Recently a friend gave his lightly used Toshiba laptop to his 9 year old grandson who promptly returned it. "To slow" he said. So I was next on the donation list.
A Toshiba C655, 15.5" 1366x768 display, Intel Celeron 900 (64bit) single core, 2gb ram, 250gb hdd, from about 2010. The Celeron 900 has a Passmark v9 score of 658, pretty decent for a single core and it came with MS Win7. It could run Fossapup64 9.5 pretty well and could stream Youtube videos without issue. But, as usual, I couldn't resist upgrading it. Many manufacturers of that time sold systems like this as entry level and budget choices. The good news, most could be significantly upgraded with ram and cpu swaps.
A quick check on the web showed the C655 could handle a Intel T9500 dual core. Checking Ebay, and as I guessed, those were selling at a premium price of $36 US. From previous experience, I stepped down a couple of notches and chose a T8300, price $6 US. The T9500 had a Passmark = 1698, the T8300 = 1401, not a bad loss for 1/6 the price.
I'd rate the tear down as about "medium" difficulty, you've got to remove the top half of the case and keyboard, then remove the motherboard from the lower half to swap the cpu. Laptop teardown is puzzle work so found a Youtube video on a teardown of a similar model which was helpful, although the poster removed about 8 more screws than required to pull the motherboard.
Popped in another 2gb of ram and now have a dual core, 4gb system that is quite snappy. Runs dual boot Puppy Linux + MS Windows 10, both 64bit. Overall, it runs on par with the Dell D630 that @mikewalsh and I both have.
Total expenditure = $10 US.
Just for fun I also tried it with a cheap SSD drive, boot time for Win10 went from 88 seconds to 20 seconds. To my surprise Puppy also booted in 20 seconds.
Was a good rainy day project, Toshiba C655 lives to fight another day.
wizard