NVIDIA GeForce GTX 770M vs NVIDIA Quadro K620 Comparison

Head-to-Head Benchmarks

The single benchmark available for direct comparison — Geekbench OpenCL — delivers a decisive win for the NVIDIA GeForce GTX 770M. The laptop-oriented GPU scores 8,552 points, which is 21.7% higher than the NVIDIA Quadro K620’s 6,693 points. That is not a marginal gap; it is a substantive performance advantage in compute workloads that favor the GTX 770M’s larger shader array and faster memory subsystem.

Digging into the broader benchmark context, the Quadro K620’s average benchmark score of 6,282 places it in the 36th percentile of all GPUs. Its nearest rivals in the database include the NVIDIA GeForce RTX 5070 Ti SUPER and the NVIDIA GeForce RTX 4070 Ti SUPER AD102, both of which sit at 6,270 points — a mere 0.2% behind. The AMD Radeon R7 M350 (6,327 points) and AMD Radeon Pro WX 4100 (6,330 points) are 0.7% and 0.8% ahead, respectively. This clustering shows the Quadro K620 is essentially at parity with a range of very different GPUs, from modern high-end cards to entry-level mobile parts.

The GeForce GTX 770M, meanwhile, posts an average benchmark score of 6,000, landing in the 35th percentile. Its nearest rivals include the AMD Radeon RX 6400 (6,001 points, 0% delta), the NVIDIA RTX PRO 6000 Blackwell Server (5,996 points, 0.1% ahead), the AMD FirePro W4100 (5,987 points, 0.2% behind), and the NVIDIA Quadro K4000M (5,986 points, 0.2% behind). The GTX 770M is essentially tied with the RX 6400, a much more modern discrete card, which speaks to the 770M’s raw compute strength in this particular benchmark suite.

The head-to-head OpenCL result is the only direct comparison available, and it favors the GTX 770M by a clear margin. However, the average benchmark scores tell a slightly different story: the Quadro K620’s average of 6,282 is 4.7% higher than the GTX 770M’s 6,000. This discrepancy suggests the two GPUs excel under different conditions — the GTX 770M wins the specific OpenCL test, but the Quadro K620 holds a higher average across all recorded benchmarks in the database.

The Geekbench Vulkan score for the Quadro K620 is 5,870, while the GTX 770M has no Vulkan result listed. Conversely, the GTX 770M has a Geekbench Metal score of 3,448, which the Quadro K620 does not have. These platform-specific results further indicate that the two cards were designed for different ecosystems: the Quadro for professional workstation environments with broader API support, and the GTX 770M for consumer laptops where Metal on macOS might be relevant.

The Verdict

The data points to a simple conclusion: the NVIDIA GeForce GTX 770M is the faster GPU in raw compute performance. The 21.7% OpenCL advantage is substantial and consistent with its hardware specifications — more shading units, more texture mapping units, more ROPs, and significantly higher memory bandwidth. If the task is purely about compute throughput in OpenCL, the GTX 770M wins outright.

However, the Quadro K620’s higher average benchmark score (6,282 vs. 6,000) and better percentile ranking (36th vs. 35th) indicate that it holds up better across a wider range of workloads. The Quadro also supports Vulkan 1.4, compared to the GTX 770M’s Vulkan 1.2.175, which gives it a modern API advantage that could matter for future-proofing in certain applications.

For a professional workstation user who needs a single-slot card with DisplayPort 1.2 output and PCIe 2.0 x16 compatibility, the Quadro K620 is the appropriate choice. Its 45W TDP allows for passive or low-profile cooling solutions, and the lack of power connectors means it will fit into almost any workstation chassis. The GTX 770M, being an MXM module, is not a drop-in replacement for any desktop system — it is designed for laptops and requires a compatible MXM-B (3.0) slot.

For a laptop user seeking maximum compute performance in OpenCL applications, the GTX 770M delivers more raw power. Its 3 GB of GDDR5 memory with 96.19 GB/s bandwidth is a clear upgrade over the Quadro K620’s 2 GB of DDR3 with 28.80 GB/s. The 192-bit memory bus versus 128-bit further reinforces the GTX 770M’s memory advantage.

The verdict is straightforward: the GTX 770M wins on raw performance, the Quadro K620 wins on versatility and platform compatibility. Neither card is a clear overall winner — it depends entirely on the use case.

