Radeon RX 6600S vs HD 7990
Aggregate performance score
We've compared Radeon HD 7990 with Radeon RX 6600S, including specs and performance data.
6600S outperforms HD 7990 by a whopping 128% 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 | 407 | 209 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.26 | no data |
| Power efficiency | 2.70 | 28.85 |
| Architecture | GCN 1.0 (2012−2020) | RDNA 2.0 (2020−2025) |
| GPU code name | Malta | Navi 23 |
| Market segment | Desktop | Laptop |
| Release date | 24 April 2013 (12 years ago) | 4 January 2022 (3 years ago) |
| Launch price (MSRP) | $999 | no data |
Cost-effectiveness evaluation
The higher the ratio, the better. We use the manufacturer's recommended prices.
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 | 2048 ×2 | 1792 |
| Core clock speed | 950 MHz | 1700 MHz |
| Boost clock speed | 1000 MHz | 2000 MHz |
| Number of transistors | 4,313 million | 11,060 million |
| Manufacturing process technology | 28 nm | 7 nm |
| Power consumption (TDP) | 375 Watt | 80 Watt |
| Texture fill rate | 128.0 ×2 | 224.0 |
| Floating-point processing power | 4.096 TFLOPS ×2 | 7.168 TFLOPS |
| ROPs | 32 ×2 | 64 |
| TMUs | 128 ×2 | 112 |
| Ray Tracing Cores | no data | 28 |
| L0 Cache | no data | 448 KB |
| L1 Cache | 512 KB | 512 KB |
| L2 Cache | 768 KB | 2 MB |
| L3 Cache | no data | 32 MB |
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).
| Laptop size | no data | medium sized |
| Interface | PCIe 3.0 x16 | PCIe 4.0 x8 |
| Length | 307 mm | no data |
| Width | 2-slot | no data |
| Supplementary power connectors | 2x 8-pin | None |
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 | 4 GB |
| Memory bus width | 384 Bit ×2 | 128 Bit |
| Memory clock speed | 1500 MHz | 1750 MHz |
| Memory bandwidth | 288.0 GB/s ×2 | 224.0 GB/s |
| Shared memory | - | - |
| Resizable BAR | - | + |
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 | No outputs |
API and SDK support
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 | 6.5 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.1 |
| Vulkan | 1.2.131 | 1.3 |
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.
FPS performance in popular games
Full HD
Low
| Counter-Strike 2 | 170−180
+0%
|
170−180
+0%
|
| Cyberpunk 2077 | 65−70
+0%
|
65−70
+0%
|
| Hogwarts Legacy | 65−70
+0%
|
65−70
+0%
|
Full HD
Medium
| Battlefield 5 | 110−120
+0%
|
110−120
+0%
|
| Counter-Strike 2 | 170−180
+0%
|
170−180
+0%
|
| Cyberpunk 2077 | 65−70
+0%
|
65−70
+0%
|
| Far Cry 5 | 95−100
+0%
|
95−100
+0%
|
| Fortnite | 140−150
+0%
|
140−150
+0%
|
| Forza Horizon 4 | 120−130
+0%
|
120−130
+0%
|
| Forza Horizon 5 | 95−100
+0%
|
95−100
+0%
|
| Hogwarts Legacy | 65−70
+0%
|
65−70
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 120−130
+0%
|
120−130
+0%
|
| Valorant | 190−200
+0%
|
190−200
+0%
|
Full HD
High
| Battlefield 5 | 110−120
+0%
|
110−120
+0%
|
| Counter-Strike 2 | 170−180
+0%
|
170−180
+0%
|
| Counter-Strike: Global Offensive | 270−280
+0%
|
270−280
+0%
|
| Cyberpunk 2077 | 65−70
+0%
|
65−70
+0%
|
| Dota 2 | 130−140
+0%
|
130−140
+0%
|
