AMD Radeon RX 460 vs NVIDIA Quadro K6000 Comparison

The NVIDIA Quadro K6000 and AMD Radeon RX 460 represent two very different approaches to GPU design, separated by three years of architectural evolution and targeting distinct market segments. The Quadro K6000, a 2013 workstation flagship, leans on sheer compute muscle from its Kepler architecture, while the 2016 RX 460, built on GCN 4.0, prioritizes efficiency and modern API support. Benchmark data shows a clear split: the K6000 dominates in OpenCL and Vulkan compute workloads, while the RX 460 counters with a surprising Metal performance advantage. This creates an interesting dynamic where the older, more expensive card wins in raw throughput, but the newer, power-sipping card takes the lead in at least one API-specific test.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA Quadro K6000 edges out the AMD Radeon RX 460 with an average benchmark score of 19,030 compared to 18,373, a difference of roughly 3.6%.

Q: How does the Quadro K6000 perform in OpenCL versus the RX 460?

A: The Quadro K6000 scores 23,749 in Geekbench OpenCL, which is 33% higher than the RX 460's 17,855, making it the clear winner in this compute API.

Q: What is the most significant win for the AMD Radeon RX 460?

A: The RX 460 wins the Geekbench Metal test decisively, scoring 17,065 versus the Quadro K6000's 7,932, a 53.5% margin in favor of the AMD card.

Q: Which GPU has a higher transistor density?

A: The AMD Radeon RX 460 has a much higher transistor density at 24.4M per mm², compared to the NVIDIA Quadro K6000's 12.6M per mm², reflecting the RX 460's smaller and more modern 14nm process.

Q: What are the power requirements for each card?

A: The Quadro K6000 has a 225W TDP and requires a 550W suggested power supply, while the RX 460 has a 75W TDP and only needs a 250W suggested power supply.

Q: Which GPU supports a newer version of Vulkan?

A: The AMD Radeon RX 460 supports Vulkan 1.3, whereas the NVIDIA Quadro K6000 only supports Vulkan 1.2.175.

The Verdict

The data points to a straightforward choice for different user profiles. For anyone prioritizing raw compute throughput in OpenCL or Vulkan, the NVIDIA Quadro K6000 is the superior option, delivering 33% and 25.8% higher scores respectively in those tests. Its 12 GB of VRAM and 384-bit memory bus also provide a massive memory bandwidth advantage (288.4 GB/s vs. 112.0 GB/s), which is critical for handling large datasets typical of professional rendering or scientific workloads. The K6000 also holds a higher percentile rank among all GPUs (63rd versus 62nd), though this is a marginal difference.

Conversely, the AMD Radeon RX 460 is the better pick for scenarios where Metal API performance is paramount, as it outperforms the K6000 by over double in that specific benchmark. Its modern feature set, including DirectX 12 (12_0), Vulkan 1.3, and HDMI 2.0b, makes it more future-proof for consumer applications. Furthermore, its drastically lower power draw (75W vs. 225W) and lack of external power connectors make it a far more accessible option for compact or low-power builds. The choice hinges on whether the workload is compute-heavy (choose K6000) or API-specific and efficiency-focused (choose RX 460).

Head-to-Head Benchmarks

The head-to-head benchmark results reveal a fascinating split. In Geekbench OpenCL, the NVIDIA Quadro K6000 achieves a score of 23,749, which is 33% higher than the AMD Radeon RX 460's 17,855. This is the largest percentage win for the K6000 and aligns with its professional-grade compute architecture. The story repeats in Geekbench Vulkan, where the K6000 scores 25,409 against the RX 460's 20,198, a 25.8% advantage. This consistency suggests that the K6000's larger shader count (2,880 vs. 896) and higher memory bandwidth provides a substantial edge in these low-level, compute-oriented APIs.

