AMD Radeon RX 6900 XT vs NVIDIA RTX 5880 Ada Generation Comparison

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon RX 6900 XT leads with an average benchmark score of 50,951, while the NVIDIA RTX 5880 Ada Generation trails at 45,972. The AMD card also ranks slightly higher in percentile versus all GPUs, sitting at the 86th percentile compared to NVIDIA’s 85th.

Q: How do the two cards compare in raw compute performance?

A: The NVIDIA RTX 5880 Ada Generation delivers substantially higher FP32 throughput at 69.27 TFLOPS, versus 23.04 TFLOPS for the AMD Radeon RX 6900 XT. In the Geekbench OpenCL test, NVIDIA scores 326,898 against AMD’s 187,673, a delta of -42.6% from AMD’s perspective.

Q: Which GPU wins more head-to-head benchmarks?

A: The AMD Radeon RX 6900 XT wins 6 of the 8 head-to-head tests, including PassMark DirectX 11, DirectX 12, G2D, G3D, and GPU compute. The NVIDIA RTX 5880 Ada Generation wins only 2 tests: Geekbench OpenCL and PassMark DirectX 9.

Q: What is the memory configuration difference?

A: The NVIDIA RTX 5880 Ada Generation has 48 GB of GDDR6 memory on a 384-bit bus, delivering 864.0 GB/s bandwidth. The AMD Radeon RX 6900 XT has 16 GB of GDDR6 on a 256-bit bus, with 512.0 GB/s bandwidth. The NVIDIA card also has a higher memory clock at 2250 MHz (18 Gbps effective) versus 2000 MHz (16 Gbps effective) for AMD.

Q: Are these cards in the same performance tier according to their nearest rivals?

A: Not exactly. The AMD Radeon RX 6900 XT’s closest rival is the NVIDIA CMP 50HX, which is just 1.6% ahead, followed by the AMD Radeon RX Vega 64 at 1.9% behind. The NVIDIA RTX 5880 Ada Generation’s nearest rival is the NVIDIA RTX A2000, which is 0.2% behind, and the Intel Arc A730M at 0.8% behind.

Q: What is the production status and release timeframe?

A: The AMD Radeon RX 6900 XT is end-of-life and was released on 2020-10-27. The NVIDIA RTX 5880 Ada Generation is active and was released on 2024-01-04.

Where Each One Wins

The AMD Radeon RX 6900 XT dominates the older DirectX API benchmarks. In PassMark DirectX 12, it scores 113 versus 70 for NVIDIA, a commanding 61.4% advantage. DirectX 11 shows a similar pattern: AMD leads 279 to 228, a 22.4% margin. Even in DirectX 10, both cards tie at 167, but the tie is awarded to AMD per the data. For legacy 2D workloads, AMD’s PassMark G2D score of 1055 is 35.8% higher than NVIDIA’s 777.

The NVIDIA RTX 5880 Ada Generation wins decisively in compute-oriented tasks. Its Geekbench OpenCL score of 326,898 dwarfs AMD’s 187,673 by 74.2%. It also takes the PassMark DirectX 9 test with 335 points versus 268 for AMD, a 20% margin. These wins suggest NVIDIA’s card is built for compute-heavy, workstation-style loads rather than gaming-era API tests.

The two cards are closely matched in overall 3D performance. The AMD Radeon RX 6900 XT edges out NVIDIA in PassMark G3D with 26,732 versus 25,096, a 6.5% lead. In GPU compute, AMD’s 14,547 is just 2.4% ahead of NVIDIA’s 14,208. The AMD card’s 6-2 win record in head-to-head tests reflects its strength across a broad set of legacy and synthetic workloads, while NVIDIA’s wins point to modern compute acceleration.

Architecture Differences

The AMD Radeon RX 6900 XT is built on the RDNA 2.0 architecture, using the Navi 21 chip on a 7 nm TSMC process. It packs 26,800 million transistors into a 520 mm² die, yielding a transistor density of 51.5M per mm². The NVIDIA RTX 5880 Ada Generation uses the Ada Lovelace architecture with the AD102 chip on a 5 nm TSMC process. Its 76,300 million transistors are spread across a larger 609 mm² die, but the density jumps to 125.3M per mm².

The NVIDIA card features 110 RT cores and 440 tensor cores, while the AMD card has 80 RT cores and no tensor core listing. This tensor core presence gives NVIDIA a clear advantage for AI-accelerated workloads. The shading unit count also differs dramatically: 14,080 for NVIDIA versus 5,120 for AMD. Texture mapping units and ROPs follow suit, with NVIDIA at 440 TMUs and 176 ROPs versus AMD’s 320 TMUs and 128 ROPs.

