GPU Comparison

The data shows a split decision. The NVIDIA Quadro P400 and Intel HD Graphics P530 trade benchmark victories, with the Intel part winning OpenCL and the NVIDIA part winning Vulkan. However, the margins tell the real story: Intel's OpenCL win is a narrow 6.6% edge, while NVIDIA's Vulkan victory is a decisive 12% lead. For users prioritizing compute workloads in OpenCL, the integrated Intel solution holds a slight advantage; for Vulkan-based applications or gaming, the discrete Quadro P400 is the stronger choice. The overall average benchmark scores are close, 4684 for the Quadro versus 4560 for the HD Graphics P530, placing both in the bottom third of all GPUs, at the 27th and 26th percentiles respectively. Neither part is a performance powerhouse, but the Quadro P400 offers a more balanced feature set with dedicated memory and higher raw throughput, making it the safer pick for professional tasks where driver stability and consistent output matter.

The Verdict

Choose the NVIDIA Quadro P400 if your workload leans on Vulkan APIs, requires dedicated video memory, or needs a discrete, single-slot card with its own power delivery. Its Vulkan score of 5119 is 12% higher than the Intel HD Graphics P530's 4571, and its 2 GB of GDDR5 memory with 32.06 GB/s bandwidth is a concrete advantage over the Intel part's system-shared memory. The Quadro also delivers 641.0 GFLOPS of FP32 performance, which is 67% higher than the Intel's 384.0 GFLOPS, suggesting better raw compute in non-OpenCL paths.

Choose the Intel HD Graphics P530 if you are confined to a low-power, integrated solution where the 15 W TDP and motherboard-dependent outputs are acceptable. Its OpenCL score of 4549 beats the Quadro's 4249 by 6.6%, and it offers a higher FP16 rate of 768.0 GFLOPS (2:1 ratio) versus the Quadro's 10.02 GFLOPS (1:64), indicating superior half-precision compute. This makes it a reasonable choice for specific compute tasks that favor OpenCL and half-precision math, though its 3 ROPS and 3.000 GPixel/s pixel rate are severely limiting for graphics output.

The verdict is clear: the Quadro P400 wins on versatility and peak performance, while the HD Graphics P530 wins on efficiency and one specific compute metric. Unless your application is exclusively OpenCL-bound, the Quadro P400 is the more capable hardware.

Architecture Differences

The two GPUs come from entirely different design philosophies. The NVIDIA Quadro P400 is built on the Pascal architecture using the GP107 chip, fabricated on a 14 nm process at Samsung. It packs 3,300 million transistors into a 132 mm² die, yielding a transistor density of 25.0M / mm². In contrast, the Intel HD Graphics P530 uses the Generation 9.0 architecture with the Skylake GT2 chip, produced on Intel's 14 nm+ process, with a die size of 123 mm² and no disclosed transistor count.

Core configurations differ substantially. The Quadro P400 features 256 shading units, 16 TMUs, and 16 ROPs, while the Intel part has 192 shading units, 16 TMUs, but only 3 ROPs. This ROP disparity explains the massive difference in pixel throughput: the Quadro achieves 20.03 GPixel/s versus the Intel's 3.000 GPixel/s. Texture rates are closer, with the Quadro at 20.03 GTexel/s and the Intel at 16.00 GTexel/s.

Memory architecture is fundamentally different. The Quadro P400 has 2 GB of GDDR5 on a 64-bit bus, delivering 32.06 GB/s of bandwidth. The Intel HD Graphics P530 uses System Shared memory with a System Shared bus and bandwidth that is System Dependent, meaning its performance scales with the host system's RAM speed. This gives the discrete card a predictable, dedicated memory pool, while the integrated solution competes with the CPU for bandwidth.

Clock speeds also favor NVIDIA. The Quadro runs at a 1228 MHz base and 1252 MHz boost, while the Intel part starts at 350 MHz and boosts to 1000 MHz. The Quadro's memory runs at 1002 MHz (4 Gbps effective). API support shows parity on DirectX (both 12 (12_1)) and OpenGL (both 4.6), but the Quadro supports Vulkan 1.4 versus Intel's 1.3, a subtle but relevant difference for modern applications.

Where Each One Wins

The NVIDIA Quadro P400 wins decisively in raw graphics throughput and Vulkan performance. Its 12% higher Vulkan score (5119 vs 4571) is the largest single benchmark margin in this comparison. The Quadro's 20.03 GPixel/s pixel rate is 6.7x higher than the Intel's 3.000 GPixel/s, making it the clear choice for any display-intensive or rasterization-heavy workload. Its dedicated 2 GB GDDR5 memory with 32.06 GB/s bandwidth eliminates the variable of system memory performance, providing consistent frame pacing and data access. The 641.0 GFLOPS FP32 throughput is also 67% higher, aiding general-purpose compute in CAD or scientific applications that use single-precision math.

The Intel HD Graphics P530 wins in OpenCL compute and power efficiency. Its OpenCL score of 4549 edges out the Quadro's 4249 by 6.6%, suggesting that the Intel architecture has an optimized path for this specific API. The FP16 performance is a standout: 768.0 GFLOPS at a 2:1 ratio versus the Quadro's paltry 10.02 GFLOPS at a 1:64 ratio. This makes the Intel part 76.6x faster in half-precision compute, which is significant for machine learning inference or image processing that leverages FP16. The 15 W TDP is exactly half of the Quadro's 30 W, making it the superior choice for battery-constrained systems or silent, fanless builds. The Ring Bus interface and IGP slot width also mean zero additional power connectors and no physical card to install.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA Quadro P400 has an average benchmark score of 4684, which is 2.7% higher than the Intel HD Graphics P530's 4560.