The most surprising result comes from Geekbench Metal. Here, the AMD Radeon RX 460 wins decisively with a score of 17,065, while the NVIDIA Quadro K6000 manages only 7,932. The deltaPct of -53.5% indicates a massive reversal of fortunes. This outcome is counterintuitive given the K6000's superior raw specs, but it likely reflects the architectural age difference; the Kepler architecture was not optimized for Apple's Metal API, which was introduced later. This single test shows that API-level optimizations can outweigh raw hardware capabilities, making the RX 460 the better choice for macOS or Metal-based workflows.

Specification Differences

The two cards diverge sharply on almost every core specification. The NVIDIA Quadro K6000 features 2,880 shading units, 240 texture mapping units, and 48 ROPs, while the AMD Radeon RX 460 has 896 shading units, 56 TMUs, and just 16 ROPs. This translates to dramatically different fill rates: the K6000 produces 54.12 GPixel/s and 216.5 GTexel/s, compared to the RX 460's 19.20 GPixel/s and 67.20 GTexel/s. The FP32 compute performance follows suit, with the K6000 delivering 5.196 TFLOPS versus the RX 460's 2.150 TFLOPS.

Memory is another area of complete divergence. The K6000 comes with 12 GB of GDDR5 on a 384-bit bus, yielding 288.4 GB/s of bandwidth. The RX 460 has only 2 GB of GDDR5 on a 128-bit bus, giving it 112.0 GB/s. Clock speeds tell a different story, with the RX 460 having higher base and boost clocks (1090 MHz and 1200 MHz) compared to the K6000 (797 MHz and 902 MHz). The RX 460 also features a PCIe 3.0 x8 interface, while the K6000 uses a full x16 slot. Physical dimensions differ too: the K6000 is 267 mm long, while the RX 460 is just 170 mm.

Architecture Differences

The architectural chasm between these two GPUs is significant. The NVIDIA Quadro K6000 is built on the Kepler architecture (chip GK110B) using a 28nm process at TSMC, with 7,080 million transistors on a large 561 mm² die. This results in a transistor density of 12.6M per mm². The AMD Radeon RX 460 uses the GCN 4.0 architecture (chip Baffin) on a 14nm process at GlobalFoundries, packing 3,000 million transistors into a much smaller 123 mm² die, giving it a density of 24.4M per mm².

This generational leap in process technology explains the RX 460's efficiency advantages. The K6000's Kepler architecture supports DirectX 12 (11_1) and Vulkan 1.2.175, while the RX 460's GCN 4.0 supports full DirectX 12 (12_0) and Vulkan 1.3. The RX 460 also has a 1:1 FP16 to FP32 ratio (2.150 TFLOPS), a feature absent on the K6000, which lacks FP16 support altogether. Display outputs also differ, with the K6000 offering 2x DVI and 2x DisplayPort 1.2, while the RX 460 provides 1x DVI, 1x HDMI 2.0b, and 1x DisplayPort 1.4a, reflecting newer connectivity standards.

Where Each One Wins

The NVIDIA Quadro K6000 wins in scenarios demanding maximum compute power and memory capacity. Its 33% lead in OpenCL and 25.8% lead in Vulkan make it the obvious choice for applications like 3D rendering, scientific simulations, or large-scale data processing that leverage these APIs. The 12 GB VRAM and 288.4 GB/s bandwidth are crucial for handling large textures, high-resolution buffers, or complex CAD models without running out of memory. The K6000's higher texture rate (216.5 GTexel/s) and pixel rate (54.12 GPixel/s) also give it an edge in traditional rasterization workloads, even if its API support is aging.

The AMD Radeon RX 460 wins in the Metal API arena, with a 53.5% higher score in Geekbench Metal. This makes it the better option for macOS users or developers targeting Metal-exclusive applications. Its modern feature set, including DirectX 12 (12_0) and Vulkan 1.3, makes it more compatible with current game engines and consumer software. The RX 460 also wins on efficiency, with a 75W TDP that requires no external power connectors and a suggested 250W PSU, making it ideal for small form factor PCs or systems with limited power budgets. Its smaller physical footprint (170 mm) also allows for installation in cases where the K6000's 267 mm length would not fit. In short, the K6000 is for heavy compute, while the RX 460 is for modern API compatibility and low-power builds.