Well, I received my Thermalright SI-128 SE tonight and installed it.
First, let me tell you what a major pain in the ass it is to install in this board. Anyone who is thinking about it, just know that you are going to face some major issues. Pray to God that you have a little brother or a china man to get your fingers in there and plug in some of the power adapters.
Second, this is a very well made heatsink. I received it and it looked mint. It looks far better and far more carefully made than the Tuniq Tower. I decided to lap it right away because it was far from flat. I spent about 30 minutes and lapped her down to near flat. I don't think It is perfect, but pretty damn close.
Third, The Tuniq is a piece of shit to remove from LGA775. I almost destroyed my motherboard trying to get the back plate off. Seriously, that shit does not come. Some say that is a good design, I say, hell no. That is the worst thing you could do. The SOB was superglued to the back of the motherboard. I had to use a screw driver and very carefully poke holes into it until I could pry the damn thing off. Of course, your can't reuse it after that (which sucks). I will have to mod it if I am going to install it in another CPU now.
Now, the results you have all been waiting for, actually, maybe none of you waited or even cared for that matter, but here they are.
It dropped my temps a whopping 2 degrees from the Tuniq Tower on the CPU and didn't really do anything at all for the PWM. I was a bit taken back, I mean, who the hell? People mentioned that blowing air over the PWM would cool it down. Well, it didn't. You should feel the pressure my Silvertake 120mm fan is blowing towards the motherboard. Trust me, it is getting some serious wind. Additionally, I decided to find out if having my PC in the little cove affects the temperatures at all. It turns out, with the case panel removed, temperatures did not drop one bit. They both peaked and heated up the same. So that blows... If you looking to lower PWM, I don't know what the hell to tell you except put in a Dual Core, because that will drop them 20c right off the bat. Other than that, it appears some of these IP35-E's running hotter than others. That is the only logical conclusion I can come too.
There is absolutely no doubt in my mind any longer that I have something configured wrong. No doubt. I would stand before God right now and tell him that I am entire sure everything is setup optimally and that my chip and motherboard just run hot. Nothing I cao do about it! Really... Optimal air flow and still the boards love to fry eggs.
Well, anyway, I just wanted to update you guys here. At this point, I am done fiddling with my rig. It is now time to use it and play games and do whatever else... I hope this lasts me 3 years, if it does, all was good. The only upgrade I plan in the next year is a new Video Card and a New Hard Drive (Waiting for a faster and larger raptor - if it ever happens).
EDIT ** BTW, I plan to install my Tuniq Tower on my Dad's 939 3800+... I plan to beat the shit out of it for voltage and see if he can hit 3.0Ghz. On stock cooling he tops out at 2.66Ghz. This Tuniq Tower dominates the dual cores, so I am pretty sure we can up the voltage quite a bit more on his board. Mine as well put the Tuniq to good use, especially since it uses a different bracket.
Also, after testing everything, I am running the program CPU Burn in. It actually doesn't heat my PWM as much as Prime95. But, it does heat the CPU to the same temperature. I am guessing that Prime95 mixed mode moves a lot of ram and that in turn causes PWM temps to sky rocket. Who knows, just speculation at this point. I feel better though, when PWM is in the 70's rather than the 90's