The Dell Inspiron 15 (3521) uses DDR3 SODIMM PC3-12800 1600MHz 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 DDR3 SODIMM PC3-12800 1600MHz
Base Memory 2GB (Removable) or 4GB (Removable) or 6GB (Removable)
Upgrade Slots 2 Socket(s)
Maximum Memory 8GB
Maximum Module Size 4GB
CPU & Chipset Intel Celeron Dual Core / Intel HM76 Intel Core i3 / Intel HM76 Intel Core i5 / Intel HM76 Intel Core i7 / Intel HM76 Intel Pentium Dual Core / Intel HM76
Bus Architecture Flash - SDHC; Flash - SDXC; Flash - Secure Digital; SSD - SATA 2.5-inch 9.5mm; USB 2.0/3.x Type-A
Notes Important: MODULES MUST BE ORDERED AND INSTALLED IN PAIRS for Dual Channel mode.
Manufacturer Part Numbers
  • N/A
Part Number 732C9
1600MHz 204pin CL9
In Stock
$18.99
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Part Number 734C9
1600MHz 204pin CL9
In Stock
$23.99
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Part Number 732C9H
1600MHz 204pin CL9
In Stock
$29.99
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Part Number 734C9H
1600MHz 204pin CL9
In Stock
$37.99
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Part Number 734C9-2
1600MHz 204pin CL9
In Stock
$46.99
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Part Number 734LVC9
1600MHz 204pin CL9 Low Power
In Stock
$52.99
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Part Number 744LVC10
1866MHz 204pin CL10 Low Power
In Stock
$61.99
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Part Number 744LVC9
1866MHz 204pin CL9 Low Power
In Stock
$61.99
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Part Number 734C9-2H
1600MHz 204pin CL9
In Stock
$74.99
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Part Number 734LVC9H
1600MHz 204pin CL9 Low Power
In Stock
$84.99
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Part Number SSD/60G
Call to Order
$92.99
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Part Number 744LVC10H
1866MHz 204pin CL10 Low Power
In Stock
$99.99
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Part Number 744LVC9H
1866MHz 204pin CL9 Low Power
In Stock
$99.99
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Part Number 744C9-2
1866MHz 204pin CL9
Call to Order
$102.99
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Part Number 734LVC9-2
1600MHz 204pin CL9 Low Power
In Stock
$105.99
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Part Number 744LVC10-2
1866MHz 204pin CL10 Low Power
In Stock
$123.99
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Part Number 744LVC9-2
1866MHz 204pin CL9 Low Power
In Stock
$123.99
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Part Number SSD/80G
Call to Order
$123.99
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Part Number SSD/60GH
Call to Order
$149.99
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Part Number 744C9-2H
1866MHz 204pin CL9
Call to Order
$164.99
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Part Number 734LVC9-2H
1600MHz 204pin CL9 Low Power
In Stock
$169.99
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Part Number 744LVC10-2H
1866MHz 204pin CL10 Low Power
In Stock
$199.99
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Part Number 744LVC9-2H
1866MHz 204pin CL9 Low Power
In Stock
$199.99
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Part Number SSD/80GH
Call to Order
$199.99
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Part Number 734C9-2
1600MHz 204pin CL9
In Stock
$46.99
View Product
Part Number 734C9-2H
1600MHz 204pin CL9
In Stock
$74.99
View Product
Part Number 744C9-2
1866MHz 204pin CL9
Call to Order
$102.99
View Product
Part Number 734LVC9-2
1600MHz 204pin CL9 Low Power
In Stock
$105.99
View Product