Q: How do the two compare in Vulkan performance?

A: The NVIDIA Quadro P400 scores 5119 in the geekbench_vulkan test, which is 12% higher than the Intel HD Graphics P530's 4571. This is the largest performance gap in the head-to-head comparison.

Q: What is the memory configuration difference?

A: The Quadro P400 uses 2 GB of dedicated GDDR5 memory on a 64-bit bus with 32.06 GB/s bandwidth. The Intel HD Graphics P530 uses System Shared memory with System Shared type and bus width, and its bandwidth is System Dependent on the host system.

Q: Which GPU supports newer Vulkan versions?

A: The NVIDIA Quadro P400 supports Vulkan 1.4, while the Intel HD Graphics P530 supports Vulkan 1.3. Both support DirectX 12 (12_1) and OpenGL 4.6.

Q: How do the pixel rates compare?

A: The NVIDIA Quadro P400 achieves a pixel rate of 20.03 GPixel/s, which is significantly higher than the Intel HD Graphics P530's 3.000 GPixel/s. This is due to the Quadro's 16 ROPs versus the Intel's 3 ROPs.

Q: What is the TDP difference?

A: The Intel HD Graphics P530 has a TDP of 15 W, which is half of the NVIDIA Quadro P400's 30 W. The Quadro also requires a suggested power supply of 200 W, while the Intel part has no such requirement as an IGP.

Head-to-Head Benchmarks

The two benchmark tests tell opposing stories. In the geekbench_opencl test, the Intel HD Graphics P530 wins with a score of 4549 against the Quadro P400's 4249, a delta of -6.6% from NVIDIA's perspective. This indicates that Intel's integrated solution has a more efficient OpenCL compute path, likely leveraging its higher FP16 throughput and system-shared memory access patterns. The margin is modest, however, and within the noise of typical workload variance.

The geekbench_vulkan test flips the script decisively. The NVIDIA Quadro P400 scores 5119 versus the Intel's 4571, a 12% advantage. This is a substantial gap that reflects the Quadro's superior pixel rate (20.03 GPixel/s vs 3.000 GPixel/s) and its dedicated GDDR5 memory, which reduces latency and increases bandwidth consistency for graphics-heavy Vulkan workloads. The 12% delta is exactly double the margin of Intel's OpenCL win, suggesting that NVIDIA's architecture has a stronger fundamental graphics pipeline, while Intel's win is more of a niche compute advantage.

Looking at the broader context, the Quadro P400's nearest rivals include the AMD Radeon RX 9060 XT 16 GB and AMD Radeon R5 M320, both with average scores of 4657 (a 0.6% delta), and the NVIDIA GeForce GTX 970M at 4628 (1.2%). The Intel HD Graphics P530's rivals include the AMD Radeon RX 560 at 4569 (-0.2%), the AMD Radeon R5 M230 at 4577 (-0.4%), and the NVIDIA Quadro M3000M at 4621 (-1.3%). These placements show both cards sitting in a crowded mid-low tier, where the Quadro edges out its peers slightly and the Intel part trades blows with entry-level discrete GPUs.

Specification Differences

The two cards diverge on nearly every hardware specification. The process node differs: the Quadro P400 uses 14 nm from Samsung, while the Intel HD Graphics P530 uses 14 nm+ from Intel. The Quadro has 3,300 million transistors on a 132 mm² die, whereas the Intel part has no disclosed transistor count on a 123 mm² die.

Memory is the most significant differentiator. The Quadro P400 has 2 GB GDDR5 with a 64-bit bus and 32.06 GB/s bandwidth. The Intel HD Graphics P530 uses System Shared memory, type, and bus width, with bandwidth listed as System Dependent. Clock speeds also differ: the Quadro runs at 1228 MHz base and 1252 MHz boost, while the Intel part is at 350 MHz base and 1000 MHz boost. The Quadro's memory clock is 1002 MHz (4 Gbps effective).

Shader resources favor NVIDIA: 256 shading units, 16 TMUs, and 16 ROPs versus Intel's 192 shading units, 16 TMUs, and 3 ROPs. This leads to a pixel rate of 20.03 GPixel/s for the Quadro versus 3.000 GPixel/s for the Intel, and a texture rate of 20.03 GTexel/s versus 16.00 GTexel/s. FP32 performance is 641.0 GFLOPS for NVIDIA and 384.0 GFLOPS for Intel; FP16 is 10.02 GFLOPS (1:64) for NVIDIA and 768.0 GFLOPS (2:1) for Intel.

Power and physical specs also vary. The Quadro P400 is a 30 W, Single-slot card with None power connectors, requiring a 200 W suggested PSU, and measures 150 mm in length and 69 mm in height. The Intel HD Graphics P530 is a 15 W IGP with no power connectors, no suggested PSU, and no physical dimensions, using a Ring Bus interface. The Quadro outputs 3x mini-DisplayPort 1.4a, while the Intel part's outputs are Motherboard Dependent. API support is identical for DirectX (12 (12_1)) and OpenGL (4.6), but Vulkan differs: 1.4 for NVIDIA and 1.3 for Intel.