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Upgrading PSU in HP p6270z from 300w to 600w or more. What's best?

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January 22, 2012 8:11:15 PM

So, my HP p6270z currently has a 300w PSU but I would like upgrade it to the cheapest 600w or greater PSU that will fit in it. Any recommendations on which ones will work for me?

I'm gonna take a shot in the dark, but, will this one fit?
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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a c 1195 ) Power supply
a b α HP
January 22, 2012 9:13:25 PM

The Radeon HD 6970 is a 300 Watt card and the Radeon HD 7970 is a 250 Watt card so I'll use the Radeon HD 6970 as the reference for determining the power supply requirement.

For a system using a single Radeon HD 6970 graphics card AMD specifies a minimum of a 550 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 38 Amps or greater and have at least one 6-pin and one 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT a crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important.

Seasonic S12II 620 Bronze 620W for $69.99
• combined +12 Volt continuous current rating of 48 Amps
• one 6-pin and one (6+2)-pin PCI Express supplementary power connectors

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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January 22, 2012 10:16:13 PM

Thank you so much for the advice! I think I have picked a winner!
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January 22, 2012 10:19:13 PM

One more question, though:

Do the PSU dimensions have to be EXACTLY the same as the old one in order to fit?
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a c 1195 ) Power supply
a b α HP
January 22, 2012 10:23:30 PM

TurboDiesel6point7 said:
One more question, though:

Do the PSU dimensions have to be EXACTLY the same as the old one in order to fit?

A Standard ATX form factor power supply has the following dimensions:

150mm W x 86mm H x 140mm D

or

5.9"W x 3.4"H x 5.5"D

The width and height are standardized.

The depth will vary depending on the power capacity of the power supply unit.
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January 22, 2012 11:30:38 PM

Ok. It seems my current PSU has the same width and height and very similar depth to the PSU I am looking at, which is:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Is this a good PSU?
I also have decided on my card, which will actually be a 6870 rather than a 6970:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
The PSU I have my eyes on will not only has the 12v+ amperage to run a 6870 but also a 6970 if I need to. The only issue I can find is that, according to Newegg, the PSU has one 6-pin PCI and one 6+2-pin PCI, but the 6870 needs 2 6-pin PCI's.

Will I be able to take of the extra two pins on the one "6+2" PCI cord in order to make 2 6-pin PCI cords or will I need to buy an adapter? If I need to buy an adapter, which one would you all recommend for this PSU and HD 6870?

Does anyone else see any other issues with this potential final PSU/GPU combination?

Thanks again!

TurboDiesel6point7
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a c 111 ) Power supply
January 22, 2012 11:32:24 PM

Yep that antec psu is a pretty solid unit!
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January 22, 2012 11:43:15 PM

What about that 6+2 pin PCI connector? Can that be turned into a 6-pin PCI connector?
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a c 1195 ) Power supply
a b α HP
January 22, 2012 11:43:39 PM

For a system using a single Radeon HD 6870 graphics card AMD specifies a minimum of a 500 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 30 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

The Antec Neo ECO 620C, with its +12 Volt continuous current rating of 48 Amps and with its one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power a system using a single Radeon HD 6870.



You can use just the 6-pin portion or both the 6-pin and the 2-pin together to form an 8-pin connector. There's no need to buy or use any adapters.
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a c 111 ) Power supply
January 22, 2012 11:48:11 PM

Just use the 6 pin and leave the other 2 pin hanging!
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January 23, 2012 12:04:47 AM

Yes! Thanks to everybody for helping me formulate my new mods!

Here is my current setup:
AMD Athlon II X4 630 Quad 2.8GHz
8gb DDR3 RAM
XFX HD 6570 1GB DDR3
300W PSU
1TB 7200rpm
Windows 7 Pro 64 Bit

Changes:
New PSU: Antec 620W
New GPU: Diamond HD 6870
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!