AMD Radeon R7 M340 vs NVIDIA Quadro K4000M Comparison

FAQ

Q: Which GPU has the higher average benchmark score in the database?

A: The NVIDIA Quadro K4000M records an average benchmark score of 5986, while the AMD Radeon R7 M340 averages 5063. The Quadro K4000M sits in the 34th percentile of all GPUs, compared to the 30th percentile for the Radeon R7 M340.

Q: How do the two cards compare in the OpenCL benchmark?

A: In the Geekbench OpenCL test, the NVIDIA Quadro K4000M scores 5986 against 4932 for the AMD Radeon R7 M340, giving the NVIDIA part a 21.4% lead in that specific workload.

Q: What memory configurations do these two mobile GPUs use?

A: The NVIDIA Quadro K4000M comes with 4 GB of GDDR5 memory on a 256-bit bus, delivering 89.60 GB/s of bandwidth. The AMD Radeon R7 M340 uses 2 GB of DDR3 memory on a 64-bit bus, with 16.00 GB/s of bandwidth.

Q: Which GPU has higher clock speeds?

A: The AMD Radeon R7 M340 runs at a base clock of 943 MHz and a boost clock of 1021 MHz. The NVIDIA Quadro K4000M operates at a fixed 601 MHz for both base and boost clocks.

Q: Do both GPUs support the same DirectX version?

A: No. The AMD Radeon R7 M340 supports DirectX 12 (12_0), while the NVIDIA Quadro K4000M supports DirectX 12 (11_0), meaning the AMD part implements a higher feature level.

Q: What are the closest rivals for each card according to the database?

A: The Quadro K4000M's nearest rival is the AMD FirePro W4100, which scores 5987, a 0% delta. The Radeon R7 M340's closest competitor is the AMD Radeon R7 240, scoring 5063, also a 0% delta.

Architecture Differences

The NVIDIA Quadro K4000M is built on the Kepler architecture using the GK104 chip, manufactured by TSMC on a 28 nm process. It packs 3,540 million transistors into a die size of 294 mm², resulting in a transistor density of 12.0M per mm². The AMD Radeon R7 M340 uses the GCN 3.0 architecture with the Meso chip, also on TSMC's 28 nm node, but with 1,550 million transistors on a much smaller 125 mm² die, giving a slightly higher transistor density of 12.4M per mm².

The compute resources differ substantially. The Quadro K4000M features 960 shading units, 80 texture mapping units, and 32 ROPs. The Radeon R7 M340 has 320 shading units, 20 TMUs, and 8 ROPs. These raw unit counts directly influence the pixel and texture throughput: the NVIDIA part delivers 12.02 GPixel/s and 48.08 GTexel/s, while the AMD part manages 8.168 GPixel/s and 20.42 GTexel/s.

Both chips are produced by the same foundry on the same process node, but the Quadro K4000M is a substantially larger and more complex chip. The Kepler generation for NVIDIA was designed for professional mobile workstations, while the GCN 3.0 architecture for AMD targeted the mainstream mobile segment. The Quadro K4000M belongs to the Quadro Kepler-M (Kx000M) generation, whereas the Radeon R7 M340 is part of the Gem System (R7 M300) generation.

The Quadro K4000M uses an MXM-B (3.0) bus interface, while the Radeon R7 M340 connects via PCIe 3.0 x8. The NVIDIA card is packaged as an MXM Module with no power connectors required, reflecting its mobile workstation design. The AMD card has no listed slot width, power connectors, or display outputs in the database.

For API support, the Radeon R7 M340 supports DirectX 12 (12_0), Vulkan 1.2.170, and OpenGL 4.6. The Quadro K4000M supports DirectX 12 (11_0), Vulkan 1.2.175, and OpenGL 4.6. The AMD card has a higher DirectX feature level, while the NVIDIA card has a slightly newer Vulkan version.

Where Each One Wins

The NVIDIA Quadro K4000M wins in every recorded head-to-head benchmark category. It holds a 21.4% advantage in the Geekbench OpenCL test, which is the only shared benchmark in the database. The Quadro also wins the overall average score comparison, 5986 to 5063, a difference of 923 points.

The Quadro K4000M's strengths lie in its memory subsystem. With 4 GB of GDDR5 on a 256-bit bus, it offers 89.60 GB/s of bandwidth, which is more than five times the 16.00 GB/s of the Radeon R7 M340. This bandwidth advantage, combined with 960 shading units versus 320, gives the NVIDIA card a clear edge in compute-heavy OpenCL workloads.

The Radeon R7 M340 does have a Vulkan benchmark score recorded (5193), while the Quadro K4000M has no Vulkan score in the database. This means the AMD card can be evaluated in Vulkan scenarios, but no direct comparison is possible. The Radeon's higher clock speeds (1021 MHz boost versus 601 MHz) and newer DirectX feature level (12_0 versus 11_0) are its notable advantages, though these do not translate into benchmark wins in the recorded data.

The Quadro K4000M also sits higher in the overall percentile ranking, at 34 versus 30 for the Radeon. Neither card is in the upper echelon of GPUs, but the NVIDIA part consistently outperforms the AMD part in the measured metrics.

