Dell OptiPlex 390 MT vs. Fujitsu Esprimo E520

Comparison and Differences

Dell_OptiPlex_390_MT.jpg case front and back pannelFujitsu_Esprimo_E520.jpg case front and back pannel
Model
Form factorMini TowerSmall
CPU optionsIntel Gen2 i3/i5/i7; Celeron; Pentium;Intel Gen4 i3/i5/i7; Pentium; Celeron
ChipsetH61B85
Dedicated GPU *GeForce GTX 1650 SuperRadeon RX 6400 Low Profile
RAMDIMM DDR3-1333UDIMM DDR3-1600
RAM slots24
RAM speed1333 MT/s1600 MT/s
RAM max8 GB32 GB
USB ports(8x)USB-A 2.0; (2x) USB-A 3.0; (6x) USB-A 2.0
Video portsHDMI 1.2; VGA;DVI; VGA
Other portsRJ45; Hdph; (2x) Mic; Line-Out; Line-In; PS2/COM;RJ45; Headphones; (2x) Mic; Line in; Line out; PS/2; Serial
Optional portsN.A.Parallel; eSATA; DisplayPort
SATA ports44
PCI slotsPCIe 2.0 x16; (3x) PCIe 2.0 x1;PCIe 3.0 x16; (2x) PCIe 2.0 x1; PCIe 2.0 x16 (wired x4)
M.2 slotsN.A.N.A.
Drive bays(2x) 3.5in; (2x) 5.25in;(2x) 3.5in; 5.25 inch
PSU265 W280 W
Weight8.87 kg (19.55 lb)10.00 kg (24.00 lb)
Released20112014
Manuallinklink
Price**Check PriceCheck Price

** As an Amazon associate we earn from qualifying purchases.
* Dedicated GPU warning: Check if your particular power supply model has enough power. Additionally some PSUs don't come with an auxiliary PCIe power connector and you may need to buy a SATA to PCIe power adapter.

Differences between Dell OptiPlex 390 MT and Fujitsu Esprimo E520

If you are looking for a more modern desktop, then you should go with the Fujitsu Esprimo E520 which was released in 2014. The Dell OptiPlex 390 MT is older and entered production in 2011.

If you are looking for the smaller form factor the Fujitsu Esprimo E520 is the right one for you. It is smaller than the Dell OptiPlex 390 MT and will fit more easily under your desk.

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 Fujitsu Esprimo E520 as it is running a newer generation CPU. This is not to say that Dell OptiPlex 390 MT is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

The Fujitsu Esprimo E520 has 4 RAM slots while the Dell OptiPlex 390 MT 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 Fujitsu Esprimo E520 is using the faster 1600 MT/s RAM. The Dell OptiPlex 390 MT is slower by supporting RAM speeds of up to 1333 MT/s. Additionally, if you will be needing a lot of RAM, better go for the Fujitsu Esprimo E520 as it has the ability to run 32 GB of RAM. The Dell OptiPlex 390 MT can do a bit less at max 8 GB. Most of the times, this should be sufficient for the majority of users.

Ports

Both models have the same amount of USB ports for total count of 8. If this is not enough, using a USB hub is always a viable option. 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 Fujitsu Esprimo E520 has a DisplayPort. The Dell OptiPlex 390 MT 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 OptiPlex 390 MT comes with an HDMI port, while the Fujitsu Esprimo E520 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 slots are located on the motherboard and it is where SSD, HDD and Optical Disk Drives are connected. Each of the two models being compared have 4 SATA slot(s). Keep in mind that having too few SATA slots might limit your options for connecting additional memory drives.

M.2 SSD interface allows you to transfer data with higher speeds compared to the old SATA interface. Unfortunately, neither the Dell OptiPlex 390 MT, nor the Fujitsu Esprimo E520 has one. However, you can still use a SATA SSD drive which should give you satisfactory performance.

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

Having a Power Supply Unit with high power rating is important, if you are going to use components which require extra power. The Dell OptiPlex 390 MT comes with a decent 265 Watt PSU, but the Fujitsu Esprimo E520 has a more powerful one rated at 280 Watts. Choosing either one depends on your specific requirements and use case. Also don't forget that some models might have more than one PSU option - try to always get the most powerful one, especially if you plan to upgrade to a powerful GPU.

Motherboard

Dell_OptiPlex_390_MT_motherboard.jpg motherboard layoutFujitsu_Esprimo_E520_motherboard.jpg motherboard layout