AMD Radeon RX 7800 XT vs NVIDIA GeForce GTX 780M Comparison

The AMD Radeon RX 7800 XT and the NVIDIA GeForce GTX 780M represent two distinct eras of graphics hardware, separated by a decade of architectural evolution. The data shows a decisive performance gap, but the comparison is not purely about raw speed; it also highlights fundamental shifts in process technology, memory design, and feature support. This analysis examines the benchmark results, architectural differences, and specification changes between these two GPUs.

Head-to-Head Benchmarks

The head-to-head data is limited to two shared benchmark tests, both of which result in a clear victory for the AMD Radeon RX 7800 XT. In the Geekbench OpenCL test, the RX 7800 XT scores 18,290, while the GTX 780M scores 12,769. This represents a 43.2% advantage for the AMD part, a substantial margin that reflects the generational leap in compute throughput.

The Geekbench Vulkan test reveals an even more dramatic disparity. The RX 7800 XT achieves a score of 54,228, compared to the GTX 780M's 12,696. This translates to a 327.1% delta, meaning the AMD card is over four times faster in this specific API workload. The magnitude of this difference is not merely incremental; it indicates that the RX 7800 XT is operating in a completely different performance class, likely due to its modern architecture's superior handling of Vulkan's low-level overhead and parallel workload distribution.

Looking at the broader benchmark picture, the RX 7800 XT's average benchmark score across all tests is 11,627, while the GTX 780M's is 11,261. The RX 7800 XT also holds a 51st percentile ranking versus the GTX 780M's 50th percentile among all GPUs. While the head-to-head tests show a massive win for AMD, the overall average scores are surprisingly close. This is because the RX 7800 XT's benchmark suite includes older DirectX tests where its score is notably lower (e.g., Passmark DirectX 9 at 304, DirectX 10 at 121), which pulls down its average. The GTX 780M, with only three Geekbench results, has a more consistent but lower overall profile. The RX 7800 XT's nearest rivals in the database include the NVIDIA GeForce GTX 1660 (average score 11,680, a -0.5% delta) and the AMD Radeon RX 6500 XT (average score 11,842, a -1.8% delta), showing its average is competitive with those cards. The GTX 780M's nearest rivals include the AMD Radeon Pro WX 3200 (11,228, 0.3% delta) and the NVIDIA RTX PRO 6000 Blackwell Max-Q (11,088, 1.6% delta), placing its average performance in a similar tier.

The Verdict

From the data, the choice is unambiguous for any user prioritizing modern performance. The AMD Radeon RX 7800 XT is the superior product in every direct comparison available. Its 43.2% lead in OpenCL and 327.1% lead in Vulkan are decisive, making it the only sensible option for gaming, content creation, or compute tasks that leverage these APIs. The GTX 780M, being an end-of-life mobile part from 2013, cannot compete with the RDNA 3.0 architecture's efficiency and raw power.

However, the data also shows that the GTX 780M is not without its niche. Its average benchmark score of 11,261 places it within 3.3% of the RX 7800 XT's average of 11,627. This suggests that in legacy applications or workloads that do not utilize modern APIs, the performance gap narrows considerably. For a user whose primary concern is running older software on a portable device, the GTX 780M's 122 W TDP and lack of external power connectors could be a significant advantage. The RX 7800 XT, with a 263 W TDP and requiring a 600 W power supply, is a desktop-class component that demands a robust platform. The verdict is simple: the RX 7800 XT is for those who need maximum modern performance; the GTX 780M is for those constrained to a legacy mobile platform where its lower power draw is a necessity.

Architecture Differences

The architectural gap between these two GPUs is vast, representing a full decade of evolution. The AMD Radeon RX 7800 XT is built on the RDNA 3.0 architecture, using the Navi 32 chip with a codename of "Wheat Nas." In contrast, the NVIDIA GeForce GTX 780M is based on the Kepler architecture, utilizing the GK104 chip. This fundamental difference dictates nearly every other aspect of their design.

