Dell G5 5090 vs. Lenovo ThinkCentre M800 Tower

Comparison and Differences

Dell_G5_5090.jpg case front and back pannel

Lenovo_ThinkCentre_M800_Tower.jpg case front and back pannel

Model
Form factor	Mini Tower	Mini Tower
CPU options	Intel Gen9 i3/i5/i7/i9;	Intel Gen6 i3/i5/i7; Celeron; Pentium;
Chipset	H370	Q150
Dedicated GPU *	GeForce RTX 2080	GeForce GTX 1650
RAM	DIMM DDR4-2666	DIMM DDR4-2133
RAM slots	4	4
RAM speed	2666 MT/s	2133 MT/s
RAM max	64 GB	64 GB
USB ports	(5x) USB 3.0 Type A; (4x) USB-A 2.0; USB 3.0 Type C;	(6x)USB-A 3.0; (2x)USB-A 2.0;
Video ports	N/A	(2x) DisplayPort 1.2; VGA;
Other ports	RJ45; Headset; Mic; Line-Out; Front, side, center, rare outputs;	RJ45; Hdph; (2x) Mic; Line-Out; Line-In; Serial;
Optional ports	N.A.	2x USB-A 2.0; Media card reader (USB 2.0); (2x) PS2; eSATA;
SATA ports	3	3
PCI slots	PCIe 3.0 x16; PCIe 3.0 x4; PCIe 3.0 x1;	PCIe 3.0 x16; PCIe 3.0 x1; PCIe 3.0 x16 (wired x4); M2 to PCI adapter (optional);
M.2 slots	M.2 2230 (WiFi/BT); M.2 2230/2280 M-key (PCIe 3.0 x4, NVMe);	M.2 (WiFi/BT or PCI extension card)
Drive bays	(2x) 2.5in; 3.25in;	(2x) 2.5/3.5in; (2x) 5.25in;
PSU	360/460 W	ATX 250
Weight	8.20 kg (18.07 lbs)	12.5 kg (27.5 lb)
Released	2019	2015
Manual	link	link
Price**	Check Price	Check 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 G5 5090 and Lenovo ThinkCentre M800 Tower

If you are looking for a more modern desktop, then you should go with the Dell G5 5090 which was released in 2019. The Lenovo ThinkCentre M800 Tower 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 G5 5090 as it is running a newer generation CPU. This is not to say that Lenovo ThinkCentre M800 Tower 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 Dell G5 5090 is using the faster 2666 MT/s RAM. The Lenovo ThinkCentre M800 Tower is slower by supporting RAM speeds of up to 2133 MT/s. In addition, you will be able to install the same amount of RAM in both models, and most probably 64 GB of RAM will be enough for most people. However, if you will be needing more RAM, make sure to check other desktop models too.

Ports

In total the Dell G5 5090 has 9 USB ports. The Lenovo ThinkCentre M800 Tower 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. What is nice about the Dell G5 5090, is that it has 2 USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the Lenovo ThinkCentre M800 Tower has no such port, thus restricting your transfer speeds significantly. For people who want to use external drives on regular basis, this might be an issue.

Unfortunately, only the Lenovo ThinkCentre M800 Tower has a DisplayPort. The Dell G5 5090 does not have one? Don't worry though, nowadays video adapters are cheap and you can get almost any combination of conversion types.

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 3 SATA slot(s). Keep in mind that having too few SATA slots might limit your options for connecting additional memory drives.

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 G5 5090. Sadly, the Lenovo ThinkCentre M800 Tower 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

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 M800 Tower comes with a decent 250 Watt PSU, but the Dell G5 5090 has a more powerful one rated at 460 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.