(claimed to be 9hours) and a sleek aluminium unibody shell. XPS 15 XPS 15 (L501X/L502X, October 2010) The XPS 15 was released in October 2010 and is a 15.6-inch laptop. Its base-price at release is $849 and it can be customized up to the Intel Core i7. It is equipped with a 2010 NVIDIA GT 435M or 420M video card, and can be customized with up to 8 GiB of DDR3 memory. This made it a good gaming laptop for its time. The base model comes with 500 GB 7200 rpm SATA hard drive, but options include a 640 GB 7200 RPM SATA hard drive, or a 256 GiB SSD. It also contains a 16x DVD/Blu-ray reader/burner, and a 9-in-1 media card reader. The screen resolution is either 1366×768 or 1920×1080. The Nvidia graphics card used in Dell 15 (L501x) turns off or on automatically for specific applications demanding dedicated graphics. It has integrated JBL 2.1 Speakers + Waves MaxxAudio enhancement. It is equipped with 2 MP webcam. It has two USB 3.0 ports and one eSATAp port. The following year the XPS 15 (L502x) had both its processor and graphics card upgraded, with the processor being upgraded from the Arrandale to the Sandy Bridge chipset and the graphics upgraded to either a Nvidia 525M or 540M with 1 or 2 GiB of RAM respectively. XPS 15 (L521X, Summer 2012) The Dell XPS 15 L521X was first released in Summer 2012. Includes a 15.6-inch screen (1920x1080 Corning Gorilla Glass FHD WLED with TrueLife) and was much thinner than its predecessor. Its design was similar to Dell XPS 13 L321X and Dell XPS 14 L421X: the edges are rounded and the bottom is made of carbon fiber, with a gentle silicone surface treatment. It features Intel HM77 Express Chipset with Intel Core i5/i7 (3rd generation, up to i7-3632QM) CPU, from 4 to 16 GiB replaceable DDR3 memory (2 slots), GeForce GT630M / GT640M with 1 GiB / 2 GiB of GDDR5 and one mSATA mini card slot paired with classic 2.5 inch SATA slot. XPS 15 (9530, October 2013) The Dell XPS 15 Touch Screen laptop (9530, using Haswell) was first released in October 2013, is a high-end notebook. It was the fourth generation XPS 15, which has taken many of the design elements of the Ivy Bridge Edition XPS 15 but fixes the cooling/throttling, adds a Haswell CPU and an