The RAM is likely fairly generic - it'll be branded, for sure, but HPl have many 'volume' agreements with providers. Unlikely to be the same 'brand' of RAM in all. Chances are 99.99% it's going to be the generic-looking, green RAM modules.
It's a functional workstation, it's not designed/intended to be looked at.
The CPU is still fine - it's a locked CPU though, so keep that in mind.. The only i7 I can find listed for the Z230 spec is the 4790 though, not the 4470 so double-check (slightly higher base clock & turbo with the 4790 but otherwise, no real difference). Might simply be a model of the Z230 that's been replaced though.
As an FYI, a lot of Dell workstations use proprietary motherboards and sometimes PSUs, so upgrading...