According to your CoreTemp screen shot, you have the i7 975 XE CPU. And according to the
Intel specs for your CPU, the Tcase maximum temperature allowed is 67.9°C (154.2°F). FTR, typically computer temps are measured in Celsius and 165°F=73.9°C and is too high.
Tcase (Case Temperature) is the maximum temperature allowed at the processor Integrated Heat Spreader (IHS). Note that no TJunction value is given.
I have a Cooler Master Hyper T4 Heatpipe CPU Cooler on the CPU and a rear case fan and a large (about 8 inches) fan on the side panel and of course the power supply fan. I would think it would run cooler than this.
It should.
I don't like my CPU temps to go over 60°C (140°F) and sit there for more than a couple seconds. When they do sit over 60°C, that is typically a warning to me that I need to clean out the heat-trapping dust the case fans drew into the interior.
Note it is the case's job to supply the interior with a decent supply of cool air "flowing" through the case. It has been my experience that side panel fans often disrupt that flow and, in some cases, can be counterproductive to the cooling process. The exception is when the side fan fires into a tube that channels the flow directly onto the CPU or GPU (depending on position). This is not a concrete rule however as some cases provide great cooling with side panel fans.
You need to inspect the interior of your case and make sure it, the fans and vents are all clean of heat trapping dust. You may need to add another case fan to increase air flow, preferably in back to aid in exhausting heated air out, or in front to pull cool air in. "Blowhole" fans on top exhausting heated air out can be very effective too.
And contrary to what many believe and will tell you (and to what 3rd-party cooler makers claim), today's OEM coolers are excellent and more than adequate at keeping their CPUs adequately cooled, even with mild to moderate overclocking - in a properly cooled case, that is. For this reason, I am not a fan (no pun intended) of after market coolers with CPUs that came packaged with OEM coolers. Note that only Intel and AMD will replace your CPU if it fries due to it's supplied cooler failing. Are there better (and quieter) aftermarket coolers? Sure. But with properly configured case cooling you don't need them unless doing extreme overclocking, or when total silence is needed as with HTPCs (home theater PCs). That said, both Intel and AMD sell CPUs without coolers so, of course, in those situations, you must use an aftermarket cooler.
Also contrary to what many may tell you, TIM (thermal interface materials) don't wear out or
ever need periodic replacing
AS LONG AS the cured bond is never broken. It is, however, critical the TIM be properly applied when first applied. And the two most common mistakes when applying a new, fresh layer of TIM is failure to thoroughly clean the mating surfaces before applying the TIM, and applying too much TIM. The purpose of TIM is to fill the microscopic pits and valleys in the mating surfaces
only, and with as thin a layer as possible while still achieving complete coverage. Too much TIM is in the way and counterproductive to an efficient heat transfer process. So, did you apply a proper layer of TIM before mounting this cooler?
@jds63 - I believe that 2007 TechPowerUP guide is a bit (well...
way!) outdated now. Modern cases typically support multiple and large (120mm or larger) fans so there is no need to cut holes in a modern case as the guide states in Rule #1 must "always" be done. I would be more afraid I would fail to clean out all the loose metal filings that will be created and them (or even one) getting on my electronics. If the case needs the "cheese grater" vents cut out to provide an adequate flow of cool air, get a new case.