NVIDIA GeForce GTX 770 vs NVIDIA GeForce GTX 965M Comparison

The NVIDIA GeForce GTX 770 and the NVIDIA GeForce GTX 965M represent two distinct approaches to the same silicon generation, separated by nearly two years of design philosophy. The GTX 770 is a desktop-first, high-power part aimed at performance enthusiasts, while the GTX 965M is a mobile-oriented module built for efficiency within a laptop chassis. The benchmark data shows a clear performance hierarchy, but the specifics of where and why the GTX 770 wins reveal a story about memory bandwidth, shading power, and the compromises inherent in mobile computing.

Head-to-Head Benchmarks

The head-to-head data is unambiguous: the GTX 770 wins both recorded benchmark comparisons, with a total of 2 wins to 0 for the GTX 965M. In the Geekbench OpenCL test, the GTX 770 scores 15,707 points against 14,509 for the GTX 965M, a decisive 8.3% advantage. This is not a marginal victory; it reflects a fundamental difference in raw compute throughput. The GTX 770's shading units are built for sustained high clocks, and its 3.333 TFLOPS of FP32 performance dwarfs the 1.946 TFLOPS of the GTX 965M. The OpenCL score gap is a direct consequence of that near-doubled floating-point capacity, making the 8.3% delta appear conservative relative to the theoretical compute disparity.

The Vulkan API test tells a more dramatic story. Here, the GTX 770 posts a score of 19,166, while the GTX 965M manages only 14,299. That is a 34% lead for the desktop card, a massive gulf in a modern graphics API. The reason for this staggering difference lies in memory architecture. The GTX 770 operates with a 256-bit memory bus delivering 224.4 GB/s of bandwidth, whereas the GTX 965M is constrained to a 128-bit bus with just 80.19 GB/s. In Vulkan workloads, which are often memory-latency sensitive and bandwidth hungry, the GTX 770's 2.8x bandwidth advantage becomes the dominant factor. The data indicates that the 965M, despite its newer Maxwell 2.0 architecture, cannot compensate for this memory throughput bottleneck.

Looking at the average benchmark scores, the GTX 770 achieves 14,747 points across all tests, placing it in the 57th percentile of all GPUs. The GTX 965M averages 14,404 points, sitting just one percentile lower at 56. This proximity in average scores is misleading, however, as the Vulkan test heavily skews the average upward for the GTX 770. The nearest rivals for the GTX 770 include the NVIDIA Quadro M2000 at 14,532 points and the AMD Radeon RX 5500 XT at 14,692 points, with the GTX 770 sitting just 0.4% above the latter. The GTX 965M, in contrast, is tightly clustered with iGPU-class parts like the AMD Radeon RX Vega 11 (14,385 points) and Intel Iris Xe MAX Graphics (14,315 points), showing that its performance level is closer to integrated solutions than to dedicated desktop cards.

In single-test terms, the GTX 770's OpenCL score of 15,707 is nearly 8% higher than its own average, suggesting that its compute-heavy design excels in that API. The GTX 965M's best result is its OpenCL score of 14,509, which is only 0.7% above its average, indicating a more balanced but lower overall capability. The Vulkan delta of 34% is the single largest margin in the entire comparison and should be the primary takeaway for anyone evaluating these cards for modern gaming or compute tasks.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA GeForce GTX 770, with an average score of 14,747 points compared to 14,404 points for the GTX 965M. This places the GTX 770 in the 57th percentile of all GPUs, while the GTX 965M sits in the 56th percentile.

Q: How large is the performance gap in the Vulkan API?

A: The GTX 770 leads by a substantial 34% in the Geekbench Vulkan test, scoring 19,166 against the GTX 965M's 14,299. This is the largest delta between the two cards in any benchmark.

Q: What is the memory bandwidth difference between the two cards?

A: The GTX 770 offers 224.4 GB/s of bandwidth over a 256-bit bus, while the GTX 965M is limited to 80.19 GB/s on a 128-bit bus. The GTX 770 provides roughly 2.8 times the memory throughput.

Q: Are these cards similar in raw compute performance?

A: No. The GTX 770 delivers 3.333 TFLOPS of FP32 performance, while the GTX 965M delivers only 1.946 TFLOPS. This represents a 71% advantage for the desktop card.

Q: How does the GTX 965M compare to integrated graphics rivals?

A: Its average score of 14,404 is just 0.1% above the AMD Radeon RX Vega 11 and 0.6% above the Intel Iris Xe MAX Graphics, indicating that its performance is in the same general tier as high-end integrated solutions.

Q: Which card has a higher boost clock?

A: The GTX 770 has a boost clock of 1085 MHz, compared to 950 MHz for the GTX 965M. The base clocks are 1046 MHz and 924 MHz, respectively.

