Dell OptiPlex 790 SFF vs. HP EliteDesk 800 G3 Tower

Comparison and Differences

Dell_OptiPlex_790_SFF.jpg case front and back pannelHP_EliteDesk_800_G3_Tower.jpg case front and back pannel
Model
Form factorSmallMini Tower
CPU optionsIntel Gen2 i3/i5/i7; Celeron; Pentium;Intel Gen6&7 i3/i5/i7; Celeron; Pentium;
ChipsetQ65Q270
Dedicated GPU *GeForce GTX 1650 Low ProfileGeForce GTX 1660 Super
RAMDIMM DDR3-1333DIMM DDR4-2400
RAM slots44
RAM speed1333 MT/s2400 MT/s
RAM max16 GB64 GB
USB ports(10x)USB-A 2.0; USB-C 3.0; (6x)USB-A 3.0; (4x)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; Line-In;
Optional portsN.A.DP/HDMI/VGA/USB-C(DP); Serial; SD card reader;
SATA ports35
PCI slotsPCIe 2.0 x16; PCIe 2.0 x4; PCIe 2.0 x1;PCIe 3.0 x16; (2x) PCIe 3.0 x1; PCIe 3.0 x16 (wired x4);
M.2 slotsN.A.M.2 2280 M-key (PCIe x4); M.2 2230 (WiFi/BT);
Drive bays3.5in; 2.5in; 5.25in(slim);2.5in; (2x) 3.5in; 5.25in; 5.25in (slim);
PSU240 W250/500 W
Weight5.70 kg (12.57 lb)9.8 kg (21.7 lb)
Released20112017
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 790 SFF and HP EliteDesk 800 G3 Tower

If you are looking for a more modern desktop, then you should go with the HP EliteDesk 800 G3 Tower which was released in 2017. The Dell OptiPlex 790 SFF is older and entered production in 2011.

If you are looking for the smaller form factor the Dell OptiPlex 790 SFF is the right one for you. It is smaller than the HP EliteDesk 800 G3 Tower 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 HP EliteDesk 800 G3 Tower as it is running a newer generation CPU. This is not to say that Dell OptiPlex 790 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 HP EliteDesk 800 G3 Tower is using the faster 2400 MT/s RAM. The Dell OptiPlex 790 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 HP EliteDesk 800 G3 Tower as it has the ability to run 64 GB of RAM. The Dell OptiPlex 790 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. 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.

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the HP EliteDesk 800 G3 Tower comes with 2 ports, while the Dell OptiPlex 790 SFF has only 1. If you are planning to use multiple monitors, the HP EliteDesk 800 G3 Tower 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 G3 Tower is better equipped as it comes with 5 SATA slot(s), while the Dell OptiPlex 790 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 HP EliteDesk 800 G3 Tower. Sadly, the Dell OptiPlex 790 SFF 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 790 SFF comes with a decent 240 Watt PSU, but the HP EliteDesk 800 G3 Tower 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

Dell_OptiPlex_790_SFF_motherboard.jpg motherboard layoutHP_EliteDesk_800_G3_Tower_motherboard.jpg motherboard layout