Dell Vostro 3470 vs. HP EliteDesk 800 G2 SFF
Comparison and Differences
Differences between Dell Vostro 3470 and HP EliteDesk 800 G2 SFF
If you are looking for a more modern desktop, then you should go with the Dell Vostro 3470 which was released in 2018. The HP EliteDesk 800 G2 SFF is older and entered production in 2015.
Both models have the same form factor, meaning reoughtly they have the same phiysical size and form.
Processor
Usually the newer the generation of the CPU, the better the performance and efficiency is. If your budget allows it, you should go with the Dell Vostro 3470 as it is running a newer generation CPU. This is not to say that HP EliteDesk 800 G2 SFF is bad - it can still run some powerful CPUs, albeit being an older generation.
Memory
The HP EliteDesk 800 G2 SFF has 4 RAM slots while the Dell Vostro 3470 has only 2 slot(s). This is not something to worry about. Just make sure you take it into consideration when planning how much RAM you are going to use.
The Dell Vostro 3470 is using the faster 2666 MT/s RAM. The HP EliteDesk 800 G2 SFF is slower by supporting RAM speeds of up to 2133 MT/s. Additionally, if you will be needing a lot of RAM, better go for the HP EliteDesk 800 G2 SFF as it has the ability to run 64 GB of RAM. The Dell Vostro 3470 can do a bit less at max 32 GB. Most of the times, this should be sufficient for the majority of users.
Ports
In total the HP EliteDesk 800 G2 SFF has 10 USB ports. The Dell Vostro 3470 is inferior in this regard and packs 6 USB ports. In any case, if you miss USB ports, you can always purchase a USB hub. None of the desktop models has a USB 3.1 port (10Gb/s), so if you need a fast connection to your peripherals, like external Solid State Drive, you will need to look elsewhere.
Unfortunately, only the HP EliteDesk 800 G2 SFF has a DisplayPort. The Dell Vostro 3470 does not have one? Don't worry though, nowadays video adapters are cheap and you can get almost any combination of conversion types.
The Dell Vostro 3470 comes with an HDMI port, while the HP EliteDesk 800 G2 SFF does not support the interface. Of course missing HDMI port is something that can be easily fixed with a good adapter (e.g. DisplayPort to HDMI).
SATA ports are placed on the system board and it is where you connect your HDD, SSD and Optical Disk Drives. More SATA slots will allow you to have more drives running at the same time. In this regard the HP EliteDesk 800 G2 SFF is better equipped as it comes with 3 SATA slot(s), while the Dell Vostro 3470 has 2 slot(s).
If you want the fastest transfer speeds for your SSD, an M.2 interface is crucial. Thus, if the M.2 SSD slot is a mandatory requirement for you, go with the Dell Vostro 3470. Sadly, the HP EliteDesk 800 G2 SFF has no such slot, and you will be forced to use the SATA interface instead.
Make sure that the available M.2 slot supports the PCIe (also called NVMe) interface. This is important as there are M.2 slots which support only the inferior SATA III interface. For comparison, the SATA III interface has max speeds of 6Gb/s, while the PCIe 3.0 x4 will support speeds up to 32Gb/s!
Power Supply
Looking at the Power Supply Unit (PSU) of the two models we don't see any differences. For either of them you get a maximum power of 200 Watts. However be careful, many models have more than one power supply option. When buying your computer, it is a good idea to get a version with the most powerful PSU. This will potentially allow you to upgrade to a more powerful GPU for example.