AMD Radeon R7 M440 vs NVIDIA Quadro K620M Comparison

Head-to-Head Benchmarks

The recorded benchmark data shows a single direct comparison between the NVIDIA Quadro K620M and the AMD Radeon R7 M440, and the result is decisive. In the Geekbench OpenCL test, the NVIDIA Quadro K620M scored 5,957 points, while the AMD Radeon R7 M440 scored 5,214 points. This gives the NVIDIA part a 14.3% lead in raw compute performance, a substantial margin for mobile workstation-class GPUs in this segment.

The AMD Radeon R7 M440 does not win any of the recorded head-to-head comparisons. However, the database does list a Vulkan score for the AMD part of 5,751, which is not available for the NVIDIA Quadro K620M. This means the AMD GPU has a measured Vulkan result that is actually higher than its own OpenCL score, suggesting the architecture handles the Vulkan API more efficiently than OpenCL. The NVIDIA part has no Vulkan measurement recorded, so direct comparison across that API is not possible from the data.

Looking at the broader benchmark context, the NVIDIA Quadro K620M sits at the 34th percentile of all GPUs in the database, while the AMD Radeon R7 M440 sits at the 32nd percentile. The average benchmark score across all recorded tests for the NVIDIA part is 5,957, while the AMD part averages 5,483 across its two recorded tests (OpenCL and Vulkan). This average difference of 474 points reinforces the NVIDIA advantage in compute workloads, though the AMD part's Vulkan performance narrows the gap when considering its best-case scenario.

The nearest rivals in the database provide additional context. The NVIDIA Quadro K620M's closest competitor is the AMD Radeon HD 8730M with an average score of 5,955, a negligible 0% delta. The NVIDIA Quadro K4000 scores 5,982, just 0.4% higher than the K620M, while the Intel UHD Graphics 730 trails by 0.5%. The AMD Radeon R7 M440's nearest rivals include the NVIDIA Quadro M4000 at 5,467, which the R7 M440 beats by 0.3%, and the AMD Radeon 610M at 5,444, which it leads by 0.7%. These proximity scores indicate both parts sit in a tightly packed performance band, but the NVIDIA GPU holds a clear edge within that band.

Where Each One Wins

The NVIDIA Quadro K620M is the clear winner in OpenCL compute workloads. Its 14.3% advantage over the AMD Radeon R7 M440 in the Geekbench OpenCL test is the only direct head-to-head victory recorded. This makes the K620M the stronger choice for applications that leverage OpenCL for general-purpose GPU computing, such as scientific simulations, image processing, or any workflow that offloads parallel tasks to the GPU. The 863.2 GFLOPS of FP32 performance on the NVIDIA part versus 570.2 GFLOPS on the AMD part explains this compute advantage, though those figures come from the specification data rather than the benchmark scores.

The AMD Radeon R7 M440 wins in the Vulkan API category, but only by default. The database records a Vulkan score of 5,751 for the AMD part, while no Vulkan score exists for the NVIDIA Quadro K620M. This means the AMD GPU is the only one of the two with a proven Vulkan performance profile. For users running Vulkan-based applications, which are increasingly common in modern game engines and some workstation visualization tools, the R7 M440 has demonstrated capability while the K620M has no recorded data to confirm its performance.

The AMD part also has an advantage in memory capacity. It comes with 4 GB of DDR3 memory compared to 2 GB on the NVIDIA GPU. While the NVIDIA part has higher memory bandwidth at 16.02 GB/s versus 14.40 GB/s on the AMD part, the larger frame buffer on the R7 M440 could be beneficial for workloads that require large textures or datasets that exceed the 2 GB limit of the K620M. This is a qualitative advantage based on the capacity difference, not a measured benchmark result.

Architecture Differences

The two GPUs come from different architectural generations and have distinct design philosophies. The NVIDIA Quadro K620M uses the GM108S chip based on the Maxwell architecture, fabricated on a 28 nm process at TSMC. The AMD Radeon R7 M440 uses the Meso chip based on GCN 3.0, also fabricated on a 28 nm process at TSMC. Both share the same process node and foundry, so the architectural differences are purely in design implementation rather than manufacturing technology.

The transistor counts differ significantly. The AMD chip packs 1,550 million transistors on a 125 mm² die, while the NVIDIA chip has 1,020 million transistors on a 77 mm² die. This gives the NVIDIA chip a higher transistor density at 13.2 million per mm² versus 12.4 million per mm² on the AMD chip. The larger AMD die with more transistors does not translate into higher performance, as the benchmark results show, indicating the NVIDIA Maxwell architecture achieves better efficiency per transistor.

The compute resource allocation differs between the two. The NVIDIA Quadro K620M has 384 shading units, 16 texture mapping units, and 8 render output units. The AMD Radeon R7 M440 has 320 shading units, 20 texture mapping units, and 8 render output units. Despite having fewer shading units, the AMD part has more texture units, but the NVIDIA part still achieves higher texture and pixel rates: 17.98 GTexel/s and 8.992 GPixel/s for the NVIDIA versus 17.82 GTexel/s and 7.128 GPixel/s for the AMD. The FP32 compute performance shows the NVIDIA part at 863.2 GFLOPS versus 570.2 GFLOPS on the AMD part, a 51.4% advantage in raw floating-point throughput.

