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Is a 750w psu enough for me?

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February 22, 2010 5:25:00 PM

I am building a new computer, and i am in doubt about weither a Corsair TX CMPSU-750TXEU will be able to run my system.

The specs are:
Cpu = Intel i7 920
Gpu = GeForce GTX 295 SLI x2
Motherboard = ASUS P6T X-58 S-1366 am = 12GB DDR3 1600MHz KIngston HyperX (6x2gb)
Harddisk = 1TB Samsung 7200rpm 32MB SATA2
CPU Cooler = Arctic Cooling Freezer 7 Pro S-775
Case = Antec Nine Hundred Two.

I have been looking at a cheaper and more powerfull psu, the Energon 1000w EPS-1000. But, im afraid that it will burn my rig or something like that.

What should i choose?

Thanks in advance

More about : 750w psu

February 22, 2010 5:29:54 PM

Go with at least an 850, the Corsair 850TX is a great choice. But in your case, even going with 1000W wouldn't really be overkill.
February 22, 2010 5:30:04 PM

Btw. I am going to OC it.
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February 22, 2010 5:34:33 PM

I figured you would, and assumed you would have an optical and maybe add another HDD later, and I recommend at least an 850, and make sure you go with a good tier brand like Corsair.
February 22, 2010 5:36:58 PM

Doesn't matter. 1000W is overkill for three dual GPU cards or 4 single GPU cards even if you overclock everything and add in some more devices.

Besides, Energon is not a good choice for a PSU. Stick to Corsair, Antec, SeaSonic or Silverstone. I believe the Silverstone 850W is currently about the same price as the Corsair 850TX and more efficient.
February 22, 2010 5:37:34 PM

2 GTX295s? Thats just a poor investment right now. A 5970 will cost you less and perform better as quad SLI does not scale well, it will also use about half the power and leave you with upgrade options in the future.

Each GTX295 has a TDP of 289, so thats 578 for the pair, plus 130 for the i7 at stock clocks, we are talking about 708W just from those 3 when run at full load. If you are going to get 2 GTX295's consider the 850HX or 950TX, they should provide you plenty of power and wont be run quite as close to max capacity as the 750TX would.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

But really i suggest a 5970 and the 750TX, that should be more than enough graphics power to last you for quite a while.

February 22, 2010 5:37:49 PM

Well, when selecting a power supply for that particular build, I would first and foremost make sure that it has the appropriate connectors for your video card, which the Corsair you've selected DOES.

A 750W should be enough to power the system you've selected, however you may want to consult a PSU calculation tool to be sure. This link points to the Homebuilt Systems forum Guide to Choosing Parts:
http://www.tomshardware.com/forum/257075-31-guide-choos...

Scroll down to the Power Supply section and there should be a PSU calculator linked there that will more accurately allow you to calculate your wattage needs.

As far as specific brands go, the Power Supply is one thing you DEFINATELY do not want to skimp on. If/when your PSU fails, it has the potential to take everything else in your system with it. Try to avoid the off-brands as much as a possible.

The Corsair that you've selected looks to be a high quality power supply, as is evident by the Active PFC, and it's 80+ certification. If 750 is in fact enough watts for your needs, this would be a good choice. If you find that you need more, I would see if Corsair has an 1000W PSU in the same line that you could get.
February 22, 2010 5:40:41 PM

hunter315 said:
But really i suggest a 5970 and the 750TX, that should be more than enough graphics power to last you for quite a while.


I also agree with hunter on the video cards. A 5970 is pretty much like having two SLI'd cards, yet it takes up less power, and only takes up on cards worth of space inside your case. A 5970 would be a much better choice for your needs that the two Nvidia cards in my opinion.
February 22, 2010 5:48:56 PM

Yeah i thought so.
I will possibly buy a 5970 instead.
February 22, 2010 6:12:55 PM

one thing i would add is that if you plan on overclocking your cpu you should swap out that freezer pro 7 for a hyper 212+ which has proven to be a much better performer, and is only $30!
February 22, 2010 7:20:42 PM

whatelsematters said:
one thing i would add is that if you plan on overclocking your cpu you should swap out that freezer pro 7 for a hyper 212+ which has proven to be a much better performer, and is only $30!

Thanks, i will look into it.
!