The K701 fits all Athlon motherboards, and does not block any DIMM slots. It comes with a preinstalled thermal pad - for better performance, remove the pad and apply thermal compound. All tests were also run using thermal compound. To be honest, it was a bit unfair to include the K701 in this comparison, since it only has one small fan.

Here are two close-ups - one of the "bonded fins", one of the clip:

    

The RDJD K701 is also sold under the name "3DfxCOOL K7HO"

The fan

The K701 comes with a fan in a rather unusual format: 52x52x15mm. The fan is manufactured by JMC, so both heatsink and fan come from the same company, which is also unusual; most heatsink manufacturers buy their fans from third-part vendors. The fan spins at around 6000rpm, but the noise level is not very high.
 

Installation

 

The K701 comes with a unique mounting mechanism: It uses a clip, like most other heatsinks, but the clip can be tightened using a screw. That means that installation isn't tool-free, but the solution is still very convenient and allows secure mounting.
 

Conclusion

 

Considering that only one small fan is used, the performance of this heatsink is remarkable. This certainly isn't the heatsink hardcore overclockers will chose, but for those who aren't overclocking but want good cooling without excessive noise, the RDJD K701 is a good choice. This heatsink clearly shows that there's a high potential in the "bonded fin" technology. I'm waiting for the day RDJD decides to make huge Alpha-style heatsinks with two 60mm fans using this technology... Currently, RDJD offers two dual fan Athlon heatsinks, but heatsinks are not larger than the K701's, and the dual fan units do not fit the ASUS K7M.

RDJD K701 at a glance

Fan: One 52x15mm JMC Fan rpm (measured): 5921 Weight: 250g (!)

Advantages

Compact and light Not very loud Remarkable performance, considering size, weight, and the fact that only one small fan is involved. Fits all motherboards, does not block any DIMM slots Inexpensive

Disadvantages

Not as efficient as the larger dual fan units in this comparison.