GeForce 6800 Ultra vs Radeon HD 7990
Aggregate performance score
We've compared Radeon HD 7990 and GeForce 6800 Ultra, covering specs and all relevant benchmarks.
HD 7990 outperforms 6800 Ultra by a whopping 3948% based on our aggregate benchmark results.
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 423 | 1385 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.35 | no data |
| Power efficiency | 2.76 | 0.32 |
| Architecture | GCN 1.0 (2012−2020) | Curie (2003−2013) |
| GPU code name | Malta | NV45 |
| Market segment | Desktop | Desktop |
| Release date | 24 April 2013 (13 years ago) | 26 July 2004 (22 years ago) |
| Launch price (MSRP) | $999 | $499 |
Cost-effectiveness evaluation
The higher the ratio, the better. We use the manufacturer's recommended prices.
HD 7990 and 6800 Ultra have a nearly equal value for money.
Performance to price scatter graph
Currently popular graphics cards are shown 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. Real power consumption of some graphics cards can well exceed their nominal TDP, especially if overclocked.
| Pipelines / CUDA cores | 2048 ×2 | no data |
| Core clock speed | 950 MHz | 425 MHz |
| Boost clock speed | 1000 MHz | no data |
| Number of transistors | 4,313 million | 222 million |
| Manufacturing process technology | 28 nm | 130 nm |
| Power consumption (TDP) | 375 Watt | 81 Watt |
| Texture fill rate | 128.0 ×2 | 6.800 |
| Floating-point processing power | 4.096 TFLOPS ×2 | no data |
| ROPs | 32 ×2 | 16 |
| TMUs | 128 ×2 | 16 |
| L1 Cache | 512 KB | no data |
| L2 Cache | 768 KB | no data |
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 1.0 x16 |
| Length | 307 mm | 197 mm |
| Width | 2-slot | 2-slot |
| Supplementary power connectors | 2x 8-pin | 1x 6-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 | GDDR3 |
| Maximum RAM amount | 3 GB ×2 | 256 MB |
| Memory bus width | 384 Bit ×2 | 256 Bit |
| Memory clock speed | 1500 MHz | 550 MHz |
| Memory bandwidth | 288.0 GB/s ×2 | 35.2 GB/s |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | 1x DVI, 4x mini-DisplayPort | 2x DVI, 1x S-Video |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_1) | 9.0c (9_3) |
| Shader Model | 5.1 | 3.0 |
| OpenGL | 4.6 | 2.1 |
| OpenCL | 1.2 | N/A |
| Vulkan | 1.2.131 | N/A |
Synthetic benchmarks
Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark score.
Passmark
This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Pros & cons summary
| Performance score | 13.36 | 0.33 |
| Recency | 24 April 2013 | 26 July 2004 |
| Maximum RAM amount | 3 GB | 256 MB |
| Chip lithography | 28 nm | 130 nm |
| Power consumption (TDP) | 375 Watt | 81 Watt |
HD 7990 has a 3948% higher aggregate performance score, an age advantage of 8 years, a 1100% higher maximum VRAM amount, and a 364% more advanced lithography process.
6800 Ultra, on the other hand, has 363% lower power consumption.
The Radeon HD 7990 is our recommended choice as it beats the GeForce 6800 Ultra in performance tests.
Other comparisons
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
