Whew... such a relief.
I was testing some rather valuable high end AGP cards in my test system and one was crashing in certain games and benchmarks. I was pretty bumbed and spent quite a while comparing the two identical cards and checked things with a DMM, hoping that it wasn't the GPU or RAM failing. I decided I would retest the one that had seemingly worked fine and I have never been so happy to see a program crash! It crashed in the same way as the other one, so I pretty much knew it wasn't a bad card. Whew!
Now, I was slightly worried about my tester PC because it is my personal system from 2002-2004 which has had the same motherboard, case, CPU and cooler for 22 years. Was something in it finally dying?
First thing I checked was the BIOS, since the old Athlon XP 1700+ Thoroughbred B core has been sitting in the socket on that NF7-S 2.0 overclocked from 1.47 to 2.0Ghz for all these years. I noticed that the multiplier and FSB were set but for some reason the voltage settings were set to defaults. These were great overclocking chips but that seemed a bit... optimistic to say the least. I remembered that back in 2012-2013 (when I got this PC back from my sister who had been using it for several years) I installed a nice custom BIOS which allowed it to run stably with 2GB of RAM (2x512MB in one channel, 1x1GB in the other) while maintaining a 400Mhz FSB. It had previously been running with a 333Mhz FSB (x6 multi) to alleviate some RAM quirkiness with the stock BIOS. I have used the computer off and on for testing AGP cards and light gaming since then but never really put it through a ton of stress. Fast forward 11-12 years and I was really hoping I had taken a picture of the existing BIOS settings back then when I adjusted things.
Sure enough, in a LOT less time than it would have taken me to do research and figure out the proper voltage for this chip with this OC, I found those beautiful blue bios snap shots I took with a camera back in August of 2012. All the voltages were set to the default values except for the core voltage, which was at 1.65v back in the day (with the old 333x6 overclock on the stock BIOS). The default was 1.6v. Either the voltage setting got reset at some point by mistake, or I set it to defaults and just never had a problem until doing more rigorous testing. It's also possible the board or CPU has degraded a tad over the years, but I'm so happy and relieved to say that the system is rock solid now with the core voltage back at 1.65v, the way it had been set for the 10 or so years prior to 2012. I applied some new thermal paste as well for good measure.
I let the system run, playing the game that had been crashing with the video card I thought was having issues and it ran for almost an hour and a half without crashing, so it seems that the issue was just a lack of CPU voltage the whole time.
Talk about good news:
Two very valuable cards are working perfectly
My old NF7-S 2.0 is fine
My old XP 1700+ DUT3c JIUHB is fine
Whew. 😀
EDIT: Here is the old girl. I have probably mentioned this rig multiple times here but I don't think it's ever been pictured.
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This is a fairly common case from the time period, but I "custom painted" the trim around the bezel because the gray looked lame. I did the same to the power button but it has obviously worn off over the years. Also, that floppy drive I "custom painted" as well, using paint left over from a project car my brother painted back in the early '90s. I did the same to the CD-ROM drive originally as well, but that drive died and was swapped out.
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The only newer parts in this are the Seasonic 550HT PSU and a now-ancient 64GB Crucial C300 SSD (the Maxtor DiamondMax Plus 9 hard drive is original to the PC, but is not connected anymore). The fans are all original to the build... including the northbridge fan, which has needed cleaned and oiled a couple times but is still spinning! Currently have the 80mm Panaflo fan running at 5v for reduced noise when it's running in my office for a while. I can't take that noise anymore now that I'm used to silent PCs. 🤣
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I took a picture of the CPU when applying new thermal paste.
Kind of crazy to think all the places this thing has been with me and all the work it has done. I've owned it for more than half my life and that CPU has been significantly overclocked the whole time, sitting in that very socket. I don't think I have ever removed it.
I took this PC to work and used it there at my first job in high school 20 years ago, doing PC repair with extra long PATA and power cables hanging out the back of the computer so I could scan hard drives for malware (PATA is hot swappable if you are careful... and no I don't do this anymore). I also used it for LAN gaming there at work when we were on break. After that it went to my sister for many years. It has never had much of a break. Since getting back into "retro" PC hardware about 8 years ago it is back to being used the way it was at my first job, minus the sketchy PATA drive hot swapping and malware scanning. 😉