The RTX 4090 still wins on raw gaming and AI performance thanks to 24 GB of VRAM and higher bandwidth, but the RTX 5080 is cheaper, cooler, and adds DLSS 4. Buy the 4090 for more VRAM and top-tier speed; buy the 5080 for better value and the newest features.
Quick answer. This is the classic “new mid-flagship vs last-gen flagship” question. The 4090’s 24 GB and higher bandwidth keep it ahead on performance, especially for AI and 4K. The 5080 answers with a lower price, lower power draw, and DLSS 4 multi-frame generation — but only 16 GB of VRAM.
Quick answer: NVIDIA GeForce RTX 4090 leads on both gaming and AI workloads. NVIDIA GeForce RTX 5080 gives the best performance per dollar of the group. Look at VRAM and memory bandwidth for capability, TDP for power and heat, and separate gaming vs AI performance scores. Then weigh new and used prices, and cloud rental cost if you only need the card occasionally. Not necessarily. TDP measures power draw, not performance. A newer architecture can deliver more frames or tokens per watt, so always compare performance scores alongside power, not power alone. Used cards can offer far better value, especially previous-generation flagships. Factor in the lack of warranty and unknown wear. This tool lists both new and used reference prices so you can judge the gap. Head-to-head comparison
Spec
NVIDIA GeForce RTX 5080
NVIDIA GeForce RTX 4090
VRAM
16 GB
24 GB (winner)
Bandwidth
960 GB/s
1008 GB/s (winner)
TDP (power)
360 W (winner)
450 W
Gaming score
88/100
95/100 (winner)
AI score
82/100
96/100 (winner)
Price (new)
$1,200 (winner)
$1,900
Price (used)
$1,050 (winner)
$1,550
Cloud rent $/hr
$0.40
$0.34 (winner)
Best for
Best value, Efficiency
Gaming, AI / LLMs
Get it
GPU reference specs
GPU
VRAM
TDP
Bandwidth
Street price
Cloud $/hr
Released
NVIDIA GeForce RTX 5090
32 GB
575 W
1792 GB/s
$2,500
$0.69
2025
NVIDIA GeForce RTX 5080
16 GB
360 W
960 GB/s
$1,200
$0.40
2025
NVIDIA GeForce RTX 5070
12 GB
250 W
672 GB/s
$650
$0.25
2025
NVIDIA GeForce RTX 4090
24 GB
450 W
1008 GB/s
$1,900
$0.34
2022
NVIDIA GeForce RTX 4080
16 GB
320 W
717 GB/s
$1,100
$0.28
2022
NVIDIA GeForce RTX 4070
12 GB
200 W
504 GB/s
$550
$0.20
2023
NVIDIA GeForce RTX 3090
24 GB
350 W
936 GB/s
$900
$0.22
2020
NVIDIA GeForce RTX 3060 12GB
12 GB
170 W
360 GB/s
$280
$0.12
2021
NVIDIA A100 80GB
80 GB
400 W
2039 GB/s
$8,000
$1.10
2020
NVIDIA H100 80GB
80 GB
700 W
3350 GB/s
$25,000
$2.49
2022
AMD Radeon RX 7900 XTX
24 GB
355 W
960 GB/s
$850
$0.30
2022
Intel Arc B580
12 GB
190 W
456 GB/s
$250
N/A
2024
Frequently asked questions
How do I compare two GPUs?
Is a higher TDP GPU always faster?
Should I buy new or used when comparing GPUs?
Which should you buy?
- Gaming: the 4090 is faster overall, but the 5080’s DLSS 4 can close the gap in supported titles. For pure rasterization and 4K, the 4090 leads.
- AI: the 4090’s 24 GB vs the 5080’s 16 GB is decisive for larger models — the 4090 is the better AI card.
- Value & efficiency: the 5080 costs less and runs cooler, winning on performance per dollar and per watt.
Key differences
- VRAM: 24 GB (4090) vs 16 GB (5080) — the headline gap.
- Bandwidth: the 4090 is higher.
- Features: only the 5080 has DLSS 4 multi-frame generation.
- Price & power: the 5080 is cheaper and less power-hungry.
New, used, or cloud
If you need 24 GB for AI, a used 4090 can undercut a new 5080 while offering more memory. If you need 24 GB only occasionally, rent a 4090 in the cloud instead — see rates.
People also ask
Is the RTX 4090 still better than the 5080? In raw performance and VRAM, yes. The 5080 wins on price, efficiency, and DLSS 4, so the “better” card depends on whether you value performance/VRAM or value/features. Which is better for AI, the 5080 or 4090? The 4090, because its 24 GB of VRAM fits larger models than the 5080’s 16 GB.
Related: RTX 5080 vs RTX 4080 · RTX 5090 vs RTX 4090 · Buy vs rent for AI