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It's been record-breaking hot here in our part of the world.
As having the a/c on all day dries our throats out, we occasionally switch it off whereupon the living room temperature rises to 30º.
I keep an eye on my CPU temp (AMD Athlon 64x2 dual core, ducted air cooling from outside the PC) and it gets to around 50º, maybe 52º on one core, the other a few degrees less, under these conditions.
I've tried all manner of additional cooling systems, some of such stupendious primitive construction (taking blanking plates off front of PC and fitting a 12v fan to blow air into the case) that I won't reproduce photographs here. None had any effect.
Putting the a/c on gets thr room down to 26ºc and the CPU drops to around 48º max.
Pending the usual autumnal rebuild (and cleaning of cooling fins !) are these temperature differentials between ambient air and CPU temps. normal ?
Depending on the processor, the manufacturer, how fast it runs, where the sensor is located, and what programs it is currently running will determine the temperature of what the processor should be. However, this document should give you a general idea of what the processor should be running at as well as what is acceptable and what is not.
The majority of today's desktop processors should not exceed temperatures of 95C and most will run between 70-90C.
Depending on the specific CPU, your limit will be from as low as 63 up to 72.
I've got three of these, all 89W units, usually in the 30-40 degree range, all with stock AMD cooler & fan. One PC CPU does tend to get noticeably hotter than the others in the summer - I'm not sure if this is an airflow or thermal paste problem - and the fans are definitely busier as a result. Still only gets up to 51-52, ambient around 28.
You can't have everything - where would you put it?
I wouldn't worry about it. If you have a decent CPU cooler, just let it do its job - if it's too hot, it will throttle or shut down. I have also yet to find a CPU (Pentium 2, 3, 4, Athlon XP, Pentium M, Core duo, Core 2) that cannot withstand temperatures of at least 80 degrees. I run an AMD powered server in my loft and it is often 35 degrees in there in the summer - fans make a racket (can't be heard outside of the loft though!) but it continues to work just fine. No idea of CPU temps.
I took two blanking panels off the front of the PC, which obviously allows more air in, and the temperature has dropped about two degrees. I've got two spare fans here and Any Time Real Soon (tomorrow if I get bored) I'll fit 'em, probably one in the back sucking out and one in the front sucking in.
Computer back on line after check - not nearly as dusty inside as I thought it would be although leading edges of CPU cooler fan covered with a sort of greasy dust (!) that needed scraping off. Fitted an extra fan on the outside of the case to blow air into the CPU cooler duct, this fan runs all the time (very quiet 12v) so keeps a flow of external air to the CPU even after the off or standby switch is pushed and reduces the rise in CPU temperature as the internal CPU fan shuts down. Core temps now about 5º cooler although cooler weather is playing its part.
I have also looked at water cooling but wonder whether they ever leak, because if so the consequences would be serious
A question: every form of CPU cooler (air or water) relies on blowing ambient air over some form of cooling fins. There is obviously a limit to just how much coolth you get out of ambient air, and the hotter the ambient air is, the less CPU cooling you are going to get....I wonder what the lower limit is (i.e. the maxium cooling) you can get out of still air ?
Sure, magazines often publish tests as to which is the most efficient cooler, but there is always going to be a limit imposed by ambient air temperature.
Mr D: some months ago I accidently bought a "build your own PC" magazine intended for gamers. Inside was a mega test on CPU coolers. Surprisingly the water coolers didn't come out best. Considered pricey, cumbersome and not offering that much of an advantage if any over pure air coolers.
If I may beg indulgence from the Mods, the recommended best buys were as follows:
For the AMD and the Intel CPU, the Thermaltake Frio
For the Intel CPU and you want quietness, the Cogage Arrow
Yeah, GG, that's more like it and seems the only way to go with ambient air over 30ºc - in fact our swimming pool (no heating, the water is just lying there indoors but in the sun, big windows) is also over 30ºc.
I have a small solid-state cooler box (12v dc or 220v ac) which would be ideal, in fact I did consider taking the cooling unit out and fitting that in my ATX case, until I realised how much condensation water drips off the Peltier fins on humid days ! The ATX case and the cooler box are about the same size and beer gets VERY cold in the cooler box, so this would be ideal in the ATX, fitted with a drip tray and pipe to the outside. Maybe a brass pipe.....oak drip tray...brass header tank with nice analogue contents dial over it...rotary brass handle to top up water tank....I feel an attack of steampunk coming on.
I just disabled AMD's "cool 'n quiet" and can detect no difference to the cool or the quiet. Anyone else found this ?
re liquid cooling systems I've seen several which leak, and all the rest seem to lose fluid through evaporation. The leaks aren't helped by the fact that the cooling solution is usually a water / glycol mix and seems to find weak joints very easily. Topping up the reservoir can be a right PITA, especially if (as on some) the system doesn't prime properly and you have to try to draw out the air locks by bending / twisting the pipes. Not worth the grief in my opinion