Help needed with Power Supply

rohit_s03 · Apr 1, 2013

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 ?

turtlespeed · Apr 1, 2013

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

AMD website says:
http://www.amd.com/us/products/desktop/graphics/7000/7870/Pages/radeon-7870.aspx

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

Feldmarschall · Apr 1, 2013

You'll need 500W PSU (450W would work) but go for 500W.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151094

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

Novuake · Apr 1, 2013

Agreed. A reliable 500/550W unit is a good choice.

rohit_s03 · Apr 1, 2013

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

Feldmarschall · Apr 1, 2013

rohit_s03 :

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

rohit_s03 · Apr 1, 2013

Feldmarschall :

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

Feldmarschall · Apr 1, 2013

This one is very good choice as stated above http://www.newegg.com/Product/Product.aspx?Item=N82E16817151094

Can you afford it?

ko888 · Apr 1, 2013

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.

turtlespeed · Apr 1, 2013

search on google.com with words "best brand psu"
Search result google link at top: http://www.tomshardware.co.uk/forum/323296-28-best-brands

I would also recommend Fortron: it's not well known, but they used to make for other good brands as well.
I have a Fortron 500 watt 85% efficiency, for about 42 euro, that is about $40. It's quiet and does the job well.

http://www.tomshardware.co.uk/forum/117136-28-fortron

rohit_s03 · Apr 1, 2013

ko888 :

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-80-plus-bronze-certified-650-watt-high-performance-modular-power-supply.html

ko888 · Apr 1, 2013

rohit_s03 :

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.

rohit_s03 · Apr 2, 2013

ko888 :

rohit_s03 :

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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Help needed with Power Supply

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