G3D Mark is a standard benchmark that measures graphics performance in real-world gaming scenarios. It simplifies comparing cards from different brands, where higher scores directly correlate with better fps and smoother gaming experiences.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, raw graphics performance, VRAM, feature set, power efficiency, pricing context, and long-term value so you can see which GPU actually makes more sense.

GeForce RTX 4090 Mobile

2023

Why buy it

✅12.4% more average FPS across 50 tracked games in our benchmark data.
✅Access to DLSS 3.5 Super Resolution (2023).
✅More future proof: Ada Lovelace (2022−2024) on 4nm with a newer platform for upcoming games.
✅Draws 120W instead of 300W, a 180W reduction.

Trade-offs

❌Lower G3D Mark per dollar, at 0 vs 26.8 G3D/$ (Unknown MSRP vs $999 MSRP).

Radeon RX 6900 XT

2020

Why buy it

✅Delivers 100+% more G3D Mark for each dollar spent, at 26.8 vs 0 G3D/$ ($999 MSRP vs Unknown MSRP).

Trade-offs

❌Lower average FPS than GeForce RTX 4090 Mobile across 50 tracked games in our benchmark data.
❌No DLSS support; it relies on FSR 3 (2023) instead.
❌Weaker long-term outlook: GeForce RTX 4090 Mobile is the safer future-proof pick thanks to newer hardware and better gaming feature support.
❌150% higher power demand at 300W vs 120W.

GeForce RTX 4090 Mobile

2023

Radeon RX 6900 XT

2020

Why buy it

✅12.4% more average FPS across 50 tracked games in our benchmark data.
✅Access to DLSS 3.5 Super Resolution (2023).
✅More future proof: Ada Lovelace (2022−2024) on 4nm with a newer platform for upcoming games.
✅Draws 120W instead of 300W, a 180W reduction.

Why buy it

✅Delivers 100+% more G3D Mark for each dollar spent, at 26.8 vs 0 G3D/$ ($999 MSRP vs Unknown MSRP).

Trade-offs

❌Lower G3D Mark per dollar, at 0 vs 26.8 G3D/$ (Unknown MSRP vs $999 MSRP).

Trade-offs

❌Lower average FPS than GeForce RTX 4090 Mobile across 50 tracked games in our benchmark data.
❌No DLSS support; it relies on FSR 3 (2023) instead.
❌Weaker long-term outlook: GeForce RTX 4090 Mobile is the safer future-proof pick thanks to newer hardware and better gaming feature support.
❌150% higher power demand at 300W vs 120W.

Quick Answers

So, is GeForce RTX 4090 Mobile better than Radeon RX 6900 XT?

Yes, but this is not really about a huge raw performance gap. GeForce RTX 4090 Mobile averages 12.4% more FPS across 50 tracked games in our benchmark data. The broader synthetic picture is also very close at 27,048 vs 26,729 in G3D Mark. The bigger reason to prefer GeForce RTX 4090 Mobile is the overall package: you are getting a newer generation, DLSS 3.5 + Frame Generation, plus much lower power draw (120W vs 300W).

Which one is more future-proof for 2026 and beyond?

GeForce RTX 4090 Mobile is the more future-proof choice for 2026 and beyond. You are getting a newer 2023 generation instead of 2020, the stronger feature stack with DLSS 3.5 + Frame Generation instead of FSR 3 + AFMF, and a 4nm process instead of 7nm. That broader feature stack should age better as more games lean on modern upscaling and frame-generation support.

Which one is the smarter buy today, not just the cheaper card?

GeForce RTX 4090 Mobile is priced in an unclear MSRP range at an unclear MSRP versus $999 MSRP, and you are getting 12.4% more estimated average FPS across 50 tracked games in our benchmark data and 1.2% higher G3D Mark. Radeon RX 6900 XT still holds the G3D-per-dollar lead, so the performance win comes with a real value premium. If you are comfortable paying the premium for the stronger gaming result, GeForce RTX 4090 Mobile is the one to buy. If staying closer to budget matters more, Radeon RX 6900 XT still makes more sense on price alone and remains capable enough for modern gaming.

Is Radeon RX 6900 XT still worth buying for gaming in 2026?

Yes. Radeon RX 6900 XT is still a strong gaming GPU in 2026: it is excellent for 1080p, very strong for 1440p, and still capable at 4K with sensible settings or upscaling. This mostly comes down to price. If you want to stay closer to $999 MSRP, it remains a strong choice; if you are comfortable paying more, GeForce RTX 4090 Mobile earns that extra money with a clearly stronger gaming result and a more complete overall package.

Games Benchmarks

Real-world benchmarks and performance projections based on comprehensive hardware analysis and comparative metrics. Values represent expected performance on High/Ultra settings at 1080p, 1440p, and 4K. Modeled using a Ryzen 7 9800X3D reference profile to minimize specific CPU bottlenecks.

