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General discussion

Looking into a good PSU

Mar 15, 2004 2:06PM PST

I've been in the market for a good stable PSU. I'm currently looking at the Thermaltake 420 PurePower PSU. On Thermaltake's website, they have two versions, one with Active PFC and the other without. Seems like the Active PFC is a good option, but is also $10 more. Is it really worth it? Here are my current specs:

AMD T-Bird Slot A @ 850mhz
Freetech AMD 750 mobo, last revision (4)
Toshiba 5X DVD
Generic 16/12/36 CDRW
Toshiba Floppy
Samsung SP8004H 80gb 7200rpm Harddrive w/ dual fan HD cooler
Leadtek GeForce2 MX MAX (64mb SDRAM)
512MB Crucial PC133 SDRAM @ 100mhz
Realtek 8139 10/100 Network Card
CMedia 8738 Sound Card
PCI 4+1-port USB card
4 case fans

I'm running all this on a 250W Leadman Technology PSU from another computer that got burnt out (AMD K6-2)!!

I'm definitely needing at LEAST 400W, but I want to be sure it's an awesome PSU for a great price (great bang for less buck, like AMD CPUs). I also don't want those generic cheapo PSUs because I've gotten burnt 3 times by getting those. They worked WORSE than the current 250W I have now.

Thanks to anyone that can help.

Discussion is locked

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Re:Looking into a good PSU
Mar 15, 2004 5:01PM PST

not an expert opinion but

I got an enermax whisper variable speed fan 450 and it works great - fj

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Active Power Factor Correction is not normally necessary
Mar 15, 2004 5:35PM PST

in a home environment, unless you have multiple computers or many many old type flourescent lamps [new ones have better power factors], lots of motors [not computer fans].

I believe that the lower priced one will still have passive PFC which should be adequate.

Be sure to get a supply that has two separate 12 volt rails and connectors for SATA drives. Also one with the delayed shut down [keeps fans running for a short time to prevent "heat soak" from letting the CPU et al get too hot after power is off].

Be ready for the future which is now.

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Re:Looking into a good PSU
Mar 16, 2004 4:19AM PST

PFC= protection fail circuitry -OR- please forgo cash.

Unless, you're on your last crumb of bread or starving, $10 is a pitance compared to the other componets you've listed. Its cheap insurance to keep your system up and running. But, really just about all decent p/s units have PFC build-in so to have Thermatake make a big deal about it is for not. If you want to save some cash, look for 400W+ unit with at least two fans and maybe a rpm control for fan(s) for quietness or autocontrol unit. Some p/s units are 500W+ for roughly $10 more but they look the same, wonder what the guts are myself, but usually the final spec to check is the rated sustained power output, so when a p/s unit gets hotter it actually starts to degrade ouputs so quality always counts here. Heck, that's my rant of the topic.

good luck -----Willy

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Re:Looking into a good PSU
Mar 16, 2004 5:16PM PST

thanks for all your input, I'm thinking about the Thermaltake because of the good reviews. I trust tried and true reviews, not how cheap the PSU is.

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Reviews? Better than that. We have tests!
Mar 16, 2004 8:49PM PST
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Re:Reviews? Better than that. We have tests!
Mar 21, 2004 10:16AM PST

Read the website. It's good. I didn't see any Thermaltake PSUs on there though. I've seen some reviews of the one I want, mainly the W0008 or W0009 model of their PurePower line. I was trying to decide if choosing the Active PFC was a good decision.

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Power Factor Correction.
Mar 21, 2004 11:20AM PST

Please read http://www.lmphotonics.com/pwrfact.htm

Now that you have, I can reveal that such is required with newer power supplies by some regulatory agencies.

If you are building ONE machine, it's not something you need.

Bob

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Re:Power Factor Correction.
Mar 25, 2004 10:00AM PST

Thanks for your help. I decided on getting the W0008 model w/ Active PFC. My computer seems to be running a lot smoother now since I have enough juice to power the whole thing. I guess the difference between 250W and 420W is a BIG one!!