HP 320 - Notebook PC Maintenance And Service Manual page 11

Compaq 320, 321, 420, 421, 620 and 621 notebook pcs hp 420 and 620 notebook pcs - maintenance and service guide
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Category
Description
39.6-cm (15.6-in) HD LED backlight panel:
Memory
2 customer-accessible/upgradable memory
module slots
Supports dual-channel memory
Supports up to 4 GB of system RAM
PC3-10600, 1333-MHz, DDR3
Supports the following configurations in all
countries and regions:
Hard drives
Supports 9.5-mm, 6.35-cm (2.50-in) hard
drives
Customer-accessible
Serial ATA
1366×768 AntiGlare
1366×768 AntiGlare for webcam
1366×768 BrightView
1366×768 BrightView for Webcam
4096-MB total system memory (4096-
MB × 1)
4096-MB total system memory (2048-
MB× 2, dual-channel)
3072-MB total system memory (2048-
MB + 1024-MB, dual-channel)
2048-MB total system memory (2048-
MB × 1)
2048-MB total system memory (1024-
MB × 2, dual-channel)
1024-MB total system memory (1024-
MB × 1)
UMA
UMA
graphics,
graphics,
GL40 chipset
GM45 chipset
Discrete
graphics,
PM45
chipset
3

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