I currently have a ga-78lmt-s2 motherboard with an amd fx-4300 cpu. A regular dvd drive and a 1 tb harddrive. I also have a NVIDIA GeForce GT 610 graphics card and two fans in the case. All of this is being run on a thermaltake purepower atx 12v 350w power supply. Im looking to upgrade my video card to an Asus GeForce gtx 750 ti OC 2gb. I have been doing quite a bit of research but cannot find out if this will work with my current power supply. Just by looking at the insides I believe it will not work based on the cords. If that is the case I am looking to upgrade my power to a corsair builder series CX430 430w power supply. My only problem is that it looks like it has different cords from what I currently have which is creating a lot of confusion. I am not experienced in computer parts so I have very little idea about what I am looking at or what is what in terms of compatibility. Any help would be great.
Upgrading video card. Need new power supply?
- Thread starter Armothis
- Start date
Solution
gregbattis
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- Aug 9, 2012
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Use this calculator and add 50w to it and see. http://www.extreme.outervision.com/psucalculatorlite.jsp
Dark Lord of Tech
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A couple of the 750ti's do use a 6 pin , just make sure your version doesn't and you should be ok.
I understand that the card can work with the 350w power supply but it does not look like I have the right cords (6 pin connector) to use the cord. I am wondering if the power supply that I a have mentioned and am looking at will work or if the one I already have works and I just don't know that
Dark Lord of Tech
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I would upgrade to the CX430 , so that you have the PCIE power connection if your card needs it.
photonboy
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Theoretically it can work depending on whether you overclock the CPU or not.
The FX-4300 with a basic video card uses about 136Watts under load.
http://www.anandtech.com/show/6396/the-vishera-review-amd-fx8350-fx8320-fx6300-and-fx4300-tested/6
The Asus 750Ti uses about 74W max if not overclocked further.
http://www.techpowerup.com/reviews/ASUS/GTX_750_Ti_OC/23.html
That's roughly 200Watts (about 210W but there's no basic GPU now so I deducted about 10W for its idle power under the CPU system test).
200/350 = 57% load on power supply
Yes, the Asus GTX750Ti has a 6-pin connector but the max (before further overclock) is 74W which the motherboard is rated to supply through the power supply mains 12V.
Thus, any additional power via the 6-pin connector would not be very much at all even if you slightly overclock. The included 4-pin Molex-to-6-pin adapter should easily provide enough power. A computer PSU probably supplies at least 90% of its rated power through the 12V rail so it should have plenty left for the graphics card.
(The 6-pin connector uses 12V as does the MOLEX 4-pin. The only reason for the 6-pin connector specifically is to guarantee enough power but adapters work fine provided you know that the PSU can provide enough power.)
So...
It SHOULD work in my opinion. If you decide to overclock the CPU and GPU and have several hard drives and fans I would not recommend the same PSU though.
I wouldn't get the CX430 either. Do a bit of research and get something better. I got the Antec VP-450 after the CX430 blew up on me. That Antec is better though not the best. Statistically any PSU can die on you.
The FX-4300 with a basic video card uses about 136Watts under load.
http://www.anandtech.com/show/6396/the-vishera-review-amd-fx8350-fx8320-fx6300-and-fx4300-tested/6
The Asus 750Ti uses about 74W max if not overclocked further.
http://www.techpowerup.com/reviews/ASUS/GTX_750_Ti_OC/23.html
That's roughly 200Watts (about 210W but there's no basic GPU now so I deducted about 10W for its idle power under the CPU system test).
200/350 = 57% load on power supply
Yes, the Asus GTX750Ti has a 6-pin connector but the max (before further overclock) is 74W which the motherboard is rated to supply through the power supply mains 12V.
Thus, any additional power via the 6-pin connector would not be very much at all even if you slightly overclock. The included 4-pin Molex-to-6-pin adapter should easily provide enough power. A computer PSU probably supplies at least 90% of its rated power through the 12V rail so it should have plenty left for the graphics card.
(The 6-pin connector uses 12V as does the MOLEX 4-pin. The only reason for the 6-pin connector specifically is to guarantee enough power but adapters work fine provided you know that the PSU can provide enough power.)
So...
It SHOULD work in my opinion. If you decide to overclock the CPU and GPU and have several hard drives and fans I would not recommend the same PSU though.
I wouldn't get the CX430 either. Do a bit of research and get something better. I got the Antec VP-450 after the CX430 blew up on me. That Antec is better though not the best. Statistically any PSU can die on you.
photonboy
Titan
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PSU tier list: http://www.tomshardware.com/forum/id-1804779/power-supply-unit-tier-list.html
From 2013 but you may find it useful. Also many PSU's on the list are still sold. I would say roughly don't go below TIER 3.
Maybe someone has a more recent link?
Update:
About NOISE. Even if your 350W is fine which it should be, if you have a few fans, drives, overclock etc you may end up over 70% load which may be fairly noisy.
It's likely a 450W (or better yet 550W) PSU would be much quieter. Roughly speaking many PSU's spin down to their lowest fan speed at 50% load or lower then the speed (and thus noise) ramps up as you go above 50% load. The QUALITY of the design and fan used significantly affects noise as well.
Example PSU (USA link): http://pcpartpicker.com/part/corsair-power-supply-cs550m
If you used 225W you'd still be at the quietest speed and 550W likely and it's also nice to have a bit more power for a better video card or use with a new system.
From 2013 but you may find it useful. Also many PSU's on the list are still sold. I would say roughly don't go below TIER 3.
Maybe someone has a more recent link?
Update:
About NOISE. Even if your 350W is fine which it should be, if you have a few fans, drives, overclock etc you may end up over 70% load which may be fairly noisy.
It's likely a 450W (or better yet 550W) PSU would be much quieter. Roughly speaking many PSU's spin down to their lowest fan speed at 50% load or lower then the speed (and thus noise) ramps up as you go above 50% load. The QUALITY of the design and fan used significantly affects noise as well.
Example PSU (USA link): http://pcpartpicker.com/part/corsair-power-supply-cs550m
If you used 225W you'd still be at the quietest speed and 550W likely and it's also nice to have a bit more power for a better video card or use with a new system.
Dark Lord of Tech
Retired Moderator
- Aug 18, 2009
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http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=239 < Version 2
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=214 < 1st version
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=214 < 1st version
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