Dell OptiPlex 990 DT vs. Dell XPS 8300

Comparison and Differences

Dell_OptiPlex_990_DT.jpg case front and back pannelDell_XPS_8300.jpg case front and back pannel
Model
Form factorDesktopMini Tower
CPU optionsIntel Gen2 i3/i5/i7; Celeron; Pentium;Intel Gen2 i3/i5/i7;
ChipsetQ67H67
Dedicated GPU *GeForce GTX 1650 Low ProfileGeForce GTX 1650 Super
RAMDIMM DDR3-1333DIMM DDR3-1333/1600
RAM slots44
RAM speed1333 MT/s1600 MT/s
RAM max16 GB32 GB
USB ports(10x)USB-A 2.0; (8x) USB-A 2.0; (2x) USB 3.0;
Video portsDisplayPort 1.2; VGA;HDMI 1.2; VGA;
Other portsRJ45; Hdph; (2x) Mic; Line-Out; Line-In; PS2/COM; Serial; Parallel;RJ45; eSATA; S/PDIF; Mic; Headset;
Optional portsN.A.N.A.
SATA ports34
PCI slotsPCIe 2.0 x16; PCIe 2.0 x4; PCIe 2.0 x1;PCIe 2.0 x16; PCI; mPCIe;
M.2 slotsN.A.N.A.
Drive bays3.5in; 2.5in; 5.25in;(2x) 3.5in; (2x) 5.25in;
PSU250 W460 W
Weight7.56 kg (16.67 lb)10.18 kg (22.44 lb)
Released20112011
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 Dell OptiPlex 990 DT and Dell XPS 8300

Both computers, the Dell OptiPlex 990 DT and the Dell XPS 8300, were released during the same year - 2011.

If you are looking for the smaller form factor the Dell OptiPlex 990 DT is the right one for you. It is smaller than the Dell XPS 8300 and will fit more easily under your desk.

Processor

The two models have the same generation of Intel processors. We think that the 2 generation of Intel Processors have enough power to execute all of the home and office tasks that most people will care to do.

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 XPS 8300 is using the faster 1600 MT/s RAM. The Dell OptiPlex 990 DT 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 XPS 8300 as it has the ability to run 32 GB of RAM. The Dell OptiPlex 990 DT 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 Dell XPS 8300 has 10 USB ports. The Dell OptiPlex 990 DT 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. 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.

Unfortunately, only the Dell OptiPlex 990 DT has a DisplayPort. The Dell XPS 8300 does not have one? Don't worry though, nowadays video adapters are cheap and you can get almost any combination of conversion types.

The Dell XPS 8300 comes with an HDMI port, while the Dell OptiPlex 990 DT 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 Dell XPS 8300 is better equipped as it comes with 4 SATA slot(s), while the Dell OptiPlex 990 DT 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 DT, nor the Dell XPS 8300 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 DT comes with a decent 250 Watt PSU, but the Dell XPS 8300 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.

Motherboard

Dell_OptiPlex_990_DT_motherboard.jpg motherboard layoutDell_XPS_8300_motherboard.jpg motherboard layout