The FP16 capability separates the two as well. NVIDIA delivers 69.27 TFLOPS FP16 with a 1:1 ratio to FP32, meaning there is no penalty for half-precision work. AMD’s FP16 is 46.08 TFLOPS, but that is at a 2:1 ratio, implying it is processed at half rate. This architectural choice matters for scientific and machine learning tasks that rely on FP16 throughput.

Specification Differences

The process node is the first major split: 7 nm for AMD versus 5 nm for NVIDIA. This contributes to the NVIDIA card’s higher transistor count and density. Memory capacity is tripled on NVIDIA’s side: 48 GB versus 16 GB. The bus width expands from 256-bit to 384-bit, and bandwidth rises from 512.0 GB/s to 864.0 GB/s.

Clock speeds differ in interesting ways. The AMD Radeon RX 6900 XT has a higher base clock at 1825 MHz versus 975 MHz for NVIDIA. But the boost clock tells a different story: NVIDIA leads at 2460 MHz versus 2250 MHz for AMD. The AMD card also lists a "game" clock of 2015 MHz, which NVIDIA does not provide.

Power and physical design differ. The AMD card consumes 300 W TDP and requires a 700 W PSU, with two 8-pin connectors and a triple-slot width. The NVIDIA card uses 285 W TDP, needs a 600 W PSU, has a single 16-pin connector, and fits in a dual-slot form factor. Both use PCIe 4.0 x16. Display outputs diverge: AMD offers 1x HDMI 2.1, 2x DisplayPort 1.4a, and 1x USB Type-C, while NVIDIA provides 4x DisplayPort 1.4a. Dimensions are nearly identical in length at 267 mm, but AMD is taller (120 mm vs 112 mm) and lists a 50 mm width that NVIDIA does not specify.

Head-to-Head Benchmarks

The largest single-test victory belongs to NVIDIA in Geekbench OpenCL. NVIDIA’s 326,898 score eclipses AMD’s 187,673 by 74.2% (a -42.6% delta from AMD’s perspective). This is a massive compute gap that aligns with NVIDIA’s higher FP32 and FP16 throughput. For compute-heavy applications, this is the defining metric.

AMD’s biggest win comes in PassMark DirectX 12, where its 113 score beats NVIDIA’s 70 by 61.4%. This is a stark reversal from the compute results. In PassMark DirectX 11, AMD leads 279 to 228, a 22.4% margin. The G2D test shows AMD ahead 1055 to 777, a 35.8% advantage.

The other tests are closer. PassMark G3D has AMD at 26,732 versus NVIDIA’s 25,096, a 6.5% lead. PassMark GPU compute shows AMD at 14,547 versus 14,208, a slim 2.4% edge. DirectX 10 is a perfect tie at 167, with the win credited to AMD per the data. NVIDIA’s only other win is DirectX 9, where its 335 beats AMD’s 268 by 20%.

The pattern is clear: NVIDIA wins modern compute and legacy DirectX 9, while AMD sweeps the newer DirectX APIs and 2D tests. The DirectX 12 result is particularly notable, as it suggests AMD’s architecture handles low-level API overhead more efficiently in synthetic benchmarks.

The Verdict

The data points to two distinct use cases. The NVIDIA RTX 5880 Ada Generation is the clear choice for compute-bound workloads, as evidenced by its 74.2% lead in Geekbench OpenCL. Its 48 GB memory capacity and 1:1 FP16 ratio make it suitable for large datasets and AI inference. This is a workstation card for professionals who need raw throughput.

The AMD Radeon RX 6900 XT wins the gaming and legacy API battle. Its 61.4% lead in DirectX 12 and 22.4% lead in DirectX 11 suggest better optimization for modern gaming APIs. The 6-2 head-to-head record and higher average benchmark score (50,951 vs 45,972) reinforce its strength in synthetic 3D workloads.

For gamers, the AMD card’s wins in G3D and DirectX 12 make it the more sensible pick. For compute professionals, NVIDIA’s OpenCL dominance and triple memory capacity are decisive. The AMD card’s 86th percentile ranking versus NVIDIA’s 85th is close, but the underlying test distribution tells a more nuanced story. The verdict depends entirely on whether the workload is rasterization or compute — the data does not support a single universal winner.