Intel Xeon Phi 7120X

How It Compares

The Intel Xeon Phi 7120X is an unusual entry in any GPU database, as it is a Knights Corner x100 coprocessor built for compute offload rather than rasterization. Its benchmark percentile of 50 places it exactly at the median of all tracked GPUs, which is remarkable given that it has zero fixed-function raster output units and no display outputs. The data shows a part that is neither a traditional gaming card nor a pure accelerator in the modern sense, but something in between.

There are no nearest rivals listed in the fact pack, which is telling. This absence reflects the Xeon Phi 7120X’s unique positioning as a many-core x86 coprocessor rather than a conventional GPU. It competes conceptually with early compute cards, but the database shows no direct performance counterpart. Benchmark results indicate that the 7120X’s 50th percentile standing means half of all tracked GPUs score higher and half score lower, but without specific rival scores, the comparison must focus on its internal specifications and what they imply.

The nearestRivals field is empty, so the analysis must rely on the chip’s own metrics. The 7120X delivers 2.602 TFLOPS of FP32 compute from 976 shading units at a base clock of 1238 MHz and a boost of 1333 MHz. That places it in a mid-range tier for its era, but the lack of raster output units and pixel rate of 0 MPixel/s means it cannot push frames like a traditional GPU. It is a compute-first device, and the data reflects that: texture rate of 42.66 GTexel/s is respectable, but the zero pixel rate is a hard ceiling for any graphics workload.

Ray Tracing and Feature Set

The fact pack lists no ray tracing cores and no tensor cores for the Intel Xeon Phi 7120X. This is consistent with its 2013 release date, predating dedicated RT hardware by several years. The architecture is Knights, based on the 22 nm process with 5,000 million transistors on a 720 mm² die, yielding a transistor density of 6.9 million per square millimeter. None of these figures suggest any hardware-accelerated ray tracing capability.

API support is equally sparse: DirectX, OpenGL, and Vulkan are all listed as null. The 7120X has no display outputs, which means it cannot drive a monitor, and its API nulls reinforce that this is not a graphics card in the conventional sense. The feature set is entirely compute-oriented, with the 976 shading units acting as general-purpose execution lanes for x86 workloads rather than pixel or vertex shaders. The 32 texture mapping units handle texture fetch operations, but with no ROPS, there is no framebuffer output path.

Tensor cores are absent, so any AI or deep learning acceleration would rely on the raw FP32 throughput of 2.602 TFLOPS. That is a modest figure by modern standards, but for 2013, it was a substantial compute resource. The PCIe 3.0 x16 bus interface is the only data path in and out of the card, and the dual-slot cooler suggests significant thermal management was needed. The lack of ray tracing and tensor hardware means the 7120X is unsuitable for any workload requiring those features; it is purely a scalar and vector compute engine.

Benchmark Performance

With no benchmark scores and no nearest rivals in the fact pack, the performance analysis must derive from the FP32 figure and the percentile rank. The 2.602 TFLOPS FP32 throughput is the headline number, and it directly determines the 50th percentile standing. This means the 7120X outperforms exactly half of all GPUs in the database, a surprisingly strong position for a device with no graphics output.

The texture rate of 42.66 GTexel/s is a secondary performance metric, and it indicates that the 32 TMUs are well-fed by the 1238 MHz base clock. The boost clock of 1333 MHz adds a modest 7.7% frequency headroom, which would translate to a proportional increase in compute throughput during sustained loads, though the fact pack does not specify how long boost can be maintained. The memory clock of 1375 MHz with 5.5 Gbps effective speed pairs with the 512-bit bus to deliver 352.0 GB/s of bandwidth, which is ample for the FP32 workload.

The benchmark results are absent, so there is no direct score to compare against rivals. However, the percentile data is the key interpretative tool: being at the 50th percentile means the 7120X is a median performer. In practice, that suggests it would fall behind any high-end card from its era in compute-heavy tasks, but it would beat entry-level parts. The lack of rasterization means gaming benchmarks would be meaningless, and the zero pixel rate confirms this card cannot generate a video signal.

Power and Cooling

The Intel Xeon Phi 7120X has a thermal design power of 300 W, which is a substantial draw for a 2013-era card. The suggested power supply is 700 W, providing a 400 W headroom over the TDP, which accounts for the rest of the system’s demands. The dual-slot cooler is necessary to dissipate that heat, and the card’s length of 248 mm or 9.8 inches means it requires a reasonably spacious chassis.

