AMD Radeon RX 6750 XT vs NVIDIA GeForce GTX 780 Ti Comparison

The AMD Radeon RX 6750 XT and the NVIDIA GeForce GTX 780 Ti represent two distinctly different eras of GPU design, separated by nearly a decade of architectural evolution. The data shows a generational chasm in raw compute and API support, yet the older card still manages to secure a surprising win in one specific workload. This analysis compares the two based on benchmark results, architectural differences, and specification sheets.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon RX 6750 XT holds a higher average benchmark score of 26011 compared to the NVIDIA GeForce GTX 780 Ti’s 24236. This places the RX 6750 XT at the 71st percentile of all GPUs, while the GTX 780 Ti sits just behind at the 70th percentile.

Q: How does the RX 6750 XT perform in the Geekbench Metal test?

A: The RX 6750 XT delivers a Geekbench Metal score of 137249, which is 656.4% higher than the GTX 780 Ti’s 18144. This is the single largest performance gap in the head-to-head results.

Q: Is there any benchmark where the GTX 780 Ti wins?

A: Yes, in Geekbench OpenCL, the GTX 780 Ti scores 27326, which is 40.1% higher than the RX 6750 XT’s 16360. This is the only test in the head-to-head data where the NVIDIA card comes out ahead.

Q: What is the difference in VRAM capacity between the two cards?

A: The AMD Radeon RX 6750 XT features 12 GB of GDDR6 memory on a 192-bit bus, while the NVIDIA GeForce GTX 780 Ti has 3 GB of GDDR5 memory on a 384-bit bus. The RX 6750 XT’s memory bandwidth is 432.0 GB/s, compared to 336.6 GB/s for the GTX 780 Ti.

Q: Which GPU has a higher transistor count?

A: The RX 6750 XT uses 17,200 million transistors on a 7 nm process (TSMC), resulting in a die size of 335 mm². The GTX 780 Ti uses 7,080 million transistors on a 28 nm process, with a much larger die size of 561 mm².

Q: Do both cards support the same PCIe interface?

A: No, the RX 6750 XT uses PCIe 4.0 x16, while the GTX 780 Ti uses the older PCIe 3.0 x16 standard. This reflects the generational difference in platform requirements.

Architecture Differences

The architectural divide between these two GPUs is profound. The AMD Radeon RX 6750 XT is built on the RDNA 2.0 architecture, fabricated on TSMC’s 7 nm process node. It utilizes the Navi 22 chip, packing 17,200 million transistors into a 335 mm² die. This results in a transistor density of 51.3M per mm². In contrast, the NVIDIA GeForce GTX 780 Ti uses the Kepler architecture, built on a 28 nm process with the GK110B chip. It contains 7,080 million transistors spread across a much larger 561 mm² die, yielding a density of only 12.6M per mm². The difference in manufacturing technology explains the massive disparity in transistor density and efficiency.

The RX 6750 XT is a modern design with 40 dedicated ray tracing cores, a feature entirely absent from the GTX 780 Ti. The AMD card also supports DirectX 12 Ultimate (12_2), while the NVIDIA card is limited to DirectX 12 (11_1). Vulkan support also differs, with the RX 6750 XT supporting version 1.4 compared to the GTX 780 Ti’s 1.2.175. The shader architecture also reflects the generational gap: the RX 6750 XT has 2560 shading units, 160 TMUs, and 64 ROPs, while the GTX 780 Ti has 2880 shading units, 240 TMUs, but only 48 ROPs. Despite having more shading units and TMUs, the GTX 780 Ti’s older architecture cannot match the per-clock efficiency of RDNA 2.0.

The memory subsystems are radically different as well. The RX 6750 XT uses 12 GB of GDDR6 memory with a 192-bit bus, achieving 432.0 GB/s of bandwidth. The GTX 780 Ti uses 3 GB of GDDR5 memory on a wider 384-bit bus, but only reaches 336.6 GB/s. The clock speeds also tell the story: the RX 6750 XT has a base clock of 2150 MHz and a boost clock of 2600 MHz, while the GTX 780 Ti operates at 875 MHz base and 928 MHz boost. These clock differences, combined with the architectural advantages, explain the massive performance deltas in most benchmarks.

Where Each One Wins

The benchmark data paints a clear picture of where each GPU excels. The AMD Radeon RX 6750 XT is the dominant performer in modern, compute-heavy workloads. Its Geekbench Metal score of 137249 is more than seven times that of the GTX 780 Ti, indicating a massive advantage in Apple’s Metal API environment. Similarly, in Geekbench Vulkan, the RX 6750 XT scores 98089, which is 260.1% higher than the GTX 780 Ti’s 27238. This suggests the RX 6750 XT is far better suited for modern games and applications that leverage Vulkan’s low-level access to the hardware.

The NVIDIA GeForce GTX 780 Ti, despite its age, wins in Geekbench OpenCL with a score of 27326, beating the RX 6750 XT’s 16360 by 40.1%. This is an interesting anomaly, as OpenCL is often used in compute tasks like video encoding and scientific simulations. The GTX 780 Ti’s higher shading unit count (2880) and TMU count (240) may contribute to this result, though the Kepler architecture’s raw throughput in this specific API apparently outperforms the RDNA 2.0 card. For users relying on OpenCL-based workloads, the older card still holds some relevance, though this is a narrow use case.

