GA102
RTX 3090
Representative tracked offer: NVIDIA GeForce RTX 3090 Founders Edition
24GB VRAMPerf: 1170350W
Relative Value35balanced preset
RTX 3090 vs RX 6900 XT — value comparison
AMD
RX 6900 XT
Representative tracked offer: Sapphire TOXIC RX 6900 XT Extreme Edition
16GB VRAMPerf: 1100430W
Relative Value31balanced preset
RTX 3090 shows higher Relative Value under balanced weights at the current dataset offers: 35 vs 31. The result crosses over if RX 6900 XT reaches about $1693 or below.
Price data · US · USD · New · A 2026-08-23 · B 2026-08-23Coverage · 3 tracked new-offer records across both modelsBenchmark confidence · no estimate flags on these two recordsAffiliate links · We may earn a commission from these links. Scores are calculated separately using our methodology.
Checking today's prices… This shared scoring frame includes an offer with a 24-hour freshness window, so price-derived results finish loading in your browser a moment from now. Capability, performance and verified specifications are already final.
02 · Decision matrix
One decision, three separate questions
Capability ignores price. Relative Value adds the current dataset offers and your priorities. Keeping them separate prevents a cheap product from being mistaken for the faster product.
The decision, split by questioncapability · value · price are separate answers
Capability by task
| Scenario | RTX 3090 | RX 6900 XT |
|---|---|---|
| 1080p Gaming | S#13 | S#15 |
| 1440p Gaming | A#13 | A#15 |
| 4K / VR | B#13 | B#15 |
| Ray Tracing @ 2K (1440p) | B#12✓ | C#20 |
| AI / Local LLM | A#8✓ | D#38 |
| 3D Rendering | B#11✓ | C#26 |
| Light Use & Efficiency | D#43 | D#46 |
RTX 3090 grades higher in 3 of 7 graded scenarios (4 tied) and is never graded lower. These are the same S–F grades as the tier list — capability only, price excluded. The value rows below add prices from the 2026-08-23 offer frame. How tiers are assigned →
Relative Value by priority
Balancedhigher relative value lit
35 ✓
31
1080p Budgetpractically even (≤3 pts)
23
20
1440p Sweet Spothigher relative value lit
30 ✓
25
4K Ultra / VRhigher relative value lit
31 ✓
24
Ray Tracing (1440p)higher relative value lit
25 ✓
20
AI / LLMhigher relative value lit
24 ✓
3
Both products are normalized within the same in-stock market frame per preset. A check marks the higher Relative Value; a difference of 3 points or less is shown as practically even.
Crossover price is loading. The switch-over point and Strong Value threshold appear as soon as today's offer snapshots are confirmed in your browser.
03 · Price crossover
The price changes the answer
Current offers, crossover points and Strong Value thresholds answer different questions. Thresholds are calculations, not price forecasts.
A · RTX 3090
- Current dataset offer · NewUS · USD · snapshot 2026-08-23
- $1935
- Beats RX 6900 XT atbalanced weights; rival offer held fixed
- $2341
- Strong Value at80+ Relative Value threshold
- $596
B · RX 6900 XT
- Current dataset offer · NewUS · USD · snapshot 2026-08-23
- $2049
- Beats RTX 3090 atbalanced weights; rival offer held fixed
- $1693
- Strong Value at80+ Relative Value threshold
- $521
04 · Capability
Capability indexes, side by side
Price is intentionally excluded here so the more capable product and the better-value product cannot be confused.
Raster performance
1170
1100
1100
Ray tracing
929
827
827
AI (FP16 tensor)
1224
198
198
A · RTX 3090B · RX 6900 XTGPU indexes share one 1000-point scale (RTX 4070 = 1000).RTX 3090 shows higher Value under every weighting we test — a stable result in the 2026-08-23 offer frame.
05 · Platform & ownership
Fit, compatibility and ownership context
Only verified structured fields are shown. Physical fit, connectors, cooling and typical warranty belong to the representative tracked partner card named in each column; other board variants can differ.
A · RTX 3090
- Representative offer variantNVIDIA GeForce RTX 3090 Founders Edition
- Host interfacePCIe 4.0 x16
- Suggested PSU750 W
- Power connectors1x 12-pin
- Card length267 mm
- Expansion slots2-slot
- Coolingair
- Display outputs1× HDMI · 3× DisplayPort
B · RX 6900 XT
- Representative offer variantSapphire TOXIC RX 6900 XT Extreme Edition
- Host interfacePCIe 4.0 x16
- Suggested PSU800 W
- Power connectors1x 6-pin + 2x 8-pin
- Card length270 mm
- Expansion slots2-slot
- Coolingair
- Display outputs1× HDMI · 3× DisplayPort
- Warranty (typical new)24 mo
3-year electricity model
Over 3 years at 4h/day and $0.15/kWh, RTX 3090 (350 W) adds about $115 in modeled electricity and RX 6900 XT (430 W) about $141. The modeled difference is roughly $26. This uses rated power as a common comparison input, not a promise of wall-power consumption.
