NVIDIA GeForce GTX 770M vs NVIDIA Quadro K620M Comparison

The Verdict

The benchmark data presents a clear but narrow picture: the NVIDIA GeForce GTX 770M wins the only shared head-to-head test, and it wins decisively. In Geekbench OpenCL, the GTX 770M scores 8552 against the Quadro K620M’s 5957, a 43.6% advantage. That single result, combined with the GTX 770M’s average benchmark score of 6000 versus the K620M’s 5957, suggests that for raw compute workloads, the GTX 770M is the stronger part.

However, the Quadro K620M is not without its own merits. It consumes 30 W versus the GTX 770M’s 75 W, making it the more power-efficient option on paper. It also arrives later in the market (2015 versus 2013) and uses a newer Maxwell architecture, which brings a higher transistor density (13.2M per mm² versus 11.5M per mm²) and a higher base clock (1029 MHz versus 706 MHz). For users prioritizing lower power draw and architectural efficiency over raw throughput, the K620M holds appeal. For users who need maximum compute performance in OpenCL-accelerated tasks, the data points firmly to the GTX 770M. The GTX 770M also lands in the 35th percentile of all GPUs, slightly above the K620M’s 34th percentile, reinforcing its edge in overall standing.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA GeForce GTX 770M has an average benchmark score of 6000, while the NVIDIA Quadro K620M scores 5957. The difference is 43 points, or roughly 0.7%.

Q: How much faster is the GTX 770M in the shared OpenCL test?

A: In the Geekbench OpenCL test, the GTX 770M scores 8552 versus the K620M’s 5957, a 43.6% advantage for the GTX 770M.

Q: What is the power draw difference between the two?

A: The GTX 770M has a TDP of 75 W, while the K620M has a TDP of 30 W. The K620M draws less than half the power.

Q: Which GPU has more memory bandwidth?

A: The GTX 770M has a bandwidth of 96.19 GB/s, using 192-bit GDDR5 memory. The K620M has a bandwidth of 16.02 GB/s, using 64-bit DDR3 memory.

Q: Are both GPUs the same architecture?

A: No. The GTX 770M uses the Kepler architecture (chip GK106), while the K620M uses the Maxwell architecture (chip GM108S). Both are built on a 28 nm process at TSMC.

Q: Which GPU has a higher percentile ranking?

A: The GTX 770M sits at the 35th percentile of all GPUs, while the K620M sits at the 34th percentile.

Architecture Differences

The two GPUs come from different architectural generations. The GTX 770M is built on Kepler, using the GK106 chip, while the K620M uses Maxwell with the GM108S chip. Both are fabricated on a 28 nm process at TSMC, but the transistor counts differ sharply: the GTX 770M packs 2,540 million transistors on a 221 mm² die, giving a density of 11.5M transistors per mm². The K620M, by contrast, has 1,020 million transistors on a much smaller 77 mm² die, yielding a higher density of 13.2M per mm². This density gap reflects the architectural leap from Kepler to Maxwell, which allowed NVIDIA to fit more logic into a smaller area.

The compute resources reflect this divide. The GTX 770M features 960 shading units, 80 texture mapping units, and 24 ROPs. The K620M has 384 shading units, 16 TMUs, and 8 ROPs. These are large structural differences. The GTX 770M’s pixel rate is 15.94 GPixel/s versus the K620M’s 8.992 GPixel/s, and its texture rate is 63.76 GTexel/s versus 17.98 GTexel/s. In floating-point throughput, the GTX 770M delivers 1.530 TFLOPS of FP32 performance, while the K620M manages 863.2 GFLOPS. Neither part supports ray tracing or tensor cores, as both lack RT and tensor core counts in the data.

The K620M’s Maxwell architecture brings a higher clock speed: base 1029 MHz and boost 1124 MHz, versus the GTX 770M’s base 706 MHz and boost 797 MHz. That clock advantage, however, does not overcome the GTX 770M’s far larger execution resource pool. The K620M’s transistor density advantage (13.2M per mm² versus 11.5M) indicates a more efficient use of silicon, but the GTX 770M’s raw scale wins in throughput. Both GPUs support DirectX 12 (11_0) and OpenGL 4.6, but the K620M supports Vulkan 1.4 while the GTX 770M supports Vulkan 1.2.175.

Specification Differences

The specification sheets diverge on nearly every measurable field. Memory configurations differ completely: the GTX 770M has 3 GB of GDDR5 on a 192-bit bus, achieving 96.19 GB/s of bandwidth; the K620M has 2 GB of DDR3 on a 64-bit bus, achieving 16.02 GB/s. This is a six-fold bandwidth difference, which heavily favors the GTX 770M in memory-bound workloads.