Note: Performance behavior can vary per game. Specific architectures may perform better or worse depending on game engine optimizations and API implementation.

GeForce RTX 4090 Mobile Benchmark Check

Radeon RX 6900 XT Benchmark Check

Path of Exile 2

Preset	GeForce RTX 4090 Mobile	Radeon RX 6900 XT
1080p
low	204 FPS	258 FPS
medium	190 FPS	235 FPS
high	163 FPS	203 FPS
ultra	149 FPS	176 FPS
1440p
low	188 FPS	242 FPS
medium	159 FPS	200 FPS
high	128 FPS	162 FPS
ultra	118 FPS	146 FPS
4K
low	123 FPS	171 FPS
medium	102 FPS	143 FPS
high	76 FPS	107 FPS
ultra	70 FPS	95 FPS

Open GeForce RTX 4090 Mobile Open Radeon RX 6900 XT

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	GeForce RTX 4090 Mobile	Radeon RX 6900 XT
1080p
low	501 FPS	601 FPS
medium	438 FPS	500 FPS
high	353 FPS	400 FPS
ultra	296 FPS	341 FPS
1440p
low	383 FPS	397 FPS
medium	332 FPS	330 FPS
high	268 FPS	271 FPS
ultra	220 FPS	221 FPS
4K
low	214 FPS	193 FPS
medium	187 FPS	162 FPS
high	159 FPS	135 FPS
ultra	131 FPS	111 FPS

Open GeForce RTX 4090 Mobile Open Radeon RX 6900 XT

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	GeForce RTX 4090 Mobile	Radeon RX 6900 XT
1080p
low	884 FPS	924 FPS
medium	735 FPS	767 FPS
high	661 FPS	683 FPS
ultra	570 FPS	585 FPS
1440p
low	697 FPS	714 FPS
medium	577 FPS	587 FPS
high	508 FPS	510 FPS
ultra	433 FPS	432 FPS
4K
low	474 FPS	498 FPS
medium	396 FPS	412 FPS
high	347 FPS	353 FPS
ultra	282 FPS	290 FPS

Open GeForce RTX 4090 Mobile Open Radeon RX 6900 XT

League of Legends

League of Legends

Valorant

Preset	GeForce RTX 4090 Mobile	Radeon RX 6900 XT
1080p
low	723 FPS	684 FPS
medium	655 FPS	565 FPS
high	573 FPS	494 FPS
ultra	528 FPS	446 FPS
1440p
low	581 FPS	563 FPS
medium	520 FPS	471 FPS
high	456 FPS	408 FPS
ultra	408 FPS	360 FPS
4K
low	400 FPS	365 FPS
medium	364 FPS	317 FPS
high	334 FPS	290 FPS
ultra	296 FPS	256 FPS

Open GeForce RTX 4090 Mobile Open Radeon RX 6900 XT

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of GeForce RTX 4090 Mobile and Radeon RX 6900 XT

GeForce RTX 4090 Mobile

The GeForce RTX 4090 Mobile is manufactured by NVIDIA. It was released in January 3 2023. It features the Ada Lovelace architecture. The core clock ranges from 1335 MHz to 1695 MHz. It has 9728 shading units. The thermal design power (TDP) is 120W. Manufactured using 4 nm process technology. It features 76 dedicated ray tracing cores for enhanced lighting effects. G3D Mark benchmark score: 27,048 points.

Radeon RX 6900 XT

The Radeon RX 6900 XT is manufactured by AMD. It was released in October 28 2020. It features the RDNA 2.0 architecture. The core clock ranges from 1825 MHz to 2250 MHz. It has 5120 shading units. The thermal design power (TDP) is 300W. Manufactured using 7 nm process technology. It features 80 dedicated ray tracing cores for enhanced lighting effects. G3D Mark benchmark score: 26,729 points. Launch price was $999.

⚡

Graphics Performance

The GeForce RTX 4090 Mobile scores 27,048 and the Radeon RX 6900 XT reaches 26,729 in the G3D Mark benchmark — just a 1.2% difference, making them near-identical in rasterization performance. The GeForce RTX 4090 Mobile is built on Ada Lovelace while the Radeon RX 6900 XT uses RDNA 2.0, both on 4 nm vs 7 nm. Shader units: 9,728 (GeForce RTX 4090 Mobile) vs 5,120 (Radeon RX 6900 XT). Raw compute: 32.98 TFLOPS (GeForce RTX 4090 Mobile) vs 23.04 TFLOPS (Radeon RX 6900 XT). Boost clocks: 1695 MHz vs 2250 MHz. Ray tracing: 76 RT cores (GeForce RTX 4090 Mobile) vs 80 (Radeon RX 6900 XT) with 304 Tensor cores.

