XSPC Raystorm X2O 750 RS240 Extreme Universal CPU Water Cooling Kit

Posted: February 16, 2013 in Blocks, Fans, Kits, Pumps, Radiators
Tags: , , , , , ,

THERMAL TESTING (Phase 1 Kit Only)

My intent in Phase 1 testing is to test as closely to real world as possible including a case condition. Through trials testing I’ve established that I will be using the NZXT Switch 810 bottom mount location. The case fans are all left at full speed throughout the testing. The XSPC fans and pump do not have PWM capability so the only means to control speed is through a manual fan controller. The pump also does not have any sort of RPM sensing however it is subjectively very quiet and I doubt too many people will be urged to speed down the pump much. So with that I will focus on reducing the fan speeds using my Crystalfontz fan controller for the slow speed to at least bring RPMs down in the 1300RPM area. Using the Crystalfontz CFA-633 I am able to control the XSPC fans down to about 475RPM @ 0%, 1055RPM @ 50%, 1355RPM @ 75%, and about 1680RPM @ 100%. The control is capable in 1% increments as well, so a fairly precise speed control which works well to maintain a fairly steady speed.


  • NZXT Switch 810 Full Tower Case, Bottom Mount, Dust Filters Removed (Bottom and Front).
  • Case top grill open, Case doors on and close, Case front panel on (filters removed) – Closed Case Testing
  • NZXT 140mm 1300RPM case fans, 2 intake front, one recirc, one exhaust back, one exhaust top.
  • Corsair TX650 Power Supply
  • EVGA 570GTX Air Cooled
  • ASrock X79 Extreme 7
  • i7-3930K processor, overclocked to 4.5Ghz at 1.344-1.352Vcore, Per CoreTemp this is putting out roughtly 170-182W so it’s very aggressive and about double that of many processors.
  • Prime 95, Custom Small 8K FTT is started to load 12 worker threads at 100%.
  • Thermal Sensor logging: Crystalfontz CFA-633, logs up to 32 temperature probes and up to 4 fan channels: http://www.crystalfontz.com/products/633/index.html
  • 2 Air “Ambient” thermal sensors, 1 Air “Out” sensor. 6 core sensors
  • Minimum 20min warm up time, likely a 1 hour log minimum. Review and trim stable data.
  • Phase 1 testing will be kit only parts, Kit Fans, Kit TIM, Kit everything, no mods.
  • Kit TIM using the large “+” method.
  • For Kits without fan speed control, I am using my Crystalfontz CFA-633 to adjust fan speed and log fan RPM.  This allows precise 1% speed control and the desirable logging capability.

100% Pump, 100% XSPC Fans In Push UP (1680RPM) FULL SPEED

First I ran a full speed all test. While this doesn’t get up as high as most kits (Which typically run up to 1800-2700), it does show you the max performance out of the kit and what you could get simply plugging the kit fans into the motherboard.


100% Pump, 68% XSPC Fans In Push UP (1310RPM) SLOW SPEED

To test a slower speed test, I dialed the fan speeds down using the Crystalfontz to approximately 1310RPM and achieved the following result.


So a little over 2.5C rise slowing the fan speeds down just 350RPM.

Kit Phase 1 Comparison Data

While I only have one kit to compare at this point and they do use different fans with different maximums, it’s still a good Max comparison and Slow 1300 comparison.


The Swiftech H220 has a slight advantage in the Full Speed 100% test which is likely due to the extra 120 RPM or so of the Helix fans. However under the Slow Speed 1300 RPM test, the results flop where the XSPC kit has a slight advantage.  More importantly you should understand that RPM is generally not a very good comparison with differing fans and that point is made fairly well in the subsequent page where I worked to convert the result into a dbA or noise level vs.core temperature look.


Pages: 1 2 3 4 5 6 7 8 9

  1. Cookiejar says:

    Hi Martin,

    In your RS360 review, the out/in air delta was about 8.8 degrees for 1400rpm fans at about 200w of heat. In this review, given the smaller RS 240 but similar fan speeds and heat loads, I was expecting to see out/in air deltas of maybe 13 degrees? Otherwise, the air wouldn’t be able to carry away the same amount of thermal energy.

    However from your tests, the RS240 seems to be able to dissipate the heat of your overclocked 3930K with only an out/in delta of 3 degrees. This befuddles me, and I can’t understand how the system achieves thermal equilibrium. How is all the rest of the heat lost?

    What are your thoughts on this? Could there be some difference in your air temp measurements as compared to the measurements done in your radiator tester. Maybe the rest of the case air is mixing with the air out?

    Thanks and your site is a great read = ).

    • Martinm210 says:

      Disregard the air out in these kits. It is located such that it gets cold intake air from the front case fan and really not useful or accurate. The air out in my rad bench is controlled and accurate but it is very hard to measure air out without some sort of rad test bench.

      That’s the downside of case testing. It better represents thermals and noise but harder to measure something like air out when you have air coming in all over the place. In the kit testing air in and core temps are really the only thing I can control very well.

  2. Steve Vang says:

    So this kit has everything needed to water cool? No need to buy tubes and screws?

  3. kopi luwak says:

    Hi! I realize this is kind of off-topic however I needed to ask.
    Does running a well-established blog like yours require a lot of work?

    I am brand new to running a blog however I do write in my diary every day.

    I’d like to start a blog so I can share my experience and thoughts online.
    Please let me know if you have any kind of ideas or tips
    for brand new aspiring blog owners. Thankyou!

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s