The Oppo K12x and vivo iQOO Z9 Turbo Endurance represent distinct approaches to the competitive mid-range smartphone market. The K12x focuses on delivering a solid all-around experience at a potentially lower price point, while the iQOO Z9 Turbo Endurance prioritizes sustained performance and endurance, leveraging Qualcomm’s newer Snapdragon 8s Gen 3 chipset. This comparison dissects the key differences to determine which device best suits your needs.
🏆 Quick Verdict
For the average user prioritizing gaming and long-term performance, the vivo iQOO Z9 Turbo Endurance is the clear winner. Its Snapdragon 8s Gen 3 offers a substantial performance leap over the Oppo K12x’s Snapdragon 695, ensuring smoother multitasking and a better gaming experience. While both offer 80W charging, the iQOO’s superior chipset justifies the likely price difference.
| Network |
|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 850 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G bands | 1, 3, 4, 5, 8, 28, 34, 38, 39, 40, 41 | 1, 3, 5, 8, 28, 34, 38, 39, 40, 41 |
| 5G bands | 1, 5, 8, 28, 41, 77, 78 SA/NSA | 1, 5, 8, 28, 41, 77, 78 SA/NSA |
| Speed | HSPA, LTE, 5G | HSPA, LTE, 5G |
| Technology | GSM / CDMA / HSPA / LTE / 5G | GSM / CDMA / HSPA / LTE / 5G |
| Launch |
|---|
| Announced | 2024, March 14 | 2025, January 03 |
| Status | Available. Released 2024, May 20 | Available. Released 2025, January 03 |
| Body |
|---|
| Build | Glass front, plastic frame, plastic back | Glass front, plastic back, plastic frame |
| Dimensions | 162.9 x 75.6 x 8.1 mm (6.41 x 2.98 x 0.32 in) | 163.7 x 75.9 x 8 mm (6.44 x 2.99 x 0.31 in) |
| SIM | Nano-SIM + Nano-SIM | Nano-SIM + Nano-SIM |
| Weight | 191 g (6.74 oz) | 196 g (6.91 oz) |
| Display |
|---|
| Resolution | 1080 x 2400 pixels, 20:9 ratio (~395 ppi density) | 1260 x 2800 pixels, 20:9 ratio (~453 ppi density) |
| Size | 6.67 inches, 107.4 cm2 (~87.2% screen-to-body ratio) | 6.78 inches, 111.0 cm2 (~89.3% screen-to-body ratio) |
| Type | OLED, 120Hz, 600 nits (typ), 1200 nits (HBM), 2100 nits (peak) | AMOLED, 1B colors, 144Hz, HDR |
| Platform |
|---|
| CPU | Octa-core (2x2.2 GHz Kryo 660 Gold & 6x1.7 GHz Kryo 660 Silver) | Octa-core (1x3.0 GHz Cortex-X4 & 4x2.8 GHz Cortex-A720 & 3x2.0 GHz Cortex-A520) |
| Chipset | Qualcomm SM6375 Snapdragon 695 5G (6 nm) | Qualcomm SM8635 Snapdragon 8s Gen 3 (4 nm) |
| GPU | Adreno 619 | Adreno 735 |
| OS | Android 14, ColorOS 14 | Android 14, OriginOS 4 |
| Memory |
|---|
| Card slot | microSDXC (uses shared SIM slot) | No |
| Internal | 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM, 512GB 12GB RAM | 256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM |
| Main Camera |
|---|
| Dual | 50 MP, f/1.8, (wide), 1/2.76", PDAF
Auxiliary lens | 50 MP, f/1.8, (wide), 1/1.95", 0.8µm, PDAF, OIS
8 MP, f/2.2, (ultrawide) |
| Features | LED flash, HDR, panorama | LED flash, panorama, HDR |
| Video | 1080p@30fps, gyro-EIS | 4K@30/60fps, 1080p, gyro-EIS, OIS |
| Selfie camera |
|---|
| Features | Panorama | - |
| Single | 16 MP, f/2.4, (wide) | 16 MP, f/2.5, (wide), 1/3.0", 1.0µm |
| Video | 1080p@30fps | 1080p@30fps |
| Sound |
|---|
| 35mm jack | Yes | No |
| Loudspeaker | Yes, with stereo speakers | Yes, with stereo speakers |
| Comms |
|---|
| Bluetooth | Yes | 5.4, A2DP, LE, aptX HD, aptX Adaptive, aptX Lossless |
| Infrared port | - | Yes |
| NFC | No | Yes |
| Positioning | GPS, GALILEO, GLONASS, BDS, QZSS | GPS (L1+L5), GLONASS (G1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5) |
| Radio | No | No |
| USB | USB Type-C 2.0 | USB Type-C 2.0, OTG |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band |
| Features |
|---|
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
| Battery |
|---|
| Charging | 80W wired, PD3.0, 100% in 50 min | 80W wired
7.5W reverse wired |
| Type | 5500 mAh | Si/C Li-Ion 6400 mAh |
| Misc |
|---|
| Colors | Gray, Light Green | Black, White, Blue |
| Models | PJT110 | V2352GA |
| Price | About 170 EUR | About 250 EUR |
Oppo K12x (China)
- Potentially lower price point
- 80W fast charging
- Reliable for everyday tasks
- Significantly weaker processor
- Likely limited gaming performance
- May lack advanced camera features
vivo iQOO Z9 Turbo Endurance
- Powerful Snapdragon 8s Gen 3
- Superior gaming performance
- 7.5W reverse wired charging
- Likely higher price
- May experience some thermal throttling under extreme load
- Potentially larger file size for system updates
Display Comparison
Neither device’s display specifications are provided, so a direct comparison is limited. However, given the iQOO Z9 Turbo Endurance’s focus on gaming, it’s reasonable to expect a higher refresh rate panel than the K12x. The K12x, positioned as a value-oriented device, likely utilizes a standard LCD or AMOLED panel. Color accuracy and peak brightness will be key differentiators, but without data, we can only speculate. The iQOO’s potential for a higher refresh rate would benefit gamers, reducing motion blur and improving responsiveness.
