Intel Iris Pro Graphics P580 vs NVIDIA GeForce GTX 675MX Comparison

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA GeForce GTX 675MX has a higher average benchmark score of 8427, while the Intel Iris Pro Graphics P580 scores 7170. The GTX 675MX sits at the 43rd percentile of all GPUs, while the Iris Pro P580 sits at the 39th percentile.

Q: How do the two compare in the Geekbench OpenCL test?

A: The GTX 675MX scores 10723 in Geekbench OpenCL, which is 18.1% ahead of the Iris Pro P580's score of 9082. This is the only head-to-head benchmark recorded between the two in the database.

Q: What is the memory configuration difference?

A: The GTX 675MX uses 2 GB of dedicated GDDR5 memory on a 256-bit bus with 115.2 GB/s bandwidth. The Iris Pro P580 uses System Shared memory with a System Shared bus width and System Dependent bandwidth, meaning it relies on the host system's memory.

Q: What are the power consumption figures for each GPU?

A: The GTX 675MX has a TDP of 100 W and is designed as an MXM Module. The Iris Pro P580 has a TDP of 15 W and is an integrated graphics processor (IGP), making it far more power-efficient.

Q: Which GPU supports more advanced DirectX features?

A: The Iris Pro P580 supports DirectX 12 (12_1), while the GTX 675MX supports DirectX 12 (11_0). The Iris Pro P580 also supports Vulkan 1.3, whereas the GTX 675MX supports Vulkan 1.2.175.

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

A: The GTX 675MX's nearest rival is the AMD Radeon 880M with an average score of 8436, a delta of -0.1%. The Iris Pro P580's nearest rival is the NVIDIA GeForce GTX 560 SE with an average score of 7171, a delta of 0%.

Where Each One Wins

The GTX 675MX wins the only recorded head-to-head benchmark. In Geekbench OpenCL, it posts 10723 against the Iris Pro P580's 9082, a margin of 18.1%. This makes the NVIDIA part the clear winner in compute-heavy workloads that utilize OpenCL.

However, the Iris Pro P580 has its own strengths. It supports DirectX 12 (12_1) compared to the GTX 675MX's DirectX 12 (11_0), giving it access to a higher feature level in modern graphics APIs. It also supports Vulkan 1.3, a newer version than the GTX 675MX's Vulkan 1.2.175. The Iris Pro P580 further offers a higher texture rate of 72.00 GTexel/s versus the GTX 675MX's 52.32 GTexel/s, indicating better texture fill throughput per clock.

The GTX 675MX wins on raw compute. Its FP32 performance is 1,255.7 GFLOPS, slightly ahead of the Iris Pro P580's 1,152.0 GFLOPS. It also has a higher pixel rate of 13.08 GPixel/s versus 9.000 GPixel/s. The NVIDIA part's dedicated memory gives it a bandwidth advantage of 115.2 GB/s, while the Intel part's bandwidth is System Dependent. For users running OpenCL-accelerated tasks, the GTX 675MX is the superior choice.

The Iris Pro P580 wins on efficiency and integration. Its 15 W TDP is dramatically lower than the GTX 675MX's 100 W. It is an IGP with a Ring Bus interface, requiring no power connectors, and its display outputs are Motherboard Dependent. This makes it suitable for compact, low-power systems where the GTX 675MX's MXM Module form factor and higher power draw would not fit.

Architecture Differences

The GTX 675MX is built on NVIDIA's Kepler architecture, using the GK104 chip manufactured on a 28 nm process at TSMC. It has 3,540 million transistors on a 294 mm² die, yielding a transistor density of 12.0M / mm². The Iris Pro P580 uses Intel's Generation 9.0 architecture, specifically the Skylake GT4e chip, manufactured on a 14 nm+ process at Intel. Its transistor count and die size are not recorded in the database.

The GTX 675MX has 960 shading units, 80 texture mapping units, and 32 ROPs. The Iris Pro P580 has 576 shading units, 72 TMUs, and only 9 ROPs. Despite fewer shading units, the Iris Pro P580 achieves a higher texture rate of 72.00 GTexel/s compared to the GTX 675MX's 52.32 GTexel/s, due to its higher boost clock of 1000 MHz versus the GTX 675MX's unspecified clock speeds.

The Iris Pro P580 supports FP16 compute at 2.304 TFLOPS (2:1), a feature not listed for the GTX 675MX. The GTX 675MX has a higher pixel rate of 13.08 GPixel/s, while the Iris Pro P580's is 9.000 GPixel/s. The GTX 675MX's memory subsystem uses dedicated GDDR5, while the Iris Pro P580 relies on System Shared memory, which is a fundamental architectural difference affecting bandwidth and latency.

The GTX 675MX is part of the GeForce 600M generation, with a release date in 2012. The Iris Pro P580 belongs to the HD Graphics-W (Skylake) generation, released in 2015. Both are end-of-life products. The GTX 675MX has a predecessor (GeForce 500M) and successor (GeForce 700M), while the Iris Pro P580 has no listed predecessor or successor.

Specification Differences

The two GPUs differ across nearly every recorded specification. The GTX 675MX uses a 28 nm process node at TSMC, while the Iris Pro P580 uses a 14 nm+ process at Intel. The GTX 675MX has 3,540 million transistors on a 294 mm² die, while the Iris Pro P580's transistor count and die size are not recorded.

