Cooling My Precision 490's FBDIMM
- Thread starter Hello man
- Start date
FBDIMMs inherently run hot as a consequence of their design. A significant part of the memory datapath is shifted from the memory controller to the DIMM itself.
45 degrees is quite cool for those. You can safely turn your blower down. Play with it until they're between 55 and 60
I've only ever used a memory cooler on one PC as the CPU was water cooled and the memory was a rather power-hungry high performance DDR2 variant.
The cooler that I used is the OCZ XTC. I'm normally not a fan of OCZ but I must say that it's one of their better products and the price was certainly right at around $20 for a pair of 60mm fans. It's definitely one of the quieter ones around, especially if you hook it up to an onboard fan header and use PWM control.
DDR2-FBDIMMs are roughly the same height and depth as DDR2-DIMM so the cooler should fit just fine.
60 degrees centigrade may seem hot to the touch for us water based organisms, but 60 degrees centigrade is rather cool for most electronics. FBDIMMs run much hotter than standard UDIMM/RDIMM because they have a power hungry buffer chip with high speed serial transceivers on-board.
EDIT: link to a review http://www.techpowerup.com/reviews/OCZ/XTCMemoryCooler/
23 degrees is wayyyy too low for an accurate CPU temperature. That is at or around ambient room temperature. The minimum idle spread is around 10 degrees, so any reading under 30 degrees is typically caused by a poorly calibrated sensor.
These components can take an awful lot of heat, so don't sweat the temperatures too much.
PS: I edited a link into my previous post
That's most likely not right, I've seen this quite often with FX-8000 series microprocessors. I've had some people swear that they idle at below ambient, which is physically impossible without phase change cooling (EDIT: or TEC cooling) as neither air cooling nor liquid cooling exploit enthalpy of vaporization. 32 degrees would be a very nice idle temperature, but it's highly unlikely that you're running 32 degrees at approximately half load while overclocked. Borked sensors are common, as are miscalibrated sensors. Sometimes this is fixed by firmware updates though.
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