Alienware Aurora R12 vs. Dell Vostro 3900g

Comparison and Differences

Alienware_Aurora_R12.jpg case front and back pannelDell_Vostro_3900g.jpg case front and back pannel
Model
Form factorMid TowerMini Tower
CPU optionsIntel Gen11 i3/i5/i7/i9;Intel Gen4 i3/i5/i7; Pentium; Celeron;
ChipsetZ490H81
Dedicated GPU *GeForce RTX 3090GeForce GTX 1660 Super
RAMDIMM DDR4-3200/3400DIMM DDR3-1600
RAM slots42
RAM speed3400 MT/s1600 MT/s
RAM max128 GB16 GB
USB ports(6x) USB 3.0 Type A; USB 3.0 Type C; (6x) USB-A 2.0; USB 3.1 Type C; USB 3.1 Type A;(6x)USB-A 2.0; (2x)USB-A 3.0;
Video portsN/AHDMI 1.2; VGA;
Other portsRJ45; Headset; Line-Out; Line-In; S/PDFI optical/analog; Front, side, center, rare outputs;RJ45; Hdph; (2x) Mic; Line-Out; Line-In; PS2
Optional portsDisplayPortN/A
SATA ports44
PCI slots(x2) PCIe 3.0 x16; (x2) PCIe 3.0 x4;PCIe 2.0 x16; (2x) PCIe 2.0 x1; PCI
M.2 slotsM.2 2280/2230 M-key (PCIe 4.0 x4, NVMe); M.2 2230 (WiFi/BT); N.A.
Drive bays(2x) 2.5in; 3.25in;3.5in; 5.25in;
PSU550/1000 W300 W
Weight17.80 kg (39.24 lb)8.50 kg (18.73 lbs)
Released20212014
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 Alienware Aurora R12 and Dell Vostro 3900g

If you are looking for a more modern desktop, then you should go with the Alienware Aurora R12 which was released in 2021. The Dell Vostro 3900g is older and entered production in 2014.

If you are looking for the smaller form factor the Alienware Aurora R12 is the right one for you. It is smaller than the Dell Vostro 3900g 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 Alienware Aurora R12 as it is running a newer generation CPU. This is not to say that Dell Vostro 3900g is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

The Alienware Aurora R12 has 4 RAM slots while the Dell Vostro 3900g 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 Alienware Aurora R12 is using the faster 3400 MT/s RAM. The Dell Vostro 3900g 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 Alienware Aurora R12 as it has the ability to run 128 GB of RAM. The Dell Vostro 3900g 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 Alienware Aurora R12 has 15 USB ports. The Dell Vostro 3900g 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 Alienware Aurora R12, is that it has 3 USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the Dell Vostro 3900g 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.

Nowadays, almost every new computer comes equipped with a DisplayPort. However, none of the devices being compared here has one. Don't worry though, DisplayPort adapters are very cheap and you can get virtually any combination of conversion types.

The Dell Vostro 3900g comes with an HDMI port, while the Alienware Aurora R12 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.

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 Alienware Aurora R12. Sadly, the Dell Vostro 3900g 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 Dell Vostro 3900g comes with a decent 300 Watt PSU, but the Alienware Aurora R12 has a more powerful one rated at 1000 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

Alienware_Aurora_R12_motherboard.jpg motherboard layoutDell_Vostro_3900g_motherboard.jpg motherboard layout