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PSU for x58 + i7 + 6 dimms of ram! - Page 2

post #11 of 26
Thread Starter 
Quote:
Originally Posted by Nvidia-Brownies View Post
If you like overkill, a 950W. I'm sure you are going to go SLI soon anyways.
Don't think I need to overkill too much... the GTX275 is way too noisy already, so getting another nCard to SLI is not a "necessity" atm, and I'm sick and tired of the nvida drivers!

Quote:
Originally Posted by TwoCables View Post
Then I recommend looking for quality 550W to 650W power supplies.

May I recommend some from PC Case Gear? If so, then what would be your budget?
I'm looking for 650-750W, and I will be moving some of the old hdds to external anyway. But all this 80+ efficiency is giving me doubts, even for a 80+ quality 650W, that will only give about 552W max...
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post #12 of 26
Quote:
Originally Posted by totalz View Post
Don't think I need to overkill too much... the GTX275 is way too noisy already, so getting another nCard to SLI is not a "necessity" atm, and I'm sick and tired of the nvida drivers!



I'm looking for 650-750W, and I will be moving some of the old hdds to external anyway. But all this 80+ efficiency is giving me doubts, even for a 80+ quality 650W, that will only give about 552W max...
That's not what efficiency refers to, lol. It will output its rated 650W, but that's not what it'll pull from the socket. Say your 650W PSU has 80% efficiency at full load, it would draw ~780W from the wall. All that extra energy is being wasted as heat.

Someone correct me if I'm wrong on that calculation, but I am quite certain it's just a direct percentage.
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post #13 of 26
Thread Starter 
Quote:
Originally Posted by SgtHop View Post
That's not what efficiency refers to, lol. It will output its rated 650W, but that's not what it'll pull from the socket. Say your 650W PSU has 80% efficiency at full load, it would draw ~780W from the wall. All that extra energy is being wasted as heat.

Someone correct me if I'm wrong on that calculation, but I am quite certain it's just a direct percentage.
I think u're right, I remembered the other way round
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post #14 of 26
Quote:
Originally Posted by totalz View Post
Don't think I need to overkill too much... the GTX275 is way too noisy already, so getting another nCard to SLI is not a "necessity" atm, and I'm sick and tired of the nvida drivers!



I'm looking for 650-750W, and I will be moving some of the old hdds to external anyway. But all this 80+ efficiency is giving me doubts, even for a 80+ quality 650W, that will only give about 552W max...
He is right about the efficiency: it just refers to how much energy is lost as heat. So let's say that you read a review where the professional reviewer was able to get their system to pull 600W from the wall outlet during the test. If we assume that the PSU was 85% efficient during that power draw, then that would mean that the system pulled about 510W from the PSU. That would mean that a quality 520W power supply would have had no problem with it.

So, may I recommend PSUs from PC Case Gear? If so, then what is your budget?
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post #15 of 26
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
He is right about the efficiency: it just refers to how much energy is lost as heat. So let's say that you read a review where the professional reviewer was able to get their system to pull 600W from the wall outlet during the test. If we assume that the PSU was 85% efficient during that power draw, then that would mean that the system pulled about 510W from the PSU. That would mean that a quality 520W power supply would have had no problem with it.

So, may I recommend PSUs from PC Case Gear? If so, then what is your budget?
Thanks TwoCables, of course you can recommend PSUs from PCG, I assume it's the online shop that I found by google!? My budget is around a $100 bucks... but I can pay more if necessary.

I'm checking the Antec EA650W, http://www.jonnyguru.com/modules.php...Story&reid=110 , it seems adequate!?
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post #16 of 26
Quote:
Originally Posted by totalz View Post
Thanks TwoCables, of course you can recommend PSUs from PCG, I assume it's the online shop that I found by google!? My budget is around a $100 bucks... but I can pay more if necessary.

