The HP/Compaq Business Notebook 6535s uses DDR2 SODIMM PC2-5300 667MHz, PC2-6400 800MHz memory upgrades as listed in the detailed specifications below. All memory and other upgrades compatible with this system are listed on this page.

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Memory Type DDR2 SODIMM PC2-5300 667MHz, PC2-6400 800MHz
Base Memory 512MB (Removable) or 1GB (Removable) or 2GB (Removable)
Upgrade Slots 2 Socket(s)
Maximum Memory 4GB using a 32-bit Operating System 8GB using a 64-bit Operating System
Maximum Module Size 4GB
CPU & Chipset AMD Turion X2 Dual-Core Mobile / AMD M780G AMD Turion X2 Ultra Mobile / AMD M780G
Bus Architecture USB 2.0/3.x Type-A
Notes Important: MODULES MUST BE ORDERED AND INSTALLED IN PAIRS for Dual Channel mode. 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. This system support both DDR2-667 and DDR2-800 SODIMMs. When mixing speeds, the memory will default to the slowest speed populated. Systems with AMD Sempron processors are limited to 4GB maximum.
Manufacturer Part Numbers
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Part Number 63.2C6
667MHz 200pin CL6
In Stock
$4.99
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Part Number 63.5C6
667MHz 200pin CL6
In Stock
$6.99
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Part Number 64.5C6
800MHz 200pin CL6
In Stock
$6.99
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Part Number 63.2C6H
667MHz 200pin CL6
In Stock
$7.99
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Part Number 631C6
667MHz 200pin CL6
In Stock
$7.99
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Part Number 641C6
800MHz 200pin CL6
In Stock
$7.99
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Part Number 63.5C6H
667MHz 200pin CL6
In Stock
$9.99
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Part Number 64.5C6H
800MHz 200pin CL6
In Stock
$9.99
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Part Number 64.2C6
800MHz 200pin CL6
In Stock
$10.99
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Part Number 63.5C6-2
667MHz 200pin CL6
In Stock
$12.99
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Part Number 631C6H
667MHz 200pin CL6
In Stock
$12.99
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Part Number 64.5C6-2
800MHz 200pin CL6
In Stock
$12.99
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Part Number 641C6H
800MHz 200pin CL6
In Stock
$12.99
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Part Number 631C6-2
667MHz 200pin CL6
In Stock
$15.99
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Part Number 632C6
667MHz 200pin CL6
In Stock
$15.99
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Part Number 641C6-2
800MHz 200pin CL6
In Stock
$15.99
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Part Number 642C6
800MHz 200pin CL6
In Stock
$15.99
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Part Number 64.2C6H
800MHz 200pin CL6
In Stock
$17.99
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Part Number 63.5C6-2H
667MHz 200pin CL6
In Stock
$19.99
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Part Number 64.5C6-2H
800MHz 200pin CL6
In Stock
$19.99
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Part Number 631C6-2H
667MHz 200pin CL6
In Stock
$24.99
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Part Number 632C6H
667MHz 200pin CL6
In Stock
$24.99
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Part Number 641C6-2H
800MHz 200pin CL6
In Stock
$24.99
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Part Number 642C6H
800MHz 200pin CL6
In Stock
$24.99
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Part Number 632C6-2
667MHz 200pin CL6
In Stock
$30.99
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Part Number 642C6-2
800MHz 200pin CL6
In Stock
$30.99
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Part Number 632C6-2H
667MHz 200pin CL6
In Stock
$49.99
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Part Number 642C6-2H
800MHz 200pin CL6
In Stock
$49.99
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Part Number 644C6
800MHz 200pin CL6
In Stock
$74.99
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Part Number 634C6
667MHz 200pin CL6
In Stock
$77.99
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Part Number 644C6H
800MHz 200pin CL6
In Stock
$119.99
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Part Number 634C6H
667MHz 200pin CL6
In Stock
