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Need New Power Supply

After building a computer up from scratch save for some ddr3 memory and the power supply, i discovered that my motherboard has two 8-pin ATX 12V (PW12-1 & PW12-2) power connections, for which i have only 1 cord for. Assuming that my power supply is inadequate as the computer flickers to life for approximately a millisecond before going silent, i am in the market for a new one. However i have limited experience in buying supply's and would value some input upon recommendations for my system.


HDD: Western Digital Caviar blue 640GB
http://www.amazon.com/Western-Digital-Caviar-Drive-WD6400AAKS/dp/B0017XUX7O

Case: Cooler Master CM 690 II System Cabinet - Mid-tower - Black
http://www.overstock.com/Electronics/Cooler-Master-CM-690-II-System-Cabinet-Mid-tower-Black/4589906/product.html?cid=202290&kid=9553000357392&track=pspla&adtype=pla&kw={keyword}

Motherboard:EVGA - Z68 FTW Desktop Motherboard - Intel - Socket H2 LGA-1155
http://www.bestbuy.com/site/EVGA+-+Z68+FTW+Desktop+Motherboard+-+Intel+-+Socket+H2+LGA-1155/4698796.p?id=1218509109236&skuId=4698796

Graphics card:Galaxy GeForce GTX 560
http://www.galaxytech.com/__en_gb__/Product13.aspx

CPU: Intel i7 2600
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115071&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-NA-_-NA

RAM: 4GB Dual Channel Corsair DDR3 Memory
http://www.amazon.com/Corsair-Channel-Memory-Processors-CMX4GX3M2A1600C9/dp/B002LE8D2A
7 answers Last reply Best Answer
More about need power supply
  1. Here's a power supply that meets your needs:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371053
    High Current Pro HCP-850 850W TX12V v2.3 / EPS12V v2.92 SLI Certified CrossFire Certified 80 PLUS GOLD Certified Modular Active PFC Power Supply
  2. Best answer
    even an hcg 620 would be enough^
  3. I Would like to thank the both of you for your fast and valuable input. however i have concerns about the hcg 620, its connecters are listed as 1 x 4+4 and 2 x 6+2's it makes me feel like i would be able to power my motherboard but my graphics card which has 2 x 6 slots for its power would have to suffer sharply in performance or be underpowered, are my concerns unfounded?
  4. For a system using a single GeForce GTX 560 graphics card NVIDIA specifies a minimum of a 450 Watt or greater power supply that has a combined +12 Volt continuous current rating of 24 Amps or greater and that has at least two 6-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.

    Even the Antec EarthWatts Platinum Series 450W (EA-450 Platinum), with its combined +12 Volt continuous current rating of 34 Amps and with its two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system with a single GeForce GTX 560.

    A single (4+4)-Pin ATX/EPS connector connected to the motherboard is more than sufficient for the Core i7-2600 CPU that you are using.
  5. The 4+4 and 6+2 connectors are to improve compatibility. The 4+4 works with 4 pin and 8 pin CPU power connectors, the 6+2 pin PCI-e connectors work as 6 pin connectors or as 8 pin connectors, in your case you would just leave the two extra pins on each one hanging off when you hook the 6+2's into the 6 pin slots on the GPU so it won't be underpowered, it will be power appropriately.
  6. Best answer selected by spoonalot.
  7. This topic has been closed by Nikorr
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