Radeon RX 8800 XT vs HD 7990
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 369 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.52 | no data |
| Power efficiency | 2.64 | no data |
| Architecture | GCN 1.0 (2011−2020) | RDNA 4.0 (2025) |
| GPU code name | Malta | Navi 48 |
| Market segment | Desktop | Desktop |
| Release date | 24 April 2013 (11 years ago) | no data |
| Launch price (MSRP) | $999 | no data |
Cost-effectiveness evaluation
The higher the performance-to-price ratio, the better. We use the manufacturer's recommended prices for comparison.
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 2048 ×2 | 4096 |
| Core clock speed | 950 MHz | 1295 MHz |
| Boost clock speed | 1000 MHz | 2430 MHz |
| Number of transistors | 4,313 million | no data |
| Manufacturing process technology | 28 nm | 4 nm |
| Power consumption (TDP) | 375 Watt | 220 Watt |
| Texture fill rate | 128.0 ×2 | 622.1 |
| Floating-point processing power | 4.096 TFLOPS ×2 | 19.91 TFLOPS |
| ROPs | 32 ×2 | 96 |
| TMUs | 128 ×2 | 256 |
| Ray Tracing Cores | no data | 64 |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | PCIe 3.0 x16 | PCIe 4.0 x16 |
| Length | 307 mm | 267 mm |
| Width | 2-slot | 2-slot |
| Supplementary power connectors | 2x 8-pin | 2x 8-pin |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR5 | GDDR6 |
| Maximum RAM amount | 3 GB ×2 | 16 GB |
| Memory bus width | 384 Bit ×2 | 256 Bit |
| Memory clock speed | 1500 MHz | 2438 MHz |
| Memory bandwidth | 288.0 GB/s ×2 | 624.1 GB/s |
Connectivity and outputs
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | 1x DVI, 4x mini-DisplayPort | 1x HDMI 2.1a, 3x DisplayPort 2.1 |
| HDMI | - | + |
API and SDK compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_1) | 12 Ultimate (12_2) |
| Shader Model | 5.1 | 6.8 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.2 |
| Vulkan | 1.2.131 | 1.3 |
Pros & cons summary
| Maximum RAM amount | 3 GB | 16 GB |
| Chip lithography | 28 nm | 4 nm |
| Power consumption (TDP) | 375 Watt | 220 Watt |
RX 8800 XT has a 433.3% higher maximum VRAM amount, a 600% more advanced lithography process, and 70.5% lower power consumption.
We couldn't decide between Radeon HD 7990 and Radeon RX 8800 XT. We've got no test results to judge.
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