500w PSU with 660 Ti?

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GigabyteBOYS

GigabyteBOYS

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Apr 13, 2015
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Hi there. I'm wondering if my power supply will be able to cope with a 660 Ti graphics card. I've read that the 660 Ti requires 2 6-pin connectors but the PSU I'm using only has one 6-pin connector. However, it does have 3, 4-pin molex connectors. So would I have to get a splitter and connect two of the 4-pin molex connectors with something like this:
My CPU is an Amd FX-4130 and I'm currently using a GT 630 and I am using the Gigabyte 78LMT-USB3. The PSU I am using is the Atrix Expert 500W PSU:
 
Solution
ko888
For a system using a single GeForce GTX 660 (non-Ti) graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector. (Minimum system power requirement based on a PC configured with an Intel Core i7 3.2GHz 130 Watt TDP processor.) An exception is the MSI GeForce GTX 660 HAWK 2 GB. It requires two 6-pin PCI Express supplementary power connectors and a maximum combined +12 Volt continuous current rating of 30 Amps or greater (i.e. based on its maximum power draw).

Face it. Your...
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ko888

ko888

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Feb 18, 2009
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Minimum of a 450 Watt or greater system power supply with a maximum combined +12 Volt continuous current rating of 24 Amps or greater and with at least two 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in determining power supply adequacy!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor.

The GPU gets all of its power from the +12V rail. The graphics card gets almost all of its power from the +12V rail (< 10W comes from the +3.3V rail).

Your Atrix Expert 500W only has a maximum combined +12 Volt continuous current rating of 18 Amps. Using 4-pin Molex to 6-pin PCI-E adapter cables will only overload the power supply unit and possibly cause it to burn out and destroy other components attached to it.
 
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GigabyteBOYS

GigabyteBOYS

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Apr 13, 2015
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Hmm... What about just the 660, not Ti?
 
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990
For a system using a single GeForce GTX 660 (non-Ti) graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector. (Minimum system power requirement based on a PC configured with an Intel Core i7 3.2GHz 130 Watt TDP processor.) An exception is the MSI GeForce GTX 660 HAWK 2 GB. It requires two 6-pin PCI Express supplementary power connectors and a maximum combined +12 Volt continuous current rating of 30 Amps or greater (i.e. based on its maximum power draw).

Face it. Your PSU is based on the really old ATX12V Version 1.3 standard from April 2003 where the +12V rail(s) are grossly insufficient for modern systems that draw most of their power from the +12V rail(s). Your Atrix Expert 500W produces more than half (269 Watts) of its capacity on the minor rails (+3.3V & +5V rails). Its +12V rail is only 43% of the PSU's capacity.

On a modern 500W ATX12V Version 2.4 PSU the +12V rail is over 93% of the PSU's total capacity.
 
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Solution
ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990


That model has a high return rate due to failure.

This one is much better in terms of electrical performance and build quality:

SuperFlower Leadex GOLD 650W (SF-650F14MG) Black color
http://www.amazon.co.uk/Super-Flower-SF-650F14MG-SuperFlower-Modular/dp/B00H5D31SS/ref=sr_1_2?s=computers&ie=UTF8&qid=1429030719&sr=1-2&keywords=Super+Flower+SF-650F14MG

or SuperFlower Leadex GOLD 650W (SF-650F14MG) White color
http://www.amazon.co.uk/Super-Flower-SF-650F14MG-white-SuperFlower/dp/B00PHWZETS/ref=sr_1_1?s=computers&ie=UTF8&qid=1429030719&sr=1-1&keywords=Super+Flower+SF-650F14MG
 
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