jrmunday
Hi tlw,
Are you using water cooling or just a decent air cooler?
Am about to upgrade to a i7 3770k myself.
Air cooled. I don't like the idea of mixing plumbing with electronics, or the complexity and maintenance. From what I've seen (and heard) many water cooling pumps and radiator fans are pretty noisy in any case.
I designed this PC from the ground up with power and lack of noise in mind. I'm fussy about components and stress-test and temperature monitor everything once built so I don't get nasty surprises later. Stress testing is something anyone building a PC with non-standard cooling should do - mistakes can be expensive.
To go into the gory details:
The bits not in my sig are:
Seagate 460W fanless PSU (in lower rear of case).
cpu cooler is a Noctua NHC14, using a single Noctua 140mm fan between cooler and cpu, which also cools the m/b around the cpu.
Graphics card is a Sapphire fanless HD7750.
Case is a Fractal Design Define R4, using the two fans supplied with it as case fans at front and rear (I rubber mounted them rather than use the supplied screws). The Fractal Design isn't cheap, but it's well designed and built, very solid, damped, vibration free and very nice to work with.
All fans run at 5 volts, fixed speed, for DAW usage.
Idle cpu temps across the cores are between 16 and 30 degrees C - like most multi-core cpus no two cores ever agree about the temperature, especially at idle :-/.
Using Prime95 64bit to push all cores to 100% @ 3903.89 MHz for 5 minutes takes the maximum cpu core temp to 76C where it seems to pretty much stabilise, ending the test drops the temps back towards idle in a second or two. Cpu throttling should cut in at 105 degrees but I've never managed to get it anywhere near that.
Under real world conditions (i.e. not stress testing), pushing a 3770K to 100% across all cores and holding it there would take some doing.
With fans at 5 volts the PC is just audible in a pretty quiet small room, measuring about 30-32dBA at around 1 metre, checked with an expensive UK-government issued, correctly calibrated decibel meter my (civil-servant) wife uses for work. Basically not really distinguishable from background noise. Increasing the fans to 7 volts adds a fair bit of of cooling but doesn't add much noise.
Overall, it's a quiet enough PC that it barely registers on mics so long as they aren't close and pointing directly at it. Otherwise, it's lost in the background.
3D apps/games need more cooling (mostly for the gpu), so I just ramp up the fans to 12volts. And it's still quieter than an off the shelf PC. It's also very quiet electrically and Telecaster pickup friendly, though that's always a bit of a matter of luck.
Quite an improvement in every way over the 100+watt processors and power hungry graphics cards of the last few years. It even uses less electricity :-)