Feature	GeForce RTX 4090 Mobile	Radeon RX 6900 XT
G3D Mark Score	27,048+1%	26,729
Architecture	Ada Lovelace	RDNA 2.0
Process Node	4 nm	7 nm
Shading Units	9728+90%	5120
Compute (TFLOPS)	32.98 TFLOPS+43%	23.04 TFLOPS
Boost Clock	1695 MHz	2250 MHz+33%
ROPs	112	128+14%
TMUs	304	320+5%
L1 Cache	9.5 MB+850%	1 MB
L2 Cache	64 MB+1500%	4 MB
Ray Tracing Cores	76	80+5%

✨

Advanced Features (DLSS/FSR)

Both GPUs support Frame Generation technologies, but they achieve it differently. The GeForce RTX 4090 Mobile uses DLSS 3.5 + Frame Generation, while the Radeon RX 6900 XT relies on FSR Frame Generation + AFMF. Both can significantly boost FPS in supported titles, but they are not on the same feature stack.The GeForce RTX 4090 Mobile gives access to NVIDIA DLSS (Deep Learning Super Sampling), widely regarding as the superior upscaling method for image quality. The Radeon RX 6900 XT relies on FSR (FidelityFX Super Resolution), which is capable but generally slightly noisier than DLSS in motion.

Feature	GeForce RTX 4090 Mobile	Radeon RX 6900 XT
Upscaling Tech	DLSS 3.5 Super Resolution	FSR 3
Frame Generation	DLSS 3.5 + Frame Generation	FSR Frame Generation + AFMF
Ray Reconstruction	Yes (DLSS 3.5)	No
Low Latency	NVIDIA Reflex	AMD Anti-Lag

💾

Video Memory (VRAM)

Both cards feature 16 GB of GDDR6. Memory bandwidth: 576 GB/s (GeForce RTX 4090 Mobile) vs 512 GB/s (Radeon RX 6900 XT) — a 12.5% advantage for the GeForce RTX 4090 Mobile. Bus width: 256-bit vs 256-bit. L2 Cache: 64 MB (GeForce RTX 4090 Mobile) vs 4 MB (Radeon RX 6900 XT) — the GeForce RTX 4090 Mobile has significantly larger on-die cache to reduce VRAM reliance.

Feature	GeForce RTX 4090 Mobile	Radeon RX 6900 XT
VRAM Capacity	16 GB	16 GB
Memory Type	GDDR6	GDDR6
Memory Bandwidth	576 GB/s+13%	512 GB/s
Bus Width	256-bit	256-bit
L2 Cache	64 MB+1500%	4 MB

🖥️

Display & API Support

DirectX support: 12.2 (GeForce RTX 4090 Mobile) vs 12 Ultimate (Radeon RX 6900 XT). Vulkan: 1.3 vs 1.3. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 1 vs 4.

Feature	GeForce RTX 4090 Mobile	Radeon RX 6900 XT
DirectX	12.2+2%	12 Ultimate
Vulkan	1.3	1.3
OpenGL	4.6	4.6
Max Displays	1	4+300%

🎬

Media & Encoding

Hardware encoder: 8th Gen NVENC (GeForce RTX 4090 Mobile) vs VCN 3.0 (Radeon RX 6900 XT). Decoder: 5th Gen NVDEC vs VCN 3.0. Supported codecs: MPEG-2,H.264,HEVC,VP9,AV1 (GeForce RTX 4090 Mobile) vs H.264,H.265/HEVC,AV1,VP9 (Radeon RX 6900 XT).

Feature	GeForce RTX 4090 Mobile	Radeon RX 6900 XT
Encoder	8th Gen NVENC	VCN 3.0
Decoder	5th Gen NVDEC	VCN 3.0
Codecs	MPEG-2,H.264,HEVC,VP9,AV1	H.264,H.265/HEVC,AV1,VP9

🔌

Power & Dimensions

The GeForce RTX 4090 Mobile draws 120W versus the Radeon RX 6900 XT's 300W — a 85.7% difference. The GeForce RTX 4090 Mobile is more power-efficient. Recommended PSU: 650W (GeForce RTX 4090 Mobile) vs 850W (Radeon RX 6900 XT). Power connectors: Mobile vs 2x 8-pin. Card length: 0mm vs 267mm, occupying 0 vs 2.5 slots. Typical load temperature: 80°C vs 80°C.

Feature	GeForce RTX 4090 Mobile	Radeon RX 6900 XT
TDP	120W-60%	300W
Recommended PSU	650W-24%	850W
Power Connector	Mobile	2x 8-pin
Length	0mm	267mm
Height	0mm	120mm
Slots	0-100%	2.5
Temp (Load)	80°C	80°C
Perf/Watt	225.4+153%	89.1