Compare ThinkStation P520c Tower vs HP Z2 G5 vs HP Z6 G4

25 L

FCLGA2066

2x Optical drives / 1x optical drive + 2x 3.5" SATA / 2x M.2 SSD removable drive enclosures / other I/O ports + 2x M.2 onboard + 3x via M.2 to PCIe adapter + 4x 3.5" (2 via Flex bay)

3x M.2 + 1x PCIe 3.0 x16 + 2x PCIe 3.0 x1 + 1x PCIe 3.0 x4 (x16 slot)

2x M.2 PCIe 3.0 x4 + 1x PCIe 3.0 x16

2x PCIe 3.0 x16 + 1x PCIe 3.0 x8 + 1x PCIe 3.0 x4

[Front] 4x USB 3.1 Gen1 + 2x USB 2.0 + 2x PS/2 + 1x RJ45 (1Gbps) + 1x Microphone + 1x Line-in + 1x Line-out + 2x optional USB-C 3.1 Gen2 + 1x optional Thunderbolt 3 + 1x serial | [Rear] 2x USB-C 3.1 Gen1 + 1x Headphone + 1x Microphone + 1x SD card reader

[Front] 2x USB 2.0 + 2x USB 3.2 Gen2 + 2x USB 3.2 Gen1 + 1x DisplayPort 1.4 + 2x Audio + 1x RJ45 | [Rear] 2x USB 3.2 Gen1 + 2x USB 3.2 Gen2 + 5-in-1 SD card reader + 1x Audio combo

[Front] 2x Audio + 2x PS/2 + 1x Serial + 2x RJ-45 1Gb + 6x USB 3.1 Gen1 | [Rear] 1x Headphone + 4x USB 3.1 Gen1

WiFi 5 + Bluetooth 4.2 / none

WiFi 6 + Bluetooth 5

Black

ATX desktop computer

ATX desktop computer

EATX desktop computer

2.0W internal mono speaker

426 mm / 16.77"

356 cm / 14 inch

18.3 inch

376 mm / 14.8"

385 mm / 15.2 inch

17.5 inch

175 mm / 6.89"

169 mm / 6.7 inch

6.65 inch

14.5 kg / 31.96 lbs

From 15.43 lbs

From 29 lbs

High Definition (HD) Audio, Realtek ALC662 codec

Realtek ALC3205-VA2-CG

Intel C422 chipset

Intel Q470 (vPro)

Intel C622

NVIDIA NVS 810 4GB DDR3 or Quadro P400 2GB GDDR5, P600 2GB GDDR5, P620 2GB GDDR5, P1000 4GB GDDR5, P2000 5GB GDDR5, P2200 5GB GDDR5, P4000 8GB GDDR5, P5000 16GB GDDR5X, RTX 4000 8GB GDDR6, or RTX 5000 16GB GDDR6

AMD Radeon Pro WX 3200 4GB, W5500 8GB, or W5700 8GB or NVIDIA Quadro P400 2GB, P620 2GB, P1000 4GB, P2200 5GB, RTX 4000 8GB, RTX 5000 16GB, or RTX 6000 24GB

AMD Radeon Pro WX 3100 4GB, WX 3200 4GB, W5500 8GB, W5700 8GB, WX 7100 8GB, or WX 9100 16GB or NVIDIA Quadro P400 2GB, P620 2GB, P1000 4GB, P2200 5GB, RTX 4000 8GB, RTX 5000 16GB, or RTX 6000 24GB

Optional PCIe dual Gb or dual 10Gb Networking

Windows 10 Pro, Ubuntu, or none

Windows 10 Pro

Windows 10 Pro

10⁰ C to 35⁰ C

Optional 9mm optical drive (DVD-ROM, DVD±RW, or Blu-ray)

Optional DVD-ROM, DVD-RW, or Blu-ray Writer + Optional 2nd Blu-ray Writer

Optional DVD-ROM, DVD-RW, or Blu-ray Writer + Optional 2nd DVD Writer or Blu-ray Writer

Intel Xeon W-2100 or W-2200 series processors (up to Xeon W-2195)

From Intel Core i3-10100 to Core i9-10850K or From Xeon W-1250P to Xeon W-1290P

Intel Xeon Bronze, Silver, or Gold processor up to Xeon Gold 6258R

Discrete TPM 2.0, TCG certified

HP Solenoid Lock/Hood Sensor (TWR), Convert TPM to 1.2

4x UDIMMs, up to 128GB DDR4-2666 w/ Xeon W-2100 series or up to 256GB DDR4-2933 w/ Xeon W-2200 series

Up to 128 GB with ECC (4x DIMMs)

Up to 768 GB with ECC (12x DIMMs)

DDR4 2666MHz or 2933MHz ECC

DDR4 3200MHz

DDR4 2666MHz or 2933MHz

500W 80 PLUS Platinum or 625W 80 PLUS Platinum

350W Platinum (92%), 500W Gold (90%), or 700W Platinum (92%)

1000 W

Up to 5x M.2 PCIe SSD + 4x SATA

3x M.2 + 1x 2.5" HDD + 2x 3.5" HDD bays

Up to 256GB NVDIMM + 4x PCIe SSD + 2x M.2 SSD + 4x 3.5" HDD + Removable internal storage

2020

2020

2020