WD Black SN770 1TB Gen4 NVMe SSD — 5150 MB/s Laptop Upgrade
The WD Black SN770 1TB NVMe SSD is a PCIe 4.0 x4 M.2 2280 internal drive built for fast game loading, 4K video editing and heavy multitasking. It delivers up to 5150 MB/s sequential read 4900 MB/s sequential write, with a 600 TBW endurance rating and a 5-year manufacturer warranty. At N.N Laptops, Shop 66A, 3rd Floor, Hafeez Center, Gulberg III, Lahore, this drive costs Rs. 19,500 with a 30-day check warranty and Lahore delivery.
Full specifications
| Brand & Model | WD Black SN770 |
|---|---|
| Capacity | 1TB |
| Interface | PCIe 4.0 x4 (Gen4 NVMe 1.4) |
| Form factor | M.2 2280 (single-sided where applicable) |
| Sequential read | up to 5150 MB/s |
| Sequential write | up to 4900 MB/s |
| Endurance (TBW) | 600 TBW |
| MTBF | 1.5 million hours |
| Warranty | 5-year manufacturer + 30-day N.N Laptops check |
Laptop compatibility
This drive is a standard M.2 2280 NVMe module, so it fits almost any laptop made in the last five years that has at least one M.2 NVMe slot. We've personally tested it in machines including Dell Latitude 5530, Latitude 5430, XPS 15 9520 Precision 7550. If your laptop has only a SATA M.2 slot (no NVMe support), see our SSD & HDD upgrades at /shop/ssd-hdd for the right drive.
How to confirm fit
Open your laptop service manual and look for the phrase "M.2 PCIe NVMe slot — 2280 length". If you see it, this SSD is a drop-in upgrade. If your manual lists "M.2 SATA" only, you need a SATA M.2 SSD instead — WhatsApp 0314 4000131 with your model and we'll confirm before you order.
Real-world performance
On a Gen4 platform the Black SN770 hits its rated speeds during sustained reads of large files — think Windows boot times under 9 seconds, a 50 GB game install in under three minutes, and 4K video scrubbing without dropped frames. Random 4K performance is equally strong, which is what you actually feel when booting Windows, launching apps, and switching between Chrome tabs. The drive uses dynamic SLC caching, so small writes (project files, documents, photos) feel instantaneous.
Thermals
Like any high-end NVMe drive, the Black SN770 can warm up under sustained heavy writes. In a slim laptop with no built-in M.2 heatsink we recommend running HWiNFO and watching temps the first week — most users see 55-70°C under normal load, which is well within Samsung/Kingston/WD spec. For gaming or constant 4K editing, a thin thermal pad between the drive and the bottom cover helps.
How to install in your laptop
Installation is straightforward and takes about 10 minutes:
- Power down the laptop and remove the bottom cover (usually 8-12 Phillips screws).
- Locate the M.2 2280 slot — it's a long narrow connector with a single mounting screw at the far end.
- Insert the SSD at a 30° angle, then press it flat and secure with the mounting screw.
- Reassemble and boot. Use Samsung Data Migration / Acronis True Image / Macrium Reflect to clone your existing drive, or install Windows fresh from a USB stick.
If you'd rather not open your laptop yourself, drop it at our shop and we'll install and clone for Rs. 1,500 (free for purchases above Rs. 20,000). We also stock matching RAM upgrades — see /shop/ram.
Where to buy in Pakistan
The WD Black SN770 1TB NVMe SSD is in stock at our Hafeez Center counter on the 3rd floor (Shop 66A) for Rs. 19,500. We deliver free across Lahore, ship via TCS and Leopards across Pakistan nationwide via TCS / Leopards, and accept. Walk-in welcome 7 days a week. WhatsApp 0314 4000131 to confirm stock or ask compatibility questions before you order. Looking for matched RAM at the same time? Browse our NVMe and SATA SSDs at /shop/ssd-hdd.
Frequently asked questions
Will it fit my Dell XPS 13 9370?
If your laptop has an M.2 2280 NVMe slot (most 2018+ business and gaming laptops), yes. Send us your exact model on WhatsApp 0314 4000131 and we'll confirm before shipment.
Is this Gen3 or Gen4 NVMe?
This drive is Gen4 (PCIe 4.0 x4). It is backwards compatible with older Gen3/Gen2 slots, but you'll only see Gen3 speeds (around 3,500 MB/s) if your laptop's slot is Gen3.
What is TBW and does 600 TBW matter for me?
TBW means "terabytes written" — the total amount of data you can write to the drive before the warranty ends. 600 TBW is enough to write the full capacity of this drive every day for several years, which is far more than typical home or business use.
Will my Windows licence transfer if I clone the old drive?
Yes. Windows 10 and 11 licences are tied to your motherboard, not the SSD. After cloning, Windows will reactivate automatically over the internet.
Do you offer installation in Lahore?
Yes — Rs. 1,500 in-shop install with clone, free for purchases above Rs. 20,000. Walk into Shop 66A, Hafeez Center any time during business hours.
New vs Used options
This listing features a brand new, factory-sealed WD Black SN770 1TB at Rs. 42,299 — ideal for those who want a full 5-year manufacturer warranty and guaranteed zero write cycles. We also carry thoroughly tested used drives at Rs. 19,500 with a 30-day check warranty. Both options are bench-tested and ready to ship. If you're building a new high-end laptop or need maximum reliability for a work machine, go new. For a budget upgrade in a secondary laptop, the used option delivers the same speeds at half the cost. WhatsApp 0314 4000131 to ask which condition fits your needs.
Performance comparison: SN770 vs SN570 vs Samsung 980 Pro
The SN770 is WD's mainstream Gen4 performer. It's faster than the SN570 (Gen3, ~3500 MB/s) and slightly behind the Samsung 980 Pro (~7000 MB/s read) but costs significantly less. For laptops that top out at Gen4 speeds around 5000 MB/s (most non-enthusiast models), the SN770 hits the practical limit. Real-world loading times are nearly identical to pricier drives. The SN770 also uses WD's in-house controller and BiCS5 112-layer TLC NAND, offering good endurance and power efficiency — important for battery life.
If you're upgrading from a SATA SSD or old HDD, the SN770 will feel like a whole new machine. Apps launch instantly, file transfers are dramatically faster, and multitasking stutter disappears.
Buy with confidence from N.N Laptops
We are a trusted retailer in Lahore's Hafeez Center (Shop 66A, 3rd Floor, Gulberg III). Every SSD — new or used — is quality-checked before dispatch. We ship nationwide via TCS and Leopards to Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar, Sialkot and more. Same-day delivery in Lahore. For orders outside Lahore, shipping is via TCS / Leopards nationwide. Contact Sayam on WhatsApp 0314 4000131 for live photos, compatibility checks, or to place an order. Visit nnlaptops.com for more laptop parts and upgrades.
