Choosing The Right PSU, Discussions about power supply units.
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 Aug 14 2008, 09:59 PM
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#1
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Senior Member
1,231 posts Joined: Aug 2005 From: Shah Alam 
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ok, planning to buy new psu to power up Gainward 4850GS
Corsair HX520watt or Corsair TX650watt(one modular and other one normal psu) planning to change into SFF in December but now still ATX both almost same price  any comments which one i should choose? |
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Aug 25 2009, 11:06 PM
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#2
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Senior Member
1,231 posts Joined: Aug 2005 From: Shah Alam
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guys. about single rail psu and multiple rail i dont understand whats the fuss about
anyone care to elaborate? QUOTE ARE MULTIPLE 12-VOLT RAILS BETTER THAN A SINGLE 12-VOLT RAIL? -SourceWith all the hype about multiple 12-volt rails (ads claim that two rails is better than one, five is better than four, etc.), you'd think it was a better design. Unfortunately, it's not! Here are the facts: A large, single 12-volt rail (without a 240VA limit) can transfer 100% of the 12-volt output from the PSU to the computer, while a multi-rail 12-volt design has distribution losses of up to 30% of the power supply's rating. Those losses occur because power literally gets "trapped" on under-utilized rails. For example, if the 12-volt rail that powers the CPU is rated for 17 amps and the CPU only uses 7A, the remaining 10A is unusable, since it is isolated from the rest of the system. Since the maximum current from any one 12-volt rail of a multiple-rail PSU is limited to 20 amps (240VA / 12 volts = 20 amps), PCs with high-performance components that draw over 20 amps from the same rail are subject to over-current shutdowns. With power requirements for multiple processors and graphics cards continuing to grow, the multiple-rail design, with its 240VA limit per rail, is basically obsolete. PC Power and Cooling is once again leading the industry. All of our power supplies now feature a large, single 12-volt rail. The design is favored by major processor and graphics companies, complies with EPS12V specs (the 240VA limit is not a requirement) and is approved by all major safety agencies such as UL and TUV.3 i think about future proof psu, is better to go for it let say you have a hd4890 now and you not sure whether to grab it in the future having a psu that have pci-e power connector more than 2 is better a psu that have Atx12 & EPS12V coz alot of mobo start using EPS12V standard now for oc purpose you dont really upgrade a psu as often   |
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Oct 21 2009, 06:39 PM
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#3
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Senior Member
1,231 posts Joined: Aug 2005 From: Shah Alam
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QUOTE(Limited_AL @ Oct 21 2009, 07:27 PM) What is a modular PSU? Modular a PSU with cable u can plug in plug out when not needed(reduce cable messiness)Heard of it b4, juz dunno what it is.... (- -")  i tot 80 plus mean it can utilize the power consumed by your system at 80% efficiency and other will be dissipate to heat (waste out) |
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May 25 2011, 07:15 PM
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#4
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Senior Member
1,231 posts Joined: Aug 2005 From: Shah Alam
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QUOTE(alvin ong @ May 25 2011, 03:54 PM) hi, can i know what kind of power supply is this? thats really an old psu around pentium4 era, you can try find psu at second hand store in lypand where can i find a replacement for this. Thanks in advance. [attachmentid=2234456][attachmentid=2234457][attachmentid=2234458] really hard to find new one |
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