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What should my psu's wattage and etc be?

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April 30, 2010 6:30:31 AM

My Specs:
Intel core 2 quad cpu q8200 @2.33GHz
6.00GB of RAM

actually not sure about any other specific things
- i have 1 cd drive, thats it
-integrated graphics

I plan on switching to a 9500gt, what wattage should the psu i buy be?

im on a 300w psu right now.

ps. if you can name a better graphics card and power supply for less than a 130$ total, that'd be cool. I can actually go up to 170$ but i would rather not.

More about : psu wattage

April 30, 2010 6:46:16 AM

Get a ANTEC, Corsair, OCZ 450 to 550 Watt PSU, If you want to go up to $130 then you can go 750 Watt but that is probably overkill.
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a b ) Power supply
April 30, 2010 3:01:35 PM

ryancxg said:
My Specs:
Intel core 2 quad cpu q8200 @2.33GHz
6.00GB of RAM

actually not sure about any other specific things
- i have 1 cd drive, thats it
-integrated graphics

I plan on switching to a 9500gt, what wattage should the psu i buy be?

im on a 300w psu right now.

ps. if you can name a better graphics card and power supply for less than a 130$ total, that'd be cool. I can actually go up to 170$ but i would rather not.


Graphics - MSI R5670-PMD1G Radeon HD 5670 $108.99
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU - COOLER MASTER RS-400-PSAR-J3 400W ATX12V V2.31 Power Supply $29.99
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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a b ) Power supply
April 30, 2010 3:12:08 PM

no that cooler ,master is JUNK
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a b ) Power supply
April 30, 2010 6:10:31 PM


[1] Your link for the radeon card is actually of the 4670, not 5670.
[2] I know the cooler master is junk, but he wanted the combo to be within the $130-140 range, & that seems to be the best deal; unless he plans on getting the 5450 (which is a shitty gaming card) & a good psu.
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a b ) Power supply
May 1, 2010 3:05:29 AM

thank you, retiredchief. yeah that exactly what i was looking at,
and then i moved on down the list, and i must have chosen the wrong one when i went back up to find the 5670..

shovelnose? who the heck is that?
heres a shovelnose shark: (it was the the first result in google images)
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May 1, 2010 3:23:36 AM

how much amps per 12v would be considered good?
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a b ) Power supply
May 1, 2010 4:12:14 AM

You can lead a horse to water, but getting hime to drink is another question.

Do a google search on quallity PSUs

You will find Raidmax about 3 feet below negative 1.

I also prefer Buying at a "Real" store. Have shoped at fry's, also like microcenter - BUT if newegg, zipzoomfly, or tigerdirect has a better price for what I want (Not what they are tring to unload) I buy on line.
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May 1, 2010 5:39:50 AM

12V/19A

made by liteon
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May 1, 2010 6:24:34 AM

Liteon makes decent OEM power supplies but 19A is pretty marginal (I was hoping for 22-24A). A 5670 would probably still work as long as you're not overclocking anything and you only have 1-2 HDs and 1-3 fans. The 4850 is quite a bit more powerful so it may be worth spending the extra $30 on the new PSU anyway. What games do you want to play and what's the resolution of your monitor?
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May 1, 2010 7:26:58 AM

I would like to play left 4 dead 2, bad company 2, etc. i dont mind if its not high quality or anything. just decent. I would hope to be able to play future games with decent graphics, though im not sure if anything more graphics demanding will come out anytime soon, aside from crysis, which i dont really wanna play.

and im not sure about resolution, but its i think 21 or 23 inches? it has a cord to plug into an outlet for power, if that makes a difference.
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May 1, 2010 7:30:32 AM

If i were to just buy a graphics card or something, would it be likely for my psu to blow my whole motherboard or anything like that? curious lol.
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a b ) Power supply
May 1, 2010 8:16:50 AM

ryancxg said:
I would like to play left 4 dead 2, bad company 2, etc. i dont mind if its not high quality or anything. just decent. I would hope to be able to play future games with decent graphics, though im not sure if anything more graphics demanding will come out anytime soon, aside from crysis, which i dont really wanna play.

and im not sure about resolution, but its i think 21 or 23 inches? it has a cord to plug into an outlet for power, if that makes a difference.


You mean the screem size is 21-23 ", & if that's the case, then the resolution is definitely more than 1400 X 800. Then the 5670 won't be able to give you good frame rates at max settings in most of the games.

Quote:
If i were to just buy a graphics card or something, would it be likely for my psu to blow my whole motherboard or anything like that? curious lol.


It won't blow your motherboard, but you will get artifacts on screen (small dots dancing around) when playing games due to the gpu not getting enough juice from the psu.

Quote:
how much amps per +12v would be considered good?

It's subjective, but here's a rough estimate for a decent psu:

300-400 W : 30-35 A
400-500 W : 35-40 A
500-600 W : 40-45 A
You get the drift
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May 1, 2010 1:34:07 PM

ksampanna said:
You mean the screem size is 21-23 ", & if that's the case, then the resolution is definitely more than 1400 X 800. Then the 5670 won't be able to give you good frame rates at max settings in most of the games.

Agreed, that monitor is probably 1440x900/1600x900/1680x1050 and a 5670 is going to have a hard time playing modern games at that resolution. You should go with my original suggestion of the Earthwatts 380D+4850 or you don't mind waiting for a rebate, you could get the Corsair 400CX which is $50-$10 MIR at Amazon instead of the Earthwatts.

