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power supply for X1950XT - Page 2

post #11 of 21
Quote:
Also stay away from modular PSUs, as their wires can't maintain a continuous power supply to a very power hungry videocard -- it can brown out.
Dont know who told you that 1... not true one bit though.

amps x voltage input = true power - {efficiency rating} = real world output

Usually the only difference w/ a modular is the fact that the wires are not easily removable, has nothing to do with any kind of performance difference. Brown outs are from poor AC inputs anyways and have nothing to do with the DC side of things, a lower DC voltage just means poorly functioning or malfunctioned equipment.

A high efficiency rating + high amperage rating are going to provide the best possible 'real' voltage outputs w/ the highest stability.
post #12 of 21
Quote:
Originally Posted by CL3P20 View Post
Dont know who told you that 1... not true one bit though.
Don't believe me, believe the facts...

http://www.pcpowercooling.com/about/interview.php


Quote:
CPU: Modular power supplies seem to be gaining a lot of traction in the market, but PCP&C doesn’t make any modular designs. Why?
Quote:
Dobson: Yeah, it’s real popular, but the industry hasn’t done anything to educate people about modular plugs. The pins that are used in the modular plugs have a very low capacity to pass current. You’re losing power through those pins. It’s electrical resistance between the male and the female part of the pin, to the extent that the voltage drop in just the pins is equivalent to about two feet of wire. The effect is that modular power supplies, everything else being equal, are capable of about 10% less power than power supplies without modular plugs. And that’s under ideal conditions. In real life it gets worse because the pins loosen, corrode, and burn. Over time the resistance builds up. A year down the road, a guy could be running his system and all of a sudden it stops working reliably, and he has no way of knowing that the reason is because the pin inside that modular plug has become corroded or burned. This technique has been out for about six months, but people are going to find that the reliability is a massive failure point. Also, especially given the way people pull their harnesses around and tie them down, it creates a lot of stress on those pins. So instead of the pins having full 100% contact surface to surface, in most cases those pins are only touching maybe 10% or 30% of their surface area. What’s rated for 5A going through those pins, in reality if the pins aren’t making good contact, your rating’s down to maybe 3A, and with that much constriction, those pins just heat up, and it gets worse. For real pros in the industry, no way would they specify that kind of arrangement. This is a consumer-oriented gimmick.

This is why you won't find PC Power and Cooling making modular PSUs. Performance PC's will mod it for you if you must have one, but PC&C doesn't make them that way for a v-e-r-y good reason.
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post #13 of 21
Chu' got beef with my NUUO?! Its modular and runs my setup great. Not one hickup, brownout or anything other than normal working.
    
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post #14 of 21
The quote from Pc is quite a lame generalization really...poor contact is a bad scenario for anything related electricity, LOL. Really, they are attacking the integrity of a modular PSU based on...pins? Thats a joke right?

Poor quality is just that...pins er no pins. But, seriously...to discredit the most popular form of PSU's in existince...based on the fact that "poor contact" is a killer.....ROFL

I wont be giving up mine anytime soon.
post #15 of 21
Quote:
Originally Posted by CL3P20 View Post
The quote from Pc is quite a lame generalization really...poor contact is a bad scenario for anything related electricity, LOL. Really, they are attacking the integrity of a modular PSU based on...pins? Thats a joke right?
Few people will discount that statement by the head honcho of the most reliable PSU maker worldwide as a joke. If anyone in the world knows PSUs and their pros and cons, it'll be Dobson.

PCP&C's rep doesn't come from flashy gimmicks, it's by mission critical quality PSUs. If Dobson claims there's issues with modular PSUs, there's issues. Otherwise his company would be joining the rest to cash in on another iPod fad.
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post #16 of 21
If you have some PSU question, Just ask Chozart!
He is a PSU MASTER. hehe
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post #17 of 21
Thread Starter 
Thanks guys!

I went with a 500W carrying 20A across two rails for a total of 40A. I hope I'll be all set with that.
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My Current System
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CPUMotherboardGraphicsRAM
AMD Phenom II X2 555 Black Edition ASUS M4A79XTD EVO EAH6850  8GB DDR3 1600 
Hard DriveOptical DriveOSMonitor
600GB WD, 300GB WD Pioneer Blu-ray Windows 7 64bit 22" Acer LCD 
KeyboardPowerCaseMouse
IBM 71G4646 FRU# OCZ Fatal1ty OCZ550FTY 550W ATX12V v2.2 / EPS12V Antec Logitech MX500 
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SB Audigy 
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post #18 of 21
Quote:
Originally Posted by chaos40 View Post
Thanks guys!

I went with a 500W carrying 20A across two rails for a total of 40A. I hope I'll be all set with that.
The problem is you'll get 40A at the expense of wattage. That PSU delievers more wattage for the +3.3V and +5V, while the +12V1 and +12V2 are drained. With some videocards pushing past 200W (stock), you'll see very quickly where that PSU will fail if you're OC'ing

Unless your system is using more than 7x80mm fans, 2 DVD drives and 2 HDD, that PSU is going to waste it on non-OC'ing hardware.

Another thing I don't see that it's rated as true 500W, either. If it isn't, what's listed is peak power rates which can be maintained only for less than a few seconds. That means the actual usable power is less than 500W.
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i7-2600k 3.4Ghz AsRock P67 Extreme6 Sapphire HD 6970 Ripjaws X DDR 2133 
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My Big Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600k 3.4Ghz AsRock P67 Extreme6 Sapphire HD 6970 Ripjaws X DDR 2133 
Hard DriveOptical DriveOSMonitor
WD1002FAEX 1TB - RAID 0 Lite-ON iHBS212 Blu-ray Windows 7 Ultimate x64 Samsung SyncMaster 2494 
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Zboard SeaSonic x750 Modular HAF X Logitech G500 
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post #19 of 21
Thread Starter 
This is the PSU I purchased...

http://www.newegg.com/Product/Produc...82E16817174023

My system has 3 drives, all WD 80GB (2 are in a RAID0 array). It has two fans, one 120mm and one 80mm, a Sony DVD-RW, it will have 4 sticks of DDR2 ram (2x512, 2x256) and items listed at the start of this thread (the MSI 945 chipset mobo, the E6400 CPU and the Sapphire Radeon x1900xt 256MB).

Thanks again for all your advice. I appreciate it.
My Current System
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X2 555 Black Edition ASUS M4A79XTD EVO EAH6850  8GB DDR3 1600 
Hard DriveOptical DriveOSMonitor
600GB WD, 300GB WD Pioneer Blu-ray Windows 7 64bit 22" Acer LCD 
KeyboardPowerCaseMouse
IBM 71G4646 FRU# OCZ Fatal1ty OCZ550FTY 550W ATX12V v2.2 / EPS12V Antec Logitech MX500 
Audio
SB Audigy 
  hide details  
Reply
My Current System
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X2 555 Black Edition ASUS M4A79XTD EVO EAH6850  8GB DDR3 1600 
Hard DriveOptical DriveOSMonitor
600GB WD, 300GB WD Pioneer Blu-ray Windows 7 64bit 22" Acer LCD 
KeyboardPowerCaseMouse
IBM 71G4646 FRU# OCZ Fatal1ty OCZ550FTY 550W ATX12V v2.2 / EPS12V Antec Logitech MX500 
Audio
SB Audigy 
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Reply
post #20 of 21
Really, all other things aside...DO not forget to buy a 2.2 series compliant PSU. New standards are continuosly being made and improved upon.

2.2 has the latest protection features.
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