Nvidia GTX 750Ti and 650 Watt PSU : Compatibilty

Sharan Mohandas

Reputable
Jul 27, 2015
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Greetings Guys,

I plan to buy the Following components for my rig

Proposed items

  • Gigabyte NVIDIA GTX 750 Ti 2 GB GDDR5 Graphics Card
    Corsair VS650 650 Watt PSU
    Corsair Vengeance DDR3 8 GB (1 x 8 GB) PC DRAM (CMZ8GX3M1A1600C10)

Current System Configuration

  • Intel® Core™ i5-4440 Processor (6M Cache, at 3.10 GHz)
    Gigabyte H81M-S Motherboard
    4 GB ADATA DDR3 RAM 1600 MHz
    250 Watts PSU (Came along with Cabinet)

The Graphics Card requires 400 Watts. I plan to purchase 650 Watts because I wont need to have to think about Power Requirements in future.. But would there be any problem if I buy a high powered PSU... Sorry I'm a n00b in case of Hardware,

Please advise...
PS : I am a casual Gamer.
 
Solution
Change RAM to 2x4GB(1600MHz) instead of 1x8GB because you get 15% better speed with 2x4GB cuz your motherboard supports dual channel memory. Get xfx or EVGA PSU instead of corsair because they are better quality for the same price (if there's big difference in price in your country then go for corsair I guess)

There won't be any problem if you buy more watts than you need as long PSU works on 40-75% of its power. (if it works under 20% of it's power then you can damage it but that rarely happens, especially if it's a good quality PSU) In your case you will be using around 50%-60% power from 650W PSU

Proofy

Admirable
Change RAM to 2x4GB(1600MHz) instead of 1x8GB because you get 15% better speed with 2x4GB cuz your motherboard supports dual channel memory. Get xfx or EVGA PSU instead of corsair because they are better quality for the same price (if there's big difference in price in your country then go for corsair I guess)

There won't be any problem if you buy more watts than you need as long PSU works on 40-75% of its power. (if it works under 20% of it's power then you can damage it but that rarely happens, especially if it's a good quality PSU) In your case you will be using around 50%-60% power from 650W PSU
 
Solution
The system will only draw the power it needs so you can use a big PSU no problem. It will not hurt anything or waste power. 650 watts will allow you to upgrade the GPU again in the future without needing another new PSU.

This Corsair would be better quality than the VS series-
http://m.snapdeal.com/product/corsair-rm-series-rm650-650w/716852903?tag=
 
PSU will be damaged if it works below 20%...where the hell did you get that?

PSU will draw as much as power as needed but will reach the specified efficiency only on certain load range.
Having a PSU to work way below 50% load will end up nothing more than having the PSU not running on it's full efficiency.
It will still not go down far from the specified efficient tho'.
and...it will still run properly and will not be damaged.
There is no real disadvantages of having bigger PSU beside that you just usually have to pay more for bigger PSU.
 
This topic is dead since years, PSUs are no longer damaged if you go really low on load.
All famous PSU manufacturers are already fully aware of this issue and have designed their PSU not to do that.
Latest and most PSUs are even designed to support Intel's deep slumber states.
If the system is going into really deep slumber, it will consumes max 1-5% of the PSU specified load.