AMD Radeon Vega 10 Mobile vs NVIDIA Quadro K620 Comparison

# Head-to-Head Benchmarks

The only direct benchmark comparison available between the AMD Radeon Vega 10 Mobile and the NVIDIA Quadro K620 is the Geekbench OpenCL test, and the results are close enough to be statistically negligible in real-world terms. The Quadro K620 posts a score of 6693, while the Vega 10 Mobile trails by 3.2% with a score of 6476. That margin sits well within the variance seen across the two cards' respective nearest rivals — the Vega 10 Mobile sits within 1.1% of the NVIDIA RTX PRO 5000 72 GB Blackwell (6407) on the low side and within 0.6% of the GeForce GTX 670M (6513) on the high side. The Quadro K620's nearest rivals cluster even tighter, with the GeForce RTX 5070 Ti SUPER (6270) and RTX 4070 Ti SUPER AD102 (6270) both just 0.2% behind, while the AMD Radeon R7 M350 (6327) and Radeon Pro WX 4100 (6330) trail by 0.7% and 0.8% respectively.

What is striking is that despite the K620's narrow win, the two GPUs occupy almost identical positions in the overall performance distribution. The Vega 10 Mobile ranks at the 37th percentile among all GPUs, while the Quadro K620 ranks at the 36th percentile. In practical terms, these are peers — not rivals separated by a meaningful gulf. The K620 also has a Vulkan score of 5870, a test the Vega 10 Mobile does not have a recorded result for, which suggests the NVIDIA card may have broader API coverage in the database.

The deltaPct of -3.2% for the Vega 10 Mobile in OpenCL is the single data point that defines this head-to-head. It is a narrow loss, and one that does not translate into a categorical victory for either card. Both GPUs are end-of-life products, and their benchmark scores place them in the same performance tier, where a driver update or a thermal difference could easily flip the result. The K620 wins the one recorded matchup, but the margin is thin enough that the "winner" designation feels more like a coin flip than a statement of hardware superiority.

# The Verdict

Based strictly on the data, the NVIDIA Quadro K620 takes the head-to-head win with a 3.2% advantage in Geekbench OpenCL (6693 vs 6476) and a Vulkan score of 5870 that the AMD Radeon Vega 10 Mobile cannot answer. The K620 also offers a dedicated 2 GB of DDR3 memory on a 128-bit bus delivering 28.80 GB/s of bandwidth, while the Vega 10 Mobile relies on system-shared memory with bandwidth described only as "System Dependent." For workloads that stress memory bandwidth or require consistent frame buffering, the K620's dedicated VRAM is a structural advantage that the OpenCL score does not fully capture.

However, the Vega 10 Mobile is not without its own arguments. It delivers 1.665 TFLOPS of FP32 performance versus the K620's 863.2 GFLOPS — a 93% advantage in raw compute throughput. It also has more shading units (640 vs 384), more texture mapping units (40 vs 24), and a higher texture rate (52.04 GTexel/s vs 26.98 GTexel/s). The K620 counters with a higher pixel rate (17.98 GPixel/s vs 10.41 GPixel/s) and more render output units (16 vs 8). In compute-heavy tasks like OpenCL, the Vega 10 Mobile's higher FP32 throughput should theoretically narrow or erase the benchmark gap, yet it still loses by 3.2%.

Who should pick which? The Quadro K620 is the safer choice for users who need a dedicated, single-slot card with known memory behavior and a PCIe 2.0 x16 interface. The Vega 10 Mobile is an integrated GPU (IGP) with no slot width, no power connectors, and no discrete memory — it depends entirely on the host system's RAM and is intended for portable devices. If the workload is memory-sensitive or requires a stable frame buffer, the K620 is the data-backed pick. If raw FP32 compute density matters more than memory architecture, the Vega 10 Mobile's 1.665 TFLOPS is the stronger specification, even if the benchmark does not reflect it.

The percentile rankings reinforce the ambiguity: both cards sit within one percentile point of each other (37th vs 36th). Neither GPU is a performance leader by any stretch. The K620 wins the head-to-head, but the Vega 10 Mobile's compute headroom and far lower power draw (10 W vs 45 W) make it the more efficient part. For a laptop or compact device where integrated graphics are the only option, the Vega 10 Mobile is the practical choice. For a workstation where a dedicated, low-profile card is required, the K620 is the verified winner.

# Architecture Differences

The AMD Radeon Vega 10 Mobile is built on GCN 5.0 architecture using the Raven-M chip, fabricated on a 14 nm process at GlobalFoundries. It packs 4,940 million transistors into a 210 mm² die, yielding a transistor density of 23.5 million per square millimeter. The NVIDIA Quadro K620, by contrast, uses the Maxwell architecture with the GM107 chip, built on a 28 nm process at TSMC. Its transistor count is 1,870 million on a 148 mm² die, giving a density of 12.6 million per square millimeter. The process node gap is significant — 14 nm versus 28 nm — and it explains how AMD fits more than 2.6 times the transistors into only 1.4 times the die area.

