Acer Veriton M6650g vs. Dell OptiPlex 990 SFF

Comparison and Differences

Acer_Veriton_M6650g.jpg case front and back pannelDell_OptiPlex_990_SFF.jpg case front and back pannel
Model
Form factorMini TowerSmall
CPU optionsIntel Gen7 i3/i5/i7; Pentium; CeleronIntel Gen2 i3/i5/i7; Celeron; Pentium;
ChipsetQ270Q67
Dedicated GPU *GeForce GTX 1650 SuperGeForce GTX 1650 Low Profile
RAMUDIMM DDR4-2400DIMM DDR3-1333
RAM slots44
RAM speed2400 MT/s1333 MT/s
RAM max64 GB16 GB
USB ports(4x) USB-A 3.0; (4x) USB-A 2.0; USB-A 3.1; USB-C 3.1(10x)USB-A 2.0;
Video ports(2x) DisplayPort 1.2; HDMI; VGADisplayPort 1.2; VGA;
Other portsRJ45; (2x) Mic, Speaker; Line in; Line out; PS/2 portsRJ45; Hdph; (2x) Mic; Line-Out; Line-In; PS2/COM; Serial; Parallel;
Optional portsSerial; Parallel: Card readerN.A.
SATA ports53
PCI slotsPCIe 3.0 x16; PCIe 2.0 x1; PCI; PCIe 3.0 x16 (wired x4)PCIe 2.0 x16; PCIe 2.0 x4; PCIe 2.0 x1;
M.2 slotsM.2 2230 (WiFi/BT)N.A.
Drive bays(5x) 2.5/3.5in; 5.25 inch3.5in; 2.5in; 5.25in(slim);
PSU300/500 W240 W
Weight9.00 kg (19.84 lb)5.70 kg (12.57 lb)
Released20182011
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 Acer Veriton M6650g and Dell OptiPlex 990 SFF

If you are looking for a more modern desktop, then you should go with the Acer Veriton M6650g which was released in 2018. The Dell OptiPlex 990 SFF is older and entered production in 2011.

If you are looking for the smaller form factor the Dell OptiPlex 990 SFF is the right one for you. It is smaller than the Acer Veriton M6650g 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 Acer Veriton M6650g as it is running a newer generation CPU. This is not to say that Dell OptiPlex 990 SFF 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 Acer Veriton M6650g is using the faster 2400 MT/s RAM. The Dell OptiPlex 990 SFF 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 Acer Veriton M6650g as it has the ability to run 64 GB of RAM. The Dell OptiPlex 990 SFF can do a bit less at max 16 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 10. If this is not enough, using a USB hub is always a viable option. What is nice about the Acer Veriton M6650g, is that it has 2 USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the Dell OptiPlex 990 SFF 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.

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the Acer Veriton M6650g comes with 2 ports, while the Dell OptiPlex 990 SFF has only 1. If you are planning to use multiple monitors, the Acer Veriton M6650g is the better choice.

The Acer Veriton M6650g comes with an HDMI port, while the Dell OptiPlex 990 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 Acer Veriton M6650g is better equipped as it comes with 5 SATA slot(s), while the Dell OptiPlex 990 SFF 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 Dell OptiPlex 990 SFF, nor the Acer Veriton M6650g 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 990 SFF comes with a decent 240 Watt PSU, but the Acer Veriton M6650g 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.

Motherboard

Acer_Veriton_M6650g_motherboard.jpg motherboard layoutDell_OptiPlex_990_SFF_motherboard.jpg motherboard layout