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RamCity guarantees 100% that all modules below are compatible with the HP/Compaq Pavilion d Series Desktop d4790y Series (CTO)

Part #. KTH-XW4300/1G • DDR2-667 / PC2-5300 • 1.8V • more info

Buy new: $103.99 $80.99

Part #. ADA • DDR2-533 / PC2-4200 • CL4 • Dual Rank • 1.8V • 16-chip 64x8 • more info

Buy new: $90.99 $70.99

Part #. KTH-XW4200AN/1G • DDR2-533 / PC2-4200 • 1.8V • more info

Buy new: $100.99 $78.99

Part #. AFB • DDR2-667 / PC2-5300 • CL5 • 1.8V • 16-chip 64x8 • more info

Buy new: $90.99 $70.99

Part #. AGT • DDR2-533 / PC2-4200 • CL4 • 1.8V • 8-chip 64x8 • more info

Buy new: $96.99 $75.99

We guarantee your memory upgrade will be 100% compatible, or return it within 1 Whole Year for a full refund.

Need some help installing your upgrade? See our guides and videos.

System Specifications

Comments:

MODULES MAY BE INSTALLED ONE AT A TIME; however, they must be added in like pairs to take advantage of Dual Channel Mode.
This system is configurable and may ship with either DDR2-533 (KTH-XW4200AN/xx) or DDR2-667 (KTH-XW4300/xx).
Both memory types are compatible, however, when mixed they will default to DDR2-533.
If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation).
Models with "-b" are bundled.

Standard Memory:

Maximum Memory:

Expansion:

CPU/Chipset:

Bus Architecture:

Upgrade Path:

Virtually any configuration up to 4GB can be reached using any combination of 512MB and 1GB modules.