Radeon HD 6770 vs HD 6990
Aggregate performance score
We've compared Radeon HD 6990 and Radeon HD 6770, covering specs and all relevant benchmarks.
HD 6990 outperforms HD 6770 by a whopping 145% 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 | 582 | 812 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.60 | 0.54 |
| Power efficiency | 1.53 | 2.17 |
| Architecture | TeraScale 3 (2010−2013) | TeraScale 2 (2009−2015) |
| GPU code name | Antilles | Juniper |
| Market segment | Desktop | Desktop |
| Design | no data | reference |
| Release date | 8 March 2011 (15 years ago) | 21 January 2011 (15 years ago) |
| Launch price (MSRP) | $699 | $129 |
Cost-effectiveness evaluation
The higher the ratio, the better. We use the manufacturer's recommended prices.
HD 6990 has 11% better value for money than HD 6770.
Performance to price scatter graph
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 | 1536 ×2 | 800 |
| Core clock speed | 830 MHz | no data |
| Boost clock speed | no data | 900 MHz |
| Number of transistors | 2,640 million | 1,040 million |
| Manufacturing process technology | 40 nm | 40 nm |
| Power consumption (TDP) | 375 Watt | 108 Watt |
| Texture fill rate | 79.68 ×2 | 34.00 |
| Floating-point processing power | 2.55 TFLOPS ×2 | 1.36 TFLOPS |
| ROPs | 32 ×2 | 16 |
| TMUs | 96 ×2 | 40 |
| L1 Cache | 384 KB | 80 KB |
| L2 Cache | 512 KB | 256 KB |
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).
| Bus support | no data | PCIe 2.0 x16 |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Length | 295 mm | 198 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 | GDDR5 |
| Maximum RAM amount | 2 GB ×2 | 1 GB |
| Memory bus width | 256 Bit ×2 | 128 Bit |
| Memory clock speed | 1250 MHz | 1050 MHz |
| Memory bandwidth | 160.0 GB/s ×2 | 76.8 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 HDMI, 2x mini-DisplayPort |
| Eyefinity | - | + |
| HDMI | - | + |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| CrossFire | - | + |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 11.2 (11_0) | DirectX® 11 |
| Shader Model | 5.0 | 5.0 |
| OpenGL | 4.4 | 4.4 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 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.
3DMark Fire Strike Graphics
Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.
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 | 7.46 | 3.05 |
| Recency | 8 March 2011 | 21 January 2011 |
| Maximum RAM amount | 2 GB | 1 GB |
| Power consumption (TDP) | 375 Watt | 108 Watt |
HD 6990 has a 145% higher aggregate performance score, an age advantage of 1 month, and a 100% higher maximum VRAM amount.
HD 6770, on the other hand, has 247% lower power consumption.
The Radeon HD 6990 is our recommended choice as it beats the Radeon HD 6770 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.
