50 is sweet as, I remember one time when I had replaced the CPU but hadn't mounted the cooler correctly. I was running World community Grid and I was getting over 90C (and over 60 when idle)! Needless to say I soon fixed the problem
Hi, I'd be a bit more careful about the motherboard temperature (probably it is taken somewhere near the northbridge or near the southbridge chip).
My ambient temp is minimum between 28 and 30 degrees (C) since I'm at the Kenyan coast just about 4 degrees south of the equator. My mobo temp is 40 idle, but its max even after hours of crysis 2 is 42. My midi tower casing is small (*really*) considering it hosts a performance system. The graphics card is an MSI GTX470 TwinFrozr, blowing at least half of its hot exhaust back into the case. The CPU is a Core 2 Quad (Q9550) running at stock 2,83 GHz. It has 3 HDDs plus a DVD burner and a Soundblaster XFi Xtreme Gamer. Plus 4x2GB Corsair Dominator 1066 memory. So I think I can say that a lot of heat is being generated inside my casing which does not really have much empty space left.
Temps after several hours of playing Crysis 2 in DX11 mode, 1280x1024, 2xAA.
CPU = 60
GPU = 75
Casing (near Northbridge) = 42
HDDs = 37 to 41 (39,37,41)
BTW, I'm on AIR cooling only, but have taken care that the machine can 'breath' well. The side covers are closed and they do not have air vents, let alone intake fans, so its only front bottom intake and top and top/rear (PSU) exhaust.
And no - my fans are not generating a noise like an F18 taking off at a distance of 20 metres. You can hear them, yes, but the noise is not disturbing at all.
I'd recommend you have a thorough look at the way your cables are routed inside the casing and if they possibly obstruct the air stream, and whether you have an option to improve air throughput by installing more or bigger case fans. I (being an electronics technician) would consider the 50 degrees for your motherboard not really being that brilliant. Components on the mobo might run rather hot which *will* cause premature aging. If your internal case temp is that high, it will also not exactly help the CPU to stay cool. Cooling a hot metal heat sink down using air that already has 45 to 50 degrees you are giving your CPU cooler a really hard time. Or do YOU use water cooling?
(I'm not talking about CPU or GPU temps here, but about safe operating temps for logic and peripheral components. Some GPUs are specified to be safe and stable even up to 100 degrees Tjunction and my CPU for instance is specified for a Tjmax of 100 degrees. That's core or on-die temperatures.)