AMD Radeon 540 vs NVIDIA GeForce GTX 650 Ti Boost Comparison

# NVIDIA GeForce GTX 650 Ti Boost vs AMD Radeon 540

The NVIDIA GeForce GTX 650 Ti Boost and AMD Radeon 540 represent two very different approaches to the low-end GPU segment, separated by four years of architecture evolution but delivering surprisingly close average benchmark scores. The GTX 650 Ti Boost, a 2013 Kepler design, edges out the 2017 Polaris-based Radeon 540 with an average benchmark score of 8067 against 7673, placing the NVIDIA card at the 42nd percentile and the AMD card at the 41st percentile of all GPUs. While the overall margin is just 5.1%, the individual workload results tell a more complex story, with the older card winning both head-to-head tests by substantial margins in one case and a narrow margin in the other.

Where Each One Wins

The GTX 650 Ti Boost is the clear winner in compute-heavy workloads, particularly in OpenCL. Its Geekbench OpenCL score of 9302 crushes the Radeon 540's 6184, a 50.4% advantage that highlights the NVIDIA card's superior raw throughput capabilities. This advantage stems from the GTX 650 Ti Boost's larger shader count and higher FP32 performance, making it the better choice for general-purpose compute tasks, video encoding, and any application that leverages OpenCL acceleration.

In Vulkan workloads, the margin narrows considerably but still favors NVIDIA. The GTX 650 Ti Boost scores 10041 in Geekbench Vulkan against the Radeon 540's 9162, a 9.6% lead. This suggests that while the newer AMD card narrows the gap in modern graphics APIs, it still cannot surpass the older Kepler design in this particular benchmark. The Radeon 540's sole advantage lies in architectural efficiency and features rather than raw performance, offering a more modern feature set with DirectX 12 (12_0) support and Vulkan 1.3 compatibility.

For users prioritizing compute performance or legacy OpenCL workloads, the GTX 650 Ti Boost is the definitive choice. The Radeon 540, despite its newer architecture, fails to win any benchmark in the head-to-head comparison, with zero wins against the NVIDIA card's two. The data shows no workload category where the AMD card takes the lead, making the GTX 650 Ti Boost the performance winner across the board, albeit with a narrower margin in Vulkan than in OpenCL.

Architecture Differences

The architectural gap between these two cards is substantial, representing two distinct design philosophies separated by four years of GPU evolution. The GTX 650 Ti Boost uses the GK106 chip built on TSMC's 28 nm process, packing 2,540 million transistors into a 221 mm² die. This yields a transistor density of 11.5M per mm², reflecting the less mature manufacturing technology of 2013. The Radeon 540, in contrast, uses the Lexa chip manufactured by GlobalFoundries on a 14 nm process, with 2,200 million transistors in a much smaller 103 mm² die, achieving a significantly higher density of 21.4M per mm².

The Kepler architecture in the GTX 650 Ti Boost is built around 768 shading units, 64 texture mapping units, and 24 raster operations pipelines. This configuration delivers a pixel rate of 16.51 GPixel/s and a texture rate of 66.05 GTexel/s, with FP32 performance rated at 1.585 TFLOPS. The GCN 4.0 architecture in the Radeon 540 features 384 shading units, 24 TMUs, and 16 ROPs, producing a higher pixel rate of 18.93 GPixel/s despite fewer ROPs, but a much lower texture rate of 28.39 GTexel/s and FP32 performance of just 908.5 GFLOPS. Notably, the Radeon 540 supports FP16 at 908.5 GFLOPS with a 1:1 ratio to FP32, a capability the Kepler card lacks entirely.

Power efficiency is where the newer architecture shines. The Radeon 540 draws just 50 W TDP and requires no power connectors, while the GTX 650 Ti Boost consumes 134 W and needs a 1x 6-pin power connector. The suggested PSU ratings reflect this gap: 250 W for the AMD card versus 300 W for the NVIDIA card. The Radeon 540 also occupies a single slot, while the GTX 650 Ti Boost needs dual slots. The bus interface differs as well, with the NVIDIA card using PCIe 3.0 x16 and the AMD card using PCIe 3.0 x8, which may impact bandwidth-sensitive workloads on older platforms.

Head-to-Head Benchmarks

The Geekbench OpenCL test delivers the most decisive result in this comparison. The GTX 650 Ti Boost scores 9302, while the Radeon 540 manages only 6184, giving NVIDIA a 50.4% advantage. This is a massive margin that reflects the fundamental throughput differences between the two cards. The GTX 650 Ti Boost's 1.585 TFLOPS FP32 performance, combined with its 144.2 GB/s memory bandwidth, provides more than 1.7 times the FP32 throughput of the Radeon 540 and six times the memory bandwidth. The Radeon 540's 24.00 GB/s bandwidth is a severe bottleneck for compute workloads, explaining why its OpenCL performance lags so far behind despite its higher pixel rate.