| Far Cry 5 | 95−100
+0%
|
95−100
+0%
|
| Fortnite | 140−150
+0%
|
140−150
+0%
|
| Forza Horizon 4 | 120−130
+0%
|
120−130
+0%
|
| Forza Horizon 5 | 95−100
+0%
|
95−100
+0%
|
| Grand Theft Auto V | 100−110
+0%
|
100−110
+0%
|
| Hogwarts Legacy | 65−70
+0%
|
65−70
+0%
|
| Metro Exodus | 70−75
+0%
|
70−75
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 120−130
+0%
|
120−130
+0%
|
| The Witcher 3: Wild Hunt | 100−105
+0%
|
100−105
+0%
|
| Valorant | 190−200
+0%
|
190−200
+0%
|
Full HD
Ultra
| Battlefield 5 | 110−120
+0%
|
110−120
+0%
|
| Cyberpunk 2077 | 65−70
+0%
|
65−70
+0%
|
| Dota 2 | 130−140
+0%
|
130−140
+0%
|
| Far Cry 5 | 95−100
+0%
|
95−100
+0%
|
| Forza Horizon 4 | 120−130
+0%
|
120−130
+0%
|
| Hogwarts Legacy | 65−70
+0%
|
65−70
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 120−130
+0%
|
120−130
+0%
|
| The Witcher 3: Wild Hunt | 100−105
+0%
|
100−105
+0%
|
| Valorant | 190−200
+0%
|
190−200
+0%
|
Full HD
Epic
| Fortnite | 140−150
+0%
|
140−150
+0%
|
1440p
High
| Counter-Strike 2 | 70−75
+0%
|
70−75
+0%
|
| Counter-Strike: Global Offensive | 210−220
+0%
|
210−220
+0%
|
| Grand Theft Auto V | 60−65
+0%
|
60−65
+0%
|
| Metro Exodus | 40−45
+0%
|
40−45
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 170−180
+0%
|
170−180
+0%
|
| Valorant | 230−240
+0%
|
230−240
+0%
|
1440p
Ultra
| Battlefield 5 | 80−85
+0%
|
80−85
+0%
|
| Cyberpunk 2077 | 30−35
+0%
|
30−35
+0%
|
| Far Cry 5 | 70−75
+0%
|
70−75
+0%
|
| Forza Horizon 4 | 80−85
+0%
|
80−85
+0%
|
| Hogwarts Legacy | 35−40
+0%
|
35−40
+0%
|
| The Witcher 3: Wild Hunt | 50−55
+0%
|
50−55
+0%
|
1440p
Epic
| Fortnite | 75−80
+0%
|
75−80
+0%
|
4K
High
| Counter-Strike 2 | 30−35
+0%
|
30−35
+0%
|
| Grand Theft Auto V | 60−65
+0%
|
60−65
+0%
|
| Hogwarts Legacy | 20−22
+0%
|
20−22
+0%
|
| Metro Exodus | 27−30
+0%
|
27−30
+0%
|
| The Witcher 3: Wild Hunt | 45−50
+0%
|
45−50
+0%
|
| Valorant | 180−190
+0%
|
180−190
+0%
|
4K
Ultra
| Battlefield 5 | 45−50
+0%
|
45−50
+0%
|
| Counter-Strike 2 | 30−35
+0%
|
30−35
+0%
|
| Cyberpunk 2077 | 14−16
+0%
|
14−16
+0%
|
| Dota 2 | 95−100
+0%
|
95−100
+0%
|
| Far Cry 5 | 35−40
+0%
|
35−40
+0%
|
| Forza Horizon 4 | 55−60
+0%
|
55−60
+0%
|
| Hogwarts Legacy | 20−22
+0%
|
20−22
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 35−40
+0%
|
35−40
+0%
|
4K
Epic
| Fortnite | 35−40
+0%
|
35−40
+0%
|
All in all, in popular games:
- there's a draw in 66 tests (100%)
Pros & cons summary
| Performance score | 12.59 | 28.67 |
| Recency | 24 April 2013 | 4 January 2022 |
| Maximum RAM amount | 3 GB | 4 GB |
| Chip lithography | 28 nm | 7 nm |
| Power consumption (TDP) | 375 Watt | 80 Watt |
RX 6600S has a 127.7% higher aggregate performance score, an age advantage of 8 years, a 33.3% higher maximum VRAM amount, a 300% more advanced lithography process, and 368.8% lower power consumption.
The Radeon RX 6600S is our recommended choice as it beats the Radeon HD 7990 in performance tests.
Be aware that Radeon HD 7990 is a desktop graphics card while Radeon RX 6600S is a notebook one.
Other comparisons
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