Memory configuration is a major difference. The GTX 675MX has 2 GB of GDDR5 with a 256-bit bus and 115.2 GB/s bandwidth. The Iris Pro P580 uses System Shared memory with a System Shared bus and System Dependent bandwidth. The GTX 675MX's memory clock is 900 MHz (3.6 Gbps effective), while the Iris Pro P580's memory clock is System Shared.

Clock speeds differ significantly. The GTX 675MX has no recorded base or boost clock. The Iris Pro P580 has a base clock of 350 MHz and a boost clock of 1000 MHz. The GTX 675MX's shading units number 960, TMUs 80, and ROPs 32. The Iris Pro P580 has 576 shading units, 72 TMUs, and 9 ROPs.

Pixel rate is 13.08 GPixel/s for the GTX 675MX and 9.000 GPixel/s for the Iris Pro P580. Texture rate is 52.32 GTexel/s versus 72.00 GTexel/s. FP32 performance is 1,255.7 GFLOPS versus 1,152.0 GFLOPS. The Iris Pro P580 also has FP16 performance of 2.304 TFLOPS (2:1), which the GTX 675MX lacks.

TDP is 100 W for the GTX 675MX and 15 W for the Iris Pro P580. The GTX 675MX is an MXM Module with no power connectors, while the Iris Pro P580 is an IGP with no power connectors listed. The GTX 675MX uses an MXM-B (3.0) bus interface, while the Iris Pro P580 uses a Ring Bus.

API support differs: the GTX 675MX supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175. The Iris Pro P580 supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3. Display outputs are Portable Device Dependent for the GTX 675MX and Motherboard Dependent for the Iris Pro P580.

Head-to-Head Benchmarks

The database records one head-to-head benchmark between these two GPUs: Geekbench OpenCL. The GTX 675MX scores 10723, while the Iris Pro P580 scores 9082. This gives the GTX 675MX a win with a delta of 18.1%. This is a substantial margin, indicating that the NVIDIA part has a clear compute advantage in OpenCL workloads.

The GTX 675MX also holds a slight edge in FP32 performance, at 1,255.7 GFLOPS versus the Iris Pro P580's 1,152.0 GFLOPS. This is an 8.9% difference in theoretical compute throughput. The GTX 675MX's pixel rate of 13.08 GPixel/s is 45% higher than the Iris Pro P580's 9.000 GPixel/s.

However, the Iris Pro P580 wins in texture rate. Its 72.00 GTexel/s is 37.6% higher than the GTX 675MX's 52.32 GTexel/s. This is notable given the Iris Pro P580's lower shading unit count (576 versus 960), suggesting its higher boost clock of 1000 MHz compensates effectively for texture throughput.

The Iris Pro P580 also leads in API feature support. DirectX 12 (12_1) versus DirectX 12 (11_0) means the Intel part supports a higher feature level. Vulkan 1.3 versus Vulkan 1.2.175 indicates newer API capabilities. These differences could matter in modern games or applications that leverage these features.

In the nearest rival comparisons, the GTX 675MX's average score of 8427 is nearly identical to the AMD Radeon 880M's 8436 (-0.1%) and the NVIDIA GeForce MX330's 8458 (-0.4%). The Iris Pro P580's average score of 7170 is essentially tied with the NVIDIA GeForce GTX 560 SE's 7171 (0%) and slightly below the AMD Radeon Vega 8 Mobile's 7203 (-0.5%).

The Verdict

The GTX 675MX is the stronger performer in the recorded benchmark. Its 18.1% lead in Geekbench OpenCL, combined with higher FP32 performance and pixel rate, makes it the choice for compute-heavy tasks and applications that benefit from dedicated memory bandwidth. Its 115.2 GB/s memory bandwidth versus the Iris Pro P580's System Dependent bandwidth is a decisive advantage in memory-intensive workloads.

The Iris Pro P580 is the better choice for power-constrained or integrated systems. Its 15 W TDP is a fraction of the GTX 675MX's 100 W, making it suitable for laptops or compact desktops where the MXM Module form factor of the GTX 675MX is not an option. The Iris Pro P580 also offers superior texture rate and newer API support, including DirectX 12 (12_1) and Vulkan 1.3.

Users who prioritize raw compute and have the power budget should select the GTX 675MX. Its average benchmark score of 8427 places it in the 43rd percentile of all GPUs, outperforming the Iris Pro P580's 7170 and 39th percentile. The GTX 675MX's nearest rivals, such as the AMD Radeon 880M and NVIDIA GeForce MX330, are all within 0.4% of its score, confirming its standing in its performance class.

Users who need an integrated solution with low power draw and modern API support should select the Iris Pro P580. Its 72.00 GTexel/s texture rate exceeds the GTX 675MX's 52.32 GTexel/s, and its Vulkan 1.3 support is more recent. The Iris Pro P580's nearest rival, the NVIDIA GeForce GTX 560 SE, is essentially tied with it at 0% delta, while the GTX 750 is 0.7% ahead.

The data shows two different philosophies. The GTX 675MX is a discrete, high-power part with dedicated memory and higher compute throughput. The Iris Pro P580 is an efficient integrated part with higher texture throughput and newer API features. The choice depends on whether the user prioritizes raw OpenCL performance or power efficiency and API modernity.