NVIDIA GeForce GTX 675M vs NVIDIA T600 Comparison

The NVIDIA T600 and the NVIDIA GeForce GTX 675M represent two very different eras of GPU design, and the benchmark data reflects a clear generational shift. The T600 is the definitive winner in the only direct head-to-head comparison available, delivering a 301.3% higher score in Geekbench OpenCL. However, the GTX 675M’s legacy as a mobile powerhouse from 2012 is still relevant in specific legacy contexts, even if its raw compute capabilities are now far behind. The data shows a decisive victory for the newer Turing-based card, but the older Fermi part remains a point of reference for its era.

Where Each One Wins

The NVIDIA T600 wins outright in every measurable category where both cards have benchmark data. The sole head-to-head benchmark, Geekbench OpenCL, shows the T600 scoring 27,875 against the GTX 675M’s 6,946. This is not a marginal victory; it is a 301.3% advantage, indicating that the T600 is over four times faster in this compute-oriented workload. This single metric alone establishes the T600 as the superior choice for any application that leverages OpenCL acceleration, including video encoding, scientific simulations, and general-purpose GPU computing.

The GTX 675M, conversely, does not win a single benchmark in the direct comparison. Its only listed score is that same Geekbench OpenCL result of 6,946, which places it behind the T600 and also behind its own nearest rivals like the NVIDIA GeForce GTX 680M (7,023) and the AMD Radeon R5 M240 (6,975). The data suggests that the GTX 675M’s wins, if any, would have to come from scenarios not covered by the provided benchmarks, such as older DirectX 9 or DirectX 10 titles where its Fermi architecture might have had more optimized drivers. However, with no data to support such a claim, the verdict is clear: the T600 is the performance leader across the board.

The T600’s advantage is not just about raw speed. Its Passmark G3D score of 6,479 and its average benchmark score of 7,035 are both significantly higher than the GTX 675M’s average of 6,946. While the GTX 675M’s average is pulled up by its proximity to the GTX 680M in the rankings, the T600’s performance profile is more consistent across different types of workloads, from compute (Passmark GPU Compute score of 2,402) to 2D rendering (Passmark G2D score of 756). The GTX 675M, with only a single data point, cannot demonstrate such versatility.

Architecture Differences

The architectural gap between these two GPUs is vast, and it explains the performance disparity. The T600 is built on the Turing architecture using a 12 nm process at TSMC, while the GTX 675M uses the older Fermi 2.0 architecture on a 40 nm process. This process difference alone is significant: the T600 packs 4,700 million transistors into a 200 mm² die, resulting in a transistor density of 23.5 million per mm². The GTX 675M, by contrast, has only 1,950 million transistors spread across a much larger 332 mm² die, giving it a density of just 5.9 million per mm². This means the T600 is not only more power-efficient but also physically more complex.

The core configurations reflect these architectural differences. The T600 has 640 shading units, 40 texture mapping units (TMUs), and 32 raster output units (ROPs). The GTX 675M has 384 shading units and 64 TMUs, but also 32 ROPs. While the GTX 675M has more TMUs, the T600’s higher clock speeds and newer architecture more than compensate. The T600’s boost clock is 1,335 MHz, while the GTX 675M has no listed base or boost clock, only a memory clock of 750 MHz. This lack of clock data for the GTX 675M makes direct frequency comparison impossible, but the T600’s pixel rate of 42.72 GPixel/s and texture rate of 53.40 GTexel/s dwarf the GTX 675M’s 9.92 GPixel/s and 39.68 GTexel/s, respectively.

Memory is another major differentiator. The T600 uses 4 GB of GDDR6 memory on a 128-bit bus, achieving a bandwidth of 160.0 GB/s. The GTX 675M uses 2 GB of GDDR5 memory on a wider 256-bit bus, but its bandwidth is only 96.00 GB/s. The T600’s newer memory technology and higher effective speed of 10 Gbps give it a 66.7% bandwidth advantage over the GTX 675M’s 3 Gbps effective speed. This is crucial for modern workloads that are memory-bandwidth hungry, such as high-resolution textures and complex shaders.

The Verdict

The NVIDIA T600 is the clear choice for any modern workload. Its 301.3% lead in Geekbench OpenCL over the GTX 675M is not an outlier but a reflection of its superior architecture across the board. The T600’s higher average benchmark score of 7,035, compared to the GTX 675M’s 6,946, puts it in a different performance class, even though both cards occupy the same 39th percentile in the global GPU rankings. The T600’s 4 GB of GDDR6 memory, higher bandwidth, and support for DirectX 12 (12_1) and Vulkan 1.4 make it suitable for contemporary applications and APIs. Its 40 W TDP and single-slot design also make it a far more practical option for modern systems.