$124.99
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Part Number 644C6-2
800MHz 200pin CL6
In Stock
$148.99
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Part Number 634C6-2
667MHz 200pin CL6
In Stock
$154.99
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Part Number 644C6-2H
800MHz 200pin CL6
In Stock
$239.99
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Part Number 634C6-2H
667MHz 200pin CL6
In Stock
$249.99
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Part Number 644C6-2
800MHz 200pin CL6
In Stock
$148.99
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Part Number 634C6-2
667MHz 200pin CL6
In Stock
$154.99
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Part Number 644C6-2H
800MHz 200pin CL6
In Stock
$239.99
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Part Number 634C6-2H
667MHz 200pin CL6
In Stock
$249.99
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Part Number 632C6-2
667MHz 200pin CL6
In Stock
$30.99
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Part Number 642C6-2
800MHz 200pin CL6
In Stock
$30.99
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Part Number 632C6-2H
667MHz 200pin CL6
In Stock
$49.99
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Part Number 642C6-2H
800MHz 200pin CL6
In Stock
$49.99
View Product
Part Number 644C6
800MHz 200pin CL6
In Stock
$74.99
View Product
Part Number 634C6
667MHz 200pin CL6
In Stock
$77.99
View Product
Part Number 644C6H
800MHz 200pin CL6
In Stock
$119.99
View Product
Part Number 634C6H
667MHz 200pin CL6
In Stock
$124.99
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Part Number 631C6-2
667MHz 200pin CL6
In Stock
$15.99
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Part Number 632C6
667MHz 200pin CL6
In Stock
$15.99
View Product
Part Number 641C6-2
800MHz 200pin CL6
In Stock
$15.99
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Part Number 642C6
800MHz 200pin CL6
In Stock
$15.99
View Product
Part Number 631C6-2H
667MHz 200pin CL6
In Stock
$24.99
View Product
Part Number 632C6H
667MHz 200pin CL6
In Stock
$24.99
View Product
Part Number 641C6-2H
800MHz 200pin CL6
In Stock
$24.99
View Product
Part Number 642C6H
800MHz 200pin CL6
In Stock
$24.99
View Product
Part Number 631C6
667MHz 200pin CL6
In Stock
$7.99
View Product
Part Number 641C6
800MHz 200pin CL6
In Stock
$7.99
View Product
Part Number 63.5C6-2
667MHz 200pin CL6
In Stock
$12.99
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Part Number 631C6H
667MHz 200pin CL6
In Stock
$12.99
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Part Number 64.5C6-2
800MHz 200pin CL6
In Stock
$12.99
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Part Number 641C6H
800MHz 200pin CL6
In Stock
$12.99
View Product
Part Number 63.5C6-2H
667MHz 200pin CL6
In Stock
$19.99
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Part Number 64.5C6-2H
800MHz 200pin CL6
In Stock
$19.99
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Part Number 63.5C6
667MHz 200pin CL6
In Stock
$6.99
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Part Number 64.5C6
800MHz 200pin CL6
In Stock
$6.99
View Product
Part Number 63.5C6H
667MHz 200pin CL6
In Stock
$9.99
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Part Number 64.5C6H
800MHz 200pin CL6
In Stock
$9.99
View Product
Part Number 63.2C6
667MHz 200pin CL6
In Stock
$4.99
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Part Number 63.2C6H
667MHz 200pin CL6
In Stock
$7.99
View Product
Part Number 64.2C6
800MHz 200pin CL6
In Stock
$10.99
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Part Number 64.2C6H
800MHz 200pin CL6
In Stock
$17.99
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Upgrade References

The table below are references to other manufacturer part numbers which are specific to this device, have identical specifications to our components. This information is made available for your reference.
Part# Source References
KTH-ZD8000B/1G 1GB DDR2 PC2-5300 667MHz SODIMM Kingston 631C6
KTH-ZD8000B/2G 2GB DDR2 PC2-5300 667MHz SODIMM Kingston 632C6
KTH-ZD8000C6/1G 1GB DDR2 PC2-6400 800MHz SODIMM Kingston 641C6
KTH-ZD8000C6/2G 2GB DDR2 PC2-6400 800MHz SODIMM Kingston 642C6
M51264G60 4GB DDR2 PC2-6400 800MHz SODIMM Kingston 644C6
M51264F50 4GB DDR2 PC2-5300 667MHz SODIMM Kingston 634C6
CT1830546 8GB Kit of 2 4GB DDR2 PC2-6400 800MHz SODIMM Crucial 644C6-2
CT2030266 512GB Kit of 2 256GB Solid State Drive Crucial SSD/256G-2