Compare ThinkStation P520c Tower vs ThinkStation P720 vs HP Z4 G4

25 L

36 L

FCLGA2066

2x FCLGA3647

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)

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 + 7x via M.2 to PCIe adapter + 6x 3.5" (4 optional, 2 via Flex bay)

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

3x PCIe 3.0 x16 + 1x PCIe 3.0 x8 + 1x PCIe 3.0 x4 + 1x PCI

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

[Front] 2x Audio + 2x PS/2 + 1x Serial + 2x RJ-45 1Gb + 6x USB 3.1 Gen1 | [Rear] 1x Headphone + 2x USB-C 3.1 Gen2 + 2x USB 3.1 Gen1

WiFi 5 + Bluetooth 4.2 / none

WiFi 5 + Bluetooth 4.2 / none

WiFi 6 + Bluetooth 5

Black

Black

ATX desktop computer

ATX desktop computer

ATX desktop computer

426 mm / 16.77"

485 mm / 19.1"

386 cm / 15.2 inch

376 mm / 14.8"

446 mm / 17.6"

445 mm / 17.5 inch

175 mm / 6.89"

175 mm / 6.89"

169 mm / 6.65 inch

14.5 kg / 31.96 lbs

25.7 kg / 56.7 lbs

From 22.4 lbs / 10.2 kg

High Definition (HD) Audio, Realtek ALC662 codec

High Definition (HD) Audio, Realtek ALC662 codec

Intel C422 chipset

Intel C621 chipset

Intel C422 or X299

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

NVIDIA NVS 810 4GB DDR3 / Quadro P400 2GB GDDR5 to P6000 24GB GDDR5X / RTX 4000 8GB GDDR6 to RTX 8000 48GB GDDR6 / GP100 16GB HBM2 / GV100 32GB HBM26

AMD Radeon Pro WX 3100 4GB, WX 3200 4GB, W 5500 8GB, W 5700 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, RTX 6000 24GB, RTX 8000 48GB, or GV100 32GB

Optional PCIe dual Gb or dual 10Gb Networking

Windows 10 Pro, Ubuntu, or none

Windows 10 Pro, Ubuntu, or none

Windows 10 Pro

10⁰ C to 35⁰ C

10⁰ C to 35⁰ C

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

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

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)

Up to 2x 165W Intel Xeon Scalable CPUs Bronze, Silver, Gold, or Platinum

Intel Core i9-10900X, i9-10920X, i9-10940X, or i9-10980XE or Intel Xeon W-2123, W-2223, W-2125, W-2225, W-2235, W-2133, W-2245, W-2255, W-2265, W-2275, or W-2295

Discrete TPM 2.0, TCG certified

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

12x DIMMs, up to 768GB DDR4-2933 or 384GB DDR4-2666, 12 channels (6 channels per CPU)

Up to 512 GB with ECC (8x DIMMs)

DDR4 2666MHz or 2933MHz ECC

DDR4 2666MHz or 2933MHz ECC

DDR4 2666MHz or 2933MHz

500W 80 PLUS Platinum or 625W 80 PLUS Platinum

690 / 900 / 1000 W 80 PLUS Platinum

465W, 750W, or 1000W

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

Up to 9x M.2 PCIe SSD + 6x 3.5" / 10x 2.5" SATA HDD

Up to 480GB Intel Optane PCIe SSD + 4x PCIe internal storage + 2x M.2 storage + 4x 3.5" HDD/SSD + Removable internal storage

2020

2020

2020