Thermaltake Volcano 7+

A top performing, PIV/Socket A heatsink with adjustable fan speeds — Joe

SUMMARY: Top rank performance for both PIV and Socket A use.

Vol 7

Size: 73 x 75 x 70mm high; Fan: 70 mm 49cfm @ 6000 rpm; Variable fan speeds: 6000, 4800 and 3000 rpm; Weight: 680 gms

Thermaltake was nice enough to send us a sample of their latest heatsink, the Volcano 7+. This is a very interesting product – it comes with hardware so that you can adapt it for either Socket A or PIV use – sort of a “DIY” heatsink.

For PIV use, the Volcano 7+


gives you all the hardware necessary. It ships unassembled, so you will be required to screw things together per your needs.

PIV Mount

The PIV mount.

All you need is a phillips head screwdriver – this is not difficult. The instructions are clear enough and there are enough diagrams to walk you through it.


Stripped of its fan shroud, the heart of the Volcano 7+ is 460 grams (about one pound) of copper. This is a 36 fin skived heatsink – a LOT of surface area. For socket A use, some users might balk at hanging this much weight on a single lug; adding in the weight of the fan and its shroud gets you up to 680 grams – about 1½ pounds.

At this weight on a single lug, it won’t take much to shear a lug. This heatsink is NOT suitable if you transport your PC, so Socket A users be warned. I would feel a LOT better if the clip engaged all three lugs, and frankly I’m surprised that Thermaltake opted for a single lug clip (note: If you have a two or three prong clip from another heatsink, it would not hurt to try it out on the Volcano 7+). It also requires a screwdriver to mount on the lug.

The base is 6mm thick


and well finished. The polishing marks you see are not discernible to the touch. I’m going to send it to Hoot for his take on it – he’s a great “base player”.

The Volcano 7+ features a neat little switch that allows users to click in three fan speeds: High @ 6800, Median @ 4800 and Low @ 3000 rpm. A closer look at what’s inside


reveals a bunch of resistors hooked up to each setting. By varying resistance, voltage is dropped to achieve two lower fan speeds. The controller will get warm, not hot, to the touch, especially at the lower setting.

In addition, users should think about how they are going to hook this up. The controller hooks into a four pin power plug, with a separate three pin plug to read out fan speeds in BIOS. If you want to access the switch, you’re will most likely have to run extra wires to lengthen it enough so that you can access the switch outside the case.

The fan carries a Thermaltake label, Model #FD1270259B-2F – a 70 x 25mm unit rated at 49 cfm @ 6000 rpm. The fan controller has three settings – “High-speed, Low and Median”. At low, it was very quiet – the Radio Shack sound meter, placed 8″ from the fan’s intake, did not register a reading, so it was less than 60 dBA. The Median setting registered 64 dBA and 71 dBA at high – a little louder than a Delta 38 (about 69 dBA).

In summary, this is a hefty chunk of copper with a variable fan switch and adaptable to PIV or Socket A use – a nice package.


The Volcano 7+ was first tested on the CPU Die Simulator at three different fan speeds. I then tested it on an Shuttle AK31 (modified to read AMD’s on-die diode) for Socket A performance at three different fan speeds.

Last, I tested the Volcano 7+ on a Lucky Star PIV motherboard for PIV performance. I have modified a PIV to take direct temperature readings of the CPU case, following Intel’s spec. Also recorded are CPU on-die temps.



Die Temp

Ambient Temp



Volcano 7+, 6000 rpm, 77.6w

42.5 C

19.0 C

23.5 C


Volcano 7+, 4800 rpm, 77.6w

44.5 C

19.5 C

25.0 C


Volcano 7+, 3000 rpm, 77.6w

46.7 C

18.8 C

27.9 C


TEST RESULTS – Motherboard

CPU Die Temp

Ambient Temp




XP @ 1467, Shuttle AK31, fan HI

35.9 C

19.1 C



28 C

XP @ 1467, Shuttle AK31, fan MED

37.0 C

19.3 C



30 C

XP @ 1467, Shuttle AK31, fan LO

43.7 C

21.2 C



34 C

PIV 1500, Lucky Star, Fan HI

31.2 C²

19.5 C



27 C

PIV 1500, Lucky Star, Fan MED

32.0 C²

19.2 C



27 C

PIV 1500, Lucky Star, Fan LO

34.0 C²

18.7 C



30 C

¹MBM Temps: In-socket thermistor for AK31, on-die diode for PIV

²Temperature of CPU Case

Delta = CPU temp – Ambient Temp
C/W = Delta / CPU Watts

Interpreting C/W: For every watt the CPU radiates, the heatsink will cool the core by the (C/W x watts) plus ambient temp. For example, at an ambient temp of 25 C, a C/W of 0.25 with a CPU radiating 50 watts means that the CPU core temp will be 50 x 0.25 = 12.5 C over ambient temp, or 37.5 C. The lower the C/W, the better.

Die Simulator results place the Volcano 7+ in the top rank of heatsinks (Heatsink Ranking) at the HI fan setting. At the MED setting, performance is still quite good; at LO, it’s down in the lower ranks, as you might expect. My XP did not like this setting at all, Prime 95 was not stable under stress.


Top Rank performance at the highest fan speed and users can moderate noise (and performance) with three switch settings. However, Socket A mounting might be an issue, and I would advise some caution with single lug mounting.

All told, an impressive package for both Socket A (with caution) and PIV use.

Thanks again to Thermaltake for sending this our way. I urge Thermaltake to rethink the single lug clip.

This is now available from Heatsink Factory.

Email Joe

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