Intel Iris Pro Graphics P6300 vs NVIDIA GeForce GTX 770M Comparison

The Verdict

The data is clear: the NVIDIA GeForce GTX 770M is the outright performance winner between these two, delivering roughly 50% more compute throughput in the one benchmark where both are measured. The 770M's average benchmark score of 6000 places it in the 35th percentile of all GPUs, while the Intel Iris Pro Graphics P6300 sits just behind at 5712 average, in the 33rd percentile. If you need raw graphics horsepower for gaming or GPU-accelerated workloads, the GTX 770M is the only rational pick from this dataset.

However, the Iris Pro P6300 has one massive advantage that the benchmark scores don't capture: power consumption. At 15W TDP versus 75W for the GTX 770M, the Intel part consumes one-fifth the power. This makes it the obvious choice for ultraportable laptops where battery life and thermals matter more than frame rates. The GTX 770M is a discrete MXM module that demands its own cooling and power delivery, while the Iris Pro is an integrated GPU riding the Ring Bus, sharing system memory.

For a builder targeting a thin-and-light system with light graphics duties, the Iris Pro's efficiency wins. For anyone needing actual 3D performance, the GTX 770M's 49.7% lead in OpenCL is decisive. There is no middle ground here — pick based on whether power or performance is your bottleneck.

Architecture Differences

The GTX 770M is built on NVIDIA's Kepler architecture using the GK106 chip, fabricated on a 28nm process at TSMC. It packs 2,540 million transistors into a 221 mm² die, yielding a transistor density of 11.5M per mm². The chip features 960 shading units, 80 texture mapping units, and 24 raster output units. This is a proper discrete GPU with dedicated GDDR5 memory — 3GB on a 192-bit bus delivering 96.19 GB/s of bandwidth.

The Iris Pro P6300 comes from Intel's Generation 8.0 architecture, built on the Broadwell GT3e chip. It uses a 14nm process at Intel's own fabs, which is a smaller node than TSMC's 28nm. The architecture is fundamentally different: it's an integrated graphics processor (IGP) with 384 shading units, 48 TMUs, and only 6 ROPs. Crucially, it has no dedicated video memory — it uses System Shared memory, with bandwidth described as "System Dependent." The base clock is 300 MHz with an 800 MHz boost, while the GTX 770M runs at 706 MHz base and 797 MHz boost.

The API support differs meaningfully. The GTX 770M supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175. The Iris Pro also lists DirectX 12 (11_1) but only OpenGL 4.4 and Vulkan 1.0. This means the NVIDIA part has more mature driver support for modern graphics APIs, which could affect compatibility with newer titles and compute workloads. The Intel part also lacks the dedicated Tensor and RT cores found in newer architectures — though neither GPU has them.

FAQ

Q: Which GPU is faster in benchmark tests?

A: The NVIDIA GeForce GTX 770M wins the only head-to-head benchmark available. In Geekbench OpenCL, it scores 8552 versus 5712 for the Intel Iris Pro P6300, a 49.7% advantage. The GTX 770M also has a higher average benchmark score of 6000 compared to 5712.

Q: How do they compare in terms of power consumption?

A: The Intel Iris Pro P6300 uses 15W TDP, while the NVIDIA GTX 770M consumes 75W. That's a five-fold difference in power draw, making the Intel part far more suitable for battery-powered devices.

Q: Can the Iris Pro P6300 use the same memory as the GTX 770M?

A: No. The GTX 770M has 3GB of dedicated GDDR5 memory on a 192-bit bus with 96.19 GB/s bandwidth. The Iris Pro uses System Shared memory, meaning it borrows from the system RAM, and its bandwidth is "System Dependent."

Q: What are the closest rivals for each GPU?

A: The GTX 770M's nearest rival is the AMD Radeon RX 6400 with an identical average score of 6001 (0% delta). The Iris Pro P6300's closest competitor is the NVIDIA GeForce GTX 670MX at 5721, which is 0.1% faster.

Q: Which GPU has better API support?

A: The GTX 770M supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175. The Iris Pro P6300 supports DirectX 12 (11_1), OpenGL 4.4, and Vulkan 1.0. The NVIDIA part has higher OpenGL and Vulkan versions.

Q: Are these GPUs still in production?

A: No. Both are listed as end-of-life products. The GTX 770M was released on 2013-05-29 and has a successor (GeForce 800M), while the Iris Pro P6300 was released on 2014-09-04 with no listed predecessor or successor.

