I am not strictly new to OC'ing, but I have never gone into it heavily, and have never pushed a system to it limits. Yesterday I installed a shiny new HS+F and so I have been pushing my OC up to levels I have never ventured to before and I need some advice from the more experienced OC'ers among you. I have a Phenom II X4 940 BE with a Titan Fenrir V2 slapped on top of it, using Arctic Silver 5 TIM. Current stable settings (6 hrs of prime95 and counting): 940 OC'ed to 3.6GHz. (18X multiplier) (Stock: 3.0GHz with 15x multiplier) CPU Vcore is at 1.41. (Stock 1.35) Current max core temp is 67 degrees C. (Normally fluctuates between 65/66, but has peaked once at 67) No other settings currently touched. I would like to ask the more experienced OC'ers if that Vcore is safe for this chip for a permanent OC? And also if that is a safe temp for the cores (Again for a permanent OC.) Additionally, if I wished to push the CPU further (if it is safe to do so that is), what is the max Vcore and/or Temp I should be looking at for the 940 (obviously with a safety margin because of chip to chip differences), and are there any other settings for tweaking the cpu I should be aware of to help with stability? Another thing I need advice about is a replacement 120mm fan for the Fenrir. Currently in prime95 the cores are sitting at around 65/66 on full load, and the Fenrir's fan is running at full tilt. I don't mind the whooshing noise of the air being pushed about (Lets face it it is no where near as load as the stock HS+F I have been using up to now), but the fan does have extra noise from the bearing that I find annoying. At about 1850 RPM there is rather a lot of bearing rattle/clicking. I know this is rarely eliminated fully due to the nature of bearings, but this particular fan seems to be a fairly bad one, to the point that it isn't really ignorable. Also at full tilt (Around 2270 RPM) there is an annoying pair of noises from the fan, a low buzzing from the blades and a separate weird sound from the bearing. I'd call it a squeal, but it isn't high pitched enough, and it is difficult to explain - so I shan't bother and just leave it as an annoying sound I want rid of. So can anyone recommend a 120mm fan that is quieter, but has at least the same CFM shifting power? And by 'same CFM shifting power' I mean real world figures and not the make believe numbers manufacturers use for advertising.