The Vega 10 Mobile supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3. The Quadro K620 supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.4. The DirectX feature level difference matters: 12_1 on the AMD side versus 11_0 on the NVIDIA side means the Vega 10 Mobile can handle more advanced DX12 features, while the K620 is limited to the older feature set. Vulkan 1.4 on the K620 is a newer API revision than the Vega 10 Mobile's Vulkan 1.3, which is notable given the K620's older release date.

The Vega 10 Mobile is an integrated GPU with an IGP bus interface and no power connectors. The K620 is a single-slot discrete card with a PCIe 2.0 x16 interface, also requiring no external power connectors, but it does list a suggested PSU of 200 W. The memory subsystems are fundamentally different: the Vega 10 Mobile uses system-shared memory with no dedicated VRAM, while the K620 has 2 GB of DDR3 on a 128-bit bus. The Vega 10 Mobile's generation is listed as "Vega IGP (Raven Ridge-M)" while the K620's generation is "Quadro Kepler (Kx200)" — although the chip is actually Maxwell, indicating NVIDIA's naming did not align with the architecture generation.

# Specification Differences

The two cards diverge on nearly every measurable specification. Clock speeds: the Vega 10 Mobile has a base clock of 300 MHz and a boost of 1301 MHz, while the K620 runs at 1058 MHz base and 1124 MHz boost. The AMD part boosts far higher but starts much lower, reflecting its power-managed IGP nature. Memory is the biggest differentiator: the Vega 10 Mobile has system-shared memory with no size, type, or bus width of its own, while the K620 offers 2 GB of DDR3 on a 128-bit bus with 28.80 GB/s bandwidth. The K620's memory runs at 900 MHz (1800 Mbps effective), a figure the Vega 10 Mobile simply does not have.

Compute resources: the Vega 10 Mobile fields 640 shading units, 40 TMUs, and 8 ROPs, versus the K620's 384 shading units, 24 TMUs, and 16 ROPs. The AMD card has more shading and texturing hardware, but the NVIDIA card has double the ROPs. Pixel rates follow: the K620 delivers 17.98 GPixel/s versus the Vega 10 Mobile's 10.41 GPixel/s. Texture rates flip the other way: 52.04 GTexel/s for AMD versus 26.98 GTexel/s for NVIDIA. FP32 compute heavily favors AMD at 1.665 TFLOPS versus 863.2 GFLOPS; the Vega 10 Mobile also supports FP16 at 3.331 TFLOPS (2:1 ratio), while the K620 has no FP16 capability listed.

Power and physical attributes: the Vega 10 Mobile draws 10 W, is an IGP with no slot width, and has no power connectors. The K620 draws 45 W, is single-slot, measures 160 mm (6.3 inches) in length and 69 mm (2.7 inches) in height, and also has no power connectors but recommends a 200 W PSU. Display outputs differ: the Vega 10 Mobile's outputs are "Portable Device Dependent," while the K620 offers 1x DVI and 1x DisplayPort 1.2. Both are end-of-life, but the Vega 10 Mobile was released on 2019-01-07 while the K620 came out on 2014-07-21. The AMD part's predecessor is GCN 3.0 IGP with successor Navi II IGP; the NVIDIA part's predecessor is Quadro Fermi with successor Quadro Maxwell.

# FAQ

Q: Which GPU is faster in Geekbench OpenCL?

A: The NVIDIA Quadro K620 wins with a score of 6693, while the AMD Radeon Vega 10 Mobile scores 6476, a 3.2% deficit for the AMD part.

Q: Does the AMD Radeon Vega 10 Mobile have any compute advantage?

A: Yes. The Vega 10 Mobile delivers 1.665 TFLOPS of FP32 performance and 3.331 TFLOPS of FP16 (2:1), while the K620 offers 863.2 GFLOPS FP32 and no FP16 support. The AMD card also has 640 shading units versus 384.

Q: How do the memory configurations compare?

A: The K620 has 2 GB of DDR3 on a 128-bit bus with 28.80 GB/s bandwidth. The Vega 10 Mobile uses system-shared memory with no dedicated size, type, or bus width, and its bandwidth is listed as "System Dependent."

Q: Which card has better API support?

A: The Vega 10 Mobile supports DirectX 12 (12_1) and Vulkan 1.3, while the K620 supports DirectX 12 (11_0) and Vulkan 1.4. Both support OpenGL 4.6. The K620 has a recorded Vulkan benchmark score of 5870, while the Vega 10 Mobile does not have one.

Q: What are the power requirements for each card?

A: The Vega 10 Mobile has a 10 W TDP and no power connectors. The K620 has a 45 W TDP, no power connectors, and suggests a 200 W PSU.

Q: How do the two GPUs rank overall?

A: The Vega 10 Mobile sits at the 37th percentile of all GPUs, while the K620 sits at the 36th percentile. Their average benchmark scores are 6476 and 6282 respectively, and each is within 1.1% of its nearest rivals in the database.