Quote:

It's subjective, but here's a rough estimate for a decent psu:

300-400 W : 30-35 A
400-500 W : 35-40 A
500-600 W : 40-45 A
You get the drift

How can 12v power exceed the total? :na: 
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a b ) Power supply
May 1, 2010 3:59:34 PM

Quote:


How can 12v power exceed the total? :na: 

I did not list +12v power, I listed +12v currents in amperes.
For eg: Take the Corsair 400CX. Its total power is 400W & it has a single +12v rail which can provide 30 Amperes of current.

Quote:
300-400 W : 30-35 A
400-500 W : 35-40 A
500-600 W : 40-45 A


This means that for a good 300-400 W psu, the current on the +12v rail should be around 30-35 Amperes.
[/quotemsg]
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May 1, 2010 4:25:49 PM

would a 9600 gt or gso be good? my friend told me i should get a 9800gt but thats around 100$, so im not so sure if i want it.
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May 1, 2010 4:36:33 PM

id prefer under 80$ probably maybe 90.
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May 1, 2010 4:38:25 PM

I dont need max settings in games, just decent settings. :o 

sorry for being so picky.
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a c 248 ) Power supply
May 1, 2010 7:12:15 PM

The Corsair CX400 mentioned by jsc would be an appropriate choice providing you don't get carried away with a video card upgrade.

Corsair and Seasonic are two brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty.

Lately we've been seeing a few other brands offering some high quality units. One example would be the Antec Earthwatts and the Antec TruePower New series which are major improvements over Antec’s older psu’s like the Basiq models.
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May 2, 2010 7:48:24 AM

ksampanna said:
You mean the screem size is 21-23 ", & if that's the case, then the resolution is definitely more than 1400 X 800. Then the 5670 won't be able to give you good frame rates at max settings in most of the games.

Quote:
If i were to just buy a graphics card or something, would it be likely for my psu to blow my whole motherboard or anything like that? curious lol.


It won't blow your motherboard, but you will get artifacts on screen (small dots dancing around) when playing games due to the gpu not getting enough juice from the psu.

Quote:
how much amps per +12v would be considered good?

It's subjective, but here's a rough estimate for a decent psu:

300-400 W : 30-35 A
400-500 W : 35-40 A
500-600 W : 40-45 A
You get the drift


when i play one of my games, team fortress 2, i play on 1152 x 864, which is fine. just saying.
idk if that helps or means anything, but yeah.
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May 3, 2010 8:09:14 AM

ryancxg said:
would a 9600 gt or gso be good? my friend told me i should get a 9800gt but thats around 100$, so im not so sure if i want it.

The 4850 is comparable to the 9800GTX, so it's more powerful than either of those.
ryancxg said:
id prefer under 80$ probably maybe 90.

The 4850 i posted was $90 with the promo code "LADYBUG10".
ryancxg said:
when i play one of my games, team fortress 2, i play on 1152 x 864, which is fine. just saying.
idk if that helps or means anything, but yeah.

Is it a CRT or an LCD? If it's an LCD you get visual artifacts at any resolution other than the native resolution.
ksampanna said:

This means that for a good 300-400 W psu, the current on the +12v rail should be around 30-35 Amperes.

Still makes no sense. A 300w PSU can't have 12v current rating that high: 30A@12v = 360w. A 400w PSU could have a 30-33A of 12v current but not 34 or 35 since that would also be over it's max of 400w.
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a b ) Power supply
May 3, 2010 4:01:37 PM

AH the age of deception.
First looking at the +12V rails on multirail PSU. Manufs cut cost by using the same regulator on each rail. The sum of the currents will almost always (except on Higer end PSU) exceed the listed max. What this means is that on a PSU with 3 12 V rails rated at 18 Amps is that YOU can NOT draw 18 AMPs at the same time on all three rails. For example 18 x 3 x 12 = 640, BUT the PSU may list max 12 V power at 550 W. If you draw 16 Amps on rail 1 and 2 you can only draw
13.8 Amps (NOT 18 Amps) on rail 3.

2nd the overall power rating may place further limitations on what is really availble for the 12 V rail. Say the PSU in above example has a total wattage rating of 600 Watts with a 550 Watt rating on +12 V. If you were to draw say 80 Amps on the +5V, 3.3V and the other +5V then in reality only 520 Watts would be avail for the +12 V.

3rd - The cheaper the PSU, the greater the discrepency. Also with cheaper PSU, the ratings are for ambient temps - NOT real operating temps which further lowers the true available Power available (On cheap PSUs you could lose 25%/30% of advertized rating when operating @ 40 C. "Good" PSU's use a operating temp of 40/50C vs 22/30C to rate their PSUs.

Is the Rating game a LIE, NO - it the old LET-THE-BUYER- BEWARE.

MOST "GOOD" Psus come much closer in real life vs advertized ratings. Rail limitations on true single rail PSUs like corsair and some others do not have this problem.

I have a 600 Watt igreen PSU - All three rails have different Current limits ( the 3rd rail is limited to 4 Amps) and you can draw the rated amps on all three rails.

Note: AT work, so values used in my example are just for illustration purpose
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