[Solved] Best 450wt psu on a budget?

Hi
I have been looking for a 450wt psu for at most $70. I need it to be able to run a xfx radeon 5770 pcie card and need help. The card needs at least 450wts. Can anyone recommend to me a good psu that I can buy? I have a Dell inspiron 530(not the slim) and am looking for a compatible 450wt psu to go with the card. Thank you

Reply to ghost154230

Since you have the budget, consider getting this -

www.newegg.com/Product/Product.asp [...] 6817371044

You surely do not need that much power but it is a healthy investment for when you require to or feel like updating your system with some more power hungry components.

Reply to Emperus

Quote :

Since you have the budget, consider getting this -

www.newegg.com/Product/Product.asp [...] 6817371044

You surely do not need that much power but it is a healthy investment for when you require to or feel like updating your system with some more power hungry components.

Good PSU but two questions. first off why everywhere I search people say the card needs 450 wts? Second question will it be compatible with my 530 case(not the slim)? Thanks for your help

Message edited by ghost154230 on 06-14-2011 at 11:07:40 PM

Reply to ghost154230

A reference clocked Radeon HD 5770 graphics card has a maximum board power of 106 Watts. This means that the graphics card itself may draw up to a maximum of 8.8 Amps from the +12 Volt rails of the power supply unit.

For a single Radeon HD 5770 graphics card system AMD recommends a 450 Watt or greater power supply with at least one 75W 6-pin PCI Express power connector. What is even more important than wattage is that the power supply have a combined +12 Volt continuous current rating of 22 Amps or greater.

The following power supplies will more than meet your power requirements :

Corsair Builder Series CMPSU-430CXV2 for $44.99 has a +12V current rating of 28 Amps

Seasonic S12 II Bronze SS-430GB for $69.99 has a +12V current rating of 30 Amps

The power supply should conform to these dimensions and will properly fit in the Dell Inspron 530 chassis : 5.9" (W) x 3.4" (H) x 5.5" (D)

Message quoted 1 times

Reply to ko888

450w requirement is the manufactures suggestion because not all PSU are equal and many 450w units are lucky to bput out 300w in reality. Plus the 450w recommendation is for total system power, the card actually only uses Using a quality PSU that actually can meet its specs takes that worry of your hands. 450w is way more than enough to run Crossfire 5770's at full load.
Ilike to recommend the Cosair Builder series PSU's but if you have around a 300w unit already see if it will work. I dropped a 5760 into my grandsons Compaq with only a 230w psu and its working great.

Message quoted 1 times

Reply to popatim

ko888 wrote :

A reference clocked Radeon HD 5770 graphics card has a maximum board power of 106 Watts. This means that the graphics card itself may draw up to a maximum of 8.8 Amps from the +12 Volt rails of the power supply unit.

For a single Radeon HD 5770 graphics card system AMD recommends a 450 Watt or greater power supply with at least one 75W 6-pin PCI Express power connector. What is even more important than wattage is that the power supply have a combined +12 Volt continuous current rating of 22 Amps or greater.

The following power supplies will more than meet your power requirements :

Corsair Builder Series CMPSU-430CXV2 for $44.99 has a +12V current rating of 28 Amps

Seasonic S12 II Bronze SS-430GB for $69.99 has a +12V current rating of 30 Amps

The power supply should conform to these dimensions and will properly fit in the Dell Inspron 530 chassis : 5.9" (W) x 3.4" (H) x 5.5" (D)

Thanks for the reply but I have another question. My current PSU is oem 300wts and as far as I know it does now have a 6 pin pcie connector. Is there even possibility i could get the card running without having to buy another psu? thanks!

Message quoted 1 times

Reply to ghost154230

popatim wrote :

450w requirement is the manufactures suggestion because not all PSU are equal and many 450w units are lucky to bput out 300w in reality. Plus the 450w recommendation is for total system power, the card actually only uses Using a quality PSU that actually can meet its specs takes that worry of your hands. 450w is way more than enough to run Crossfire 5770's at full load.
Ilike to recommend the Cosair Builder series PSU's but if you have around a 300w unit already see if it will work. I dropped a 5760 into my grandsons Compaq with only a 230w psu and its working great.

