Final Words

Effective CPU cooling is really very simple and should accomplish the following:
  • Lowering the processor temperature compared to the retail HSF. If an after market cooling solution does not perform better than the kit heatsink, there is no real reason to buy it.
  • Higher overclocking compared to the retail HSF. A cooler CPU could result in a longer CPU life, but most users upgrade cooling to overclock even further than is possible with a stock HSF.
  • Lower noise than Stock Cooling. For some this is an optional requirement, while for others it is extremely important. Effective cooling and noise reduction are often at odds in effective cooling, but some coolers manage this task better than others.
The Scythe Katana and the Thermalright MST-9775 add another variable and that is value. They both sell for around $25 and were designed to bring excellent performance for what they cost. In addition, they are both very light and can be used in situations like LAN Party PCs, where a large, heavy heatsink like the Tuniq Tower 120 or the Scythe Infinity might be just too heavy for a PC on the move. So given these goals how do these two coolers stack up?

The Thermalright MST-9775 is a good replacement for the Intel HSF for those looking for value, small cases, or traveling PCs. It cools better than the Intel retail HSF and allows overclocking about 50MHz further than the stock HSF. Installation on the Intel Socket 775 (Socket T) is very easy - as easy as the Intel retail unit. Noise is below the retail CPU at low auto speeds and a bit louder at higher fan speeds. The MST-9775 is small and should fit almost any motherboard and case combo. If you need something even smaller Thermalright has a low-profile OEM model. The MST-9775 also features a 4-pin fan connector that allows pin 4 to control fan speed.

The Thermalright disadvantages are that it will only fit Socket 775. Of course that is where today's best overclocking chips reside, so it is only a disadvantage if you are trying to OC and cool a processor that fits a different socket.

The Scythe Katana also cools better than the Intel retail HSF. In fact at most speeds it cools better than the Thermalright. This is mainly due to the fact that the Katana does not have a variable fan speed like the MST-9775 has. The Katana overclocks further than the retail HSF and slightly outperforms the OC of the Thermalright. The Katana is also a universal heatsink, and comes with the necessary hardware to fit any current socket except AM2. If you are cooling Socket A the Katana is probably the best cooler you can buy, as it is one of the very few to actually meet the Socket A weight limit of 300g.

The universal fit of Katana is also its downfall. Installation on Socket 775 is absolutely horrible, requiring more time and patience than most people possess. However, if you hang in there and attach Katana while the motherboard is out of the case you will be rewarded with very good performance on Core 2 Duo. Katana also does not have a fan controller, which means it is a bit noisier than the Intel retail HSF. You can add a fan controller and correct this or opt for the more expensive Katana CU which includes a fan controller.

Both the Thermalright MST-9775 and the Scythe Katana are good values at a cost of around $25. They perform better than the Intel retail HSF, though not by a huge margin. However, neither of these bargain towers challenges the top tower heatsinks like the Tuniq Tower 120 in cooling and overclocking efficiency. The MST-9775 and Katana may do all you want to do and they are both worth the money. For those buyers you have found a solution. If you move your PC a lot you should also consider one of these lightweight towers. But those looking for the best air cooling available and the best overclocking of their processor will be better served with a top of the line tower cooler like the Tuniq Tower 120.

Noise
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  • takumsawsherman - Wednesday, January 24, 2007 - link

    Why is the Tuniq tower 120 being compared against much cheaper coolers with smaller fans? Why not pit it against the Thermalright HR-01, which would be more of an apples to apples comparison?

    I am sure that Scythe must have a more worthy competitor as well, though I am not familiar with their line.
  • LoneWolf15 - Thursday, January 25, 2007 - link

    quote:

    I am sure that Scythe must have a more worthy competitor as well, though I am not familiar with their line.


    Scythe's Infinity is probably the closest competitor. I believe there may be a few other sites that have reviewed it.
  • Wesley Fink - Wednesday, January 24, 2007 - link

    You neglected to mention that we also compared the performance of the Scythe Katana and Thermalright MST-9775 to the Intel Retail HSF that comes with the Core 2 Duo processor. Until we test a cooler that might perform better than the Tuniq the range of performance is "real-world" between the Intel Retail HSF and the Tuniq. We believe most readers want to know how a tested cooler compares in this rnage - so they can decide if the features or cost are worth the performance drop from the best we have tested.

    In the future we will be testing some new tower coolers that should challenge the Tuniq. We also plan a value cooler roundup of coolers under $30.

  • Zoomer - Wednesday, January 24, 2007 - link

    Seconded!

    I'm looking forward to seeing the Arctic Cooler 7 Pro review. In cooler climates with a core2 duo, there is really no need to spend the extra $30 for a huge tower heatsink.
  • Calin - Wednesday, January 24, 2007 - link

    The comparison was between the baseline (the included cooler) and the best air cooler there is (at least known/proven until now).
    Should the Tuniq Tower be compared to the best air cooled equipments out there? Yes, and it would be nice to compare it to a not very expensive water cooled system too.
  • Jodiuh - Wednesday, January 24, 2007 - link

    Well if that's not reason enough to get a Tuniq.
  • LoneWolf15 - Wednesday, January 24, 2007 - link

    Getting one dropped my temps from my old Swiftech by 5-8C when idle and 8-15C under load.
    It sure was a good enough reason for me. And that's with the fan at a quiet 1400rpm.

    And I agree (with what I think you're saying) that, if you're going to spend $30 for an aftermarket cooler, and the Tuniq will fit, why not spend an extra 20-25 for best aftermarket cooler you can get?
  • Avalon - Tuesday, January 23, 2007 - link

    I think it's a good addition to AT to include cooling reviews. However, you guys should see if you can expand temperature gauging a little more to also include PWM temps and other important temperatures, as some HSF solutions have a large affect on these, while others don't.

    Also, really want to see the Coolermaster Hyper TX in the next roundup!
  • Vidmar - Tuesday, January 23, 2007 - link

    What was the orientation of the CPU/heatsink during the tests? Was the case (and MB) in a horizontal or vertical orientation? Since these new coolers use heatpipes and since the heatpipe technology relies on a liquid that turns to gas when heated then back to liquid when cool, the orientation of the heatsink/heatpipe plays a huge role in how the well it will perform.

    I would like to think that you are running these tests with the case in a vertical orientation like what a large portion of your readers would be using. But since you never say we don’t know. If these tests are being conducted with the case in a horizontal orientation (laying flat on a table), I would expect that the results would be different than what people would get at home (mostly vertical).

    Thanks!
  • Wesley Fink - Tuesday, January 23, 2007 - link

    Noise measurements were run with the case horizontal and an open side. Cooling tests were run with the case in the standard upright position, as our readers will most likely use them at home.

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