Page 8 from comparison Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

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Compare Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tbwith Msi Pulse Gl66 12Ugkv Core I7 11800H Rtx 3070 16Gb 512Gb

Feature

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Msi Pulse Gl66 12Ugkv Core I7 11800H Rtx 3070 16Gb 512Gb

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 23.9 * 259 * 359 millimeter (mm)
Product Weight 1.7 kilogram (kg) 2.25 kilogram (kg)
CPU
CPU Generation
Processor Operating Frequency
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography 11th series Core i7 processors / 8 cores / 16 threads / 10nm lithography
Dedicated Graphics Processor Specs
Integrated Graphics with Processor
Dedicated Graphics Memory 2GB GDDR6 type 8GB GDDR6 type
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb)
Storage Type
Internal Memory Details NVMe SSD
Display Size 15.6 inch 15.6 inch
Panel Technology
Display Resolution FHD - 1920×1080 FHD - 1920×1080
Refresh Rate 60 hertz (hz) 144 hertz (hz)
Display Panel Coating Type Matte Matte
Touchscreen Capability false false
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity 4-cell battery with 53 Wh capacity
Optical Drive false false
Webcam true true
Webcam Details
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true false
Speaker Type Internal Dolby Audio speakers 2 speakers with a total power of 4W
GPU Details -
Wireless Communication Details -
USB Type C Port Details - 1x USB 3.2 Gen 1 port
Charger Type -

Compare Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tbwith Msi Thin Gf63 12Ucx Core I5 12450H Rtx 2050 8Gb 1Tb

Feature

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Msi Thin Gf63 12Ucx Core I5 12450H Rtx 2050 8Gb 1Tb

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 21.7 * 254 * 359 millimeter (mm)
Product Weight 1.7 kilogram (kg) 1.86 kilogram (kg)
CPU
CPU Generation
Processor Operating Frequency
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography 12th Gen Core i5 processors / 8 cores / 12 threads / 10nm lithography
Dedicated Graphics Processor Specs
Integrated Graphics with Processor
Dedicated Graphics Memory 2GB GDDR6 type 4GB GDDR6 64-bit
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb) 1 terabyte (tb)
Storage Type
Internal Memory Details -
Display Size 15.6 inch 15.6 inch
Panel Technology
Display Resolution FHD - 1920×1080 FHD - 1920×1080
Refresh Rate 60 hertz (hz) 144 hertz (hz)
Display Panel Coating Type Matte Matte
Touchscreen Capability false false
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity 3-cell battery with 52.5 Wh capacity
Optical Drive false false
Webcam true true
Webcam Details
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true false
Speaker Type Internal Dolby Audio speakers Internal stereo speakers
Wireless Communication Details -

Compare Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tbwith Msi Katana Gf66 Core I7 12700H Rtx 3050 16Gb 512Gb

Feature

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Msi Katana Gf66 Core I7 12700H Rtx 3050 16Gb 512Gb

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 24.9 * 259 * 359 millimeter (mm)
Product Weight 1.7 kilogram (kg) 2.25 kilogram (kg)
CPU
CPU Generation
Processor Operating Frequency
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography 12th Gen Core i7 processors / 14 cores / 20 threads / 10nm lithography
Dedicated Graphics Processor Specs
Integrated Graphics with Processor
Dedicated Graphics Memory 2GB GDDR6 type 4GB GDDR6 type
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb) 1 terabyte (tb)
Storage Type
Internal Memory Details PCIe NVMe SSD
Display Size 15.6 inch 15.6 inch
Panel Technology
Display Resolution FHD - 1920×1080 FHD - 1920×1080
Refresh Rate 60 hertz (hz) 144 hertz (hz)
Display Panel Coating Type Matte -
Touchscreen Capability false false
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity 53.5Wh 3-Cell Battery
Optical Drive false false
Webcam true true
Webcam Details
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true false
Speaker Type Internal Dolby Audio speakers 2 x 2W internal speakers
Wireless Communication Details -
USB Type C Port Details - 1x USB 3.2 Gen 1 Type-C port
Charger Type -

Compare Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tbwith Msi Modern 14 C12M Core I5 1235U Iris Xe 8Gb 512Gb