Architecture Differences

The two GPUs come from different NVIDIA architectures, which explains many of their performance characteristics. The Quadro K620 is built on the Maxwell architecture using the GM107 chip, while the GTX 770M uses the older Kepler architecture with the GK106 chip. Despite this architectural generational difference, both are fabricated on the same 28 nm process node at TSMC.

The transistor counts differ notably: the GTX 770M’s GK106 packs 2,540 million transistors on a 221 mm² die, while the Quadro K620’s GM107 has 1,870 million transistors on a much smaller 148 mm² die. This means the GK106 has a lower transistor density (11.5 million per mm²) compared to the GM107 (12.6 million per mm²), even though the Kepler chip is physically larger and has more transistors overall.

The Maxwell architecture in the Quadro K620 is a newer design that emphasizes efficiency per watt, which is reflected in its 45W TDP versus the GTX 770M’s 75W. The GTX 770M compensates with far more execution resources: 960 shading units versus 384, 80 texture mapping units versus 24, and 24 ROPs versus 16. These are massive differences that explain the GTX 770M’s compute advantage.

Memory architecture also diverges sharply. The Quadro K620 uses 2 GB of DDR3 on a 128-bit bus with 28.80 GB/s bandwidth. The GTX 770M uses 3 GB of GDDR5 on a 192-bit bus, delivering 96.19 GB/s — more than three times the bandwidth. The memory clock rates reflect this: the Quadro runs at 900 MHz (1800 Mbps effective) while the GTX 770M runs at 1002 MHz (4 Gbps effective).

Clock speeds tell the opposite story. The Quadro K620 has a base clock of 1058 MHz and a boost clock of 1124 MHz, significantly higher than the GTX 770M’s 706 MHz base and 797 MHz boost. This clock advantage helps the Quadro partially close the gap in raw throughput, but not enough to overcome the GTX 770M’s superior hardware resources.

API support also differs. Both support DirectX 12 (11_0) and OpenGL 4.6, but the Quadro K620 supports Vulkan 1.4 while the GTX 770M is limited to Vulkan 1.2.175. The Quadro also has a DisplayPort 1.2 output, while the GTX 770M’s display outputs are listed as "Portable Device Dependent," reflecting its laptop-oriented design.

Specification Differences

The table below highlights the key specification differences between the two GPUs:

| Specification | NVIDIA Quadro K620 | NVIDIA GeForce GTX 770M |

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

| Architecture | Maxwell | Kepler |

| Chip | GM107 | GK106 |

| Transistors | 1,870 million | 2,540 million |

| Die Size | 148 mm² | 221 mm² |

| Transistor Density | 12.6M / mm² | 11.5M / mm² |

| Base Clock | 1058 MHz | 706 MHz |

| Boost Clock | 1124 MHz | 797 MHz |

| Memory Size | 2 GB | 3 GB |

| Memory Type | DDR3 | GDDR5 |

| Memory Bus Width | 128 bit | 192 bit |

| Memory Bandwidth | 28.80 GB/s | 96.19 GB/s |

| Memory Clock | 900 MHz (1800 Mbps effective) | 1002 MHz (4 Gbps effective) |

| Shading Units | 384 | 960 |

| TMUs | 24 | 80 |

| ROPs | 16 | 24 |

| Pixel Rate | 17.98 GPixel/s | 15.94 GPixel/s |

| Texture Rate | 26.98 GTexel/s | 63.76 GTexel/s |

| FP32 | 863.2 GFLOPS | 1.530 TFLOPS |

| TDP | 45 W | 75 W |

| Slot Width | Single-slot | MXM Module |

| Bus Interface | PCIe 2.0 x16 | MXM-B (3.0) |

| Display Outputs | 1x DVI, 1x DisplayPort 1.2 | Portable Device Dependent |

| Vulkan | 1.4 | 1.2.175 |

| Release Date | 2014-07-21 | 2013-05-29 |

| Predecessor | Quadro Fermi | GeForce 600M |

| Successor | Quadro Maxwell | GeForce 800M |

The GTX 770M has a clear advantage in raw computational resources — more shading units, TMUs, ROPs, and much higher memory bandwidth. The Quadro K620 counters with higher clock speeds, a more efficient architecture, and a substantially lower TDP. The GTX 770M also has 1 GB more memory and a wider memory bus.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA Quadro K620 has a higher average benchmark score of 6,282, compared to the NVIDIA GeForce GTX 770M’s 6,000. The Quadro also ranks slightly better in the 36th percentile versus the GTX 770M’s 35th percentile.

