Compaq 320, 321, 420, 421, 620 and 621 Notebook PC and HP 420 and 620 Notebook PC

Category Description UMA
graphics,
GL40 chipset
UMA
graphics,
GM45 chipset
Discrete
graphics,
PM45
chipset
35.6-cm (14.0-in) HD LED backlight panel:
●
1366×768 AntiGlare
●
1366×768 AntiGlare for webcam
●
1366×768 BrightView
●
1366×768 BrightView for Webcam
√√ √
39.6-cm (15.6-in) HD LED backlight panel:
●
1366×768 AntiGlare
●
1366×768 AntiGlare for webcam
●
1366×768 BrightView
●
1366×768 BrightView for Webcam
√√ √
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:
●
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)
√√ √
Hard drives Supports 7.0 and 9.5-mm, 6.35-cm (2.50-in)
hard drives
√√ √
Customer-accessible √√ √
Serial ATA √√ √
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