AMD Radeon RX 7900 XTX vs NVIDIA T400 Comparison

The Verdict

The data in this comparison is unambiguous. The AMD Radeon RX 7900 XTX is in a completely different performance class than the NVIDIA T400. Across the two shared head-to-head benchmarks, the RX 7900 XTX wins both, with a 196.2% lead in Geekbench OpenCL and a 435.9% lead in Geekbench Vulkan. The T400 does not win a single recorded test.

The RX 7900 XTX is the choice for anyone running compute-heavy workloads, modern game engines, or graphics applications that demand high throughput. Its average benchmark score of 19410 places it in the 64th percentile of all GPUs in the database. The T400, with an average score of 16508, sits just below at the 60th percentile. That gap matters: the RX 7900 XTX delivers roughly 17.6% higher average performance across all recorded tests.

The NVIDIA T400, however, is not without a role. Its 30 W TDP and single-slot design make it suitable for basic display output, legacy workstation tasks, or systems where space and power are extremely constrained. But the benchmark data does not support using it for anything beyond that. The RX 7900 XTX is the only defensible pick for performance-oriented workloads.

Architecture Differences

The two cards come from completely different design philosophies and generations. The AMD Radeon RX 7900 XTX uses the Navi 31 chip built on RDNA 3.0 architecture, fabricated on a 5 nm process at TSMC. The NVIDIA T400 uses the TU117 chip, a Turing architecture part built on a 12 nm process, also at TSMC. The process gap is large: 5 nm versus 12 nm. That directly explains the transistor density difference, 109.1M per mm² for the RX 7900 XTX versus 23.5M per mm² for the T400.

The chip sizes tell the story as well. The RX 7900 XTX has a die size of 529 mm² and houses 57,700 million transistors. The T400 has a 200 mm² die with just 4,700 million transistors. That is a 12x difference in transistor count on a die that is 2.6x larger.

Memory configurations are equally divergent. The RX 7900 XTX ships with 24 GB of GDDR6 on a 384 bit bus, delivering 960.0 GB/s of bandwidth. The T400 has 2 GB of GDDR6 on a 64 bit bus, with 80.00 GB/s of bandwidth. The RX 7900 XTX has 12x the memory capacity and 12x the bandwidth.

The compute resources are not comparable. The RX 7900 XTX has 6144 shading units, 384 TMUs, and 192 ROPs, plus 96 ray tracing cores. The T400 has 384 shading units, 24 TMUs, and 16 ROPs, with no ray tracing cores at all. The RX 7900 XTX also supports DirectX 12 Ultimate (12_2), while the T400 is limited to DirectX 12 (12_1). Both support OpenGL 4.6 and Vulkan 1.4.

Clock speeds and power draw reinforce the positioning. The RX 7900 XTX runs at a 1929 MHz base clock and 2498 MHz boost clock, with a 355 W TDP and dual-slot cooler requiring 2x 8-pin power connectors and a 750 W PSU. The T400 runs at a 420 MHz base and 1425 MHz boost, with a 30 W TDP, single-slot design, no power connectors, and a 200 W PSU suggestion. The interface also differs: PCIe 4.0 x16 for the RX 7900 XTX versus PCIe 3.0 x16 for the T400.

Where Each One Wins

The RX 7900 XTX wins everywhere the data records performance. In Geekbench OpenCL, it scores 50465 against 17039 for the T400. In Geekbench Vulkan, it scores 85612 against 15976. Those are the only two benchmarks both cards share, and the RX 7900 XTX dominates both.

The RX 7900 XTX has additional recorded benchmarks that the T400 does not appear in at all. In 3DMark Steel Nomad DX12, it scores 6841. In Passmark, it posts 31238 in G3D, 17689 in GPU compute, 1267 in G2D, 356 in DirectX 11, 330 in DirectX 9, 166 in DirectX 10, and 131 in DirectX 12. Those results show a card that is balanced across API generations and compute workloads.

The T400 has no wins in any recorded category. Its only strengths are physical and power related: it is a single-slot card with no power connectors, a 30 W TDP, and a 200 W PSU suggestion. For a system builder needing basic graphics output in a low-power chassis, that profile has value. But in raw performance, the data shows no contest.

The use-case split is therefore simple. The RX 7900 XTX is for rendering, gaming, GPU compute, and any workload where throughput matters. The T400 is for display-only systems, legacy applications, or constrained environments where the RX 7900 XTX's 355 W TDP, dual-slot size, and 287 mm length would not fit.

