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RamCity guarantees 100% that all modules below are compatible with the HP/Compaq Pavilion a1000 Series Desktop a1635.it

RamCity 2GB CL4 240-pin DIMM

Part #. AMF • DDR2-533 / PC2-4200 • CL4 • 1.8V • 16-chip 128x8 • more info

Buy new: $105.99 $82.99

7 in Stock Free Shipping Guaranteed Compatible

RamCity 2GB CL5 240-pin DIMM

Part #. APM • DDR2-667 / PC2-5300 • CL5 • 1.8V • 16-chip 128x8 • more info

Buy new: $109.99 $85.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston 2GB 240-pin DIMM

Part #. KTH-XW4300/2G • DDR2-667 / PC2-5300 • 1.8V • more info

Buy new: $126.99 $98.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston 2GB 240-pin DIMM

Part #. KTH-XW4200AN/2G • DDR2-533 / PC2-4200 • 1.8V • more info

Buy new: $126.99 $98.99

Ships in 7 Days Free Shipping Guaranteed Compatible

RamCity 1GB CL4 240-pin DIMM

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

Buy new: $92.99 $72.99

1 in Stock Free Shipping Guaranteed Compatible

Kingston 1GB 240-pin DIMM

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

Buy new: $96.99 $75.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston 1GB 240-pin DIMM

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

Buy new: $96.99 $75.99

28 in Stock Free Shipping Guaranteed Compatible

RamCity 1GB CL5 240-pin DIMM

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

Buy new: $91.99 $71.99

12 in Stock Free Shipping Guaranteed Compatible

RamCity 512MB CL4 240-pin DIMM

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

Buy new: $103.99 $80.99

Ships in 7 Days Free Shipping Guaranteed Compatible

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).
Maximum configurations require a 64-bit operating system.
Models with "-b" are bundled.

Standard Memory:

256MB (Removable) or
512MB (Removable) or
1GB (Removable) or
2GB (Removable)

Maximum Memory:

Expansion:

4 Sockets

CPU/Chipset:

Intel Core 2 Duo 1.86 GHz Intel P965

Bus Architecture:

PCI; PCI Express; SSD - SATA 2.5-inch; USB

Mfr's System P/N's:

RP855AA

Upgrade Path:

Virtually any configuration up to 8GB can be reached using any combination of 512MB, 1, and 2GB modules.

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RamCity guarantees 100% that all modules below are compatible with the HP/Compaq Pavilion a1000 Series Desktop a1635.it