Camera Comparison
Without detailed camera specifications, a thorough comparison is impossible. However, given the K12x’s positioning, it likely features a more basic camera setup focused on everyday photography. The iQOO Z9 Turbo Endurance, targeting a more enthusiast audience, may include a larger sensor or more advanced features like optical image stabilization (OIS). Lens apertures will also play a role; wider apertures (lower f-number) allow for better low-light performance. The absence of information prevents a definitive judgment, but the iQOO is more likely to offer a superior camera experience.
Performance
The core difference lies in the chipsets. The iQOO Z9 Turbo Endurance’s Snapdragon 8s Gen 3 (4nm) is a significant upgrade over the Oppo K12x’s Snapdragon 695 (6nm). The 8s Gen 3 features a 1x3.0 GHz Cortex-X4 prime core, 4x2.8 GHz Cortex-A720 performance cores, and 3x2.0 GHz Cortex-A520 efficiency cores, offering substantially higher CPU and GPU performance. The 6nm process of the Snapdragon 695, while efficient, cannot compete with the 4nm node of the 8s Gen 3 in terms of raw power and thermal efficiency. This translates to less throttling during sustained workloads like gaming. The iQOO will handle graphically intensive games at higher settings and frame rates with ease, while the K12x will likely struggle with demanding titles.
Battery Life
Both devices feature 80W wired charging, promising a quick 0-100% charge in approximately 50 minutes (as confirmed for the K12x). The iQOO Z9 Turbo Endurance also includes 7.5W reverse wired charging, a feature absent in the K12x. While battery capacity isn’t specified, the Snapdragon 8s Gen 3’s superior efficiency means the iQOO can potentially deliver comparable or even better battery life despite potentially having a similar or smaller battery capacity. The 4nm process node contributes significantly to power savings.
Buying Guide
Buy the Oppo K12x (China) if you need a reliable daily driver for basic tasks, social media, and light gaming, and are on a strict budget. It’s a sensible choice for users who don’t demand peak performance. Buy the vivo iQOO Z9 Turbo Endurance if you prioritize gaming, demanding applications, and future-proofing, and are willing to spend a bit more for a significantly more powerful processor and improved thermal management.
Frequently Asked Questions
❓ Will the Snapdragon 695 in the Oppo K12x struggle with demanding games like Genshin Impact?
Yes, the Snapdragon 695 is a mid-range chipset and will likely struggle to run Genshin Impact at high settings. You’ll likely need to lower the graphics settings significantly to achieve playable frame rates, and even then, expect some stuttering. The iQOO Z9 Turbo Endurance with the Snapdragon 8s Gen 3 is far better suited for demanding games.
❓ Does the iQOO Z9 Turbo Endurance’s 80W charging generate excessive heat during charging?
While 80W charging is fast, the iQOO Z9 Turbo Endurance incorporates thermal management features to mitigate heat generation. The Snapdragon 8s Gen 3’s 4nm process also contributes to lower heat output compared to older chipsets. While the phone will warm up during charging, it shouldn’t reach uncomfortable temperatures.
❓ Is the reverse wired charging on the iQOO Z9 Turbo Endurance useful for accessories like earbuds?
The 7.5W reverse wired charging is primarily intended for small accessories like earbuds or smartwatches. It’s not designed to rapidly charge larger devices like another smartphone. It’s a convenient feature for topping up smaller devices on the go, but don’t expect it to replace a dedicated charger.
