Acer Veriton S6620g vs. Lenovo ThinkCentre M900 Tower

Comparison and Differences

Acer_Veriton_S6620g.jpg case front and back pannel

Lenovo_ThinkCentre_M900_Tower.jpg case front and back pannel

Model
Form factor	Mini Tower	Mini Tower
CPU options	Intel Gen3 i3/i5/i7; Pentium	Intel Gen6 i3/i5/i7; Celeron; Pentium;
Chipset	Q77	Q170
Dedicated GPU *	GeForce GTX 1650 Super	GeForce GTX 1660 Super
RAM	UDIMM DDR3-1600	DIMM DDR4-2133
RAM slots	4	4
RAM speed	1600 MT/s	2133 MT/s
RAM max	32 GB	64 GB
USB ports	(2x) USB-A 3.0; (6x) USB-A 2.0	(8x)USB-A 3.0;
Video ports	(2x) DisplayPort 1.2; DVI	(2x) DisplayPort 1.2; VGA;
Other ports	RJ45; (2x) Mic, Headset; Line in; Line out; PS/2 ports; Serial	RJ45; Hdph; (2x) Mic; Line-Out; Line-In; Serial;
Optional ports	Parallel; Serial	2x USB-A 2.0; Media card reader (USB 2.0); (2x) PS2; eSATA;
SATA ports	6	3
PCI slots	PCIe 2.0 x16; PCIe 2.0 x16 (wired x4); PCIe 2.0 x1; PCI	PCIe 3.0 x16; PCIe 3.0 x1; PCIe 3.0 x16 (wired x4); M2 to PCI adapter (optional);
M.2 slots	N.A	M.2 (WiFi/BT or PCI extension card)
Drive bays	(4x) 3.5in; 5.25 inch	(2x) 2.5/3.5in; (2x) 5.25in;
PSU	300/500 W	ATX 250/400 W
Weight	7.00 kg (15.40 lb)	12.5 kg (27.5 lb)
Released	2013	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 Acer Veriton S6620g and Lenovo ThinkCentre M900 Tower

If you are looking for a more modern desktop, then you should go with the Lenovo ThinkCentre M900 Tower which was released in 2015. The Acer Veriton S6620g is older and entered production in 2013.

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 Lenovo ThinkCentre M900 Tower as it is running a newer generation CPU. This is not to say that Acer Veriton S6620g 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 M900 Tower is using the faster 2133 MT/s RAM. The Acer Veriton S6620g is slower by supporting RAM speeds of up to 1600 MT/s. Additionally, if you will be needing a lot of RAM, better go for the Lenovo ThinkCentre M900 Tower as it has the ability to run 64 GB of RAM. The Acer Veriton S6620g can do a bit less at max 32 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.

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the Lenovo ThinkCentre M900 Tower comes with 2 ports, while the Acer Veriton S6620g has only 1. If you are planning to use multiple monitors, the Lenovo ThinkCentre M900 Tower 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 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 Acer Veriton S6620g is better equipped as it comes with 6 SATA slot(s), while the Lenovo ThinkCentre M900 Tower has 3 slot(s).

M.2 SSD interface allows you to transfer data with higher speeds compared to the old SATA interface. Unfortunately, neither the Lenovo ThinkCentre M900 Tower, nor the Acer Veriton S6620g 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 M900 Tower comes with a decent 400 Watt PSU, but the Acer Veriton S6620g has a more powerful one rated at 500 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.