I'm deciding between buying an RTX 4090 and an RTX 5080 in Canada. A 5090 is outside my budget, with prices around $5,000 CAD. RTX 5080 models range from roughly $1,700 to $2,800 CAD, while RTX 4090 cards generally cost at least $3,000 and may be used.
What are the main advantages and drawbacks of each card? Which one would you choose, and why?
4 Answers
The RTX 4090 is faster overall and has 24GB of VRAM compared with the 5080’s 16GB. That extra memory can matter in heavily modded or maxed-out 4K games, especially with demanding textures and ray tracing. If price is irrelevant and you can find a 4090 in excellent condition with a reliable warranty, it’s the more capable card.
The 5080 is usually the more sensible purchase. It’s newer, easier to buy new with a warranty, uses less power, supports newer features such as Multi Frame Generation, and includes DisplayPort 2.1. It is slower than the 4090 and has less VRAM, but it should handle most current 4K gaming very well—especially if it costs substantially less.
For value, I’d buy whichever is cheaper, since both are extremely powerful. A 4090 makes more sense if you specifically need 24GB of VRAM or want the highest traditional rendering performance. Otherwise, a new 5080 avoids the risks and uncertainty of paying several thousand dollars for a used 4090.
The decision also depends on your monitor and frame-rate goals. At 1440p or a capped 60 FPS, the practical difference may be small, and the 5080’s lower power draw can be a real advantage. For unrestricted 4K gaming, path tracing, or future titles with very high memory requirements, the 4090’s extra performance and VRAM provide more headroom. I’d choose the 5080 unless the 4090 were unusually close in price and came with strong warranty coverage.
Keep in mind that many 4090s on the market are used, and the price premium can be hard to justify. Some later models use the newer 12V-2x6 connector, but that doesn’t completely eliminate connector-related concerns.