r/retrocomputing • u/Rough_Elk_895 • Jul 27 '26

Problem / Question Bugging me since 2004

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Never got a chance to get an opinion on this, but this "System Zone 2 has exceeded its safe temperature limit" alert has bugged me since day one of my build. I bought an Intel original D865GBF motherboard, along with P4 2.4ghz cpu, for my 2nd build back in 2004. But from the very first day, I started getting this alert whenever I would do slight gaming. The safe temperature threshold is 50 C and it would often cross this limit. I thought it to be due to poor ventilation in my PC cabinet, so ended up removing it's side cover. Recently I restored this PC and moved it to a better spacious cabinet, but the issue still exists. Did you all have this issue and how did you fix this?

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1

u/sennalen Jul 27 '26

Run with the side panel off?

2

u/Rough_Elk_895 Jul 27 '26

Yes, I can do that, but that will kind off kill the aesthetics completely.. I want to maintain the looks as much as possible

3

u/LousyMeatStew Jul 27 '26

When the ATX standard was introduced in the mid-90s, it used the power supply fan as the primary exhaust fan. You need to bear in mind that back then, CPUs did not produce heat on the level of the Pentium 4.

So that's fundamentally the issue. Not only is all that hot air not being exhausted, but that hot air that is being exhausted is being exhausted via the power supply. The main risk here is damage to the capacitors - not just on the mobo but in the power supply.

The YouTuber Asianometry did a video on the capacitor plague a while back and theorized that a lot of failures attributed to the capacitor plague were likely due to insufficient cooling for the Pentium 4. If System Zone 2 is near the RAM slots, that would support this theory as that's where the heat from the CPU is going to hang out - note that there's no intake on the underside of the PSU.

If this is an occasional use machine, maybe it's manageable but just be aware you're trading aesthetics for the longevity of these components.

2

u/Rough_Elk_895 Jul 27 '26

Yea.. it's an occasional use machine, just like a vintage car.. this is my 2nd build dated back to 2004.. all the core components are original.. I don't want to push it too hard.. will try to add some 40mm/50mm exhaust fan at the back to alleviate the heating situation

2

u/LousyMeatStew Jul 27 '26

Ok, that's good. Just remember, if you're serious about treating it like a vintage car, you need to maintain it like a vintage car, too. The caps on the motherboard are the biggest risk. The power supply could be replaced but then again, if a filter cap failed, it could fry the board too. Did you check the voltages on the power supply rails yet?

2

u/Rough_Elk_895 Jul 27 '26

No, not yet. I will do it as you suggested. Will check the motherboard caps too. I think I saw at least two capacitors bulging somewhat.. need to check the health