I've been in a satisfaction pendulum over the Rev. B Ninja ever since I got one last winter. Right now I'm at the "very dissatisfied" end of the spectrum (as opposed to the, "I guess this works OK" end) so I decided to condense my months of experience with Rev. A vs. B into an email to Scythe and see what they say.
Here's what I sent them:
I must very regretfully express my complete dissatisfaction with the revised version (SCNJ-1100P) of your excellent CPU heatsink, the Ninja.
In 2005 after reading Silent PC Review's article about the original SCNJ-1000 Ninja ( http://www.silentpcreview.com/article251-page1.html
) I decided to purchase one to improve the cooling of my Socket 939 Athlon 64 3500+ system. Its performance was exceptional and the product satisfied me in every way.
In 2006 I assembled a new PC using an Intel Core 2 Duo E6400 and Asus P5B Deluxe motherboard. I had unfortunately lost the LGA775 socket kit that came with my original Ninja (or perhaps the Ninja did not include an LGA775 mount; I don't remember) so I purchased the Scythe Universal Retention Kit from Newegg.com. Again, performance of the Ninja was fantastic and met the very high expectations I had after my year of using the Ninja with my old AMD system. My CPU's idle temperatures were around 36-38 degC and load temperatures rarely rose much over 45-46 degC.
Your Ninja had worked so well for me in two PCs that when my parents asked me to provide a new PC for them, I purchased a new Ninja to fit onto my old AMD system, which I was going to give them. At this time the SCNJ-1100P Ninja Plus Rev. B was the only Ninja available. When I went to mount it on my old AMD motherboard, an Abit KN8-SLI, I found that the orientation of the "long" and "short" heatpipes had been reversed, with the result that several capacitors near the 939 socket interfered with the "long" heatpipe side of the Ninja. A diagram of the problem is attached to this email.
Very disappointed that I could not employ the new Ninja in its intended system, I decided to "give up" my old Ninja and install it in the system I was assembling for my parents, which, as I already mentioned, used a motherboard on which the Ninja had already been proven to work. Obviously therefore I had then to install the new Rev B Ninja on my P5B-based Intel system, using the new 4-pushpin mounting system similar to the stock Intel solution, as opposed to the convenient and effective backplate plus mounting rails included in the Universal Retention Kit.
Upon succeeding in installing the Rev B Ninja, I immediately noticed that both idle and load CPU temperatures were higher than with the "old" Ninja, to the tune of 5-6 degC. In other words, the CPU that had previously been idling in a 75 degF room in a well-designed and -cooled Antec P180B case around 37 degC was now idling around 44-45 degC, and at load always broke the 50 degC barrier. This was performance functionally identical to the stock Intel cooler, whose primary advantage over the Rev. B Ninja was that it did NOT cost me $39.99.
I have since completely removed and remounted the Rev. B Ninja no less than five times. I have also changed the speed and position of the three 120mm fans in my case -- intake, exhaust, and on the Ninja -- and the Ninja's Rev B performance has not reliably improved. This situation has regrettably led me to remove the old, original Ninja from my parent's 939 system, reinstall the stock AMD cooler there, and replace the old Ninja in my Intel system. Now, I must search for an alternative cooling solution from one of your competitors, probably Thermalright's XP-90 which I positively know will fit on my Abit 939 motherboard, to employ in my parents' PC.
In summary, the Rev. B version of your originally wonderful Ninja has thoroughly disappointed me -- and numerous others on the internet, if you check the Silent PC Review forums: http://www.silentpcreview.com/forums/viewforum.php?f=8
http://www.silentpcreview.com/forums/vi ... hp?t=39352
The Rev B Ninja is now sitting in its box waiting to be listed on eBay or otherwise resold, so that I can try to get some of my money back while I search for an alternative. I would like to thank you for the outstanding experience I've had with the original Ninja, but encourage you to take my comments into account when considering a theoretical Rev. C version of your product. Thank you in advance for your consideration.
So I'm going to wait and see what they say, and figured I'd share the results here. I believe most observers would agree the Ninja Rev. B has NOT been the almost unqualified success the original was, especially with LGA775...