Is there any way of knowing whether the psu can handle the card beforehand? I do not want to fry my components, thanks!

Reply to ghost154230

ghost154230 wrote :

Thanks for the reply but I have another question. My current PSU is oem 300wts and as far as I know it does now have a 6 pin pcie connector. Is there even possibility i could get the card running without having to buy another psu? thanks!

The Inspiron 530 that included a Quad core processor came with the 350 Watt power supply that did have one 6-pin PCI Express supplementary power connector.

I would guess that your 300 Watt power supply unit has a +12 Volt current rating of 18 Amps. I had specified 22 Amps as the safe minimum current rating.

Since the Radeon HD 5770 requires a 75 Watt 6-pin PCI Express supplementary power connector to be able to run you would need to obtain the power from somewhere. There doesn't appear to be any 4-pin Molex connectors on that 300 Watt power supply so there is no way to tap into that.

I dont know what you meant by "... as I know it does now have a 6 pin pcie connector. ...". Do you mean it doesn't have a 6-pin PCI Express supplementary power connector?

Over-stressing a power supply by drawing close to its maximum power limit will drastically shorten the life of the power supply unit by overheating it.

I don't think you have any choice of whether or not you need to replace the power supply. You have to.

Message quoted 1 times

Reply to ko888

I have been overclocking my CPU and GPU using this SeaSonic unit with no problems: http://www.newegg.com/Product/Prod [...] =eco%20520

------------------------------ ASRock Z77 Pro3
i5 2500K@4Ghz
HyperX 8gb 1333
Crucial M4 64gB
Reply to cronos177

ko888 wrote :

The Inspiron 530 that included a Quad core processor came with the 350 Watt power supply that did have one 6-pin PCI Express supplementary power connector.

I would guess that your 300 Watt power supply unit has a +12 Volt current rating of 18 Amps. I had specified 22 Amps as the safe minimum current rating.

Since the Radeon HD 5770 requires a 75 Watt 6-pin PCI Express supplementary power connector to be able to run you would need to obtain the power from somewhere. There doesn't appear to be any 4-pin Molex connectors on that 300 Watt power supply so there is no way to tap into that.

I dont know what you meant by "... as I know it does now have a 6 pin pcie connector. ...". Do you mean it doesn't have a 6-pin PCI Express supplementary power connector?

Over-stressing a power supply by drawing close to its maximum power limit will drastically shorten the life of the power supply unit by overheating it.

I don't think you have any choice of whether or not you need to replace the power supply. You have to.

Thanks again for the answer. One last question. Is it true that only atx psus run on inspiron 530s? Finally if I get a good seasonic psu,and the radeon 5770, will i be able to install them and fit or should there be any problems to anticipate? If not then will i be ready to go? Thanks!

Message quoted 1 times

Reply to ghost154230

ghost154230 wrote :

Thanks again for the answer. One last question. Is it true that only atx psus run on inspiron 530s? Finally if I get a good seasonic psu,and the radeon 5770, will i be able to install them and fit or should there be any problems to anticipate? If not then will i be ready to go? Thanks!

If the power supply has an ATX form factor and follows the ATX12V v2.3 standard with the dimensions 5.9" (W) x 3.4" (H) x 5.5" (D) you will have no compatibility problems.

Message quoted 1 times

Reply to ko888

ko888 wrote :

If the power supply has an ATX form factor and follows the ATX12V v2.3 standard with the dimensions 5.9" (W) x 3.4" (H) x 5.5" (D) you will have no compatibility problems.

Thank you! So with a 380wt psu you reccomended and the xfx radeon 5770 inside a dell inspiron 530. Will it all work? I just want to be extra sure so I can begin to order the parts. Will I need anything else. I have a intel duo core with 3 gigs of ram and 2.6ghz. Thank you!

