Compare ThinkStation P920 vs ThinkStation P520c Tower vs HP Z2 G5

55 L

25 L

2x FCLGA3647

FCLGA2066

3x Flex bays with optical drive, SATA, I/O, or removable M.2 SSD options + 2x M.2 onboard + 7x via M.2 to PCIe adapter + 6x 3.5" (4 optional, 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 + 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)

5x PCIe 3.0 x16 + 3x PCIe 3.0 x4

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 + 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] 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

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

2.0W internal mono speaker

620 mm / 24.4"

426 mm / 16.77"

356 cm / 14 inch

446 mm / 17.6"

376 mm / 14.8"

385 mm / 15.2 inch

200 mm / 7.87"

175 mm / 6.89"

169 mm / 6.7 inch

37 kg / 81.6 lbs

14.5 kg / 31.96 lbs

From 15.43 lbs

High Definition (HD) Audio, Realtek ALC662 codec

High Definition (HD) Audio, Realtek ALC662 codec

Realtek ALC3205-VA2-CG

Intel C621 chipset

Intel C422 chipset

Intel Q470 (vPro)

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

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

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 Blu-ray Writer

Up to 2x 205W Intel Xeon Scalable CPUs Bronze, Silver, Gold, or Platinum

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

Discrete TPM 2.0, TCG certified

Discrete TPM 2.0, TCG certified

16x DIMMs, up to 1TB DDR4-2666 LRDIMM / DDR4-2933 RDIMM or 512GB DDR4-2666 RDIMM, 12 channels (6 channels per CPU)

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)

DDR4 2666MHz LRDIMM or RDIMM or 2933MHz RDIMM ECC

DDR4 2666MHz or 2933MHz ECC

DDR4 3200MHz

1400 W 80 PLUS Platinum

500W 80 PLUS Platinum or 625W 80 PLUS Platinum

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

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

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

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

2020

2020

2020