15td-2728, CPUi7 3rd generation 3632QM, main frequency 2.2G, turbo frequency 3.2G, quad-core and eight threads, 8GB memory, hard disk 1TB, dual graphics card HD7730M/2GB/DDR3 memory +HD4000, 15.6.
17TD-2728, CPUi7 3rd generation 3630QM, main frequency 2.4G, turbo frequency 3.4G, quad-core and eight threads, 8GB memory, hard disk 1TB, dual graphics card GT650M/2GB/GDDR5 memory +HD4000, 17.3.
The three main differences are CPU, graphics card and screen:
The cpu of 14td and 15td are both i7 3632QM, which is lower than i7 3630QM of 17TD.
The only display of 14td is GT640M/2GB/DDR3 memory, the score of 3DMARK 1 is 27025, the only display of 15TD is HD7730 of the same grade as GT640M, and the score of GT650M/GDDR5 of 17td is 35585. The graphics card determines the fluency of the game by 80%, so the GT650M can kill most large 3d games, while the GT640M/HD7730M is much worse!
14td is a 14 inch high-resolution screen with a resolution of1600x900; 15td is 15.6-inch high-resolution screen with resolution of1920x1080; 17td is 1920X 1080 17.3 inch high-resolution screen.
It can be seen that 17TD-2728 is more cost-effective than 14TD-2728 and 15TD-2728, especially for users who want to experience high-speed 3d games.
It's all configured by Dell official website. Dell is a direct selling model, which is the same price for other channels, and there will be no discount! The low prices of other channels are often orders from big distributors such as JD.COM, Gome, Suning and users in certain industries. The low price of these ordering machines is generally the low price obtained by slimming. For example, the third-generation i7 is slimmed down to the second-generation i7, the GDDR5 memory of GT650M is slimmed down to DDR3, and even directly slimmed down to GT640M/HD7730M! Be sure to ask when you buy it!
Even in Dell official website, pay attention. A customer on the Internet complained that the keyboard of official website logo had backlight, but she received it without backlight. Dell officially said that there is a backlit keyboard on the Internet, but you didn't explicitly want a backlit keyboard when you ordered it ...! Be sure to confirm every accessory and record it. You know!
Since Dell introduced the special notebook for aliens, the graphics card configuration of other notebooks is not high. Even if i5 is equipped with GT640M and i7 is equipped with GT650M, it is still DDR3 memory. Only TD series can be equipped with GDDR5 memory. But the price has also gone up a lot.
For your reference.