able to acquire one for around the $200USD mark when they come back into stock. NewEgg is overcharging by more than $150 and that is why they still carry stock.
post #146 of 174
Quote:
Originally Posted by vlps5122 View Post

i will be buying the ax1500i and finally making the jump to 8 core intel with haswell e in the fall

I was looking at the Haswell-E myself but it is a triple whammy price-wise. You will pay top dollar for the X99 chipset board, top dollar for the new 248pin DDR4 ram, and top dollar for the Haswell-E chip itself. That makes waiting a while (10 to 12 months after release) before upgrading more realistic. They will have debugged the X99 chipset and stabilized the memory modules and CPU. Buying the latest is costly and comes with a variety of problems from early release. Just look at the amount of Bios upgrades for the X79 chipset. Doing all three at once will have many teething problems. What will stop me more than anything is that the 2011 socket will become the 2013 or 2011 ver 3 which will not support any previous processors. The pin-outs change. The same amount of pins but a different configuration incompatible with previous cpu's.
post #147 of 174
Quote:
Originally Posted by Twotenths View Post

I'm using an EVGA NEX1500 power supply which is 87% efficient at that level. I have more things to install and if you look at the reviews for this PSU they're not very good. I haven't O/C'd my CPU at that level yet. I am seeing power drops on the 12V rail that will impact my overclocking ability. I know that my outlets put out 120V (tested with multimeter) not 115 or 110 so my source power is clean. Overclocking is all about stability and if your power isn't stable enough your benchmarks will suffer. I am looking at the new EVGA PSU's which are rebranded Super Flower units using the EVGA style connectors. They are highly rated at JonnyGuru's and come in 2 varieties. The G2 and the P2. G= Gold P= Plat. The G2 units miss the Platinum ranking by just .3%. Unfortunately they are unavailable anywhere right now and the few who have them are gouging people on the price. I have one on backorder that I ordered on Jan 18th. It's a 1300W unit for $219CAN. CAN to USD is close to 10% right now so you should be able to acquire one for around the $200USD mark when they come back into stock. NewEgg is overcharging by more than $150 and that is why they still carry stock.

 

Ok, then at 87% efficiency, 1387W from the wall means your computer is pulling 1206W from the PSU instead of the 1248W at 90%.

It's a computer!
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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 
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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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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post #148 of 174
Using a Lepa 1600 with 3 x GTX Titans OC'd with a 4930k @4.4, 2 pumps, and multiple fans. Have had zero issues.

Adding a 4th Titan, on the fence with which PSU to add to the equation. Considering Corsair AX760.
post #149 of 174
Quote:
Originally Posted by TheDude26 View Post

Using a Lepa 1600 with 3 x GTX Titans OC'd with a 4930k @4.4, 2 pumps, and multiple fans. Have had zero issues.

Adding a 4th Titan, on the fence with which PSU to add to the equation. Considering Corsair AX760.

Dont bother with the AX760 you got better options for the same amount of money
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Seravee
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post #150 of 174
I'm using a dual PSU set-up: Corsair AX1200i + AX850 with 4X Quad-SLI Titans. The 4 Titans are on the AX1200i, and everything else is on the AX850 (CPU, mobo, SSDs, HHDs, 4 pumps, 36 fans, etc etc).

Everything is working fine.

I had 3 Antec HCP-1200 failed on me. Muh. No problems with the 2 Corsairs set-up for around 1 year now.
    
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