![]() ![]() I decided to keep things a little more retro and installed Windows 98 SE instead. I could install some iteration of Linux but my favorite ones won't run well in 256 MB. The next decision was which OS to install. It's possible that up to 512 MB would work but I wouldn't bet on it. In theory, this is the maximum amount of RAM supported but I haven't tested that theory. I replaced the single 64 GB module with two 128 MB 133 MHz SDRAM modules for a total of 256 MB. In addition to installing a hard drive, I also decided to upgrade the RAM. So step one was to install the hard drive. Instead, I found a 60 GB hard drive lying around that would work. However, there is only one IDE connector to connect the hard drive and the optical drive in a master slave configuration so the adapter wouldn't work unless I was willing to give up the optical drive. I thought about putting in a compact flash card as I had a couple of compact flash/IDE converters. No hard drive was included when I got my 300GL. This one is still running strong after all.Ĭeleron 300A "Mendocino" Slot 1 Processor (back) While IBMs were typically not the fastest around and not very upgradeable, they did tend to be well built, quiet and reliable. In any case, this seems to have been an intentional design decision by IBM presumably to keep people from inexpensively upgrading and forcing them to buy a whole new machine instead. HWiNFO32 and CPU-Z identify the mainboard as having a 440BX/ZX chipset. This limits the upgrade possibilities significantly. They were crippled with a 66 MHz bus though whereas the vast majority of computers with the BX chipset could also support a 100 MHz bus. The Celeron iterations were designed as an inexpensive way to buy into the IBM ecosystem. I believe that the 300GL iterations that came with Celeron processors were among the latest released even though they weren't the most capable. The Celerons were also missing the new SSE instructions that Pentium IIIs had but they were highly overclockable. 256K) but it ran at full clock speed instead of half speed. The cache was less than the Pentium IIIs of the time (128K vs. The Mendocino Celerons were essentially Pentium IIs with a small, on die cache. This particular one came with a 300 MHz Celeron (Mendocino). Machines were built with the 300GL designation with CPUs ranging from Pentium MMX to Pentium IIIs and everything in between. ![]() ![]() The IBM Personal Computer 300GL is a model designation that actually covered a pretty wide variety of different models. ![]()
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