Customer Review

400 of 416 people found the following review helpful
5.0 out of 5 stars Rock Solid Power Supply, July 5, 2009
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This review is from: Corsair CMPSU-650TX 650-Watt TX Series 80 Plus Certified Power Supply (Personal Computers)
This is a great, rock solid power supply. This PSU is capable of handling almost anything that you can throw at it, except for some extremely exotic setups.

Most computers only consume around 100-150w, and even a high end computer might consume maybe 200w. That's why most OEM computer manufacturers put small 250-350w PSUs in their systems. If you look at online reviews of highly overclocked systems with multiple video cards (SLI/Crossfire) they consume at most about 500-600w. Anandtech (a very trusted hardware review site) in a comparison of the ATI Radeon HD 4890 and NVIDIA GeForce GTX 275 (google it) also did a roundup of other comparable video cards and some SLI/crossfire setups. Their review system was a Core i7 965 @ 3.2Ghz (non-overclocked), 6GB of RAM, and SSD drive, and X58 based motherboard. Idle power consumption ranged from 170-260w, and full load from 260-420w.

The point is you don't need a 1000w PSU even if you have a high-end system. The wattage race is long over. A good PSU from a good PSU manufacturer is all you need. For regular desktop systems, a good choice is Corsair's 400CX or Antec's EA380. If you need a bit more power for an overclocked system, or multiple video cards this PSU is a great choice. Also for consideration in this price/quality range are Antec's EA650, SeaSonic's S12 and M12 550w & 650w versions, and PC Power & Cooling's 650 & 750w versions along with Corasir's own 750w version of this same power supply.

This power supply is also 80 PLUS certified, which means that it maintains at least 80% efficiency across a range of power usage from 20% of it's capacity (~130w) all the way up to it's rated maximum. This is *very* good. Most off-brand PSUs only make about 70-75% efficiency. This doesn't just make a difference in your electric bill (not much, but every bit helps), but it also means the PSU runs cooler since less energy loss during conversion from AC to DC. Generally speaking the 80 PLUS certified PSUs use better quality components to achieve the higher efficiency which means they are less prone to failure than the other cheaper brands.

In addition to having quality components, it also looks very good in the case. A very dark grey matte finish accented by yellow and black markings. The cables are long enough to reach pretty much anywhere. This is in my Antec 1200 full-tower case, which has the PSU at the bottom. The 8-pin motherboard power connector has plenty of room to reach the top of the motherboard. However, I had to run the cable the "normal" way over the video card and past the CPU fan since it was not long enough to feed behind the motherboard tray as I was hoping. Then there are 2 cables with 4 SATA power plugs on each, 2 cables with 6-pin PCI-e video card cables (each having an optional 2-pin attached for those video cards that require 8-pin power), and 2 cables with 4 regular molex plugs each.
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Tracked by 4 customers

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Showing 1-10 of 30 posts in this discussion
Initial post: Feb 5, 2010 10:42:08 PM PST
GailH says:
Can it work with 220V AC input power, (instead of 120V AC)?

In reply to an earlier post on Feb 6, 2010 4:33:19 AM PST
Harvey Ramos says:
Hi GailH, I just posted a pair of pics for this product. The specs sticker on the PSU say it does 100-240v. There is no switch on the outside of the PSU, so I assume that it internally switches voltage. You may want to check with Corsair just to be 100% sure.

