Dell OptiPlex 990 DT vs. HP EliteDesk 800 G8 SFF

Comparison and Differences

Dell_OptiPlex_990_DT.jpg case front and back pannelHP_EliteDesk_800_G8_SFF.jpg case front and back pannel
Model
Form factorDesktopDesktop
CPU optionsIntel Gen2 i3/i5/i7; Celeron; Pentium;Intel Gen11 i5/i7/i9;
ChipsetQ67Q570
Dedicated GPU *GeForce GTX 1650 Low ProfileGeForce GTX 1650 Low Profile
RAMDIMM DDR3-1333DIMM DDR4-3200
RAM slots44
RAM speed1333 MT/s3200 MT/s
RAM max16 GB128 GB
USB ports(10x)USB-A 2.0; USB-C 3.2; (3x)USB-A 3.1; (3x)USB-A 3.0; (3x)USB-A 2.0;
Video portsDisplayPort 1.2; VGA;(2x) DisplayPort;
Other portsRJ45; Hdph; (2x) Mic; Line-Out; Line-In; PS2/COM; Serial; Parallel;RJ45; Hdph; Headset; Line-Out;
Optional portsN.A.DP1.4/ HDMI2.0b/ VGA/ USB-C(DP1.4)/ (2x)USB-A 3.0/ LAN/ Thunderbolt3; Serial; PS2; SD card reader
SATA ports34
PCI slotsPCIe 2.0 x16; PCIe 2.0 x4; PCIe 2.0 x1;PCIe 4.0 x16; (2x) PCIe 3.0 x1; PCIe 3.0 x16 (wired x4);
M.2 slotsN.A.M.2 2280 M-key (PCIe 3.0 x4); M.2 2280M-key (PCIe 4.0 x4); M.2 2230 (WiFi/BT);
Drive bays3.5in; 2.5in; 5.25in;2.5in; (2x) 3.5in; 9.5mm (slim);
PSU250 W260 W
Weight7.56 kg (16.67 lb)6.13 kg (13.51 lb)
Released20112021
Manuallinklink
Price**Check PriceCheck Price

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* 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 HP EliteDesk 800 G8 SFF

If you are looking for a more modern desktop, then you should go with the HP EliteDesk 800 G8 SFF which was released in 2021. The Dell OptiPlex 990 DT 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 HP EliteDesk 800 G8 SFF as it is running a newer generation CPU. This is not to say that Dell OptiPlex 990 DT 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 HP EliteDesk 800 G8 SFF is using the faster 3200 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 HP EliteDesk 800 G8 SFF as it has the ability to run 128 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 HP EliteDesk 800 G8 SFF 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. What is nice about the HP EliteDesk 800 G8 SFF, is that it has 3 USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the Dell OptiPlex 990 DT 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 HP EliteDesk 800 G8 SFF comes with 2 ports, while the Dell OptiPlex 990 DT has only 1. If you are planning to use multiple monitors, the HP EliteDesk 800 G8 SFF 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 HP EliteDesk 800 G8 SFF is better equipped as it comes with 4 SATA slot(s), while the Dell OptiPlex 990 DT 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 HP EliteDesk 800 G8 SFF. Sadly, the Dell OptiPlex 990 DT 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 990 DT comes with a decent 250 Watt PSU, but the HP EliteDesk 800 G8 SFF has a more powerful one rated at 260 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 layoutHP_EliteDesk_800_G8_SFF_motherboard.jpg motherboard layout