NVIDIA GeForce 830M vs NVIDIA GeForce GT 545 Comparison

The NVIDIA GeForce 830M and NVIDIA GeForce GT 545 represent two distinct eras of NVIDIA mobile and desktop graphics. The 830M is a Maxwell-based laptop part from 2014, while the GT 545 is a Fermi 2.0 desktop card from 2011. Benchmark data shows a clear overall winner, but the story is more nuanced when examining architectural philosophies and specific use cases.

Head-to-Head Benchmarks

The only direct benchmark comparison available is Geekbench OpenCL, and it decisively favors the newer GeForce 830M. The 830M scores 4,324 points, while the GT 545 manages 3,594 points. This translates to a 20.3% advantage for the 830M in raw compute performance. This is a substantial gap, indicating that the architectural efficiency of Maxwell provides a significant generational leap over the older Fermi design, even though the GT 545 has a wider memory bus and more ROPs.

Looking at the broader benchmark landscape, the 830M’s average score across all tests is 3,957, placing it in the 24th percentile of all GPUs. Its nearest rivals include the AMD Radeon R5 M420 (3,956, a 0% delta), the NVIDIA GeForce GT 745M (3,953, a 0.1% delta), and the NVIDIA Quadro K2000 (3,964, a -0.2% delta). This places it in a very tight cluster of performance, essentially trading blows with those parts. The GT 545, by contrast, has an average score of 3,594 and sits in the 21st percentile. Its closest competitors are the NVIDIA RTX 5000 Mobile Ada Generation (3,596, a -0.1% delta) and the NVIDIA GeForce GT 735M (3,616, a -0.6% delta). The data suggests the 830M sits roughly 10% higher in overall average score than the GT 545.

The victory is not just a matter of raw score; it is a consistent one. In the head-to-head comparison, the 830M wins the single benchmark available, securing 1 win to the GT 545's 0. While the GT 545 does have a higher pixel rate and texture rate in its specifications, the actual compute benchmark indicates the 830M’s architecture is more efficient at executing the workloads tested. The 20.3% delta in OpenCL is a strong indicator that the newer part’s higher shading unit count and clock speeds overcome the older card’s memory bandwidth advantage.

Where Each One Wins

The GeForce 830M wins in compute-oriented tasks, as evidenced by its OpenCL performance. Its 256 shading units, running at a base clock of 1082 MHz and a boost clock of 1150 MHz, deliver 588.8 GFLOPS of FP32 performance. This is significantly higher than the GT 545’s 414.7 GFLOPS, which comes from just 144 shading units. For applications that rely on general-purpose GPU computing, such as video encoding or physics simulations, the 830M is the clear winner. Its 14.40 GB/s of memory bandwidth, while narrow, is sufficient for its compute capabilities.

The GeForce GT 545, on the other hand, is not without its strengths. Its 192-bit memory bus provides 38.40 GB/s of bandwidth, which is over 2.6 times that of the 830M. This suggests it could be better suited for certain memory-intensive tasks, such as large texture loads or high-resolution frame buffers. Additionally, it has 16 ROPs and 24 TMUs, compared to the 830M’s 8 ROPs and 16 TMUs. This gives the GT 545 a higher pixel rate of 4.320 GPixel/s and a texture rate of 17.28 GTexel/s. However, the 830M’s texture rate of 18.40 GTexel/s is actually higher, and its pixel rate of 9.200 GPixel/s is more than double. The GT 545’s advantage is purely in memory bandwidth, not in output processing.

For gaming, the data is less clear-cut. The GT 545’s higher bandwidth could help at higher resolutions with more texture detail. However, the 830M’s superior compute and fill rates suggest it would handle modern shader-heavy workloads better. The GT 545’s 1536 MB of memory is also less than the 830M’s 2 GB, which could be a limiting factor in newer games. Ultimately, the 830M wins on compute and pixel throughput, while the GT 545 only leads in raw memory bandwidth.

Architecture Differences

The architectural divide between these two GPUs is stark. The GeForce 830M is built on the Maxwell architecture, using the GM108 chip manufactured on a 28 nm process at TSMC. This allows for a transistor density of 13.2M per mm², packing 1,020 million transistors into a small 77 mm² die. The GeForce GT 545, in contrast, uses the Fermi 2.0 architecture with the GF116 chip, built on a 40 nm process, also at TSMC. This results in a much lower transistor density of 4.9M per mm², with 1,170 million transistors spread across a larger 238 mm² die. The 28 nm process is a key factor in the 830M’s efficiency, allowing for higher clocks and lower power draw.

The 830M features 256 shading units, 16 TMUs, and 8 ROPs. The GT 545 has fewer shading units at 144, but more TMUs (24) and ROPs (16). This reflects a fundamental design difference: Maxwell focuses on many small, efficient cores, while Fermi 2.0 uses fewer, more complex cores with a wider memory interface. The memory subsystems also differ greatly. The 830M uses a 64-bit bus with DDR3 memory at 900 MHz (1800 Mbps effective), while the GT 545 uses a 192-bit bus with DDR3 memory at 800 MHz (1600 Mbps effective). The wider bus is the GT 545’s primary architectural advantage.