Posted on Apr 16, 2010 11:13:13 PM PDT
You seem to know a great deal about the amount of power usage computers really run on, so I have a question that I really hope you can help me with. My computer has a 300w power supply and I've been wanting to upgrade the graphics card in order to play the sims 2 with all of the settings on high, I can't afford to spend too much so I was wanting to buy a card that can run on the power supply I have instead of getting one of these Corasir supplies. I did decide to get the 650w if the supply on my computer can't work with the cards. These cards are all supposed to run on a 300w power supply: PNY GeForce GT 240 51 2MB GDDR5 PCI-Express 2.0 DVI with HDMI and VGA Graphics Card VCGGT2405G5XEB
EVGA 0GeForce GT 240 PCI-Express 2.0 Graphics Card 1G-P3-1236-LR
EVGA GeForce GT 220 1024 MB DDR3 PCI-Express Graphics Card 01G-P3-1226-LR
EVGA GeForce GT 220 Superclocked 1024 MB DDR3 PCI-Express Graphics Card 01G-P3-1227-LR
PNY GeForce GT 220 1024 MB PCI-Express 2.0 DVI with HDMI and VGA Graphics Card VCGGT2201XEB
But I don't want to chance it, do you know if they would be okay with the power supply that already is in my computer? Thank you.

In reply to an earlier post on Apr 17, 2010 5:32:05 AM PDT
Harvey Ramos says:
Hi Carla, First I wouldn't bother with the Geforce 220. They are almost the same price as the 240 and perform significantly worse. If you get a GT240 make sure it has GDDR5 and not GDDR3 (i.e. the first one you listed has GDDR5).

I can't 100% guarantee that your current PSU will be OK, but I think it should be. Basically you want to look for any card that does NOT need a PCI-E power connector. That will limit the card to a max of approx 70w (that's how much power can be pulled from the card slot). Most of these cards will idle at less than 20w (source xbit labs).

The next question is whether that will run the game with all the settings on high. I suspect it will, but i don't have any experience with that game in particular. What size screen you're running has a big influence as well. A lower resolution screen like 1024x768 doesn't require much to run, but a 1920x1080 screen needs a lot of horsepower and you'd need a much stronger card (and PSU) to do that.

If you do need a new PSU, I'd look at the other models I mentioned in the 400-500w range. They come with PCI-E power connectors (double check of course) which will let you install a much more powerfull video card.

In reply to an earlier post on Oct 26, 2011 10:23:56 PM PDT
The PSU I'm trying to replace does not have a power switch. Does it matter?

In reply to an earlier post on Oct 27, 2011 6:43:25 AM PDT
Harvey Ramos says:
Hi Xavier, no it should not matter that your old PSU doesn't have a switch.

Posted on Dec 16, 2011 10:14:37 PM PST
Jay in Maine says:
Thank you Harvey for the knowledgeable review. From one geek to another, it's appreciated!

Posted on Mar 14, 2012 11:48:46 PM PDT
Vinny I says:
Odd how you say even "high end" systems won't consume more than 420W. I'm running 4X GTX480's in SLI, an i7 2700k, H100, 1 HDD and 1 SSD and full water cooling + fans and I max out at 1392W combined. I use 2X 1000 PSU's - 1 for the system and 1 for the graphics card.

In reply to an earlier post on Mar 15, 2012 5:56:04 AM PDT
Harvey Ramos says:
If you're running FOUR high-end graphics cards (each costing over $200 retail, plus a motherboard to handle all four) that are notorious for high power consumption and heat, plus water cooling pumps (not counting the H100 in that) then I'm pretty sure you know you need more than 650w. You also know that isn't a high-end system for normal people, that's an extreme gaming system.

I'm currently running an i7 2600k on an H100 as well (although with air cooling everywhere else), 16gb of RAM, 2 SSD, 2 HDD, and a single ATI 6850. A high-end machine by most people's standards and it pulls under 150w at idle and around 300w under load. Well within the range of a PSU like this one.

Posted on Apr 18, 2012 12:01:58 AM PDT
Peter Craine says:
Thanks for the review, and the information.

I'm confused about the PSU's size, however. Amazon's specs say it's 11.6 x 5.3 x 8.5 inches. Can that be right? NewEgg and Frys both say the TX750M is 5.9"(W) x 3.4"(H) x 6.3"(L), and Corsair's website shows 150mm(W) x 86mm(H) x 160mm(L), which seems to match NewEgg and Frys.

Could that be the package dimensions Amazon is giving instead of the product size? I know the monster PSU Amazon describes is not going to fit in my micro ATX case.
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