06 · Specifications
Key specifications
Reference-GPU fields and representative-offer fields are labelled separately. Directional checkmarks appear only where more or less has a clear meaning; they are not an overall verdict.
| Specification | RTX 3090 | RX 6900 XT |
|---|---|---|
| Architecture | Ampere | RDNA 2.0 |
| VRAM | 24 GB✓ | 16 GB |
| Memory type | GDDR6X | GDDR6 |
| Memory bus | 384-bit✓ | 256-bit |
| Host interface | PCIe 4.0 x16 | PCIe 4.0 x16 |
| Boost clock | 1,695 MHz | 2,525 MHz |
| Board power (lower is better) | 350 W✓ | 430 W |
| Suggested PSU (representative offer) | 750 W | 800 W |
| Power connectors (representative offer) | 1x 12-pin | 1x 6-pin + 2x 8-pin |
| Card length (representative offer) | 267 mm✓ | 270 mm |
| Warranty (representative offer) | not tracked | 24 mo |
| Current dataset offer · New | $1935snapshot 2026-08-23✓ | $2049snapshot 2026-08-23 |
Show additional verified specifications
| Specification | RTX 3090 | RX 6900 XT |
|---|---|---|
| Process node | 8 nm | 7 nm |
| Base clock | 1,395 MHz | 2,200 MHz |
| Memory data rate | 19.5 Gbps | 16 Gbps |
| Expansion slots (representative offer) | 2-slot | 2-slot |
| Cooling fans (representative offer) | 2 | 3 |
| Display outputs (representative offer) | 1× HDMI · 3× DisplayPort | 1× HDMI · 3× DisplayPort |
| Cooling type (representative offer) | air | air |
“Not tracked” means the source data does not contain a verified value; no default or guessed specification is substituted.
07 · Customize
Try other models and your own priorities
Presets are starting points. Swap either side, then open Advanced weights only if you want to tune the formula directly.
08 · Alternative
A third option worth checking
The same scenario and market frame checks whether another currently priced model offers a cleaner trade-off.
Worth considering instead
RTX 5080 — same S-tier capability for 1080p Gaming, about $385 cheaper · Value 60.
Neither of the two above is the only answer — this one clears the same bar for less. ⇄ Compare all three
A price-aware third suggestion appears once today's offer snapshots are confirmed in your browser.
09 · Decision guide
Choose based on the trade-off you actually want
These are evidence-linked conditions, not universal buying verdicts. Feature ecosystems, software support and platform preferences remain your call.
Choose A · RTX 3090 if…
- You prioritize Ray Tracing, AI / Local LLM, 3D Rendering — it earns the higher capability tier in those tracked scenarios.
- Your priorities resemble Balanced, 1440p Sweet Spot, 4K Ultra / VR — it has higher Relative Value under those presets at the snapshot offers.
- Lower rated power matters: 350 W versus 430 W for RX 6900 XT.
- You can find it at or below its Strong Value threshold of $596 under balanced weights.
Choose B · RX 6900 XT if…
- You can find it at or below its Strong Value threshold of $521 under balanced weights.
10 · Methodology & FAQ
Read the methodology →How to read this comparison
The formula is a linear weighted sum inside the current comparison frame. Capability, price and user priorities stay visible as separate inputs so the result can be challenged and changed.
- Which is better value right now: RTX 3090 or RX 6900 XT?
- Under the balanced preset and the 2026-08-23 offer frame, RTX 3090 has higher Relative Value under this configuration (35 vs 31). Value is price-dependent and moves with your weighting; capability is a separate question, answered by the tier table.
- Which one is more capable, ignoring price?
- RTX 3090 grades higher in 3 of 7 graded scenarios (4 tied) and is never graded lower.
- At what price does the RX 6900 XT become the better value?
- Holding the RTX 3090 offer dated in the 2026-08-23 frame fixed, the calculation flips in favour of the RX 6900 XT at roughly $1693 or below (balanced preset). Not a price forecast.
- Where can I compare current offers for both?
- Dated offer snapshots for both models are listed on their product pages (linked above); the interactive calculator recalculates both with your own weights and budget.
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Offer frame: 2026-08-23 · dataset generated 2026-08-23 · formula gpu-value-v1.4-benefit-cost-product · Value Score is an estimate based on our current dataset, selected weights, market prices and methodology — not an official product rating or a price forecast. Target prices are calculation thresholds, not predictions. Methodology · Report a data error