Feasibility of using "computer RAM" with a microcontroller project
It is 'just' DRAM, so you can interface it exactly like you would interface any other DRAM. Note though, that parallel DRAM is significantly more I/O intensive and very tough on simple microcontrollers as compared to SRAM. Also, 'computer' DRAM always has multiple packages of multiple banks of many pages, so you need to implement a bank/package aware driver. Otherwise you will only be able to address one of the chips (inside one of the packages).

As for timings: that's really easy. There is an i2c EEPROM on every bank that stores the timing data in a fairly straightforward manner (see the DDRx specification and search for SPD).

I would like to note, though, that although it's a cool little project, it wouldn't really be useful in a practical design. Computer DRAM is significantly more expensive to use and way overspecced for any microcontroller platform. An overview of the cost:


DRAM socket ($2 in small quantities)
Immensely large microcontroller ($15+ on top of whatever you have to get enough I/Os)
Fast, fairly beefy 1.8V DC/DC converter ($2.50 for a switcher)
Termination regulator ($1 for a Richtek part)
quite a bit of board space for the module


If you really need gigabytes of RAM, this may be the only economical option. However, if you only need a couple (tens of) megabytes, there are some excellent PSRAM chips (e.g. https://octopart.com/is66wve4m16bll-70bli-issi-21833083) that work on (less than) 48 I/Os (i.e. small microcontroller package sizes), cost sub-$5, require almost no board space and still have ample performance for any microcontroller.