Specification Differences

| Specification | NVIDIA Quadro K4000M | AMD Radeon R7 M340 |

|---|---|---|

| Architecture | Kepler | GCN 3.0 |

| Chip | GK104 | Meso |

| Process Node | 28 nm | 28 nm |

| Transistors | 3,540 million | 1,550 million |

| Die Size | 294 mm² | 125 mm² |

| Transistor Density | 12.0M / mm² | 12.4M / mm² |

| Base Clock | 601 MHz | 943 MHz |

| Boost Clock | 601 MHz | 1021 MHz |

| Memory Size | 4 GB | 2 GB |

| Memory Type | GDDR5 | DDR3 |

| Memory Bus Width | 256 bit | 64 bit |

| Memory Bandwidth | 89.60 GB/s | 16.00 GB/s |

| Memory Clock | 2.8 Gbps effective | 2 Gbps effective |

| Shading Units | 960 | 320 |

| TMUs | 80 | 20 |

| ROPs | 32 | 8 |

| Pixel Rate | 12.02 GPixel/s | 8.168 GPixel/s |

| Texture Rate | 48.08 GTexel/s | 20.42 GTexel/s |

| FP32 Performance | 1,153.9 GFLOPS | 653.4 GFLOPS |

| FP16 Performance | Not listed | 653.4 GFLOPS (1:1) |

| TDP | 100 W | Not listed |

| Bus Interface | MXM-B (3.0) | PCIe 3.0 x8 |

| DirectX | 12 (11_0) | 12 (12_0) |

| Vulkan | 1.2.175 | 1.2.170 |

| Release Date | 2012-05-31 | 2015-05-04 |

Head-to-Head Benchmarks

The only shared benchmark between these two GPUs is Geekbench OpenCL. In that test, the NVIDIA Quadro K4000M scores 5986, while the AMD Radeon R7 M340 scores 4932. The delta is 21.4% in favor of the NVIDIA card. This is a decisive margin, and it aligns with the underlying hardware differences: the Quadro has three times the shading units and 5.6 times the memory bandwidth.

The Quadro K4000M's FP32 throughput of 1,153.9 GFLOPS is roughly 77% higher than the Radeon's 653.4 GFLOPS. The texture rate of 48.08 GTexel/s more than doubles the Radeon's 20.42 GTexel/s. These compute metrics explain the OpenCL score gap.

The Radeon R7 M340 does have a Vulkan benchmark entry at 5193, but the Quadro K4000M has no recorded Vulkan score, so a direct comparison in that API is not possible from the database. The Radeon's Vulkan score is higher than its own OpenCL score (5193 versus 4932), suggesting the GCN 3.0 architecture handles Vulkan workloads relatively well, but without a Quadro number, no conclusion can be drawn about relative Vulkan performance.

Looking at the nearest rivals provides context. The Quadro K4000M's closest competitor, the AMD FirePro W4100, scores 5987, essentially identical to the Quadro's 5986. The NVIDIA Quadro K4000 desktop card scores 5982, also within 0.1%. The Radeon R7 M340's nearest rival is the AMD Radeon R7 240 at 5063, a 0% delta, followed by the AMD FirePro W4170M at 5034 (0.6% behind).

The average benchmark scores place the Quadro K4000M 923 points ahead of the Radeon R7 M340. In percentile terms, the Quadro ranks at 34 versus 30 for the Radeon. While both are below the median of all GPUs, the Quadro K4000M is clearly the stronger performer in the recorded data.

The Verdict

The data is unambiguous: the NVIDIA Quadro K4000M outperforms the AMD Radeon R7 M340 in every measurable category where both have scores. The 21.4% OpenCL lead is substantial, and the average score gap of 923 points reinforces this conclusion. The Quadro K4000M also carries a higher percentile ranking (34th versus 30th) among all GPUs.

For users who prioritize compute performance, OpenCL workloads, or memory bandwidth, the Quadro K4000M is the clear choice. Its 4 GB GDDR5 frame buffer with 89.60 GB/s bandwidth dwarfs the Radeon's 2 GB DDR3 at 16.00 GB/s. The 960 shading units and 80 TMUs provide a strong foundation for graphics and general-purpose compute tasks.

The Radeon R7 M340 does have advantages worth noting. It runs at much higher clocks (1021 MHz boost versus 601 MHz), supports DirectX 12 (12_0) compared to the Quadro's 12 (11_0), and has a recorded Vulkan score of 5193. It is also a much smaller chip at 125 mm² versus 294 mm², which historically suggests lower power draw, though the database lists no TDP for the AMD card.

The Quadro K4000M was released on 2012-05-31, while the Radeon R7 M340 came later on 2015-05-04. Despite being three years older, the NVIDIA card maintains a decisive performance lead in the database. The Quadro's successor is the Quadro Maxwell-M, while the Radeon's successor is the Polaris Mobile, indicating both have moved to end-of-life status.

The nearest rival data reinforces the Quadro's position. The Quadro K4000M trades blows with the AMD FirePro W4100 (5987 versus 5986, a 0% delta) and the NVIDIA Quadro K4000 desktop (5982, 0.1% behind). The Radeon R7 M340, by contrast, is matched by the AMD Radeon R7 240 (5063, 0% delta) and the AMD Radeon R7 Graphics (4998, 1.3% behind).

In practical terms, the Quadro K4000M is the stronger mobile workstation GPU, suited for tasks that demand memory bandwidth and compute throughput. The Radeon R7 M340 is a lighter mobile part, adequate for basic graphics duties but clearly outclassed in compute-heavy scenarios. Users needing Vulkan support or a higher DirectX feature level might prefer the Radeon, but for raw performance as recorded in the database, the NVIDIA Quadro K4000M is the definitive winner.