&lt;ul&gt; 
&lt;li&gt; Model / Board P/N: Inspiron 3521 / 5521 series, i7 motherboard variant &lt;/li&gt;  
&lt;li&gt; Processor Support: Intel Core i7 (3rd Gen, U-series, depending on model) &lt;/li&gt; 
&lt;li&gt; Memory Support: DDR3 / DDR3L SO-DIMM RAM (dual slot) &lt;/li&gt;   
&lt;li&gt; Graphics: Integrated Intel HD Graphics &lt;/li&gt; 
&lt;li&gt; Storage Interface: SATA for HDD / SSD — standard 2.5″ drive support &lt;/li&gt;   
&lt;li&gt; Compatibility: Designed for Dell Inspiron 15 3521 / 5521 chassis &lt;/li&gt; 
&lt;/ul&gt;  