FAQ

Q: Which GPU is faster in the shared benchmarks?

A: The AMD Radeon RX 7900 XTX wins both shared tests. It leads by 196.2% in Geekbench OpenCL and by 435.9% in Geekbench Vulkan.

Q: How do their average benchmark scores compare?

A: The RX 7900 XTX has an average benchmark score of 19410, putting it in the 64th percentile of all GPUs. The NVIDIA T400 has an average score of 16508, in the 60th percentile.

Q: Does the NVIDIA T400 support ray tracing?

A: No. The T400 has no ray tracing cores listed in its specifications. The RX 7900 XTX has 96 ray tracing cores.

Q: What are the memory specifications of each card?

A: The RX 7900 XTX has 24 GB of GDDR6 on a 384 bit bus with 960.0 GB/s bandwidth. The T400 has 2 GB of GDDR6 on a 64 bit bus with 80.00 GB/s bandwidth.

Q: Which card is more power efficient?

A: The NVIDIA T400 has a 30 W TDP and requires no power connectors, with a 200 W PSU suggestion. The RX 7900 XTX has a 355 W TDP, requires 2x 8-pin power connectors, and a 750 W PSU suggestion.

Q: Are there benchmarks where the T400 wins?

A: No. In the recorded head-to-head data, the T400 wins zero tests. The RX 7900 XTX wins both.

Head-to-Head Benchmarks

The two shared benchmarks paint a stark picture. In Geekbench OpenCL, the RX 7900 XTX scores 50465 while the T400 scores 17039. That is a delta of 196.2%, meaning the AMD card delivers nearly triple the OpenCL performance. The gap is even larger in Geekbench Vulkan: 85612 versus 15976, a 435.9% delta. The RX 7900 XTX is more than five times faster in that test.

These results align with the underlying hardware. The RX 7900 XTX has 6144 shading units versus 384, 96 ray tracing cores versus none, and 960.0 GB/s of memory bandwidth versus 80.00 GB/s. The Vulkan score gap is particularly notable because Vulkan tends to scale well with shading unit count and bandwidth, both of which heavily favor the AMD card.

The RX 7900 XTX's additional benchmark results provide context for its average score. Its 3DMark Steel Nomad DX12 score of 6841 shows strong modern API performance. Its Passmark G3D score of 31238 and GPU compute score of 17689 indicate that the card is not a one-trick pony; it sustains high throughput across different test methodologies and API generations.

The T400's recorded performance is limited to the two Geekbench tests. Its OpenCL score of 17039 and Vulkan score of 15976 are consistent with a low-power Turing part. The nearest rivals for the T400 in the database include the NVIDIA GeForce RTX 5090 D V2 with an average score of 16504 and a delta of 0%, the AMD Radeon PRO W7500 at 16415 with a 0.6% delta, the NVIDIA RTX PRO 6000 Blackwell at 16408 with a 0.6% delta, and the AMD Radeon RX 5700 XT at 16361 with a 0.9% delta. All of those cards are within 0.9% of the T400, showing that its average score of 16508 sits in a tightly clustered performance band.

The RX 7900 XTX's nearest rivals are similarly close. The NVIDIA GeForce GTX 1060 3 GB has an average score of 19334, just 0.4% behind. The NVIDIA Quadro K5200 scores 19602, 1% ahead. The AMD FirePro D300 scores 19637, 1.2% ahead. The NVIDIA TITAN Xp scores 19177, 1.2% behind. The RX 7900 XTX's average of 19410 places it right in the middle of that group.

What the data does not show is any scenario where the T400 competes with the RX 7900 XTX. The two cards do not share a performance tier, a power envelope, or a memory configuration. The RX 7900 XTX is an end-of-life high-end part from the Radeon RX 7000 series. The T400 is an end-of-life entry-level workstation card from the Quadro Turing generation. Their paths cross only in the sense that both are AMD and NVIDIA products with recorded database entries.

For a buyer choosing between these two, the decision is entirely workload dependent. If the task is compute, rendering, or modern gaming, the RX 7900 XTX is the only option with any performance justification. If the task is basic display output in a system that cannot accommodate a 355 W dual-slot card, the T400 is the only option that fits. The benchmark data does not support any middle ground.