Hi, I'm trying to choose the right UPS for my new computer. The PSU I would like to have is Corsair CMPSU-750TXEU - 750W. What do you think about it? This computer will be used for gaming and work, it will run on Intel Core i7 920, with one nVidia 285 GTX card, 22' monitor and 1 sata 2 hard drive. Is it possible to choose UPS with a lower wattage (I will need the batteries when I work to save my progress - working with text documents)? The other reason I would like to buy it, is to have anti surge protection for my PSU and to have good signal from power source for the PSU. What is your opinion on this? Or should I go for 1300VA?
I have the Corsair TX 750 in my rig and like it...I do not use my rig games...So it is an over kill...but I am not sorry about that. What one needs to know about...the relation of the negative effects of heat on the computer...That can be caused by the power supply. Manufacturers test their PSU's at a set temperature...from this their rating is determined... for most this No. is 25 degrees Celsius...which falls short of the temperature that most computers are capable of achieving. Given that a PSU will actually lose 2-5 watts per one degree of heat above the 25 Degree Celsius testing temperature...coupled with the fact that computers tend to run at 10 degrees higher than room temperature... In the summer time when the room temperature can easily reach 80 degrees F... your computer will be running at 33 Degrees C. or 90 Degrees F. So the...math can make...your 500 watt power supply into a 460 watt unit. In addition to this...what needs to be taken into account is that each degree that your computer components are operating at...under powered...adds more heat to the equation. Consider also...the possibility...that ratings given by the manufacturer of single components...such as graphics cards...need to be treated with skepticism... Manufacturers may minimize support issues and under rate the power required...in order to make a larger profit. The above has not taken into account...the issue of high quality vs poor quality units...Power supplies convert voltages from wall outlets to lower levels used by the PC. During this conversion, some power is lost as heat. The efficiency level of the PSU determines how much extra power must be put into the power supply to run the PC. A high quality PSU can help reduce the noise and heat generated within a computer system. The higher the efficiency rating the less heat the PSU has to deal with. Therefore heat is the computers enemy...The hotter the temperature your PSU is forced to run at...the poorer the supply of power the rest of the components will receive...which has been known to lead to such things as crashes, freezing, rebooting, BSOD’s, and video distortion, as well as partial and complete failure of other components. The fact is very few PSU’s are capable of producing the wattage that the companies advertise. For a very good comprehension of recommended brand names, wattage, and models in listed categories...Plus much more...check out this link. Power Supply Information and Selection - Tech Support Forum
^well for one, psu's are under rated at what they can handle temperature wise, and as long as the psu has a fan in it larger then 80mm temperature is not the problem. Psu's wattage are measured at their peek capabilities, not the average, that is why the rating on a psu say 500W may only be about 480w. Not because if it heats up the wattage it can produce lowers. But the thing to remember is that wattage is not the most important thing when it comes to psu's net jockey. The amperage on the 12v rail(s) is. So, the heat of the ps does not cause the crashes it is the amperage, or wattage becaoming to low for the computer to run at. This usually only happens when the psu is reaching the end of it's life, when it is dying, or it is not powerfull enough in the first place to run the computer. as long as you buy a ups from a quality brand then you should not have any problem with it. Know that the battery in ups's has to be replaced every few years because it will no longer hold it's charge.
Well Luke...You are certainly welcome to your opinion...But I am not buying it. Cheers. Edit:What one needs to know about...the difference between Quality PSUs as opposed Poor quality units...and the effects of heat on your computer. Most poor quality units...are tested at 25 degrees Celsius ...from this their rating is determined... which falls short of the temperature that most computers are capable of achieving. Given that a PSU will actually lose 2-5 watts per one degree of heat above the 25 Degree Celsius testing temperature...coupled with the fact that computers tend to run at 10 degrees higher than room temperature... In the summer time when the room temperature can easily reach 80 degrees F... your computer will be running at 33 Degrees C. or 90 Degrees F. So the...math can make...your 500 watt power supply into a 460 watt unit. In addition to this...what needs to be taken into account is that each degree that your computer components are operating at...under powered...adds more heat to the equation. Consider also...the possibility...that ratings given by the manufacturer of single components...such as graphics cards...need to be treated with skepticism... Manufacturers may minimize support issues and under rate the power required...in order to make a larger profit. Power supplies convert voltages from wall outlets to lower levels used by the PC... During this conversion, some power is lost as heat... The poorer the quality of the PSU The higher the voltage that is required to produce the preferred results. Resulting in more heat that the PSU has to deal with Therefore heat is the computers enemy...The hotter the temperature your PSU is forced to run at...the poorer the supply of power the rest of the components will receive...which has been known to lead to such things as crashes, freezing, rebooting, BSOD’s, and video distortion, as well as partial and complete failure of other components. The fact is very few PSU’s are capable of producing the wattage that the companies advertise. Quality units...are tested at very high temperatures...The efficiency rating of the PSU determines how much extra power must be put into the power supply to run the PC. A high quality PSU can help reduce the noise and heat generated within a computer system. The higher the efficiency rating the less heat the PSU has to deal with...Also the higher the quality of the PSU the higher the temperature that it can...safely... run your computer at...which reduces the need to run your computer at such low temperatures...that are hard to achieve. A quality PSU of the right wattage...for your computer...can easily give you two or more more years of service A quality PSU of wattage... higher than required...for your computer...can give you room for future expansion... For a very good comprehension of recommended brand names, wattage, and models in listed categories...Plus much more...check out this link. Power Supply Information and Selection - Tech Support Forum
Meh, think what you want mate, i don't really care. Also that is not my opinion, it is how it works mate.
Net Jockey is correct on the quality PSU's. This is a fact, but many websites do not properly review power supplies, as explained here. Additionally, that same site has an article on the computer PSU Judging a PSU by fan size is downright silly. Crappy PSU's have 120mm, yet PC Power & Cooling has excellent units using 80mm. That makes about as much sense as judging the reliability of a car base on wheel size. Granted, as already explained, heat is a big deal, so fan size can affect performance, but it's by far not the only thing. If the platform sucks, the fan size is nothing. Additionally, 25*C is an unrealistic operating temperature for the PC. 35*C-40*C is much better as that's a realistic scenario as that is a more common temperature for a PC to have inside. A bad PSU is bad news. Brands like Apevia have taken a PSU platform that may be good for 400W and sell it as a 500W PSU, as long as you operate it at a 25*C temperature. Additionally, the platform they tend to pick is some cut-rate pile of junk with low-grade parts and you end up with a junker that probably can't handle it's salt as is, let alone the over-rating it gets. Sure, it can do 500W, but how long until it blows up?
