Gtx 750 ti + i5 4440? please help

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Jon_88

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May 29, 2017
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Im very new to computers so i don't know much but im wondering if my computer can handle the gtx 750 ti.

my PSU says
DC OUTPUT: +3.3v, +5V, +12V1, +12V2, +5Vsb, -12V, 20.0A, 26.0A, 8.0A, 14.0A, 2.0A, 0.8A

MAX WATTAGE:130W MAX

Total Output continous shall not exceed 300W

could someone explain this to me and whether the gtx 750ti will be ok with my computer
 
Solution
Karadjgne
Anything 400w or better would be best. Cheapest option is probably the Corsair CX 430, but better quality would be Seasonic 400, Corsair 450 CXM, XFX 450 etc. Try and stay away from Evga B or off brand units, this includes those that are sold by Best Buy like Insignia etc.
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LinuxDevice

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May 20, 2017
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You don't know what the CPU, motherboard, hard drives, fans, etc., add up to. That video card would use about 75W. Many CPUs use enough power to put you close to the 300W mark...add in any hard drive and other items and at best you are probably close to the supply limits. Stability usually favors having a bit of extra head room for power, so you might want to consider getting at least a 450W supply.
 
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Ricky Omesmo

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I subscribe what LinuxDevice said and I would add that you should look at least for a bronze certificated and also search for a single +12V rail instead of two rails like the one you have.
 
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Jon_88

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May 29, 2017
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I found someone similar who had the same psu as me the model FSP300-60THA(1) one the person that answered his thread said there shouldn't be a problem powering the system configuration but what do you guys think? (other person had 300w power supply)

the gtx 750 ti minimum is 300w
 
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Ricky Omesmo

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It may boot and work but max power isn't everything when you are picking a power supply.
You will find very good explanations on TH forums but to put it simple, efficiency is a great factor and by the looks of model you said it delivers 70% at is best meaning that 300w*70%=210w. Certificates with bronze or above indicates that a power supply achieves efficiency higher than 82%.
Also the processor and graphics card are the components that normally use more current, they both use the +12V rail meaning that single rails with high current are the best suited for the job. This model only has 8A and 14A so at best I would say it will deliver 100~140w, barely to hold your system.
 
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Ricky Omesmo

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Apr 14, 2013
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It may boot and work but max power isn't everything when you are picking a power supply.
You will find very good explanations on TH forums but to put it simple, efficiency is a great factor and by the looks of model you said it delivers 70% at is best meaning that 300w*70%=210w. Certificates with bronze or above indicates that a power supply achieves efficiency higher than 82%.
Also the processor and graphics card are the components that normally use more current, they both use the +12V rail meaning that single rails with high current are the best suited for the job. This model only has 8A and 14A so at best I would say it will deliver 100~140w, barely to hold your system.
 
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Karadjgne

Karadjgne

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All that aside, the answer is no, it won't work. In a dual rail psu, (98% of them) both rails are actually tied together. A 750ti generally has @60w draw with a minimum requirement of a psu 18A at 12v. At a combined total of 264w on 12v, in an off brand psu, at best you'll be looking at about 150w of safe usage.
https://youtu.be/f6snWfd1v7M
Just because a manufacturer makes claims, unless its a known quality unit that's been thoroughly tested, you can figure anything over half as being dangerously close to needing a fire extinguisher. Pretty much you'll be close to running maximum output of the psu with anything more than simple windows usage.

Don't get 80+ efficiency ratings confused. If a psu says it's 70%efficient, at 300w max that would mean it'll actually pull 430w from the wall, the remaining 30% being wasted as heat.

Also rail count is rather unimportant in almost all cases, the only real difference being that multiple rail psus use smaller components per rail, but generally have higher current tolerances per rail, vrs a single rail that uses very high rated components. The rails are just run in parallel, all joined together at output. There's very, very few psus that have dedicated rails and normally these will be labeled cpu, mobo and accessories, pcie etc.
 
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Karadjgne

Karadjgne

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Anything 400w or better would be best. Cheapest option is probably the Corsair CX 430, but better quality would be Seasonic 400, Corsair 450 CXM, XFX 450 etc. Try and stay away from Evga B or off brand units, this includes those that are sold by Best Buy like Insignia etc.
 
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