Intel Core Processor Suffixes are a series of letters and numbers that indicate specific features and capabilities of Intel Core processors, such as clock speed, power consumption, graphics performance, and more

SuffixMeaning
G1-G7Graphics level (processors with new integrated graphics technology only)
EEmbedded
FRequires discrete graphics
GIncludes discrete graphics on package
HHigh performance optimized for mobile
HKHigh performance optimized for mobile, unlocked
HQHigh performance optimized for mobile, quad core
KUnlocked
SSpecial edition
TPower-optimized lifestyle
UMobile power efficient
YMobile extremely low power
X/XEUnlocked, High End

Reference