Categories: Power supply units

Thermaltake Smart M650w



The Power supply is a component that has become increasingly important in recent years as the wattage requirements for parts ramp up and customers become more aware of their system’s impact on the environment – and their wallet.

Because of this many companies have begun producing PSUs, leading to a pretty convuluted marketplace, making it hard to decide which one to go for. While XSR doesn’t have the budget for a full power supply test run, we can do a couple of quick checks which will let you know whether you can put a unit on your maybe list, or strike it off altogether.

Today I’m looking at the Thermaltake Smart M650w unit. Let’s see where it belongs.


  • Support the latest ATX 12V V2.3 & EPS 12V standards.
  • Guaranteed to deliver 650W continuous output @ 40℃ operating environment.
  • High current & single +12V rail provides superior performance.
  • 80 PLUS® Bronze certified: with 82-88% efficiency @ 20-100% load under real world load conditions.
  • High quality Japanese main capacitor ensure superb performance and reliability.
  • Ultra-quiet 140mm cooling fan delivers excellent airflow at an exceptionally low noise level.
  • Active PFC with Universal AC input.
  • Flat, low-profile modular cables allow for easy cable routing and increased airflow.
  • Supports multiple core high-end graphic cards & CPU. (NVIDIA SLI & ATI CrossFire Ready)
  • Dimension: 150mm(W)x86mm(H)x160mm(D).
  • High reliability: MTBF>100,000 hours.
  • Heavy-duty protection circuitry  of Over Current, Over Voltage, Under Voltage, Over Power and Short-Circuit protections.
  • Safety / EMI Approvals: UL/CUL/TUV/CE/FCC and BSMI certification.


P/N SP-650M
Model SP-650AH3CCB
Type Intel ATX 12V 2.3
Max. Output Capacity 650W
Peak Output Capacity 715W
Color Black
Dimension (H x W x D) 86mm x 150mm x 160mm
PFC (Power Factor Correction) Active PFC
Power Good Signal 100-500 msec
Hold Up Time 16msec (minimum) @ 80% of full load at 115Vac/ 230Vac input.
Input current 10A
Input Frequency Range 47 Hz – 63 Hz
Input Voltage 100 Vac- 240 Vac
Operating Temperature 0℃ to +50℃
Operating Humidity 20% to 90%,non-condensing
Storage Temperature -20 ℃ to +70 ℃
Storage Humidity 5% to 95%, non-condensing
Cooling System 140mm Fan: 1800 R.P.M. ± 10%
Efficiency 82-88% efficiency @ 20-100% load
MTBF 100,000 hrs minimum
Safety Approval UL/CUL/TUV/CE/FCC and BSMI
PCI-E Connector PCI-E 8pin x 2, PCI-E 6+2pin x 2


Fancy packaging for a fancy looking product. This is an 80 PLUS gold efficiency PSU, also featuring modular cabling and SLI compliancy.

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The extra modular cables are bundled in this little pouch that gives you a convenient place to store the unecessary ones. There’s also a couple of warranty and setup manuals.

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Extra cables for this unit include two with extra SATA, one for four pin molex, and one PCIexpress cable, featuring two extra headers.

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 The PSU

The unit itself is relatively bland in design, with a matt grey finish. The labels/stickers on the sides look quite fancy though.

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Specifications are listed on the top with the side labels taking up the majority of the room.

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The rear grill uses a honeycomb design, allowing it to filter the maximum ammount of air through without compromising its protective shell.

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This being a modular PSU, there are extra ports to plug in the optional cables. There’s a small diagram letting you know what’s what, but the colour coding makes things pretty obvious. Interestingly, the PSU cables are routed through the far side of the unit, so when mounted, the cables are closer to the motherboard and any management clips/holes you choose to employ. This is a very minor adjustment, but a ‘smart’ one nonetheless.

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As expected, opening this PSU up voids the warranty and destroys the relevant sticker. But did there need to be screws under each of the side labels? Not only did I spend a while looking for them, but when I discovered their location, I had to wreck the fancy looking stickers.

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The interior is well enough put together, with a decent sized, single Japanese capacitor.

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Big thank you to CryoPC for providing the following test rig:

CPU: Core i5 750 @ 4GHZ
Motherboard: Asus P7P55D-E
GPU: Sapphire 5850 1GB
RAM: Corsair Dominator 4GB PC3-12800 DDR3
Storage: Samsung F3 500GB 16MB


Here at XSReviews, we don’t have the money for a full test bench when it comes to PSUs. Load testers cost thousands of pounds which unfortunately we just don’t have. Because of this, we don’t pretend to test the rail stability or efficiency of a PSU, as we simply can’t do it effectively.

However, what we can do is test the Ripple/Noise quality of each rail using an oscilloscope. The one used was USB Instruments Stingray DS1M12 using HP 3060 probes and also in line with ATX specifications, I used 10uF and 0.1uF capacitors to simulate added load.


Noise / Ripple Results

For a rundown of what noise/ripple is and why it’s important to test it, check out my last PSU review here.

The figure to note in the following images is the peak-peak voltage, the second reading.


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Each tested rail is well within the safe range. However, the 3v and 5v rails do come a little close to the maximum. There are better PSUs out there in terms of noise/ripple, though this one shouldn’t cause any problems.


While far from a full test suite, we can at least confirm today that this PSU is more than safe for use. For a test of this unit’s efficiency capabilities, we’d recommend checking out a review from one of the bigger sites.

It’s a good looking PSU – though if you open it you’ll have to wreck the fancy stickers – and it’s incredibly quiet. Despite ramping the rig up with GPU and CPU load software, I didn’t hear a peep out of the PSU or its whirring fan.

At £90-£100, this isn’t the cheapt PSU around, but it’s far from extortionate.


  • Passes noise/ripple test
  • Looks good
  • Quiet
  • Nice braided cables
  • Cables are on opposite side for easier management


  • Stickers are wrecked during opening
  • Not the greatest noise/ripple results
  • Bundle is a bit lacklustre
Whoopty :

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