Product comparison · 2 pcs/workstations

HP 620 + ZR2740w vs HP 820 + ZR2740w

Key differences

Differences highlightedShow differences only

Comparison of 620 + ZR2740w, 820 + ZR2740w
138 specifications	A HP 620 + ZR2740w View product	B HP 820 + ZR2740w View product
Memory2 differ
Memory slotsDiffers	12x DIMM	16x DIMM
Memory clock speedDiffers	1600 MHz	1866 MHz
Storageidentical
Card reader integratedKnown for one	Unknown — not stated by the source	Yes
Total HDDs capacityKnown for one	1 TB	Unknown — not stated by the source
Ports & interfaces1 differ
Line-outKnown for one	Unknown — not stated by the source	Yes
Line-inKnown for one	Unknown — not stated by the source	Yes
PS/2 ports quantityDiffers	0	2
Expansion slots2 differ
Number of 3.5" baysDiffers	3	4
PCI Express x4 (Gen 3.x) slotsKnown for one	Unknown — not stated by the source	1
PCI Express x16 (Gen 3.x) slotsDiffers	2	3
PCI Express x8 (Gen 2.x) slotsKnown for one	1	Unknown — not stated by the source
Power1 differ
Power supplyDiffers	800 W	1125 W
Processor special featuresidentical
Intel® Rapid Start TechnologyKnown for one	No	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	171.5 mm	203 mm
DepthDiffers	464.8 mm	525 mm
HeightDiffers	444.5 mm	444 mm
WeightDiffers	15.5 kg	19.5 kg

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.