Feature

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Msi Modern 14 C12M Core I5 1235U Iris Xe 8Gb 512Gb

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 19.35 * 223 * 319.9 millimeter (mm)
Product Weight 1.7 kilogram (kg) 1.4 kilogram (kg)
CPU
CPU Generation
Processor Operating Frequency
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography
Dedicated Graphics Processor Specs -
Integrated Graphics with Processor
Dedicated Graphics Memory 2GB GDDR6 type -
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb)
Storage Type
Internal Memory Details -
Display Size 15.6 inch 14 inch
Panel Technology
Display Resolution FHD - 1920×1080 FHD - 1920×1080
Refresh Rate 60 hertz (hz) 60 hertz (hz)
Display Panel Coating Type Matte Matte
Touchscreen Capability false -
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity 3-cell battery with 53 Wh capacity
Optical Drive false false
Webcam true true
Webcam Details -
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true true
Speaker Type Internal Dolby Audio speakers Internal stereo speakers

Compare Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tbwith Msi Pulse Gl66 12Ugok Core I7 12700H Rtx 3070 16Gb 1Tb Qhd

Feature

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Msi Pulse Gl66 12Ugok Core I7 12700H Rtx 3070 16Gb 1Tb Qhd

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 23.9 * 259 * 359 millimeter (mm)
Product Weight 1.7 kilogram (kg) 2.25 kilogram (kg)
CPU
CPU Generation
Processor Operating Frequency
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography 11th series Core i7 processors / 14 cores / 20 threads / 10nm lithography
Dedicated Graphics Processor Specs
Integrated Graphics with Processor
Dedicated Graphics Memory 2GB GDDR6 type 8GB GDDR6 type
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb) 1 terabyte (tb)
Storage Type
Internal Memory Details NVMe SSD
Display Size 15.6 inch 15.6 inch
Panel Technology
Display Resolution FHD - 1920×1080 QHD - 2560×1440
Refresh Rate 60 hertz (hz) 165 hertz (hz)
Display Panel Coating Type Matte -
Touchscreen Capability false false
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity 4-cell battery with 90 Wh capacity
Optical Drive false false
Webcam true true
Webcam Details
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true false
Speaker Type Internal Dolby Audio speakers 2 speakers with a total power of 4W
GPU Details -
Wireless Communication Details -
USB Type C Port Details - 1x USB 3.2 Gen 1 port
Charger Type -

Compare Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tbwith Msi Pulse Gl66 Core I7 11800H Rtx 3060 16Gb 1Tb

Feature

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Msi Pulse Gl66 Core I7 11800H Rtx 3060 16Gb 1Tb

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 23.9 * 259 * 359 millimeter (mm)
Product Weight 1.7 kilogram (kg) 2.25 kilogram (kg)
CPU
CPU Generation
Processor Operating Frequency
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography 11th series Core i7 processors / 8 cores / 16 threads / 10nm lithography
Dedicated Graphics Processor Specs
Integrated Graphics with Processor
Dedicated Graphics Memory 2GB GDDR6 type 6GB GDDR6 type
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb) 1 terabyte (tb)
Storage Type
Internal Memory Details NVMe SSD
Display Size 15.6 inch 15.6 inch
Panel Technology
Display Resolution FHD - 1920×1080 FHD - 1920×1080
Refresh Rate 60 hertz (hz) 144 hertz (hz)
Display Panel Coating Type Matte Matte
Touchscreen Capability false false
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity 4-cell battery with 53 Wh capacity
Optical Drive false false
Webcam true true
Webcam Details
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true false
Speaker Type Internal Dolby Audio speakers 2 speakers with a total power of 4W
Wireless Communication Details -
USB Type C Port Details - 1x USB 3.2 Gen 1 port
Charger Type -

Compare Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tbwith Razer Blade 15 Base Edition Core i7-10750H GTX 1660Ti 16GB 256GB

Feature

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Razer Blade 15 Base Edition Core i7-10750H GTX 1660Ti 16GB 256GB

