iQOO 3 disassembly: The motherboard is double-stacked for higher integration

iQOO 3, released at the beginning of the year, is the sixth product of iQOO and the second 5G mobile phone released by the iQOO brand. It can be said that iQOO 3 provides the most competitive hardware and performance at the moment, and also offers a price that is hard to refuse, which has made iQOO 3 sales soar after its launch, becoming one of the most popular 5G mobile phones in the 4,000 yuan price range. What is special about the internal workmanship of iQOO 3? The following is a micro-disassembly review to reveal it to you.

iQOO 3 configuration at a glance:

SoC: Qualcomm Snapdragon 865 processor | 7nm process

Screen: 6.44 inches | Super AMOLED full screen | Resolution 2400x1080 | Screen ratio 84.2%

Storage: 6GB RAM + 128GB ROM

Front camera: 16 megapixel camera

Rear camera: 48MP main camera + 13MP wide-angle camera + 13MP portrait camera + 2MP depth of field camera

Battery: 4370mAh lithium-ion polymer battery

Features: Support dual-mode 5G full network access | side pressure-sensitive buttons

Release price: 3598 yuan 

Disassembly steps:

The iQOO 3 card tray has a silicone ring to provide some waterproof and dustproof effects. The back cover and the inner support are fixed with glue. Use a hot air gun to heat to 190°C, heat the gap between the back cover and the inner support, and slowly open the back cover.

The iQOO 3 rear camera cover is fixed to the rear camera with foam glue, and there is also foam between the camera to enhance the airtightness of the phone.

The iQOO 3 motherboard cover and the speaker are fixed with screws, and a large area of ​​graphite sheet covers the battery and speaker positions to dissipate heat.

The flash soft board and antenna soft board of iQOO 3 are fixed with glue, and the earpiece module and the main board are connected by a soft board on the front of the main board cover.

The cameras of iQOO 3 are all separate modules, and the soft board is covered with conductive tape for protection. The soft board of the 13-megapixel portrait camera is covered with a BTB cover for protection. The motherboard processor & memory position is coated with heat dissipation silicone grease and directly contacts the heat dissipation copper tube for heat dissipation. Heat dissipation copper foil is attached to the main and sub-boards for heat dissipation.

The battery of iQOO 3 is fixed to the inner support with plastic tape and is equipped with a handle for easy removal.

The soft buttons on both sides of the inner support of iQOO 3 are equipped with protective silicone pads, the front fingerprint recognition sensor soft board is protected by a cover, and a silicone ring is placed at the speaker outlet for waterproofing.

The iQOO 3 liquid cooling copper tube extends from the motherboard to the battery position to dissipate heat.

The screen of iQOO 3 is fixed to the inner support with glue. Use a heating table to heat it to about 80°C to separate the screen from the inner support.

Like the previous generation iQOO Pro 5G, the iQOO 3 motherboard also adopts a double-layer stacking method.

Module Information

The iQOO 3 screen uses a 6.44-inch 2400x1080 resolution Super AMOLED full screen, model is Samsung AMS644UQ01.

The iQOO 3 has a rear 48-megapixel main camera, model Sony IMX582, with an aperture of f/1.79; a rear 13-megapixel portrait camera, model Samsung S5K3L6, with an aperture of f/2.46; a rear 13-megapixel wide-angle camera, model Samsung S5K3L6, with an aperture of f/2.2; and a rear 2-megapixel depth of field camera, model GalaxyCore GC2375, with an aperture of f/2.4.

The iQOO 3 has a 16-megapixel front camera, model number is Samsung S5K3P9, and the aperture is f/2.45.

Collection diagram:

Mainboard IC information:

1: Qualcomm-QDM2310-RF front-end module chip

2: Qualcomm-QM77040-RF front-end module chip

3: Skyworks-Sky78191-21-RF front-end module chip

4: Samsung-KLUDG4UHDB-B2D1-128GB flash memory chip

5: Samsung - K3LK2K20BM-6GB memory chip

6: Qualcomm-SM8250-Qualcomm Snapdragon 865 processor chip

7: Qualcomm - XD55M-5G module chip

Main IC on the back of the motherboard

1: Qualcomm-PMX55-power management chip

2: Qualcomm-PM8150A-Power Management Chip

3: Qualcomm-PM8250-Power Management Chip

4: Qualcomm-PM8150B-Power Management Chip

5: Qualcomm-SDR865-RF transceiver chip

Main IC on the back of the small board:

1: Qualcomm-QCA6391-WiFi/BT chip

2: NXP-SN100T-NFC control chip

3: Qualcomm-QPM5677-RF power amplifier chip

4: Qualcomm-QPM6585-RF power amplifier chip

5: Qualcomm-QPM5679-RF power amplifier chip

Disassembly summary

Judging from the disassembly results, iQOO 3 adopts a three-stage design with a rigorous overall design. It is equipped with the top hardware at the time of its release. The motherboard adopts a double-layer stacking method, which is more integrated and saves more space. Thanks to this, iQOO 3 is packed with a 4440 mAh large battery to ensure long battery life under 5G network speed.

However, the double-layer stacking of the motherboard and the high-speed data transmission of 5G will bring heat dissipation problems. iQOO 3 uses graphite sheets + heat dissipation silicone grease + liquid cooling copper tubes to dissipate heat. The liquid cooling copper tubes extend from the motherboard to the battery position, and large areas of graphite sheets are attached to the motherboard and battery positions for heat dissipation. In addition, the entire machine has silicone rings at the SIM card tray and the speaker outlet for waterproof design. The overall workmanship is good and the details are well handled.

iQOO 3 is equipped with Qualcomm Snapdragon 865 mobile platform, equipped with LPDDR 5 and UFS 3.1 flash memory to form a super performance combination, supports Wi-Fi 6, and uses carbon fiber VC liquid cooling system for efficient heat dissipation. Excellent hardware performance plus X-axis linear motor and Hawkeye display enhancement technology make it the official KPL competition machine. The multi-modal antenna and side distributed antenna allow 4G/5G network intelligent switching. With such a powerful configuration, the current rush price starts at only 2,898 yuan, which is really good.

iQOO has a mature supply chain control capability and provides the ultimate performance earlier than its competitors. In addition to performance, it also tries to integrate with a large new user group with a cooler and newer experience and explore new experiences for future mobile phones. This may be the secret of iQOO's success after just over a year of launch.