Buying a graphics card has turned into opening a blind box: The RTX 5070 is reportedly swapping chips on the sly — a 43% bigger core with identical performance. On September 8, tipster hongxing2020 dropped the news on X that the RTX 5070 would use a GB203 core, and a new driver confirmed it the very next day. This isn't unusual for NVIDIA — it's far from the first time. The same 5070 could have two different chips inside.

💡 What You Will Learn

Buying a graphics card has turned into opening a blind box: The RTX 5070 is reportedly swapping chips on the sly — a 43% bigger core with identical performance. On September 8, tipster hongxing2020 dr

📜 Table of Contents

• The Same 5070 Could Have Two Different Chips Inside
• The Die Is 43% Bigger — Why Is Performance Identical?
• This Already Happened Once This Year
• What Buyers Actually Have to Deal With

Buying a Graphics Card Is Now a Blind Box: RTX 5070 Reportedly Swapping Cores in Secret — 43% Bigger Die, Identical Performance

On September 8, tipster hongxing2020 dropped the news on X that the RTX 5070 would be moving to a GB203 core, and the very next day a new driver confirmed it. This isn't anything unusual for NVIDIA — it's far from the first time.

The Same 5070 Could Have Two Different Chips Inside

The RTX 5070 currently on shelves uses the GB205-300 core: 263 mm², 31.1 billion transistors. The rumored new version swaps in the GB203, a chip originally destined for the tier-above RTX 5070 Ti and RTX 5080 — 378 mm², 45.6 billion transistors. That's 43% more area and 46% more transistors.

The Die Is 43% Bigger — Why Is Performance Identical?

A fully enabled GB203 has 10,742 CUDA cores and a 256-bit memory bus — that's the RTX 5080 configuration. Before it can go into a 5070, NVIDIA has to disable 42.8% of the compute units and a quarter of the memory channels through circuit fusing, cutting it back to 6144 cores and 192-bit. The power limit also stays at 250W.

The number of working units is unchanged, clocks and power are unchanged, so game frame rates naturally stay the same. TechPowerUp's verdict is blunt: unless NVIDIA happens to bump clocks or loosen the power limit, the two versions perform essentially identically, with differences coming only from each board partner's cooling, power delivery, and factory overclock. In other words, those extra 14.5 billion transistors are mostly just lying there on the card.

This Already Happened Once This Year

The RTX 5060 walked this path first. The 5060 originally shipped with the smaller GB206 core, but this year MSI's V1 revision and some Yeston models have been found using a cut-down GB205 instead. Quasar Zone tested an ASUS card with the swapped core and concluded overall performance was basically on par with the standard version, with individual benchmarks trading wins.

Shoving disabled high-end salvage dies into lower tiers is called binning in the industry: dies cut from a wafer vary in quality, and a GB203 that doesn't meet 5080 or 5070 Ti standards can be fused off and sold as a 5070 — better than scrapping it. The practice itself is legitimate, and the 5060 testing proved performance doesn't take a hit.

What Buyers Actually Have to Deal With

The real gripe is elsewhere: the packaging and model name won't tell you which chip is inside. For the same money, you might get a GB205 or you might get a GB203 — you only find out by tearing down the card or checking the device ID in software. Performance-wise the two versions are equivalent, and the bigger-die version theoretically has more thermal and power headroom, but none of that comes with any official guarantee.

Stack that on top of this generation's price hikes and the blind-box feeling gets worse. A domestic media tally in August showed RTX 50-series retail prices rising as much as 39% that month, with MSRP essentially existing in name only. Prices go up while version information stays opaque — consumers are left checking the core codename with GPU-Z after delivery. And anyone who already bought a GB205 version has no reason to return it, because the two versions are the same card.

Two signals are worth watching next: whether the September 9 driver adds a new device ID, and whether board partners like ASUS and MSI quietly list V2 models. The rumor only truly lands once retail cards actually show up. If you're currently eyeing a 5070, would you go out of your way to pick the big-die version?