The Verdict

The data clearly favors the NVIDIA GeForce GTX 770 for anyone prioritizing raw performance. It wins both head-to-head benchmarks, including a massive 34% margin in Vulkan, and holds a 2-0 win count. Its average score is 343 points higher than the GTX 965M's, and its nearest rivals include dedicated desktop cards like the AMD Radeon RX 5500 XT, whereas the GTX 965M competes with integrated graphics. The GTX 770 is the choice for desktop users who need maximum frame rates in modern APIs and compute-heavy workloads.

The GTX 965M, however, is not without a rationale. Its performance profile, while lower, is remarkably close to the GTX 770 in OpenCL (8.3% delta) and its overall percentile ranking (56 vs 57) is nearly identical. For a mobile user who cannot accommodate a dual-slot, 267 mm desktop card requiring a 550 W power supply, the MXM module form factor is the only practical option. The GTX 965M also supports DirectX 12 (12_1) and Vulkan 1.4, newer API revisions than the GTX 770's DirectX 12 (11_0) and Vulkan 1.2.175, making it more future-proof for software compatibility despite lower raw speed.

The verdict is straightforward: the GTX 770 wins on every performance metric measured, but the GTX 965M wins on portability and API modernity. The 34% Vulkan deficit is the deciding factor for gamers; the GTX 770 is the superior gaming card. The GTX 965M is only appropriate for those who absolutely require a mobile form factor and accept the bandwidth limitation as a necessary trade-off.

Specification Differences

The two cards diverge significantly in their memory subsystems. The GTX 770 uses a 256-bit bus with 2 GB of GDDR5 memory and delivers 224.4 GB/s bandwidth. The GTX 965M also has 2 GB of GDDR5, but its bus is narrowed to 128-bit, cutting bandwidth to 80.19 GB/s. This is the most consequential specification difference between the two.

Compute resources also differ substantially. The GTX 770 packs 1536 shading units, 128 texture mapping units, and 32 ROPs. The GTX 965M halves the TMU count to 64 and reduces shading units to 1024, while maintaining 32 ROPs. This results in pixel rates of 34.72 GPixel/s for the GTX 770 versus 30.40 GPixel/s for the GTX 965M, and texture rates of 138.9 GTexel/s versus 60.80 GTexel/s.

Clock speeds favor the GTX 770, with a base of 1046 MHz and boost of 1085 MHz, compared to 924 MHz base and 950 MHz boost for the GTX 965M. The memory clock is also faster on the GTX 770 at 1753 MHz (7 Gbps effective) versus 1253 MHz (5 Gbps effective) for the 965M.

Physical and power characteristics are starkly different. The GTX 770 is a dual-slot, 267 mm long, 111 mm tall, and 38 mm wide card with a 230 W TDP, requiring 1x 6-pin and 1x 8-pin power connectors and a 550 W suggested PSU. It outputs via 2x DVI, 1x HDMI 1.4a, and 1x DisplayPort 1.2. The GTX 965M is an MXM Module with no power connectors, no suggested PSU, and "Portable Device Dependent" display outputs, with no listed dimensions.

Architecture Differences

The GTX 770 is built on the Kepler architecture with the GK104 chip, while the GTX 965M uses the Maxwell 2.0 architecture with the GM204 chip. Both are fabricated on TSMC's 28 nm process, but the transistor counts differ: the GK104 contains 3,540 million transistors on a 294 mm² die, yielding a density of 12.0M / mm². The GM204 is a larger chip at 398 mm² with 5,200 million transistors, achieving a higher density of 13.1M / mm².

The Maxwell 2.0 architecture in the GTX 965M introduces a more efficient scheduling design than Kepler, which partially explains how it achieves competitive average scores with fewer shading units and lower clocks. However, the GTX 770's Kepler design is not without merit; its higher clock speeds and wider memory interface compensate for the older architecture's lower instructions-per-clock efficiency.

API support differences are notable. The GTX 770 supports DirectX 12 (11_0) and Vulkan 1.2.175, while the GTX 965M supports DirectX 12 (12_1) and Vulkan 1.4. The Maxwell card also has a newer OpenGL version at 4.6, matching the GTX 770's 4.6. The GTX 965M's DirectX 12_1 feature level includes conservative rasterization and other advanced features absent from the GTX 770's 11_0 support.

The GTX 965M's generation is GeForce 900M, with a release date of 2015-01-08, succeeding GeForce 800M and preceding GeForce 10 Mobile. The GTX 770 belongs to the GeForce 700 generation, released 2013-05-29, succeeding GeForce 600 and preceding GeForce 900. The GTX 770 has a launch MSRP of 399 USD, while the GTX 965M has no recorded MSRP. The GTX 770's predecessor is GeForce 600, while the GTX 965M's is GeForce 800M, and both are end-of-life production status.