Part Number 744LVC10-2
1866MHz 204pin CL10 Low Power
In Stock
$123.99
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Part Number 744LVC9-2
1866MHz 204pin CL9 Low Power
In Stock
$123.99
View Product
Part Number 744C9-2H
1866MHz 204pin CL9
Call to Order
$164.99
View Product
Part Number 734LVC9-2H
1600MHz 204pin CL9 Low Power
In Stock
$169.99
View Product
Part Number 744LVC10-2H
1866MHz 204pin CL10 Low Power
In Stock
$199.99
View Product
Part Number 744LVC9-2H
1866MHz 204pin CL9 Low Power
In Stock
$199.99
View Product
Part Number 734C9
1600MHz 204pin CL9
In Stock
$23.99
View Product
Part Number 734C9H
1600MHz 204pin CL9
In Stock
$37.99
View Product
Part Number 734LVC9
1600MHz 204pin CL9 Low Power
In Stock
$52.99
View Product
Part Number 744LVC10
1866MHz 204pin CL10 Low Power
In Stock
$61.99
View Product
Part Number 744LVC9
1866MHz 204pin CL9 Low Power
In Stock
$61.99
View Product
Part Number 734LVC9H
1600MHz 204pin CL9 Low Power
In Stock
$84.99
View Product
Part Number 744LVC10H
1866MHz 204pin CL10 Low Power
In Stock
$99.99
View Product
Part Number 744LVC9H
1866MHz 204pin CL9 Low Power
In Stock
$99.99
View Product
Part Number 732C9
1600MHz 204pin CL9
In Stock
$18.99
View Product
Part Number 732C9H
1600MHz 204pin CL9
In Stock
$29.99
View Product

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
KTD-L3C/4G 4GB DDR3 PC3-12800 1600MHz SODIMM Kingston 734C9
KTD-L3CS/4G 4GB DDR3 PC3-12800 1600MHz SODIMM Kingston 734C9
KTD-L3C/2G 2GB DDR3 PC3-12800 1600MHz SODIMM Kingston 732C9
SVP200S37A/60G 60GB Solid State Drive Kingston SSD/60G
SVP200S3B7A/60G 60GB Kit of 2 30GB Solid State Drive Kingston SSD/30G-2
SV300S37A/60G 60GB Solid State Drive Kingston SSD/60G
SH103S3/480G 80GB Solid State Drive Kingston SSD/80G
SH103S3B/480G 480GB Kit of 2 240GB Solid State Drive Kingston SSD/240G-2
SKC300S37A/480G 80GB Solid State Drive Kingston SSD/80G
KTD-L3CL/4G 4GB DDR3 PC3-12800 1600MHz Low Power SODIMM Kingston 734LVC9
KHX1866C11S3P1K2/8G 8GB Kit of 2 4GB DDR3 PC3-14900 1866MHz SODIMM Kingston 744C9-2
KHX18LS11P1K2/8 8GB Kit of 2 4GB DDR3 PC3-14900 1866MHz Low Power SODIMM Kingston 744LVC9-2
KHX16S9P1/4 4GB DDR3 PC3-12800 1600MHz SODIMM Kingston 734C9
KHX1600C9S3P1K2/8G 8GB Kit of 2 4GB DDR3 PC3-12800 1600MHz SODIMM Kingston 734C9-2
SKC300S3B7A/480G 480GB Kit of 2 240GB Solid State Drive Kingston SSD/240G-2
SV300S3D7/480G 480GB Kit of 2 240GB Solid State Drive Kingston SSD/240G-2
HX318LS10IBK2/8 8GB Kit of 2 4GB DDR3 PC3-14900 1866MHz Low Power SODIMM Kingston 744LVC10-2
HX316LS9IB/4 4GB DDR3 PC3-12800 1600MHz Low Power SODIMM Kingston 734LVC9
HX316LS9IBK2/8 8GB Kit of 2 4GB DDR3 PC3-12800 1600MHz Low Power SODIMM Kingston 734LVC9-2
SV310S3B7A/960G 960GB SSDNow V310 SATA 3 2.5 (7mm height) Upgrade Bundle Kit w/Adapter Bundle Kit,SATA3 (6Gbps),V310 Series, SSD 2.5-inch 7mm Kingston
HX318LS10IB/4 4GB DDR3 PC3-14900 1866MHz Low Power SODIMM Kingston 744LVC10
SV310S3D7/960G 960GB SSDNow V310 SATA 3 2.5 (7mm height) Desktop Bundle Kit Desktop Bundle Kit,SATA3 (6Gbps),V310 Series, SSD 2.5-inch 7mm Kingston
SV310S3N7A/960G 960GB SSDNow V310 SATA 3 2.5 (7mm height) Notebook Bundle Kit w/Adp Notebook Bundle Kit,SATA3 (6Gbps),V310 Series, SSD 2.5-inch 7mm Kingston
HX318LS11IB/4 4GB DDR3 PC3-14900 1866MHz Low Power SODIMM Kingston 744LVC9
HX318LS11IBK2/8 8GB Kit of 2 4GB DDR3 PC3-14900 1866MHz Low Power SODIMM Kingston 744LVC9-2
SHSS3B7A/960G 960GB HyperX SAVAGE SSD SATA 3 2.5 Bundle Kit Bundle Kit,HyperX Savage,SATA3 (6Gbps), SSD 2.5-inch 7mm Kingston
SKC310S3B7A/960G 960GB SSDNow KC310 SSD SATA 3 2.5 (7mm height) Upgrade Bundle Kit Bundle Kit,KC310 Series,SATA3 (6Gbps), SSD 2.5-inch 7mm Kingston
SKC310S37A/960G 60GB Solid State Drive Kingston SSD/60G