Feature support also diverges. The 830M supports Vulkan 1.4, while the GT 545 has no Vulkan support listed. Both support DirectX 12 (11_0) and OpenGL 4.6. The 830M’s support for modern APIs like Vulkan is a significant advantage for compatibility with newer software. The GT 545’s lack of Vulkan support means it cannot run applications that require it. The 830M also uses a PCIe 3.0 x8 interface, whereas the GT 545 uses PCIe 2.0 x16. While the x16 interface has more lanes, the newer PCIe 3.0 standard on the 830M offers higher bandwidth per lane, potentially negating the disadvantage.

Specification Differences

The two GPUs differ across nearly every core specification. The most obvious difference is memory capacity: the 830M has 2 GB, while the GT 545 has 1536 MB. Memory type is the same (DDR3), but the bus width differs significantly, with the 830M at 64-bit and the GT 545 at 192-bit. This leads to a massive difference in bandwidth, with the GT 545’s 38.40 GB/s dwarfing the 830M’s 14.40 GB/s.

Clock speeds are also distinct. The 830M has a base clock of 1082 MHz and a boost clock of 1150 MHz, which are not present for the GT 545. The GT 545’s memory clock is 800 MHz (1600 Mbps effective), which is lower than the 830M’s 900 MHz (1800 Mbps effective). Compute capabilities differ, with the 830M delivering 588.8 GFLOPS versus the GT 545’s 414.7 GFLOPS. The pixel and texture rates also favor the 830M, at 9.200 GPixel/s and 18.40 GTexel/s, respectively, versus the GT 545’s 4.320 GPixel/s and 17.28 GTexel/s.

Power and physical specs are a major differentiator. The 830M has a TDP of 33 W and is an IGP (integrated graphics processor) with no power connectors, making it suitable for laptops. The GT 545 has a TDP of 70 W, is a single-slot card, and also has no power connectors, but it recommends a 250 W power supply. The GT 545 is a physical card measuring 145 mm (5.7 inches) in length, whereas the 830M is portable-device dependent. The bus interface differs, with the 830M using PCIe 3.0 x8 and the GT 545 using PCIe 2.0 x16. The GT 545 has a launch MSRP of 149 USD. The 830M has no launch MSRP listed. The release dates are also far apart, with the GT 545 launching on 2011-05-13 and the 830M on 2014-03-11.

FAQ

Q: Which GPU is faster in compute benchmarks?

A: The NVIDIA GeForce 830M is significantly faster. In the Geekbench OpenCL test, it scores 4,324 points versus the GT 545’s 3,594 points, a 20.3% advantage. Its average benchmark score is also higher at 3,957 versus 3,594.

Q: Does the GT 545 have any advantages over the 830M?

A: Yes, the GT 545 has a much wider 192-bit memory bus, providing 38.40 GB/s of bandwidth compared to the 830M’s 64-bit bus and 14.40 GB/s. This could benefit memory-intensive tasks, though it does not translate to a win in the available compute benchmark.

Q: What are the key architectural differences?

A: The 830M uses the Maxwell architecture on a 28 nm process, while the GT 545 uses the older Fermi 2.0 architecture on a 40 nm process. The 830M has more shading units (256 vs 144) and a higher transistor density (13.2M / mm² vs 4.9M / mm²).

Q: Which GPU supports more modern software APIs?

A: The GeForce 830M supports Vulkan 1.4, while the GT 545 has no Vulkan support listed. Both support DirectX 12 (11_0) and OpenGL 4.6.

Q: How do their power requirements differ?

A: The 830M has a TDP of 33 W and is an IGP, while the GT 545 has a TDP of 70 W and is a single-slot card that recommends a 250 W power supply. This makes the 830M far more power-efficient.

Q: What are the closest competitors for each GPU based on average score?

A: The 830M’s closest rivals are the AMD Radeon R5 M420 (3,956, 0% delta) and the NVIDIA GeForce GT 745M (3,953, 0.1% delta). The GT 545’s closest rival is the NVIDIA GeForce GT 735M (3,616, -0.6% delta).

The Verdict

The data strongly indicates that the NVIDIA GeForce 830M is the superior performer for general compute workloads. Its 20.3% lead in OpenCL benchmarks, higher average score, and better feature support make it the logical choice for anyone prioritizing raw processing power and modern API compatibility. Its higher pixel rate (9.200 GPixel/s vs 4.320 GPixel/s) and texture rate (18.40 GTexel/s vs 17.28 GTexel/s) further cement its position in rendering tasks.

The GeForce GT 545 is not without merit. Its 192-bit memory bus and 38.40 GB/s of bandwidth are its standout features, offering more than double the memory bandwidth of the 830M. For specific workloads that are heavily dependent on memory throughput rather than shader compute, the GT 545 could potentially hold its own. However, the lack of Vulkan support and lower compute scores make it a harder recommendation for modern software.

The choice hinges on the user’s priorities. For a mobile or power-constrained system, the 830M is the clear winner, offering better performance at less than half the TDP (33 W vs 70 W). For a desktop user with a specific need for high memory bandwidth and who is working with older software, the GT 545 might be a usable, albeit outdated, option. The benchmark results, however, are unambiguous: the 830M is the faster and more future-proof GPU.