The Vulkan benchmark paints a different picture, though NVIDIA still emerges victorious. The GTX 650 Ti Boost scores 10041 against the Radeon 540's 9162, a 9.6% lead that is far more modest than the OpenCL margin. This narrower gap suggests that the Radeon 540's modern GCN 4.0 architecture with Vulkan 1.3 support and DirectX 12 (12_0) features helps it compete more effectively in current-generation graphics APIs. The GTX 650 Ti Boost, with its older Kepler architecture supporting only Vulkan 1.2.175 and DirectX 12 (11_0), still manages to outperform the newer card, but the architectural efficiency of GCN 4.0 is evident in the reduced margin.

The average benchmark scores reinforce NVIDIA's overall superiority: 8067 for the GTX 650 Ti Boost versus 7673 for the Radeon 540. The nearest rival data places the GTX 650 Ti Boost within 0.3% of the NVIDIA GRID K2 (8080), GeForce GTX 650 Ti (8053), GeForce GTX 880M (8040), and Quadro P5000 (8039). The Radeon 540 sits 0.6% behind the GeForce GTX 1660 Ti (7723) and 1.2% ahead of the Radeon Pro WX 3100 (7580), placing it in a similar performance tier despite the architectural differences.

Specification Differences

The most striking specification difference is memory bandwidth. The GTX 650 Ti Boost offers 144.2 GB/s across a 192-bit bus with 2 GB of GDDR5 memory, while the Radeon 540 provides just 24.00 GB/s over a 32-bit bus with only 1024 MB of GDDR5. This six-fold bandwidth advantage for the NVIDIA card is the single largest differentiator and explains much of its performance lead. Memory clock speeds are nearly identical, with the GTX 650 Ti Boost at 1502 MHz and the Radeon 540 at 1500 MHz, both delivering 6 Gbps effective, but the bus width difference is decisive.

Shader resources also differ significantly. The GTX 650 Ti Boost has 768 shading units, 64 TMUs, and 24 ROPs, while the Radeon 540 has exactly half the shading units at 384, 24 TMUs, and 16 ROPs. The NVIDIA card's clock speeds are specified at 980 MHz base and 1032 MHz boost, while the Radeon 540 lists no base or boost clock in the data. The GTX 650 Ti Boost's texture rate of 66.05 GTexel/s is more than double the Radeon 540's 28.39 GTexel/s, and its FP32 performance of 1.585 TFLOPS nearly doubles the AMD card's 908.5 GFLOPS.

Display outputs differ as well: the GTX 650 Ti Boost provides 2x DVI, 1x HDMI 1.4a, and 1x DisplayPort 1.2, while the Radeon 540 offers only 2x DisplayPort 1.4a. Power requirements favor the AMD card, with its 50 W TDP versus 134 W for NVIDIA, and the Radeon 540 needs no power connectors while the GTX 650 Ti Boost requires a 1x 6-pin. The physical dimensions also differ, with the GTX 650 Ti Boost measuring 241 mm (9.5 inches) in length, while the Radeon 540 has no listed dimensions. Both cards are end-of-life products, but the GTX 650 Ti Boost launched with a 169 USD MSRP and was released on 2013-03-25, while the Radeon 540 has no launch MSRP and debuted on 2017-04-19.

FAQ

Q: Which card has higher average benchmark scores?

A: The NVIDIA GeForce GTX 650 Ti Boost averages 8067 across all benchmarks, while the AMD Radeon 540 averages 7673, giving NVIDIA approximately a 5.1% advantage.

Q: How large is the OpenCL performance gap between these two GPUs?

A: The GTX 650 Ti Boost scores 9302 in Geekbench OpenCL, which is 50.4% higher than the Radeon 540's 6184, representing the largest single-benchmark margin in this comparison.

Q: Does the Radeon 540 win any benchmarks against the GTX 650 Ti Boost?

A: No. The head-to-head data shows the GTX 650 Ti Boost winning both the OpenCL and Vulkan tests, with the Radeon 540 recording zero wins against the NVIDIA card.

Q: What causes the massive memory bandwidth difference between these cards?

A: The GTX 650 Ti Boost uses a 192-bit memory bus delivering 144.2 GB/s, while the Radeon 540 has a 32-bit bus providing only 24.00 GB/s, creating a six-fold bandwidth advantage for the NVIDIA card despite similar memory clock speeds.

Q: Which card is more power-efficient?

A: The AMD Radeon 540 has a 50 W TDP and requires no power connectors, while the GTX 650 Ti Boost draws 134 W and needs a single 6-pin connector. The suggested PSU ratings are 250 W for the AMD card and 300 W for the NVIDIA card.

Q: How do the two cards compare in Vulkan performance?

A: The GTX 650 Ti Boost scores 10041 in Geekbench Vulkan, leading the Radeon 540's 9162 by 9.6%. This is a much smaller margin than the OpenCL difference, reflecting the newer AMD card's better support for modern graphics APIs.