Q: Why does the GeForce GTX 770M win the OpenCL benchmark?

A: The GTX 770M scores 8,552 in Geekbench OpenCL, which is 21.7% higher than the Quadro K620’s 6,693. This is likely due to its 960 shading units, 80 TMUs, and 96.19 GB/s memory bandwidth, all of which are substantially higher than the Quadro’s 384 shading units, 24 TMUs, and 28.80 GB/s bandwidth.

Q: Does the Quadro K620 support newer APIs than the GTX 770M?

A: Yes. The Quadro K620 supports Vulkan 1.4, while the GTX 770M is limited to Vulkan 1.2.175. Both support DirectX 12 (11_0) and OpenGL 4.6.

Q: Which GPU is more power-efficient?

A: The Quadro K620 has a TDP of 45 W, while the GTX 770M has a TDP of 75 W. The Quadro also uses a smaller 148 mm² die with 1,870 million transistors, versus the GTX 770M’s 221 mm² die with 2,540 million transistors.

Q: Can the GeForce GTX 770M be used in a desktop workstation?

A: No. The GTX 770M is an MXM Module with an MXM-B (3.0) bus interface, designed for laptops. Its display outputs are listed as "Portable Device Dependent," meaning it requires a specific laptop chassis. The Quadro K620 is a single-slot card with a PCIe 2.0 x16 interface that fits standard desktop motherboards.

Q: How do these GPUs compare to their nearest rivals?

A: The Quadro K620 is nearly identical in average score to the NVIDIA GeForce RTX 5070 Ti SUPER and RTX 4070 Ti SUPER AD102 (both 6,270, 0.2% behind), while being 0.7% behind the AMD Radeon R7 M350 and 0.8% behind the AMD Radeon Pro WX 4100. The GTX 770M is exactly tied with the AMD Radeon RX 6400 (6,001, 0% delta), 0.1% behind the NVIDIA RTX PRO 6000 Blackwell Server, and 0.2% ahead of both the AMD FirePro W4100 and NVIDIA Quadro K4000M.

Where Each One Wins

The GeForce GTX 770M is the clear winner in raw compute performance. The 21.7% OpenCL lead, combined with its 1.530 TFLOPS FP32 throughput versus the Quadro K620’s 863.2 GFLOPS, makes it the better choice for heavy parallel workloads such as rendering, scientific computing, or any application that leverages OpenCL acceleration. Its 3 GB of GDDR5 memory on a 192-bit bus provides 96.19 GB/s of bandwidth, which is critical for memory-intensive tasks like large texture loads or data processing. The GTX 770M also has a higher texture rate (63.76 GTexel/s vs. 26.98 GTexel/s), making it more capable in texture-heavy graphics workloads.

The Quadro K620 wins in efficiency and platform flexibility. Its 45W TDP is 40% lower than the GTX 770M’s 75W, making it far easier to cool in a compact workstation. The single-slot form factor with PCIe 2.0 x16 compatibility means it can be installed in virtually any desktop system, whereas the GTX 770M is locked into MXM-B laptop slots. The Quadro also supports Vulkan 1.4, which provides access to newer graphics features and better compatibility with modern applications. Its higher base and boost clocks (1058 MHz and 1124 MHz vs. 706 MHz and 797 MHz) help it maintain competitive performance per watt, and its higher average benchmark score of 6,282 suggests it performs more consistently across a broader range of tests.

In terms of memory, the GTX 770M wins decisively — higher capacity (3 GB vs. 2 GB), faster type (GDDR5 vs. DDR3), wider bus (192-bit vs. 128-bit), and more than three times the bandwidth (96.19 GB/s vs. 28.80 GB/s). The Quadro K620’s higher pixel rate (17.98 GPixel/s vs. 15.94 GPixel/s) is one area where it edges out the GTX 770M, which could matter in fill-rate-limited scenarios.

For a professional workstation performing CAD, simulation, or professional visualization, the Quadro K620’s lower power draw, standard PCIe interface, and modern Vulkan support make it the more practical choice. For a laptop user who needs maximum compute performance in OpenCL-based applications, the GTX 770M is the stronger performer. The data does not support a single "best" card — it supports two different cards for two different jobs.