The process node is a primary differentiator. The RX 7800 XT is fabricated on a 5 nm process at TSMC, while the GTX 780M uses a 28 nm process, also from TSMC. This allows the RX 7800 XT to pack 28,100 million transistors onto a 346 mm² die, yielding a transistor density of 81.2 million per mm². The GTX 780M, by comparison, has only 3,540 million transistors on a 294 mm² die, resulting in a density of 12.0 million per mm². This means the RX 7800 XT has nearly eight times the transistor density, enabling far more complex compute units and features.

Feature support also diverges sharply. The RX 7800 XT includes 60 dedicated ray tracing cores, a feature entirely absent from the GTX 780M (its RT core count is null). Furthermore, the RX 7800 XT supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, whereas the GTX 780M is limited to DirectX 12 (11_0) and Vulkan 1.2.175. The RX 7800 XT's FP16 performance is listed as 37.32 TFLOPS (1:1), while the GTX 780M has no listed FP16 capability, suggesting it lacks the specialized hardware for efficient half-precision compute. These architectural differences explain the massive performance delta in the Vulkan benchmark and underscore the RX 7800 XT's readiness for modern workloads.

Specification Differences

The specification sheets reveal stark contrasts in nearly every category. The most obvious difference is in memory configuration. The AMD Radeon RX 7800 XT features 16 GB of GDDR6 memory on a 256-bit bus, delivering a bandwidth of 624.1 GB/s. The NVIDIA GeForce GTX 780M is equipped with only 4 GB of GDDR5 memory, also on a 256-bit bus, but with a significantly lower bandwidth of 160.0 GB/s. This 4x difference in bandwidth is critical for high-resolution textures and compute tasks.

The compute unit counts also differ dramatically. The RX 7800 XT has 3,840 shading units, 240 texture mapping units (TMUs), and 96 ROPs. The GTX 780M has 1,536 shading units, 128 TMUs, and 32 ROPs. Consequently, the pixel rate is 233.3 GPixel/s for the RX 7800 XT versus 25.50 GPixel/s for the GTX 780M, and the texture rate is 583.2 GTexel/s versus 102.0 GTexel/s. The FP32 compute performance is 37.32 TFLOPS for the AMD card versus 2.448 TFLOPS for the NVIDIA card, a 15-fold difference that explains the OpenCL benchmark results.

Clock speeds and power profiles are equally contrasting. The RX 7800 XT has a base clock of 1295 MHz and a boost clock of 2430 MHz, with a TDP of 263 W. The GTX 780M operates at a base clock of 771 MHz and a boost clock of 797 MHz, with a TDP of 122 W. The RX 7800 XT requires dual 8-pin power connectors and a 600 W suggested PSU, while the GTX 780M is an MXM module with no power connectors, drawing power directly from the laptop motherboard. The RX 7800 XT is a dual-slot desktop card with a length of 267 mm, while the GTX 780M has no listed dimensions, being a portable device component. The RX 7800 XT was released in 2023 and is still in active production, whereas the GTX 780M was released in 2013 and is end-of-life.

FAQ

Q: Which GPU is faster in the Geekbench Vulkan test?

A: The AMD Radeon RX 7800 XT is significantly faster, scoring 54,228 compared to the NVIDIA GeForce GTX 780M's 12,696, a 327.1% advantage.

Q: What is the average benchmark score difference between the two cards?

A: The AMD Radeon RX 7800 XT has an average score of 11,627, while the NVIDIA GeForce GTX 780M has an average of 11,261, making the AMD card approximately 3.3% higher on average.

Q: How much memory does each GPU have?

A: The AMD Radeon RX 7800 XT has 16 GB of GDDR6 memory, while the NVIDIA GeForce GTX 780M has 4 GB of GDDR5 memory.

Q: What are the TDPs of the two GPUs?

A: The AMD Radeon RX 7800 XT has a TDP of 263 W, while the NVIDIA GeForce GTX 780M has a TDP of 122 W.

Q: Does the AMD Radeon RX 7800 XT support ray tracing?

A: Yes, the data lists 60 ray tracing cores for the RX 7800 XT, while the GTX 780M has no ray tracing cores listed.

Q: What is the process node for each GPU?

A: The AMD Radeon RX 7800 XT is built on a 5 nm process, and the NVIDIA GeForce GTX 780M is built on a 28 nm process.