For gaming and general 3D rendering, the RX 6750 XT is clearly the superior choice. The data from the 3DMark Steel Nomad DX12 test shows a score of 2548 for the RX 6750 XT, a test not even run on the GTX 780 Ti, which lacks the modern API feature set. The RX 6750 XT’s 12 GB VRAM also provides a significant advantage for modern game textures and high-resolution rendering, while the GTX 780 Ti’s 3 GB is a limiting factor. The RX 6750 XT also offers better performance in DirectX 11 and DirectX 12 tests according to PassMark scores, though the GTX 780 Ti was not benchmarked in those specific tests.

Specification Differences

The specification sheets reveal stark contrasts between the two cards. The most obvious difference is the manufacturing process: the RX 6750 XT is built on a 7 nm node, while the GTX 780 Ti uses a 28 nm node. This leads to the RX 6750 XT having a significantly smaller die (335 mm² vs 561 mm²) despite holding more than double the transistors (17,200 million vs 7,080 million). The clock speeds are also vastly different, with the RX 6750 XT’s base clock of 2150 MHz nearly 2.5 times higher than the GTX 780 Ti’s 875 MHz.

Memory configuration is another key differentiator. The RX 6750 XT has 12 GB of GDDR6 memory at 2250 MHz (18 Gbps effective), while the GTX 780 Ti has 3 GB of GDDR5 at 1753 MHz (7 Gbps effective). The bus widths differ as well: 192-bit for the AMD card versus 384-bit for the NVIDIA card. Despite the narrower bus, the RX 6750 XT achieves higher bandwidth (432.0 GB/s vs 336.6 GB/s) due to the faster memory type and clock speeds.

The compute capabilities show a massive gap. The RX 6750 XT delivers 13.31 TFLOPS of FP32 performance and 26.62 TFLOPS of FP16 performance (2:1 ratio), while the GTX 780 Ti manages only 5.345 TFLOPS of FP32 and has no FP16 support listed. Pixel and texture rates also favor the AMD card: 166.4 GPixel/s and 416.0 GTexel/s for the RX 6750 XT, versus 55.68 GPixel/s and 222.7 GTexel/s for the GTX 780 Ti. Both cards have a TDP of 250 W and require a 600 W PSU, with the same power connector configuration (1x 6-pin + 1x 8-pin). The physical dimensions are nearly identical, with the RX 6750 XT being 267 mm long, 110 mm tall, and 40 mm wide, while the GTX 780 Ti is 267 mm long, 111 mm tall, and 38 mm wide.

Display outputs also differ: the RX 6750 XT has 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the GTX 780 Ti has 2x DVI, 1x HDMI 1.4a, and 1x DisplayPort 1.2. The RX 6750 XT supports PCIe 4.0 x16, whereas the GTX 780 Ti is limited to PCIe 3.0 x16.

Head-to-Head Benchmarks

The head-to-head benchmark data shows three tests, with the AMD Radeon RX 6750 XT winning two and the NVIDIA GeForce GTX 780 Ti winning one. The most dramatic result is in Geekbench Metal, where the RX 6750 XT scores 137249 against the GTX 780 Ti’s 18144. This represents a 656.4% advantage for the AMD card, the largest delta in the comparison. This result underscores the RX 6750 XT’s modern architecture and driver optimizations for Metal, making it the clear choice for macOS or Metal-based applications.

In Geekbench Vulkan, the RX 6750 XT again dominates with a score of 98089, compared to the GTX 780 Ti’s 27238. This is a 260.1% difference in favor of the AMD card. The Vulkan API is the modern standard for cross-platform graphics, and the RX 6750 XT’s RDNA 2.0 architecture is designed to leverage it efficiently. The GTX 780 Ti, with its older Kepler architecture, simply cannot keep pace in this workload.

The one bright spot for the GTX 780 Ti is Geekbench OpenCL, where it scores 27326, beating the RX 6750 XT’s 16360 by 40.1%. This is a surprising result given the overall performance gap, but it highlights that the GTX 780 Ti’s 2880 shading units and 240 TMUs can still deliver competitive raw compute performance in certain APIs. The RX 6750 XT’s lower OpenCL score may be due to driver maturity or architectural trade-offs that favor other APIs. For users running OpenCL-accelerated tasks, the GTX 780 Ti remains a viable option, though this is a narrow niche in the broader context of modern GPU workloads.

The RX 6750 XT’s wins in Metal and Vulkan, combined with its superior specifications across nearly every metric, make it the overwhelmingly stronger GPU for modern use cases. The GTX 780 Ti’s single OpenCL victory confirms its historical design, but it cannot overcome the generational advantages of RDNA 2.0 in other areas. The average benchmark score difference of 1775 points (26011 vs 24236) further reinforces the RX 6750 XT’s overall superiority, despite the older card’s respectable showing in one test.