Memory architecture is similar in bus width, both using a 64-bit interface, but the NVIDIA GPU operates its DDR3 memory at 1001 MHz for 2 Gbps effective and 16.02 GB/s bandwidth. The AMD GPU runs its DDR3 at 900 MHz for 1,800 Mbps effective and 14.40 GB/s bandwidth. The API support differs notably: the NVIDIA part supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.4, while the AMD part supports DirectX 12 (12_0), OpenGL 4.6, and Vulkan 1.2.170. The AMD part has a higher DirectX feature level, while the NVIDIA part has a newer Vulkan version. The AMD GPU also lists FP16 performance at 570.2 GFLOPS with a 1:1 ratio to FP32, while the NVIDIA part has no FP16 data recorded.

FAQ

Q: Which GPU has the higher OpenCL benchmark score?

A: The NVIDIA Quadro K620M scores 5,957 in Geekbench OpenCL, which is 14.3% higher than the AMD Radeon R7 M440's score of 5,214.

Q: Does the AMD Radeon R7 M440 have any benchmark advantage over the NVIDIA Quadro K620M?

A: The AMD part has a recorded Vulkan score of 5,751, while the NVIDIA part has no Vulkan score in the database. This gives the AMD GPU a proven Vulkan performance profile that the NVIDIA GPU lacks.

Q: How do the two GPUs compare in memory capacity and bandwidth?

A: The AMD Radeon R7 M440 has 4 GB of DDR3 memory, while the NVIDIA Quadro K620M has 2 GB. However, the NVIDIA part has higher bandwidth at 16.02 GB/s versus 14.40 GB/s on the AMD part, both using a 64-bit bus.

Q: What are the pixel and texture fill rates for each GPU?

A: The NVIDIA Quadro K620M achieves 8.992 GPixel/s and 17.98 GTexel/s, while the AMD Radeon R7 M440 achieves 7.128 GPixel/s and 17.82 GTexel/s.

Q: Which GPU has more shading units?

A: The NVIDIA Quadro K620M has 384 shading units, while the AMD Radeon R7 M440 has 320 shading units.

Q: What DirectX versions do the two GPUs support?

A: The NVIDIA Quadro K620M supports DirectX 12 (11_0), while the AMD Radeon R7 M440 supports DirectX 12 (12_0), giving the AMD part a higher feature level.

The Verdict

The data supports the NVIDIA Quadro K620M as the stronger performer in compute workloads. Its 14.3% lead in OpenCL benchmarking, combined with higher FP32 throughput, pixel rate, and texture rate, makes it the clear choice for OpenCL-based applications. The 863.2 GFLOPS of FP32 performance versus 570.2 GFLOPS on the AMD part represents a substantial compute advantage that should translate into faster execution of parallel workloads.

The AMD Radeon R7 M440 is the better choice for users who prioritize Vulkan compatibility or need more memory capacity. Its recorded Vulkan score of 5,751 demonstrates functional Vulkan performance, while the NVIDIA part has no Vulkan data. The 4 GB memory capacity doubles the NVIDIA part's 2 GB, which could be critical for applications that require large working sets. The AMD part also has a higher DirectX feature level at 12_0 versus 11_0.

For most professional workstation tasks that rely on OpenCL, the NVIDIA Quadro K620M is the recommended choice based on the benchmark evidence. For users running Vulkan-based applications or needing larger memory allocations, the AMD Radeon R7 M440 offers advantages that the benchmark scores do not capture. The percentile rankings, 34th for NVIDIA and 32nd for AMD, reflect this overall ordering, but the AMD part's Vulkan result and memory capacity give it a distinct role in specific use cases.

Specification Differences

The two GPUs differ across several key specifications. The NVIDIA Quadro K620M uses the GM108S chip on the Maxwell architecture, while the AMD Radeon R7 M440 uses the Meso chip on GCN 3.0. The NVIDIA part has 1,020 million transistors on a 77 mm² die with a density of 13.2 million per mm², while the AMD part has 1,550 million transistors on a 125 mm² die with a density of 12.4 million per mm².

Clock speeds differ, with the NVIDIA GPU running at 1029 MHz base and 1124 MHz boost, while the AMD GPU has no base or boost clock listed. Memory clocks are 1001 MHz for the NVIDIA part and 900 MHz for the AMD part. The NVIDIA GPU has 384 shading units and 16 TMUs, while the AMD GPU has 320 shading units and 20 TMUs. Both have 8 ROPs.

FP32 performance is 863.2 GFLOPS for the NVIDIA part and 570.2 GFLOPS for the AMD part. The AMD part lists FP16 at 570.2 GFLOPS with a 1:1 ratio, while the NVIDIA part has no FP16 figure. Power consumption is 30 W for the NVIDIA GPU, while the AMD GPU has no TDP listed. The NVIDIA part uses an MXM-A (3.0) bus interface and an MXM Module slot width, while the AMD part uses PCIe 3.0 x8 and an IGP slot width.

The NVIDIA Quadro K620M supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.4, while the AMD Radeon R7 M440 supports DirectX 12 (12_0), OpenGL 4.6, and Vulkan 1.2.170. The NVIDIA part was released in 2015, while the AMD part was released in 2016. The NVIDIA GPU has a predecessor of Quadro Fermi-M and a successor of Quadro Maxwell-M, while the AMD GPU has a predecessor of Solar System and a successor of Polaris Mobile.