The fact pack does not list power connectors, so the exact plug configuration is unknown, but the 300 W TDP and 700 W PSU recommendation imply that at least one 8-pin and one 6-pin PCIe power connector would be typical. The slot width of dual-slot indicates that the cooler extends beyond the standard single-slot footprint, which is expected for a 300 W part. The production status is end-of-life, meaning the card is no longer manufactured, and power efficiency is not a strong point given the 22 nm process node.

The 5,000 million transistors on a 720 mm² die at 22 nm result in a power density that necessitates active cooling. The 6.9M transistors per square millimeter is a moderate density for that process, and the 300 W TDP is the direct consequence of running 976 shading units at 1238 MHz. The suggested 700 W PSU is a firm recommendation, and anyone pairing this card with a high-end CPU would need to exceed that figure to ensure stability.

FAQ

Q: Does the Intel Xeon Phi 7120X support ray tracing?

A: No. The fact pack lists no ray tracing cores, and the card has no display outputs, rendering it unsuitable for any ray-traced graphics workload.

Q: What is the FP32 compute performance of the 7120X?

A: The card delivers 2.602 TFLOPS of FP32 throughput, which places it at the 50th percentile of all tracked GPUs.

Q: Can this card output video to a monitor?

A: No. The fact pack lists display outputs as "No outputs" and the pixel rate as 0 MPixel/s, so it cannot generate a video signal.

Q: What power supply is recommended for this card?

A: The suggested PSU is 700 W, and the card itself has a TDP of 300 W.

Q: What is the memory configuration of the 7120X?

A: It has 16 GB of GDDR5 memory on a 512-bit bus, with a bandwidth of 352.0 GB/s and an effective memory speed of 5.5 Gbps.

Q: Is this card still in production?

A: No. The production status is end-of-life, with a release date of 2013-06-16.

Who Should Consider It

The Intel Xeon Phi 7120X is not for gamers, and the zero pixel rate makes that unambiguous. There are no resolution or settings recommendations possible for gaming because the card cannot render frames at any resolution. The 50th percentile standing and 2.602 TFLOPS FP32 throughput mean it is a compute-oriented device, suitable for scientific simulation, financial modeling, or any workload that can leverage x86 many-core processing.

At 1080p, the 7120X would be irrelevant for gaming, but for compute tasks, the 352.0 GB/s of memory bandwidth and 976 shading units provide a solid foundation for parallel workloads. The 16 GB GDDR5 frame buffer is not for textures but for working data sets, and the 512-bit bus ensures high-throughput data movement. The 42.66 GTexel/s texture rate is the only graphics-related metric, and it is meaningless without ROPS.

The card is best suited for users who need a coprocessor for highly parallel, floating-point-intensive tasks and who have a 700 W PSU already in place. The end-of-life status and lack of modern API support mean it is not a forward-looking purchase, but for legacy compute environments, the 7120X offers a unique x86-based acceleration path. Anyone requiring ray tracing, tensor acceleration, or any display output should look elsewhere, as the fact pack confirms none of those features exist here.

Memory Subsystem

The memory subsystem of the Intel Xeon Phi 7120X is one of its strongest features. It pairs 16 GB of GDDR5 memory with a 512-bit bus, delivering 352.0 GB/s of bandwidth. The effective memory speed is 5.5 Gbps, running at a base clock of 1375 MHz. This configuration is generous for 2013, and the 16 GB capacity is particularly notable for a compute card, as it allows large data sets to reside on the card without constant host transfers.

The 512-bit bus width is a key factor in achieving the 352.0 GB/s bandwidth figure. A narrower bus would require much higher clocks to match that throughput, and the 1375 MHz memory clock is moderate, meaning the bus width is doing the heavy lifting. For high-resolution compute workloads, such as large matrix operations or physics simulations, this bandwidth ensures that the 976 shading units are not starved for data.

The 16 GB capacity is the standout feature here. Many GPUs from 2013 had 2-4 GB, so the 7120X’s 16 GB provides a significant advantage for memory-bound tasks. The GDDR5 type is standard for the era, and the 5.5 Gbps effective speed is competitive. The fact pack does not list a memory clock boost, so the 1375 MHz figure is the sustained rate. For workloads that exceed 16 GB, the PCIe 3.0 x16 interface becomes the bottleneck, but for data that fits on the card, the 352.0 GB/s bandwidth is ample. This memory subsystem is the 7120X’s most compelling feature, and it directly supports the 50th percentile performance standing by enabling efficient data movement for the FP32 compute units.