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Help needed with Power Supply

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  • Power Supplies
  • Computers
  • Components
Last response: in Components
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April 1, 2013 3:33:44 AM

I am confused with PSU.
Below are my computers specifications :

Processor :
Intel i5 3570k

Graphic Card :
Sapphire Dual X Hd 7870 2gb ddr-5 Boost XT

Ram :
2*4GB Transcend 1600MHZ

Motherboard :
ASRock Z77 Extreme4 Motherboard

Case :
Cooler Master HAF 912 Combat

Hard Disk :
WD Caviar Green 1TB

CD Reader :
LG DVD Writer

Cooler :
Corsair h60

How much PSU do i need ?

More about : needed power supply

April 1, 2013 3:43:59 AM

your question has been answered before:
http://www.tomshardware.co.uk/forum/385120-33-7870-powe...

AMD website says:
http://www.amd.com/us/products/desktop/graphics/7000/78...

So I would say 500 watt 80% plus PSU will do just fine. Or buy a bit more if you are thinking to hook up more hardware like HD, etc. Your setup is default, because you have only one VGA, HD, Motherboard, etc. So the default wattage mentioned by AMD will be enough

Next time Try Google or other search engine with words like: 7870 wattage draw. These questions have been answered many times already.

I would go
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a b ) Power supply
April 1, 2013 3:48:09 AM

You'll need 500W PSU (450W would work) but go for 500W.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

This one is nice, powerfull and will run your rig without any problems. If you wan't crossfire one day you'll need to go up with wattage. So if no crossfire needed this one is good choice. If you are short on money Corsair has some affordable models.

Best regards :) 
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a c 75 ) Power supply
April 1, 2013 8:18:13 AM

Agreed. A reliable 500/550W unit is a good choice.
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April 1, 2013 8:50:01 AM

I have a PSU of 450 W from intex.
Will it be fine ?
Will it harm the other components in any way ?
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a b ) Power supply
April 1, 2013 9:16:28 AM

rohit_s03 said:
I have a PSU of 450 W from intex.
Will it be fine ?
Will it harm the other components in any way ?


Consider new one, more quality PSU cause less capable PSU can damage your components. This one will not run you rig. It's 15$ PSU. Probably more like 200W PSU rather than 450W.

Best regards :) 
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April 1, 2013 10:21:52 AM

Feldmarschall said:
rohit_s03 said:
I have a PSU of 450 W from intex.
Will it be fine ?
Will it harm the other components in any way ?


Consider new one, more quality PSU cause less capable PSU can damage your components. This one will not run you rig. It's 15$ PSU. Probably more like 200W PSU rather than 450W.

Best regards :) 



Can you suggest me a good PSU
Will be used for gamming
I will be buying it in india

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Best solution

a c 1218 ) Power supply
April 1, 2013 10:27:15 AM

For a system using a single reference clocked Radeon HD 7870 Boost Edition graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 35 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

Overclocking of the CPU and/or GPU(s) will require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

The Intex 450 Watt (IT-2045S), with its maximum combined +12 Volt continuous current rating of 20 Amps and with no PCI Express supplementary power connectors, is grossly insufficient to power your system configuration with a single Radeon HD 7870 Boost Edition graphics card.
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April 1, 2013 12:51:11 PM

ko888 said:
For a system using a single reference clocked Radeon HD 7870 Boost Edition graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 35 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

Overclocking of the CPU and/or GPU(s) will require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

The Intex 450 Watt (IT-2045S), with its maximum combined +12 Volt continuous current rating of 20 Amps and with no PCI Express supplementary power connectors, is grossly insufficient to power your system configuration with a single Radeon HD 7870 Boost Edition graphics card.



Will this do :
http://www.corsair.com/enthusiast-series-modular-tx650m...

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a c 1218 ) Power supply
April 1, 2013 1:45:06 PM



The Corsair Enthusiast Series Modular TX650M (SKU# 75-001316 / CP-9020002), with its maximum combined +12 Volt continuous current rating of 54 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is way more than sufficient to power your system configuration with a single Radeon HD 7870 Boost Edition graphics card.
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April 1, 2013 9:31:32 PM

ko888 said:


The Corsair Enthusiast Series Modular TX650M (SKU# 75-001316 / CP-9020002), with its maximum combined +12 Volt continuous current rating of 54 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is way more than sufficient to power your system configuration with a single Radeon HD 7870 Boost Edition graphics card.


Thanks a lot...:pt1cable: 

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