Alienware X51 vs. Dell OptiPlex 5080 SFF

Comparison and Differences

Alienware_X51.jpg case front and back pannelDell_OptiPlex_5080_SFF.jpg case front and back pannel
Model
Form factorSmall GamingSmall
CPU optionsIntel Gen2&3 i3/i5/i7;Intel Gen10 i3/i5/i7; Pentium
ChipsetH61Q470
Dedicated GPU *GeForce GTX 1650 SuperGeForce GTX 1650 Low Profile
RAMDIMM DDR3-1333DIMM DDR4-2666/2933
RAM slots24
RAM speed1333 MT/s2933 MT/s
RAM max8 GB128 GB
USB ports(2x) USB 3.0 Type A; (6x) USB-A 2.0;USB 3.1 Type C; (5x) USB-A 3.0; (4x) USB-A 2.0;
Video portsHDMI(2x) Display Port 1.4;
Other portsRJ45; Headset; Line-Out; Line-In; S/PDFI optical/analog;RJ45; Headset; Line-Out/In;
Optional portsN.A.HDMI2.0b/DP1.4/VGA/USB Type-C (DP Alt Mode); Serial+PS2; SD4.0; 2xWiFi antenna;
SATA ports43
PCI slotsPCIe 3.0 x16;PCIe 3.0 x16; PCIe 3.0 x4 (open ended);
M.2 slotsN.A.M.2 2280/2230 M-key (PCIe 3.0 x4, NVMe); M.2 2230 (WiFi/BT)
Drive bays3.25in; 5.25in;3.5in/(2x)2.5in; 5.25in (slim);
PSU240/330 W200 W
Weight5.49 kg (12.10 lbs)5.25 Kg (11.57 lb)
Released20112020
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 X51 and Dell OptiPlex 5080 SFF

If you are looking for a more modern desktop, then you should go with the Dell OptiPlex 5080 SFF which was released in 2020. The Alienware X51 is older and entered production in 2011.

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 OptiPlex 5080 SFF as it is running a newer generation CPU. This is not to say that Alienware X51 is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

The Dell OptiPlex 5080 SFF has 4 RAM slots while the Alienware X51 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 Dell OptiPlex 5080 SFF is using the faster 2933 MT/s RAM. The Alienware X51 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 Dell OptiPlex 5080 SFF as it has the ability to run 128 GB of RAM. The Alienware X51 can do a bit less at max 8 GB. Most of the times, this should be sufficient for the majority of users.

Ports

In total the Dell OptiPlex 5080 SFF has 10 USB ports. The Alienware X51 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 OptiPlex 5080 SFF, is that it has 1 USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the Alienware X51 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 Dell OptiPlex 5080 SFF has a DisplayPort. The Alienware X51 does not have one? Don't worry though, nowadays video adapters are cheap and you can get almost any combination of conversion types.

The Alienware X51 comes with an HDMI port, while the Dell OptiPlex 5080 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 Alienware X51 is better equipped as it comes with 4 SATA slot(s), while the Dell OptiPlex 5080 SFF has 3 slot(s).

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 OptiPlex 5080 SFF. Sadly, the Alienware X51 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 OptiPlex 5080 SFF comes with a decent 200 Watt PSU, but the Alienware X51 has a more powerful one rated at 330 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_X51_motherboard.jpg motherboard layoutDell_OptiPlex_5080_SFF_motherboard.jpg motherboard layout