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 19.9 * 235 * 355 millimeter (mm)
Product Weight 1.7 kilogram (kg) 2.09 kilogram (kg)
CPU
CPU Generation
Processor Operating Frequency
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography 10th Gen Core i7 processors / 6 cores / 12 threads / 14nm lithography
Dedicated Graphics Processor Specs
Integrated Graphics with Processor -
Dedicated Graphics Memory 2GB GDDR6 type 6GB GDDR6 type
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb)
Storage Type
Internal Memory Details PCIe SSD
Display Size 15.6 inch 15.6 inch
Panel Technology
Display Resolution FHD - 1920×1080 FHD - 1920×1080
Refresh Rate 60 hertz (hz) 144 hertz (hz)
Display Panel Coating Type Matte Matte
Touchscreen Capability false false
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity 3-cell battery with 65 Wh capacity
Optical Drive false false
Webcam true true
Webcam Details -
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true false
Speaker Type Internal Dolby Audio speakers Yes, internal stereo speakers
Wireless Communication Details -
USB Type C Port Details - 2x USB Type-C ports
Battery life (hours) - Up to 3 hours
Operating System Type - Windows 10 Home
Equivalent Name -

Compare Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tbwith Xiaomi Redmi Book Pro 15 Ryzen 7 7840H 780M 16GB 512GB

Feature

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Xiaomi Redmi Book Pro 15 Ryzen 7 7840H 780M 16GB 512GB

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 14.9 * 242 * 350 millimeter (mm)
Product Weight 1.7 kilogram (kg) 1.78 kilogram (kg)
CPU
CPU Generation
Processor Operating Frequency
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography Ryzen 7000 series / 8 cores / 16 threads / 4nm lithography
Dedicated Graphics Processor Specs -
Integrated Graphics with Processor
Dedicated Graphics Memory 2GB GDDR6 type -
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb)
Storage Type
Internal Memory Details
Display Size 15.6 inch 15.6 inch
Panel Technology
Display Resolution FHD - 1920×1080 3200 × 2000
Refresh Rate 60 hertz (hz) 120 hertz (hz)
Display Panel Coating Type Matte Matte
Touchscreen Capability false false
Ethernet Port true false
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true true
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity 72Wh Battery
Optical Drive false false
Webcam true true
Webcam Details
Backlit Keyboard false true
Fingerprint Sensor true true
Card Reader true true
Speaker Type Internal Dolby Audio speakers 2 x 2W speakers
Other Display Features - 500 nits brightness / 100% sRGB color gamut coverage / 1200:1 contrast ratio
Wireless Communication Details -

Compare Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tbwith Msi Pulse Gl66 12Ugkvo Core I7 12800H Rtx 3070 16Gb 1Tb

Feature

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Msi Pulse Gl66 12Ugkvo Core I7 12800H Rtx 3070 16Gb 1Tb

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 23.9 * 259 * 359 millimeter (mm)
Product Weight 1.7 kilogram (kg) 2.25 kilogram (kg)
CPU
CPU Generation
Processor Operating Frequency
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography 11th series Core i7 processors / 14 cores / 20 threads / 10nm lithography
Dedicated Graphics Processor Specs
Integrated Graphics with Processor
Dedicated Graphics Memory 2GB GDDR6 type 8GB GDDR6 type
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb) 1 terabyte (tb)
Storage Type
Internal Memory Details NVMe SSD
Display Size 15.6 inch 15.6 inch
Panel Technology
Display Resolution FHD - 1920×1080 QHD - 2560×1440
Refresh Rate 60 hertz (hz) 165 hertz (hz)
Display Panel Coating Type Matte Matte
Touchscreen Capability false false
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity 100Wh 4-Cell Battery
Optical Drive false false
Webcam true true
Webcam Details
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true false
Speaker Type Internal Dolby Audio speakers 2 speakers with a total power of 4W
GPU Details -
Wireless Communication Details -
USB Type C Port Details - 1x USB 3.2 Gen 1 port
Charger Type -

Compare Acer Nitro 5 AN515-58-57ZF Core i5-12500H RTX 3050 8GB 512GBwith Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Feature

