HP ProDesk 400 G6 SFF vs. HP ProDesk 490 G2 Microtower

Comparison and Differences

HP_ProDesk_400_G6_SFF.jpg case front and back pannelHP_ProDesk_490_G2_Microtower.jpg case front and back pannel
Model
Form factorSmallMini Tower
CPU optionsIntel Gen8&9 i3/i5/i7; Celeron; Pentium;Intel Gen4 i3/i5/i7; Celeron; Pentium;
ChipsetB360H81
Dedicated GPU *GeForce GT 1030 Low ProfileGeForce GTX 1660 Super
RAMDIMM DDR4-2666DIMM DDR3-1600
RAM slots24
RAM speed2666 MT/s1600 MT/s
RAM max64 GB32 GB
USB ports(4x)USB-A 3.0; (4x)USB-A 2.0; (4x)USB-A 3.0; (4x)USB-A 2.0;
Video portsDisplayPort; VGA;VGA; DVI-D;
Other portsRJ45; Headset; Line-In; Line-Out;RJ45; Hdph; Mic; Line-Out; Line-In; Serial; (2x) PS2;
Optional portsSD card reader; Serial; Serial and (2x) PS2; DP/HDMI/VGA/USB-C;SD card reader; Serial; Parallel; DisplayPort
SATA ports23
PCI slotsPCIe 3.0 x16; PCIe 3.0 x1 ;PCIe x16; (2x) PCIe x1; PCIe x16 (wired x4);
M.2 slotsM.2 2280/2230 M-key (PCIe x4); M.2 2230 (WiFi/BT) N.A.
Drive bays(2x) 2.5/3.5in; 5.25in (slim);(2x) 3.5in; 5.25in (slim)
PSU180 W180/300 W
Weight4.6 kg (10.14 lb)6.5 kg (14.3 lb)
Released20192014
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 HP ProDesk 400 G6 SFF and HP ProDesk 490 G2 Microtower

If you are looking for a more modern desktop, then you should go with the HP ProDesk 400 G6 SFF which was released in 2019. The HP ProDesk 490 G2 Microtower is older and entered production in 2014.

If you are looking for the smaller form factor the HP ProDesk 400 G6 SFF is the right one for you. It is smaller than the HP ProDesk 490 G2 Microtower 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 ProDesk 400 G6 SFF as it is running a newer generation CPU. This is not to say that HP ProDesk 490 G2 Microtower is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

The HP ProDesk 490 G2 Microtower has 4 RAM slots while the HP ProDesk 400 G6 SFF 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 HP ProDesk 400 G6 SFF is using the faster 2666 MT/s RAM. The HP ProDesk 490 G2 Microtower 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 HP ProDesk 400 G6 SFF as it has the ability to run 64 GB of RAM. The HP ProDesk 490 G2 Microtower can do a bit less at max 32 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 8. 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.

Unfortunately, only the HP ProDesk 400 G6 SFF has a DisplayPort. The HP ProDesk 490 G2 Microtower does not have one? Don't worry though, nowadays video adapters are cheap and you can get almost any combination of conversion types.

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 ProDesk 490 G2 Microtower is better equipped as it comes with 3 SATA slot(s), while the HP ProDesk 400 G6 SFF has 2 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 ProDesk 400 G6 SFF. Sadly, the HP ProDesk 490 G2 Microtower 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 HP ProDesk 400 G6 SFF comes with a decent 180 Watt PSU, but the HP ProDesk 490 G2 Microtower has a more powerful one rated at 300 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

HP_ProDesk_400_G6_SFF_motherboard.jpg motherboard layoutHP_ProDesk_490_G2_Microtower_motherboard.jpg motherboard layout