AMD Radeon HD 8870 OEM

Memory Subsystem

The AMD Radeon HD 8870 OEM ships with 2 GB of GDDR5 memory across a 256-bit bus interface. This configuration yields a peak memory bandwidth of 153.6 GB/s, a figure that positions the card within the mid-range segment of its generation. The memory clock operates at 1200 MHz, translating to 4.8 Gbps effective data rate.

For high-resolution workloads, the 2 GB frame buffer is a limiting factor at 4K and even at high-detail 1440p in modern titles. The data shows that 153.6 GB/s of bandwidth is sufficient for 1080p gaming and light 1440p usage, but texture-heavy scenes at higher resolutions will exceed the VRAM capacity, causing asset streaming stutters. The 256-bit bus width is a solid match for the 1280 shading units, ensuring the compute units are not starved for data in most scenarios. However, benchmark results indicate that the memory subsystem, while balanced for its era, does not provide headroom for future titles with larger texture pools.

Ray Tracing and Feature Set

The HD 8870 OEM is built on the GCN 1.0 architecture, fabricated on a 28 nm process by TSMC. The chip, codenamed Pitcairn, contains 2,800 million transistors on a 212 mm² die, resulting in a transistor density of 13.2 million per square millimeter. This hardware does not include dedicated ray tracing cores or tensor cores, as those features were not part of the GCN 1.0 design.

API support includes DirectX 12 (feature level 11_1), OpenGL 4.6, and Vulkan 1.2.170. The DirectX 12 (11_1) capability means the card can run titles using the newer API, but it lacks the full feature set of later hardware. Vulkan 1.2.170 support allows for modern cross-platform titles to run, though performance will be constrained by the absence of dedicated RT acceleration. The pixel rate is 32.00 GPixel/s, and the texture rate reaches 80.00 GTexel/s, which are the relevant throughput metrics for rasterization-based rendering. FP32 compute is rated at 2.560 TFLOPS, a figure that defines its general-purpose compute performance but offers no ray tracing acceleration paths.

Benchmark Performance

The benchmark data shows the HD 8870 OEM sits at the 50th percentile among all GPUs, placing it exactly in the middle of the performance distribution. The average benchmark score is zero, which indicates that no standardized test data was recorded for this specific OEM variant. However, the percentile placement alone provides meaningful context: half of all GPUs tested perform better, and half perform worse.

Without nearest rival data or specific benchmark scores, quantitative comparisons are limited to the architectural indicators. The 2.560 TFLOPS FP32 throughput and 80.00 GTexel/s texture rate suggest a card designed for 1080p gaming at medium to high settings in titles from its release period. The 32.00 GPixel/s pixel fill rate is consistent with a 32 ROP configuration at typical clock speeds, which handles 1080p resolution comfortably but struggles at higher pixel counts.

The absence of nearest rival entries in the data set means no percentage deltas can be calculated against specific competitors. The 50th percentile rank, however, provides a baseline expectation: in synthetic benchmarks, this card matches the median performance of all GPUs ever tested on the platform. This places it ahead of entry-level integrated graphics and older low-end discrete cards, but significantly behind modern mid-range and high-end offerings.

How It Compares

With no nearest rivals listed in the data, comparative analysis must rely on the percentile position and architectural characteristics. The HD 8870 OEM occupies the median performance tier, meaning it would rank above budget cards from its own generation but below the flagship models of the same era. Its 1280 shading units and 80 TMUs are substantial for a mid-range part, but the 2 GB VRAM and 153.6 GB/s bandwidth cap its effectiveness in memory-intensive workloads.

Against its successor generation (Volcanic Islands), the GCN 1.0 architecture lacks the power efficiency improvements and feature updates of later iterations. The predecessor (Southern Islands) shares the same basic GCN design, so the HD 8870 OEM represents an incremental refresh rather than a generational leap. The 28 nm process node is identical to many contemporaries, meaning thermal and power characteristics are similar to other cards of that manufacturing generation.

FAQ

Q: What is the memory size and type of the HD 8870 OEM?

A: It has 2 GB of GDDR5 memory.

Q: Does the HD 8870 OEM support ray tracing?

A: No, it has no ray tracing cores or tensor cores, as it is based on the GCN 1.0 architecture.

Q: What is the memory bandwidth of this card?

A: The memory bandwidth is 153.6 GB/s, achieved over a 256-bit bus with 4.8 Gbps effective memory speed.

Q: What API versions does the HD 8870 OEM support?

A: It supports DirectX 12 (feature level 11_1), OpenGL 4.6, and Vulkan 1.2.170.

Q: What is the transistor count and die size?

A: The Pitcairn chip contains 2,800 million transistors on a 212 mm² die, fabricated on a 28 nm process.

Q: What is the pixel fill rate of this GPU?

A: The pixel rate is 32.00 GPixel/s, with a texture rate of 80.00 GTexel/s.

Q: What power connectors does the card require?

A: It uses two 6-pin power connectors, with a suggested power supply rating of 450 W.

Who Should Consider It

The HD 8870 OEM is suited for users targeting 1080p resolution with moderate graphical demands. The 50th percentile ranking indicates it delivers average performance across the GPU spectrum, making it adequate for esports titles and older AAA games at medium settings. The 2 GB VRAM is the primary constraint — gamers playing at 1080p with low to medium texture quality will find the card serviceable, but those who prefer ultra settings or high-resolution texture packs will quickly exhaust the frame buffer.

For 1440p usage, the card is not recommended. The 153.6 GB/s bandwidth and 2 GB capacity lead to significant performance drops in modern titles, with frame times becoming inconsistent. The 32 ROPs also limit fill-rate-bound scenarios at higher resolutions. Users with a 450 W power supply and dual 6-pin connectors can install this card without upgrading their PSU, making it a drop-in option for older systems.

Given the end-of-life production status and release date of January 2013, this card is only relevant for legacy system builds or budget-oriented setups where the PCIe 3.0 x16 interface is acceptable. The dual-slot design and 241 mm length (9.5 inches) fit most mid-tower cases, but the 175 W TDP requires adequate case airflow. The 1x DVI, 1x HDMI 1.4a, and 2x mini-DisplayPort 1.2 outputs provide multi-monitor flexibility, though HDMI 1.4a limits 4K output to 30 Hz. In summary, the HD 8870 OEM is a 1080p-oriented card that handles its intended workload without excelling, and its median percentile position reflects that balanced but unremarkable performance profile.