Acer Nitro 5 AN515-58-57ZF Core i5-12500H RTX 3050 8GB 512GB

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 25.9 * 271 * 360 millimeter (mm)
Product Weight 1.7 kilogram (kg) 2.5 kilogram (kg)
CPU
CPU Generation
Processor Operating Frequency
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography 5th Gen Core i5 processors / 12 cores / 16 threads / 10nm lithography
Dedicated Graphics Processor Specs
Integrated Graphics with Processor
Dedicated Graphics Memory 2GB GDDR6 type 4GB GDDR6 type
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb)
Storage Type
Internal Memory Details
Display Size 15.6 inch 15.6 inch
Panel Technology
Display Resolution FHD - 1920×1080 FHD - 1920×1080
Refresh Rate 60 hertz (hz) 144 hertz (hz)
Display Panel Coating Type Matte Matte
Touchscreen Capability false false
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity 4-cell battery with 57.5 Wh capacity
Optical Drive false false
Webcam true true
Webcam Details -
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true false
Speaker Type Internal Dolby Audio speakers Internal stereo speakers
GPU Details -
Wireless Communication Details -
USB Type C Port Details - 1x USB 3.2 Type-C port

Compare Lenovo Loq 15Iax9 Core I5 12450Hx Rtx 2050 16Gb 512Gbwith Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Feature

Lenovo Loq 15Iax9 Core I5 12450Hx Rtx 2050 16Gb 512Gb

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) -
Product Weight 1.7 kilogram (kg) 2.38 kilogram (kg)
CPU -
CPU Generation
Processor Operating Frequency -
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography 12th Gen Core i5 processors / 8 cores / 12 threads / 10nm lithography
Dedicated Graphics Processor Specs
Integrated Graphics with Processor
Dedicated Graphics Memory 2GB GDDR6 type 4GB GDDR6 type
RAM Capacity
RAM Type
Storage Capacity 1 terabyte (tb)
Storage Type
Internal Memory Details
Display Size 15.6 inch 15.6 inch
Panel Technology
Display Resolution FHD - 1920×1080 FHD - 1920×1080
Refresh Rate 60 hertz (hz) 144 hertz (hz)
Display Panel Coating Type Matte Matte
Touchscreen Capability false false
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true true
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true true
Battery size and capacity 3-cell battery with 45 Wh capacity Battery with 60 Wh capacity
Optical Drive false false
Webcam true true
Webcam Details
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true false
Speaker Type Internal Dolby Audio speakers -
Wireless Communication Details -

Compare Acer Aspire Vx5 591G 7740 Core I7 16Gb 1Tb 4Gbwith Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Feature

Acer Aspire Vx5 591G 7740 Core I7 16Gb 1Tb 4Gb

Lenovo Thinkbook 15 G4 Core I5 1235U Mx550 16Gb 1Tb

Size and Dimensions 18.9 * 235 * 357 millimeter (mm) 27.9 * 267 * 389 millimeter (mm)
Product Weight 1.7 kilogram (kg) 2.5 kilogram (kg)
CPU
CPU Generation -
Processor Operating Frequency 2.80GHz to 3.80GHz
Cache Memory Size
Processor Details 12th Gen Core i5 processors / 10 cores / 12 threads / 10nm lithography -
Dedicated Graphics Processor Specs
Integrated Graphics with Processor -
Dedicated Graphics Memory 2GB GDDR6 type 4GB DDR5 type
RAM Capacity
RAM Type -
Storage Capacity 1 terabyte (tb) 1TB
Storage Type Hybrid Storage
Internal Memory Details 1TB hard disk with 256GB PCIe SSD storage
Display Size 15.6 inch 15.6 inch
Panel Technology -
Display Resolution FHD - 1920×1080 FHD - 1920×1080
Refresh Rate 60 hertz (hz) -
Display Panel Coating Type Matte -
Touchscreen Capability false false
Ethernet Port true true
Wireless Network Capability true true
Bluetooth Support true false
VGA Port false false
HDMI true true
DVI Port false false
USB Type C port true true
Thunderbolt Support true false
Presence of headphone/microphone jack true false
Battery size and capacity 3-cell battery with 45 Wh capacity Lithium-ion battery with 53Wh capacity
Optical Drive false false
Webcam true true
Webcam Details -
Backlit Keyboard false true
Fingerprint Sensor true false
Card Reader true true
Speaker Type Internal Dolby Audio speakers Two internal speakers with Dolby Audio technology
Battery life (hours) - 6:00 hour (h)
Operating System Type -
Equivalent Name - Acer Aspire VX 15 VX5-591G