AMD Radeon HD 6990
About GPU
The AMD Radeon HD 6990 is a powerful GPU designed for desktop gaming and professional graphics work. With a memory size of 2GB and GDDR5 memory type, this GPU delivers fast and efficient performance for handling high-resolution textures and complex visual effects. The memory clock speed of 1250MHz ensures smooth and responsive gameplay, while the 1536 shading units provide ample processing power for rendering realistic lighting and shadows.
One impressive feature of the Radeon HD 6990 is its 2.55 TFLOPS theoretical performance, which makes it well-suited for demanding gaming and content creation tasks. Additionally, the 512KB L2 cache helps to reduce latency and improve overall system responsiveness.
In terms of power consumption, the Radeon HD 6990 has a TDP of 375W, which is higher than some other GPUs on the market. However, this extra power consumption is justified by the exceptional performance and capabilities of this graphics card.
Overall, the AMD Radeon HD 6990 is a solid choice for anyone in need of a high-performance GPU for desktop applications. Its combination of fast memory, ample shading units, and impressive theoretical performance make it well-suited for gaming, video editing, 3D modeling, and other graphic-intensive tasks. While it may consume more power than some other options, the Radeon HD 6990's performance capabilities make it a compelling choice for those who demand top-tier graphics performance.
Basic
Label Name
AMD
Platform
Desktop
Launch Date
March 2011
Model Name
Radeon HD 6990
Generation
Northern Islands
Bus Interface
PCIe 2.0 x16
Transistors
2,640 million
Compute Units
24
TMUs
?
Texture Mapping Units (TMUs) serve as components of the GPU, which are capable of rotating, scaling, and distorting binary images, and then placing them as textures onto any plane of a given 3D model. This process is called texture mapping.
96
Foundry
TSMC
Process Size
40 nm
Architecture
TeraScale 3
Memory Specifications
Memory Size
2GB
Memory Type
GDDR5
Memory Bus
?
The memory bus width refers to the number of bits of data that the video memory can transfer within a single clock cycle. The larger the bus width, the greater the amount of data that can be transmitted instantaneously, making it one of the crucial parameters of video memory. The memory bandwidth is calculated as: Memory Bandwidth = Memory Frequency x Memory Bus Width / 8. Therefore, when the memory frequencies are similar, the memory bus width will determine the size of the memory bandwidth.
256bit
Memory Clock
1250MHz
Bandwidth
?
Memory bandwidth refers to the data transfer rate between the graphics chip and the video memory. It is measured in bytes per second, and the formula to calculate it is: memory bandwidth = working frequency × memory bus width / 8 bits.
160.0 GB/s
Theoretical Performance
Pixel Rate
?
Pixel fill rate refers to the number of pixels a graphics processing unit (GPU) can render per second, measured in MPixels/s (million pixels per second) or GPixels/s (billion pixels per second). It is the most commonly used metric to evaluate the pixel processing performance of a graphics card.
26.56 GPixel/s
Texture Rate
?
Texture fill rate refers to the number of texture map elements (texels) that a GPU can map to pixels in a single second.
79.68 GTexel/s
FP64 (double)
?
An important metric for measuring GPU performance is floating-point computing capability. Double-precision floating-point numbers (64-bit) are required for scientific computing that demands a wide numeric range and high accuracy, while single-precision floating-point numbers (32-bit) are used for common multimedia and graphics processing tasks. Half-precision floating-point numbers (16-bit) are used for applications like machine learning, where lower precision is acceptable.
637.4 GFLOPS
FP32 (float)
?
An important metric for measuring GPU performance is floating-point computing capability. Single-precision floating-point numbers (32-bit) are used for common multimedia and graphics processing tasks, while double-precision floating-point numbers (64-bit) are required for scientific computing that demands a wide numeric range and high accuracy. Half-precision floating-point numbers (16-bit) are used for applications like machine learning, where lower precision is acceptable.
2.601
TFLOPS
Miscellaneous
Shading Units
?
The most fundamental processing unit is the Streaming Processor (SP), where specific instructions and tasks are executed. GPUs perform parallel computing, which means multiple SPs work simultaneously to process tasks.
1536
L1 Cache
8 KB (per CU)
L2 Cache
512KB
TDP
375W
Vulkan Version
?
Vulkan is a cross-platform graphics and compute API by Khronos Group, offering high performance and low CPU overhead. It lets developers control the GPU directly, reduces rendering overhead, and supports multi-threading and multi-core processors.
N/A
OpenCL Version
1.2
OpenGL
4.4
DirectX
11.2 (11_0)
Power Connectors
2x 8-pin
Shader Model
5.0
ROPs
?
The Raster Operations Pipeline (ROPs) is primarily responsible for handling lighting and reflection calculations in games, as well as managing effects like anti-aliasing (AA), high resolution, smoke, and fire. The more demanding the anti-aliasing and lighting effects in a game, the higher the performance requirements for the ROPs; otherwise, it may result in a sharp drop in frame rate.
32
Suggested PSU
750W
Benchmarks
FP32 (float)
Score
2.601
TFLOPS
Compared to Other GPU
FP32 (float)
/ TFLOPS