Dell OptiPlex 990 MT vs. Lenovo ThinkCentre M93 Small Pro

Comparison and Differences

Dell_OptiPlex_990_MT.jpg case front and back pannelLenovo_ThinkCentre_M93_Small_Pro.jpg case front and back pannel
Model
Form factorMini TowerSmall
CPU optionsIntel Gen2 i3/i5/i7; Celeron; Pentium;Intel Gen4 i3/i5/i7; Pentium;
ChipsetQ67Q87
Dedicated GPU *GeForce GTX 1650GeForce GTX 1650 Low Profile
RAMDIMM DDR3-1333DIMM DDR3-1600
RAM slots44
RAM speed1333 MT/s1600 MT/s
RAM max16 GB32 GB
USB ports(10x)USB-A 2.0; (6x)USB-A 3.0; (2x)USB-A 2.0;
Video portsDisplayPort 1.2; VGA;(2x) DisplayPort; VGA;
Other portsRJ45; Hdph; (2x) Mic; Line-Out; Line-In; PS2/COM; Serial; RJ45; Hdph; (2x) Mic; Line-Out; Line-In; Serial;
Optional portsParallel(2x) PS2; Serial; Parallel; Media card reader (USB 2.0);
SATA ports44
PCI slotsPCIe 2.0 x16; PCIe 2.0 x4; PCIe 2.0 x1;PCIe 3.0 x16; PCIe 2.0 x1; PCIe 2.0 x16 (wired x4); PCI;
M.2 slotsN.A.N.A.
Drive bays(2x) 3.5in; (2x) 2.5in; (2x) 5.25in;2.5in; 2.5/3.5in; 5.25in;
PSU265 WTFX 240 W
Weight8.87 kg (19.55 lb)7.8 kg (17.20 lb)
Released20112013
Manuallinklink
Price**Check PriceCheck Price

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* 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 990 MT and Lenovo ThinkCentre M93 Small Pro

If you are looking for a more modern desktop, then you should go with the Lenovo ThinkCentre M93 Small Pro which was released in 2013. The Dell OptiPlex 990 MT is older and entered production in 2011.

If you are looking for the smaller form factor the Lenovo ThinkCentre M93 Small Pro is the right one for you. It is smaller than the Dell OptiPlex 990 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 Lenovo ThinkCentre M93 Small Pro as it is running a newer generation CPU. This is not to say that Dell OptiPlex 990 MT is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

Both models have have equal amount of ram slots (4 RAM). Usually two RAM slots are more than enough for most cases. However, the count should be taken into account when planning how much and what combination of RAM you are going to need for your system.

The Lenovo ThinkCentre M93 Small Pro is using the faster 1600 MT/s RAM. The Dell OptiPlex 990 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 Lenovo ThinkCentre M93 Small Pro as it has the ability to run 32 GB of RAM. The Dell OptiPlex 990 MT can do a bit less at max 16 GB. Most of the times, this should be sufficient for the majority of users.

Ports

In total the Dell OptiPlex 990 MT has 10 USB ports. The Lenovo ThinkCentre M93 Small Pro is inferior in this regard and packs 8 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.

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the Lenovo ThinkCentre M93 Small Pro comes with 2 ports, while the Dell OptiPlex 990 MT has only 1. If you are planning to use multiple monitors, the Lenovo ThinkCentre M93 Small Pro is the better choice.

None of the models has an HDMI port. If your monitor supports only the HDMI interface, you will need to buy an adapter. Such adapters are cheap so nothing to worry about.

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 990 MT, nor the Lenovo ThinkCentre M93 Small Pro 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 Lenovo ThinkCentre M93 Small Pro comes with a decent 240 Watt PSU, but the Dell OptiPlex 990 MT has a more powerful one rated at 265 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_990_MT_motherboard.jpg motherboard layoutLenovo_ThinkCentre_M93_Small_Pro_motherboard.jpg motherboard layout