How can I tell if this computer will be cool enough?

ASUS M4N68T-M V2 GeForce Socket AM3 DDR3 MB

Corsair XMS3 4GB PC10666 DDR3 1333MHz 4096MB

Seagate 1TB LP Serial ATA HD 5900/32MB/SATA-3G


Sapphire Radeon HD 5770 1GB PCIe DDR5 DVI / HDMI


AMD Phenom II X4 840 AM3 CPU

Antec EA650 650W Continuous Power ATX12V v2.2/EPS12V v2.91 Compatible with Core™ i7/i5 Power Supply

I've done a whole bunch of rechecking things and this is just one more I need to do. Is there anything I should add to keep the temperature down on this Computer that I'm building? It's going to be on for long hours at a time to play online games so I need to make sure that it can handle those long hours.

Besides that, what do you think of this build? Most of it was a Barebones kit that I substituted some better parts. It cost me around $520 but I still have to buy a monitor.
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More about computer cool enough
  1. Your concern about cooling is well founded. By most accounts, the case seems cheap, and looks like it will run hot. I can't tell if there are any fans that come with the case. Probably none since the description keeps referring to "fan support". I bought a $29 case at Micro Center yesterday and it had one fan, so I purchased a couple more. If you add a fan or two, you should be fine.

    Other than that, your power supply is way too big. Check this out: CORSAIR Builder Series CX430 CMPSU-430CX 430W for $13 after rebate. Normally, I would not recommend any PSU at this price, but Corsair is a good manufacturer, so you should be OK. You do not need more that 500 watts.

    Did you account for shipping in that $520? Tiger Direct does not give the same discounts that Newegg is prone to do. Also need to consider sales taxes, depending on where you live.
  2. $20 for a power supply that isn't a pile of $#&! is pretty good. But I would not ever use a Corsair CX430 for myself and would scarcely recommend one to someone else. If you are willing to spend $70 for a power supply I say that we can choose a unit that is better than the CX430, but still save some money, which can be put into other areas of the build.

    This wipes the floor with the Corsair CX430 in everything except cable lengths, price but lacks a power cord:
    Antec Earthwatts Green EA-380D 80Plus Bronze $40
    It has the same 12V amperage, it is more efficient and it has a higher temperature rating.
  3. What do you mean by it's too big? Just that it's too much power or is it physically too large to fit?
  4. Too big meaning excess capacity. All the standard power supplies will fit into mid tower cases pretty much these days. The screw holes all line up appropriately, and the opening for the exhaust is standard. They differ in length sometimes, but generally fit without issue.

    Are you ready to purchase? Here is the query that I use to select power supplies: Newegg PSU search. Your CPU is only 95W and the video card does not take more than 150 or so: a 400 watt to 500 watt power supply is all you need.
  5. A 5770 will struggle to draw much more than 110watts.
  6. Silvune is right - a 300 to 400 watt power supply is ample for your machine. Do not spend more money than you need to, especially since you are on a tight budget.

    Check out this case, on sale through tomorrow: Rosewill R101-P-BK 120mm Fan for $29 It is a small case, but it will fit your mATX board. Better still, it has a fan, and received 5 eggs from Newegg, with free shipping through 4/6.

    Have you found a monitor? Here are a couple to select from: Newegg Monitors, free shipping. The second one costs $130 because not only is it larger, the resolution is 1920 X 1080.
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