LG LG Gram SuperSlim 15Z90RT (2023) Specifications
The LG LG Gram SuperSlim 15Z90RT (2023) is an ultraportable laptop designed for productivity and portability. This guide covers RAM, SSD, charger compatibility, and upgrade paths for this model. For a comprehensive overview of all LG upgradeable models, visit the LG Laptop Upgrades hub.
| Component | Specification |
|---|---|
| Processor | i7-1360P |
| RAM | LPDDR5, 0 slots (soldered) |
| Max RAM | 16GB (soldered) |
| Storage | M.2 2280 NVMe PCIe Gen4, 2 slots |
| Charger | 72W USB-C |
| Ports | 2x Thunderbolt 4, 1x USB 3.2, 1x HDMI 2.0 |
| Display | 15.6″ FHD OLED |
| Weight | 0.99 kg (2.18 lbs) |
Memory Upgrade Path
The LG Gram SuperSlim 15Z90RT has soldered LPDDR5 RAM (16GB (soldered)) which cannot be upgraded after purchase. Select the maximum RAM configuration when buying.
Important: Since the RAM is not user-replaceable, we recommend opting for at least 16GB at purchase to ensure adequate performance for years to come.
Storage Expansion
The LG Gram SuperSlim 15Z90RT uses a standard M.2 2280 NVMe SSD with a NVMe PCIe Gen4 interface. With 2 M.2 slots, you can run dual NVMe drives for expanded storage.
Recommended M.2 2280 SSDs:
- Samsung 990 Pro NVMe 2280 — Flagship NVMe SSD with exceptional speeds.
- WD Black SN850X 2280 — High-performance NVMe with excellent sustained writes.
- Crucial P5 Plus NVMe 2280 — Excellent value NVMe with strong real-world performance.
Power Delivery & Charging
The LG Gram SuperSlim 15Z90RT uses a 72W USB-C charger. This is compatible with any USB-C PD charger of equal or higher wattage from brands like Anker, Ugreen, or the original LG charger.
Compatible USB-C PD Chargers:
- Anker 72W USB-C PD Charger — Compact GaN charger with multiple ports.
- Ugreen USB-C PD Charger (72W+) — Affordable universal charger with fast charging.
- INIU USB-C PD Fast Charger — Budget option with reliable performance.
Port & Docking Capabilities
Connectivity: 2x Thunderbolt 4, 1x USB 3.2, 1x HDMI 2.0
The Thunderbolt 4 ports provide fast external storage and high-bandwidth peripherals. Consider a Thunderbolt dock like the CalDigit TS4 or Belkin Thunderbolt 4 Dock Pro for desktop expansion.
Upgrade Difficulty & Tools Required
The LG Gram SuperSlim 15Z90RT has a difficulty rating of 2/5 for upgrades (5 = easiest). The upgrade process is difficult — limited user-accessible components.
Tools needed:
- Phillips screwdriver (M2.5 or similar)
- Plastic spudger or pry tool (for bottom panel clips)
- ESD wrist strap (optional but recommended)
We recommend backing up your data and consulting the official service manual before opening the chassis.
Frequently Asked Questions
Can I upgrade the RAM in the LG LG Gram SuperSlim 15Z90RT?
The LG Gram SuperSlim 15Z90RT has soldered RAM (16GB (soldered)) which cannot be upgraded after purchase. Choose the maximum RAM when buying.
What is the maximum RAM for the LG Gram SuperSlim 15Z90RT?
The LG Gram SuperSlim 15Z90RT supports up to 16GB (soldered) of LPDDR5 memory.
Can I add a second SSD to the LG Gram SuperSlim 15Z90RT?
The LG Gram SuperSlim 15Z90RT has 2 M.2 slots. You can add a second NVMe SSD.
Can I use any USB-C charger with the LG Gram SuperSlim 15Z90RT?
Yes, any USB-C Power Delivery charger rated for 72W or higher will work with the LG Gram SuperSlim 15Z90RT.
Is the LG Gram SuperSlim 15Z90RT easy to upgrade?
The LG Gram SuperSlim 15Z90RT has a difficulty rating of 2/5. Consider professional assistance for upgrades.
Recommended Products
These are the products we recommend based on this guide. All links go to Amazon UK where you can check current prices and availability.
| Product | Why We Recommend It | Amazon UK |
|---|---|---|
| Samsung 990 Pro NVMe 2280 | Flagship NVMe SSD with exceptional speeds. | View on Amazon UK |
| WD Black SN850X 2280 | High-performance NVMe with excellent sustained writes. | View on Amazon UK |
| Crucial P5 Plus NVMe 2280 | Excellent value NVMe with strong real-world performance. | View on Amazon UK |
| Anker 72W USB-C PD Charger | Compact GaN charger for USB-C laptops. | View on Amazon UK |
| Ugreen 72W USB-C PD Charger | Affordable universal USB-C charger. | View on Amazon UK |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