Specification Differences

The two GPUs differ sharply across nearly every spec field. The GTX 770M uses a 28nm TSMC process with 2,540 million transistors on a 221 mm² die, while the Iris Pro uses Intel's 14nm node with no transistor or die size data provided. The NVIDIA chip has 960 shading units, 80 TMUs, and 24 ROPs; the Intel chip has 384 shading units, 48 TMUs, and just 6 ROPs. Pixel rate is 15.94 GPixel/s for NVIDIA versus 4.800 GPixel/s for Intel. Texture rate is 63.76 GTexel/s versus 38.40 GTexel/s. FP32 compute is 1.530 TFLOPS versus 614.4 GFLOPS.

Memory is another major differentiator: 3GB GDDR5 on a 192-bit bus with 96.19 GB/s bandwidth versus System Shared memory with System Dependent bandwidth. Clock speeds: 706/797 MHz base/boost for NVIDIA, 300/800 MHz for Intel. TDP: 75W versus 15W. Form factor: MXM Module versus IGP. Bus interface: MXM-B (3.0) versus Ring Bus. Display outputs: Portable Device Dependent versus Motherboard Dependent. Power connectors: None for NVIDIA, not specified for Intel.

Both support DirectX 12, but with different feature levels (11_0 vs 11_1). OpenGL support is 4.6 versus 4.4. Vulkan is 1.2.175 versus 1.0. The GTX 770M has a predecessor (GeForce 600M) and successor (GeForce 800M); the Iris Pro has neither listed.

Head-to-Head Benchmarks

The only direct comparison available is Geekbench OpenCL. The GTX 770M scores 8552, and the Iris Pro P6300 scores 5712. That's a 49.7% delta in favor of NVIDIA — a massive gap that confirms the discrete GPU's compute advantage. In practical terms, this means the GTX 770M can handle OpenCL workloads nearly 1.5 times faster than the Intel integrated part.

The GTX 770M also appears in the Geekbench Metal test with a score of 3448, though the Iris Pro has no Metal result to compare. The NVIDIA part's average benchmark score of 6000 is 288 points higher than the Intel's 5712, a 5% overall advantage. This average is pulled up by the strong OpenCL result, while the Intel part's single benchmark drags its average down.

Looking at nearest rivals provides context: the GTX 770M's 6000 average puts it within 0.1% of the NVIDIA RTX PRO 6000 Blackwell Server (5996) and 0.2% of the AMD FirePro W4100 (5987). The Iris Pro's 5712 average is 0.1% behind the GTX 670MX (5721) and 1.9% ahead of the Quadro M500M (5604). This shows the GTX 770M punches in a higher weight class overall.

Where Each One Wins

The GTX 770M wins every compute benchmark where both are measured, and by a wide margin. Its 49.7% OpenCL lead makes it the clear choice for GPU-accelerated applications like video encoding, rendering, or any OpenCL-based compute task. The 960 shading units and 80 TMUs provide substantial parallel throughput, and the dedicated 3GB GDDR5 with 96.19 GB/s bandwidth means it won't be bottlenecked by system memory contention. The 15.94 GPixel/s pixel rate and 63.76 GTexel/s texture rate are roughly 3.3x and 1.7x the Intel part's respective rates, giving it a decisive edge in rasterization-heavy workloads.

The Iris Pro P6300 wins the efficiency battle outright. At 15W TDP versus 75W, it uses 80% less power. This makes it ideal for thin-and-light laptops where the 75W MXM module of the GTX 770M would require substantial cooling and battery capacity. The Intel part's 14nm process is more modern than the 28nm node of the Kepler chip, which contributes to its efficiency. Its 800 MHz boost clock is actually higher than the GTX 770M's 797 MHz boost, showing that at similar clock speeds, the integrated design can hold its own in raw clock frequency — it just lacks the raw hardware resources.

For gaming, the GTX 770M is the only viable option from the data. The Iris Pro's 384 shading units and 6 ROPs will struggle with modern 3D titles, while the GTX 770M's 960 shading units and 24 ROPs provide the necessary pixel throughput. For basic desktop use, web browsing, and video playback, the Iris Pro's efficiency and integrated nature make it the sensible choice. The data shows no scenario where the Intel part wins on performance, but its power profile wins on mobility and battery life.