AMD Radeon HD 6970M Mac Edition

The AMD Radeon HD 6970M Mac Edition is an end-of-life mobile GPU built around the Blackcomb chip on TeraScale 2 architecture. It was released on August 24, 2011 as part of the Vancouver (HD 6900M) generation, produced on TSMC's 40 nm process with 1,700 million transistors on a 212 mm² die. It uses an MXM Module form factor with an MXM-B (3.0) bus interface, and its display outputs are Portable Device Dependent.

Who Should Consider It

This is not a desktop card. The data lists no auxiliary power connectors, a 75 W TDP, and a slot width of MXM Module, so the only practical audience is someone servicing or upgrading a compatible Mac portable that uses an MXM-B (3.0) module. The card has 960 shading units, 48 texture mapping units, and 32 ROPs, which makes it a capable discrete GPU for its mobile socket class, but the lack of benchmark scores in the record means recommendations have to be built from the listed specification ceilings rather than measured performance.

For resolution and settings planning, the relevant limits are the memory buffer, the fill rates, and the compute throughput. The frame buffer is 2 GB of GDDR5, so workloads that require more than 2 GB of local assets will not fit without spilling or streaming. The pixel rate is 21.76 GPixel/s, and the texture rate is 32.64 GTexel/s. Those two figures are the hardware's hard throughput caps for rasterization and texturing. A user with a high-resolution built-in display needs to check the 21.76 GPixel/s ROP throughput first, because every additional displayed pixel consumes that fill rate. On the shader side, the FP32 compute ceiling is 1,305.6 GFLOPS, which gives a rough indication of how much general shading work the 960 shaders can perform.

Because the production status is end-of-life, this is not a forward-looking purchase. The practical use case is a replacement or repair for a Mac portable whose original GPU has failed or whose owner wants a higher-end HD 6900M-generation part. The module draws no additional power connectors, so the host system must already be designed to deliver the card's 75 W envelope through the MXM socket.

Ray Tracing and Feature Set

There are no RT cores and no tensor cores listed in the data. That means hardware-accelerated ray tracing and tensor-based acceleration are absent. This is consistent with the TeraScale 2 architecture, which predates dedicated ray tracing hardware. The API table lists DirectX 11.2 with an 11_0 feature level and OpenGL 4.4. There is no Vulkan version listed, so Vulkan compatibility cannot be assumed.

The absence of Vulkan is a meaningful compatibility barrier for modern software that expects a Vulkan driver. The DirectX 11.2 (11_0) entry and OpenGL 4.4 entry are the only graphics API paths available. For legacy DirectX 11-oriented workloads, the feature set is appropriate. For anything relying on Vulkan or on hardware ray tracing, this card is not a match. The feature set is firmly rooted in the Raster-era TeraScale 2 design, with no placeholder for ray tracing or tensor hardware.

Benchmark Performance

The record contains no loaded benchmark scores for this GPU. The average benchmark score field is 0, and the nearestRivals array is empty, so there are no rival scores or deltaPct values to interpret. The only global placement figure is the 50th percentile against all GPUs in the database. Because that percentile is not accompanied by a nonzero benchmark average, it should be treated as a positional marker rather than a tested performance result.

What the record does provide are specification-level throughput limits. The FP32 figure is 1,305.6 GFLOPS, the texture rate is 32.64 GTexel/s, and the pixel rate is 21.76 GPixel/s. These three numbers are the quantitative anchors for traditional raster work. The 960 shading units drive the FP32 ceiling, the 48 TMUs drive the texture rate, and the 32 ROPs drive the pixel rate. In the absence of actual benchmark deltas, these are the only hard performance statements that can be made.

The memory clock is 900 MHz with an effective data rate of 3.6 Gbps. On a 256-bit bus, that produces 115.2 GB/s of bandwidth. That bandwidth has to feed both the texture rate and the pixel rate. For a GPU with 1,305.6 GFLOPS of compute, the 115.2 GB/s interface is the connection between the 2 GB GDDR5 pool and the shader array. The 40 nm process and 1,700 million transistor count explain why the chip is compact enough to fit in a 75 W MXM module: the die is 212 mm², with a transistor density of 8.0M / mm².

Since no rival benchmarks are present, statements like "ahead of X by Y percent" cannot be made from this data. The 50th percentile placement is the only comparative data point, and it is best read as a middle-of-the-pack position in the database's all-GPU distribution.

FAQ

Q: Does the Radeon HD 6970M Mac Edition support hardware ray tracing?

A: No. The card has no RT cores, and its API list includes DirectX 11.2 (11_0) and OpenGL 4.4, with no Vulkan version. Hardware ray tracing is not part of the feature set.

Q: What type of memory does it use?

A: It uses 2 GB of GDDR5 on a 256-bit bus, with 115.2 GB/s of bandwidth and a memory clock of 900 MHz, or 3.6 Gbps effective.

Q: What kind of slot does this card use?

A: The card is an MXM Module with an MXM-B (3.0) bus interface. It has no auxiliary power connectors, and its TDP is 75 W.

Q: What are the display outputs?

A: The display outputs are listed as Portable Device Dependent, meaning the physical video connectors are determined by the host Mac portable rather than by the card itself.

Q: Is the card still in production?

A: No, its production status is end-of-life. It was released on August 24, 2011.

Q: Does the card support Vulkan?

A: The data does not list a Vulkan version. The supported APIs are DirectX 11.2 (11_0) and OpenGL 4.4.

How It Compares

The nearestRivals array in the data is empty, so there are no rival names, scores, or deltaPct values to compare against. The only comparative signal is the 50th percentile placement against all GPUs, combined with an average benchmark score of 0. That means the card's relative position is unverified by actual workload scores in this database.

Within the product line, the predecessor is listed as Manhattan and the successor as London. Neither has specification data in this record, so they cannot be compared on core counts, clocks, or bandwidth. The Radeon HD 6970M Mac Edition sits between those two parts chronologically, but any performance relationship between them is not present in the fact pack. Without nearest rival entries, no head-to-head paragraph can be written. The only honest conclusion is that this GPU is positioned in the middle of the all-GPU percentile list and at the end of its own production life.

Memory Subsystem

The memory subsystem is clearly specified: 2 GB of GDDR5, a 256-bit bus, and 115.2 GB/s of bandwidth. The memory clock is 900 MHz, with an effective data rate of 3.6 Gbps. These figures describe both capacity and throughput. For high-resolution workloads, the 2 GB capacity is the hard ceiling for local frame buffer and texture storage. Once the active working set exceeds 2 GB, the GPU cannot keep all of it in local memory, and the 115.2 GB/s bandwidth is the speed at which data must be streamed across the interface.

The 256-bit bus width is important because it determines how much data can be moved per memory clock. Combined with the 3.6 Gbps effective GDDR5 rate, it yields the 115.2 GB/s figure. That bandwidth has to feed a GPU with a texture rate of 32.64 GTexel/s and a pixel rate of 21.76 GPixel/s. In practical terms, the memory system is capable enough for a mobile card of this compute class, but the 2 GB buffer is the limiting factor at high resolutions and with large texture sets. The 32 ROPs and 2 GB frame buffer work together to define the card's high-resolution envelope: enough ROP throughput for 21.76 GPixel/s, and enough memory capacity for a 2011-era mobile workstation or high-end laptop workload.