The GTX 675M should only be considered for legacy systems or specific use cases where its MXM module form factor is required. Its 100 W TDP is higher than the T600’s 40 W, and its lack of Vulkan support and older DirectX 12 (11_0) feature level limit its compatibility with modern software. While its 2 GB of memory might suffice for older titles, the 96.00 GB/s bandwidth is a bottleneck. The data does not support any scenario where the GTX 675M outperforms the T600, so the recommendation is straightforward: choose the T600 for any new build or upgrade path.

FAQ

Q: Which GPU is faster in OpenCL compute tasks?

A: The NVIDIA T600 is dramatically faster, scoring 27,875 in Geekbench OpenCL compared to the GTX 675M’s 6,946, a 301.3% difference.

Q: Do both cards support the same modern APIs?

A: No. The T600 supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4. The GTX 675M supports DirectX 12 (11_0) and OpenGL 4.6, but has no Vulkan support.

Q: How do their memory configurations compare?

A: The T600 has 4 GB of GDDR6 memory on a 128-bit bus with 160.0 GB/s bandwidth. The GTX 675M has 2 GB of GDDR5 on a 256-bit bus with 96.00 GB/s bandwidth.

Q: Which card has a higher transistor density?

A: The T600 has a density of 23.5 million transistors per mm², while the GTX 675M has only 5.9 million per mm².

Q: What is the power consumption difference?

A: The T600 has a TDP of 40 W, while the GTX 675M has a TDP of 100 W.

Q: Is the GTX 675M ever faster than the T600?

A: Based on the available data, no. The GTX 675M does not win any benchmark in the head-to-head comparison, and its only score is significantly lower than the T600’s.

Head-to-Head Benchmarks

The only direct comparison in the data is the Geekbench OpenCL test, and it is a landslide. The NVIDIA T600 scores 27,875, while the NVIDIA GeForce GTX 675M scores 6,946. This results in a delta of 301.3%, meaning the T600 is roughly four times faster. This is the single most important data point in this comparison, as it encapsulates the combined benefits of the T600’s newer architecture, higher clocks, and faster memory.

Looking at the broader benchmark landscape, the T600’s other scores reinforce this dominance. Its Passmark G3D score of 6,479 is not directly comparable to the GTX 675M’s Geekbench score, but its average benchmark score of 7,035 is higher than the GTX 675M’s 6,946. The T600 also shows strength in specific tests: its Passmark DirectX 9 score of 114 and DirectX 11 score of 49 indicate a robust legacy API performance, while its Passmark GPU Compute score of 2,402 highlights its compute potential. The GTX 675M has no such data to counter these numbers.

The T600’s wins are not just about higher numbers; they are about the quality of those numbers. For instance, its pixel rate of 42.72 GPixel/s is over four times higher than the GTX 675M’s 9.92 GPixel/s. Its texture rate of 53.40 GTexel/s is also significantly higher than the GTX 675M’s 39.68 GTexel/s. These metrics translate directly to real-world performance in games and rendering applications. The verdict from the data is unambiguous: the T600 wins the head-to-head by a wide margin.

Specification Differences

The specification sheets for these two GPUs highlight their generational divide. The most obvious difference is the process node: the T600 is built on a 12 nm process, while the GTX 675M uses a 40 nm process. This leads to a massive difference in transistor count and density. The T600 has 4,700 million transistors on a 200 mm² die, while the GTX 675M has 1,950 million on a 332 mm² die. The T600’s transistor density of 23.5M / mm² is nearly four times that of the GTX 675M’s 5.9M / mm².

Clock speeds are also a point of divergence, though the GTX 675M lacks base and boost clock data. The T600 has a base clock of 735 MHz and a boost clock of 1,335 MHz. The GTX 675M only lists a memory clock of 750 MHz (3 Gbps effective), which is far lower than the T600’s memory clock of 1,250 MHz (10 Gbps effective). This clock advantage, combined with the architectural improvements, gives the T600 a significant edge in both pixel rate (42.72 GPixel/s vs 9.92 GPixel/s) and texture rate (53.40 GTexel/s vs 39.68 GTexel/s).

Memory and power are other key differentiators. The T600 has 4 GB of GDDR6 memory with a 128-bit bus and 160.0 GB/s bandwidth, while the GTX 675M has 2 GB of GDDR5 with a 256-bit bus and 96.00 GB/s bandwidth. The T600’s TDP is 40 W, compared to the GTX 675M’s 100 W. Finally, the bus interface and form factor differ: the T600 uses PCIe 3.0 x16 and is a single-slot card with four mini-DisplayPort 1.4a outputs, while the GTX 675M is an MXM Module with a portable-device-dependent display output. These differences make the T600 a more versatile and efficient solution for modern systems.