In depth comparison and review of Lenovo Yoga C640-13IML (Lenovo Yoga C640) and Lenovo Yoga 730-15IKB (81CU). Compare sizes, performance, storage capacities, batteries and other important specifications and features to easily choose the right laptop for you. Our goal is to help you uncover differences between the products and find the laptop that will best fit your needs.
Advantages and disadvantages of Lenovo Yoga C640-13IML (Lenovo Yoga C640) based on its technical characteristics, features, user experience, expert reviews and price level.
long battery life
lightweight design
responsive touchscreen
solid build quality
fast charging support
limited port selection
average speaker quality
no dedicated GPU
higher price point
Advantages and disadvantages of Lenovo Yoga 730-15IKB (81CU) based on its technical characteristics, features, user experience, expert reviews and price level.
flexible 2-in-1 design
responsive touchscreen display
solid build quality
decent battery life
good overall performance
heavier than competitors
limited port selection
noisy under load
average color accuracy
| DESIGN AND DIMENSIONS | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Product Type | Notebook - flip design | Notebook - flip design |
|---|---|---|
| Dimensions (WxDxH) | 30.6 cm x 20.448 cm x 1.695 cm | 36 cm x 24.9 cm x 1.715 cm |
| Weight | 1.35 kg | 1.89 kg |
| Case Material | Aluminum, polycarbonate, glass-fibre | Aluminum |
| Colour | Iron grey | Iron grey |
| DISPLAY | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Screen Size (Type) | 13.3" - IPS | 15.6" - IPS |
|---|---|---|
| Touchscreen | Yes (10-point multi-touch) | Yes (10-point multi-touch) |
| LCD Backlight Technology | LED backlight | LED backlight |
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1080 (Full HD) |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 400 cd/m² | 300 cd/m² |
| Colour Gamut | 72% NTSC | - |
| Features | Anti-glare, 72% NTSC colour gamut | Anti-glare |
| PROCESSOR | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| CPU | Intel Core i5 (10th Gen) 10210U / 1.6 GHz | Intel Core i7 (8th Gen) 8550U / 1.8 GHz |
|---|---|---|
| Max Turbo Speed | 4.2 GHz | 4 GHz |
| Number of Cores | Quad-Core | Quad-Core |
| Cache | 6 MB | 8 MB |
| 64-bit Computing | Yes | Yes |
| Features | Integrated memory controller | Integrated memory controller |
| MEMORY | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| RAM | 8 GB (provided memory is soldered) | 16 GB (1 x 8 GB + 8 GB (soldered)) |
|---|---|---|
| Max RAM Supported | - | 16 GB |
| RAM Type | DDR4 SDRAM | DDR4 SDRAM |
| Speed | 2400 MHz | 2400 MHz |
| Rated Speed | 2400 MHz | 2400 MHz |
| Form Factor | - | SO-DIMM 260-pin |
| Slots Qty | - | 1 |
| Empty Slots | - | 0 |
| STORAGE | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Main Storage Size (HDD/SSD) | 256 GB SSD M.2 2242 PCIe 3.0 x2 - NVM Express (NVMe) | 256 GB SSD M.2 PCIe |
|---|
| AUDIO & VIDEO | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Multi-GPU Configuration | - | 1 single GPU card / integrated GPU |
|---|---|---|
| Graphics Processor (GPU) | Intel UHD Graphics | NVIDIA GeForce GTX 1050 / Intel UHD Graphics 620 |
| Video Memory | - | 4 GB GDDR5 SDRAM |
| Camera | Yes - 720p | Yes - 720p |
| Resolution | - | 1 Megapixel |
| Camera Features | Privacy shutter | - |
| Sound | Stereo speakers, dual array microphone | Stereo speakers, dual array microphone |
| Codec | - | Conexant CX11870 |
| Compliant Standards | High Definition Audio, Dolby Atmos | High Definition Audio, Dolby Atmos |
| Audio Features | - | JBL |
| COMMUNICATIONS | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 5.0 | 802.11a/b/g/n/ac, Bluetooth 4.1 |
|---|---|---|
| Wireless Controller | M.2 Card | M.2 Card |
| Features | Dual stream (2x2) | - |
| BATTERY | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Technology | Lithium Ion | Lithium Ion |
|---|---|---|
| Battery Capacity (Size) | 60 Wh | 51.5 Wh |
| Battery Life | Up to 20 hours | Up to 11 hours |
| AC ADAPTER | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 120/230 V (50/60 Hz) |
|---|---|---|
| Output | 45 Watt | 90 Watt |
| INPUT | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Type | Keyboard, digitizer, touchpad, digital pen | Keyboard, digitizer, touchpad, digital pen |
|---|---|---|
| Keyboard Backlight | Yes | Yes |
| Features | Multi-touch touchpad, buttonless touchpad | Multi-touch touchpad, buttonless touchpad |
| CONNECTIONS & EXPANSIONS | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Interfaces | 2 x USB 3.1 Gen 1 USB-C 3.1 Gen 1 (supports DisplayPort Alt Mode) Headphone/microphone combo jack |
USB 3.1 Gen 1 USB 3.1 Gen 1 (Always On) USB-C 3.1 Gen 1 (supports Thunderbolt 3) HDMI Headphone/microphone combo jack |
|---|
| SOFTWARE | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Operating System (OS) | Windows 10 Home 64-bit Edition - English | Windows 10 Home 64-bit Edition - English |
|---|---|---|
| Software Included | Microsoft Office (Trial) | - |
| MISCELLANEOUS | Lenovo Yoga C640-13IML (Lenovo Yoga C640) | Lenovo Yoga 730-15IKB (81CU) |
|---|
| Included Accessories | Power adapter, Lenovo Active Pen | Power adapter, Lenovo Active Pen 2, pen holder |
|---|---|---|
| Integrated Options | Accelerometer | Accelerometer, gyro sensor |
| Security | Firmware Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader | Firmware Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader |
| Features | Administrator password, power-on password | Administrator password, power-on password |
| Compliant Standards | RoHS | RoHS |
| SAR Value | 0.32 W/kg (body), 0.32 W/kg (limb) | - |
| ENERGY STAR Certified | Yes | Yes |
| Manufacturer Warranty | Limited warranty - 1 year - pick-up and return | Limited warranty - 1 year - pick-up and return |
| Model Number | 13IML 81UE | - |
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