I'm checking the Antec EA650W, http://www.jonnyguru.com/modules.php...Story&reid=110 , it seems adequate!?
I just assumed you've heard of PCG because your profile says you live in Australia. Do you still live there?
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It's a computer!
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post #17 of 26
Voltage calculator

Here u got a calculator,its pretty easy to use and by my experience is pretty accurate also.
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post #18 of 26
Quote:
Originally Posted by Deelix View Post
Voltage calculator

Here u got a calculator,its pretty easy to use and by my experience is pretty accurate also.
I recommend not using PSU calculators and relying on OCN instead. These PSU calculators are inaccurate and they can easily be used incorrectly and people usually end up with extremely bloated results.

So if totalz uses it, then we have to make sure he uses it correctly. There are at least a half a dozen very critical options/settings in this calculator that must be set correctly.

By the way, here is the original. The one you linked is a copy.

http://extreme.outervision.com/psucalculatorlite.jsp
It's a computer!
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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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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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post #19 of 26
Quote:
Originally Posted by totalz View Post
I think I need a new PSU for the set.

Say I'm running i7 at default voltage and 6 rams at 1.6v, 1 SSD and 4 sata hdds, 3 old + 1 new models, and probably another 2T in near future, GTX275 video card. How much amp is necessary for +3.3v and +5v

Is this PSU able to handle my need?
http://www.acbel.com/eng/Product.asp...sd=31&&pid=256
+12v seems adequate, but +5v seems a bit low at 20A!

Need some opinions here.
The specs say it is a 700W PSU. It looks okay and can handle your current computer with ease (if the data sheet is reliable). I have not heard of AcBel before so I don't know if their specifications are reliable.

For a GTX 275 and Nehalem i7, a good model that is about 500W to 550W is what you would need.
Edited by Riou - 8/19/11 at 4:15am
post #20 of 26
Thread Starter 
Quote:
Originally Posted by Riou View Post
The specs say it is a 700W PSU. It looks okay and can handle your current computer with ease (if the data sheet is reliable). I have not heard of AcBel before so I don't know if their specifications are reliable.

For a GTX 275 and Nehalem i7, a good model that is about 500W to 550W is what you would need.
Quote:
Originally Posted by TwoCables View Post
I recommend not using PSU calculators and relying on OCN instead. These PSU calculators are inaccurate and they can easily be used incorrectly and people usually end up with extremely bloated results.

So if totalz uses it, then we have to make sure he uses it correctly. There are at least a half a dozen very critical options/settings in this calculator that must be set correctly.

By the way, here is the original. The one you linked is a copy.

http://extreme.outervision.com/psucalculatorlite.jsp
I'm just worrying about the 5V rail, according to SATA and molex spec, the SATA hdd uses 5V and 12V. So I just want to make sure the amp is enough on 5V. And then what does the ram uses, 5V or 12V? I mean it's a total different story alone in OC with 3 dimms or 6 dimms. Am I over-thinking?

I know these PSU calculators, thanks TwoCables for the original link. Unfortunately, only the pro version supplies what's needed for 3.3V and 5V rail.

Code:
System Type:1 physical CPU
Motherboard:Regular - Desktop
CPU:Intel Core i7-920 2667 MHz Bloomfield
Overclocked:3667 MHz, 1.37 V
CPU Utilization (TDP):90% TDP

RAM:6 Sticks DDR3 SDRAM
Video Card:NVIDIA GeForce GTX 275
Video Type:Single Card

Regular SATA:3 HDDs
Green SATA:2 HDDs

Flash SSD:1 Drive
DVD-RW/DVD+RW Drive:1 Drive
PCI-e x1 Card:1 Card

USB:5 Devices

Fans
Regular: 5 Fans 120mm;  

Keyboard and mouse:Yes

System Load:90 %

Capacitor Aging (+ W %):25 %

 
Minimum PSU Wattage:640 Watts
Recommended Wattage:690 Watts
Is it true that if amp from 5V rail is not enough, then the extra can be drawn from 12V rail?

ps. not in Aus anymore, hence the Asian OEM brand.
Edited by totalz - 8/20/11 at 7:58pm
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SilverLight
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OCZ Vertex SSD 30G(OS) +320Gx2(raid0)+640G+2TBx2 Win7 x64 Acer 19" + Sharp 37" Acer wireless 
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Antec High Current Gamer 900W Lian Li PC-8FI (silver) MS wireless 
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