AMD Radeon HD 7990
About GPU
The AMD Radeon HD 7990 is a powerful GPU designed for desktop gaming and high-performance computing. With a base clock speed of 950MHz and a boost clock speed of 1000MHz, this GPU offers impressive performance that can handle even the most demanding games and applications.
The 3GB of GDDR5 memory and a memory clock speed of 1500MHz provide ample memory bandwidth for smooth and lag-free gameplay. The 2048 shading units and 768KB of L2 cache ensure that complex graphics calculations can be handled efficiently, resulting in stunning visual effects and realistic imagery.
One of the standout features of the Radeon HD 7990 is its theoretical performance of 4.096 TFLOPS. This immense computational power makes it well-suited for not only gaming but also for tasks such as 3D rendering, video editing, and scientific simulations.
It's worth noting that the TDP of the Radeon HD 7990 is 375W, which means that it can consume a considerable amount of power under load. As a result, users should ensure that their power supply unit can accommodate the GPU's power requirements.
Overall, the AMD Radeon HD 7990 is a formidable GPU that delivers exceptional performance for gaming and professional applications. Its high clock speeds, generous memory capacity, and impressive computational power make it a strong contender for users seeking a high-end GPU for their desktop system.
Basic
Label Name
AMD
Platform
Desktop
Launch Date
April 2013
Model Name
Radeon HD 7990
Generation
Southern Islands
Base Clock
950MHz
Boost Clock
1000MHz
Bus Interface
PCIe 3.0 x16
Transistors
4,313 million
Compute Units
32
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.
128
Foundry
TSMC
Process Size
28 nm
Architecture
GCN 1.0
Memory Specifications
Memory Size
3GB
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.
384bit
Memory Clock
1500MHz
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.
288.0 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.
32.00 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.
128.0 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.
1024 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.
4.178
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.
2048
L1 Cache
16 KB (per CU)
L2 Cache
768KB
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.
1.2
OpenCL Version
1.2
OpenGL
4.6
DirectX
12 (11_1)
Power Connectors
2x 8-pin
Shader Model
5.1
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
4.178
TFLOPS
Compared to Other GPU
FP32 (float)
/ TFLOPS