Video memory, or VRAM, is the pool of memory on the graphics card itself. Textures, frame buffers and ray-tracing data live there. When a game needs more VRAM than the card has, frame rates fall off a cliff and textures pop in late. The GPU's raw speed does not help at that point, which is why VRAM is worth checking before you look at benchmarks.
Rule of thumb by resolution
| Target | Comfortable VRAM | Notes |
|---|---|---|
| 1080p, high settings | 8GB | Fine for esports and most titles. Newer AAA games at ultra textures can exceed it. |
| 1440p, high to ultra | 12GB | The practical minimum for a card you plan to keep three or more years. |
| 4K, ultra with ray tracing | 16GB or more | Several current releases use 14GB or more at 4K with ray tracing on. |
| Video editing and 3D | 16GB or more | Timeline scrubbing, effects and rendering scale with available VRAM. |
| Local AI models | As much as you can afford | Model size decides what runs at all. 24GB opens up far more than 16GB. |
Why two cards with the same VRAM can behave differently
VRAM capacity is only part of the story. Memory bandwidth depends on the memory type (GDDR6 versus GDDR6X or GDDR7) and the bus width (128-bit, 192-bit, 256-bit). A 12GB card on a 192-bit bus feeds its GPU slower than a 16GB card on a 256-bit bus. Both numbers appear in the specification table on every KERNOVIQ graphics card listing.
What about older cards?
A refurbished GeForce RTX 3060 12GB or RTX 3070 Ti 8GB can still be a good buy for 1080p and 1440p. The 3060's 12GB is generous for its class and ages well. The 3070 Ti is faster but its 8GB means dialling texture quality down a notch in the newest titles at 1440p. Match the card to the monitor you actually own, not the one you might buy later.
Power and case fit
More VRAM usually means a bigger card with a higher power draw. Before you buy, check three things on the listing:
- Length. Compare it with your case's maximum GPU length. Many mid towers top out around 330 to 360mm.
- Power connector. Older cards use one or two 8-pin PCIe connectors. Many newer cards use the 12V-2x6 connector and ship with an adapter.
- Recommended PSU wattage. The manufacturer's number assumes a typical system. Add headroom if you run a high-end CPU.
The decision in one line
Buy 8GB only for 1080p on a budget, 12GB for a 1440p card you will keep, and 16GB or more for 4K, creative work or AI. Every graphics card on KERNOVIQ lists VRAM, memory type, bus width, length, connectors and recommended PSU wattage, so the comparison takes one look.