Message quoted 1 times

Reply to ghost154230

ghost154230 wrote :

Thank you! So with a 380wt psu you reccomended and the xfx radeon 5770 inside a dell inspiron 530. Will it all work? I just want to be extra sure so I can begin to order the parts. Will I need anything else. I have a intel duo core with 3 gigs of ram and 2.6ghz. Thank you!

What 380 Watt power supply are you referring to?

The two power supplies that I had recommended are both 430 Watts. They both have the same physical dimensions and are able to supply more than sufficient power.

Message quoted 1 times

Reply to ko888

Here is the most accurate estimate you can get in the net: http://extreme.outervision.com/psucalculatorlite.jsp

Message quoted 1 times

------------------------------ ASRock Z77 Pro3
i5 2500K@4Ghz
HyperX 8gb 1333
Crucial M4 64gB
Reply to cronos177

ko888 wrote :

What 380 Watt power supply are you referring to?

The two power supplies that I had recommended are both 430 Watts. They both have the same physical dimensions and are able to supply more than sufficient power.

Yeah those my bad. So everything should work right? Thanks

Message quoted 1 times

Reply to ghost154230

cronos177 wrote :

Here is the most accurate estimate you can get in the net: http://extreme.outervision.com/psucalculatorlite.jsp

Thanks ill try this tool out

Reply to ghost154230

ghost154230 wrote :

Yeah those my bad. So everything should work right? Thanks

Yes.

You could also get the Antec EA-380D Green for $39.99. It has a +12 Volt current rating of 28 Amps and has as its dimensions 5.9" (W) x 3.4" (H) x 5.5" (D). Antec says that "No power cord included. By reusing your existing cord, you can reduce waste and help protect the environment."

Message quoted 1 times
Message edited by ko888 on 06-15-2011 at 02:34:28 AM

Reply to ko888

ko888 wrote :

Yes.

You could also get the Antec EA-380D Green for $39.99. It has a +12 Volt current rating of 28 Amps and has as its dimensions 5.9" (W) x 3.4" (H) x 5.5" (D). Antec says that "No power cord included. By reusing your existing cord, you can reduce waste and help protect the environment."

so although this psu says it has a max wts of 380 since irs continous it wont matter right?so although the card asks for it this is enough to run the card and a few other basic computer components such as the hard drive. If it wil than I think this psu is perfect and even eco friendly! Thanks and sorry for the spelling im typing on a buggy smartphone keyboard

Message quoted 1 times

Reply to ghost154230

Best answer

ghost154230 wrote :

so although this psu says it has a max wts of 380 since irs continous it wont matter right?so although the card asks for it this is enough to run the card and a few other basic computer components such as the hard drive. If it wil than I think this psu is perfect and even eco friendly! Thanks and sorry for the spelling im typing on a buggy smartphone keyboard

Yes. The power supply's wattage is not the critical specification. The +12 Volt current rating is the most important specification.

Message quoted 1 times

Reply to ko888

Best answer selected by ghost154230.

Reply to ghost154230

ko888 wrote :

Yes. The power supply's wattage is not the critical specification. The +12 Volt current rating is the most important specification.

I almost forgot! Will my current power cable be able to replace the miising one?no conpatability issued? Thanks for what its worth yiu have helped much. Thanks again for listening and replying!

Message quoted 1 times

Reply to ghost154230

ghost154230 wrote :

I almost forgot! Will my current power cable be able to replace the miising one?no conpatability issued? Thanks for what its worth yiu have helped much. Thanks again for listening and replying!

Yes.

Reply to ko888

Forum CPU & Components : Power Supplies, Cases & Mods [Solved] Best 450wt psu on a budget?

CPUs

Power Supplies, Cases & Mods

Sound Cards

Servers

NICs

Other Components

Akasa

Antec

Cooler Master

Cougar

DeepCool

Enermax

Please mind