Clock speeds favor the K620M: base 1029 MHz and boost 1124 MHz, versus the GTX 770M’s 706 MHz base and 797 MHz boost. Memory clock rates are near parity (1002 MHz for the GTX 770M, 1001 MHz for the K620M), but effective memory speed differs: 4 Gbps for the GTX 770M versus 2 Gbps for the K620M. The GTX 770M’s memory clock runs at twice the effective rate, compounding the bus width advantage.

Shader resources, as noted, are heavily in the GTX 770M’s favor: 960 shading units, 80 TMUs, and 24 ROPs versus 384 shading units, 16 TMUs, and 8 ROPs. The GTX 770M’s pixel rate is 15.94 GPixel/s versus 8.992 GPixel/s, and its texture rate is 63.76 GTexel/s versus 17.98 GTexel/s. FP32 throughput is 1.530 TFLOPS for the GTX 770M and 863.2 GFLOPS for the K620M.

Power and physical specs also differ. The GTX 770M has a TDP of 75 W; the K620M draws 30 W. Both are MXM modules with no power connectors, but the bus interfaces differ: MXM-B (3.0) for the GTX 770M and MXM-A (3.0) for the K620M. Both have portable-device-dependent display outputs. Release dates are about 21 months apart: the GTX 770M launched on May 29, 2013, and the K620M on February 28, 2015. Both are end-of-life products. The GTX 770M’s predecessors and successors are in the GeForce 600M and 800M lines, while the K620M follows Quadro Fermi-M and precedes Quadro Maxwell-M.

Head-to-Head Benchmarks

Only one benchmark appears in both GPUs’ result sets: Geekbench OpenCL. The GTX 770M scores 8552, and the K620M scores 5957. The delta is 43.6% in favor of the GTX 770M. That is a substantial margin, placing the GTX 770M well outside any statistical noise. The K620M’s average benchmark score of 5957 exactly matches its OpenCL score, which suggests the OpenCL result is its only recorded benchmark. The GTX 770M’s average of 6000 is pulled down by its other benchmark, Geekbench Metal, where it scores 3448 — a much lower result than its OpenCL figure. The average of 3448 and 8552 is 6000, confirming that the OpenCL score is the GTX 770M’s strong point.

The nearest rivals provide context. The GTX 770M’s average score of 6000 places it level with the AMD Radeon RX 6400 (6001, 0% delta) and the NVIDIA RTX PRO 6000 Blackwell Server (5996, 0.1% delta). It also edges out the AMD FirePro W4100 (5987, 0.2%) and the NVIDIA Quadro K4000M (5986, 0.2%). The K620M’s average of 5957 is essentially tied with the AMD Radeon HD 8730M (5955, 0%) and slightly behind the AMD Radeon HD 8750M (5970, -0.2%) and NVIDIA Quadro K4000 (5982, -0.4%). It leads the Intel UHD Graphics 730 (5929, 0.5%). In short, both GPUs sit in a crowded mid-range band, but the GTX 770M’s OpenCL spike gives it a distinct peak that the K620M cannot match.

Where Each One Wins

The GTX 770M wins in every compute-heavy metric that appears in the data. Its OpenCL score is 43.6% higher, its FP32 throughput is 1.530 TFLOPS versus 863.2 GFLOPS, and its memory bandwidth is 96.19 GB/s versus 16.02 GB/s. For workloads that stress parallel floating-point math — such as general-purpose GPU compute, physics simulations, or machine learning inference on OpenCL — the GTX 770M is the clear choice. Its larger memory pool (3 GB versus 2 GB) and wider bus (192-bit versus 64-bit) also give it an edge in tasks that need to shuffle large datasets. The GTX 770M’s 35th percentile ranking, one point above the K620M’s 34th, reflects this overall strength.

The K620M wins on efficiency and architectural modernity. It draws 30 W versus 75 W, which is a 60% reduction in power. For thin-and-light mobile workstations where thermal headroom is scarce, that difference is decisive. The K620M’s Maxwell architecture also brings a higher base clock (1029 MHz versus 706 MHz) and a higher transistor density (13.2M per mm² versus 11.5M), indicating a more modern design. Its Vulkan 1.4 support is ahead of the GTX 770M’s Vulkan 1.2.175, which could matter for compatibility with newer applications. The K620M’s later release date (2015 versus 2013) means it benefits from a newer driver and software ecosystem, though the data does not quantify driver performance.

For gaming or raw compute throughput, the GTX 770M is the stronger part. For power-constrained professional environments where the workload is lighter and the priority is battery life or thermal management, the K620M is the sensible pick. The data does not support a single universal recommendation; it supports a usage-based split. If the choice is between speed and efficiency, benchmark results say speed lives in the GTX 770M, and efficiency lives in the K620M.