Radeon RX 6600 vs HD 6990M
Aggregate performance score
We've compared Radeon HD 6990M with Radeon RX 6600, including specs and performance data.
RX 6600 outperforms HD 6990M by a whopping 649% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 611 | 110 |
| Place by popularity | not in top-100 | 14 |
| Cost-effectiveness evaluation | no data | 68.69 |
| Architecture | Terascale 2 (2009−2015) | Navi / RDNA2 (2020−2022) |
| GPU code name | Blackcomb XTX | Navi 23 |
| Market segment | Laptop | Desktop |
| Release date | 12 July 2011 (13 years ago) | 13 October 2021 (2 years ago) |
| Launch price (MSRP) | no data | $329 |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
Detailed specifications
General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 1120 | 1792 |
| Core clock speed | 715 MHz | 2044 MHz |
| Boost clock speed | no data | 2491 MHz |
| Number of transistors | 1,700 million | 11,060 million |
| Manufacturing process technology | 40 nm | 7 nm |
| Power consumption (TDP) | 100 Watt | 132 Watt |
| Texture fill rate | 40.04 | 279.0 |
| Floating-point performance | 1.602 gflops | 8.928 gflops |
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 | large | no data |
| Interface | MXM-B (3.0) | PCIe 4.0 x8 |
| Length | no data | 190 mm |
| Width | no data | 2-slot |
| Supplementary power connectors | None | 1x 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 | 2 GB | 8 GB |
| Memory bus width | 256 Bit | 128 Bit |
| Memory clock speed | 900 MHz | 14500 MHz |
| Memory bandwidth | 115.2 GB/s | 224.0 GB/s |
| Shared memory | - | - |
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 | No outputs | 1x HDMI, 3x DisplayPort |
| HDMI | - | + |
API compatibility
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 11.2 (11_0) | 12.0 Ultimate (12_2) |
| Shader Model | 5.0 | 6.5 |
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.1 |
| Vulkan | N/A | 1.2 |
Synthetic benchmark performance
Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
3DMark Vantage Performance
3DMark Vantage is an outdated DirectX 10 benchmark using 1280x1024 screen resolution. It taxes the graphics card with two scenes, one depicting a girl escaping some militarized base located within a sea cave, the other displaying a space fleet attack on a defenseless planet. It was discontinued in April 2017, and Time Spy benchmark is now recommended to be used instead.
3DMark 11 Performance GPU
3DMark 11 is an obsolete DirectX 11 benchmark by Futuremark. It used four tests based on two scenes, one being few submarines exploring the submerged wreck of a sunken ship, the other is an abandoned temple deep in the jungle. All the tests are heavy with volumetric lighting and tessellation, and despite being done in 1280x720 resolution, are relatively taxing. Discontinued in January 2020, 3DMark 11 is now superseded by Time Spy.
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Average FPS across all PC games
Here are the average frames per second in a large set of popular games across different resolutions:
| 900p | 54
−641%
| 400−450
+641%
|
| Full HD | 61
−88.5%
| 115
+88.5%
|
| 1440p | 7−8
−743%
| 59
+743%
|
| 4K | 4−5
−700%
| 32
+700%
|
FPS performance in popular games
Full HD
Low Preset
| Cyberpunk 2077 | 9−10
−1089%
|
107
+1089%
|
Full HD
Medium Preset
| Assassin's Creed Odyssey | 14−16
−493%
|
80−85
+493%
|
| Assassin's Creed Valhalla | 6−7
−1783%
|
113
+1783%
|
| Battlefield 5 | 14−16
−800%
|
120−130
+800%
|
| Call of Duty: Modern Warfare | 10−12
−618%
|
75−80
+618%
|
| Cyberpunk 2077 | 9−10
−911%
|
91
+911%
|
| Far Cry 5 | 10−12
−673%
|
85−90
+673%
|
| Far Cry New Dawn | 14−16
−547%
|
95−100
+547%
|
| Forza Horizon 4 | 30−35
−479%
|
190−200
+479%
|
| Hitman 3 | 10−12
−800%
|
99
+800%
|
| Horizon Zero Dawn | 30−35
−394%
|
160−170
+394%
|
| Metro Exodus | 12−14
−869%
|
120−130
+869%
|
| Red Dead Redemption 2 | 14−16
−557%
|
90−95
+557%
|
| Shadow of the Tomb Raider | 18−20
−653%
|
140−150
+653%
|
| Watch Dogs: Legion | 45−50
−174%
|
120−130
+174%
|
Full HD
High Preset
| Assassin's Creed Odyssey | 14−16
−493%
|
80−85
+493%
|
| Assassin's Creed Valhalla | 6−7
−1433%
|
92
+1433%
|
| Battlefield 5 | 14−16
−800%
|
120−130
+800%
|
| Call of Duty: Modern Warfare | 10−12
−618%
|
75−80
+618%
|
| Cyberpunk 2077 | 9−10
−711%
|
73
+711%
|
| Far Cry 5 | 10−12
−673%
|
85−90
+673%
|
| Far Cry New Dawn | 14−16
−547%
|
95−100
+547%
|
| Forza Horizon 4 | 30−35
−479%
|
190−200
+479%
|
| Hitman 3 | 10−12
−764%
|
95
+764%
|
| Horizon Zero Dawn | 30−35
−394%
|
160−170
+394%
|
| Metro Exodus | 12−14
−869%
|
120−130
+869%
|
| Red Dead Redemption 2 | 14−16
−557%
|
90−95
+557%
|
| Shadow of the Tomb Raider | 18−20
−858%
|
182
+858%
|
| The Witcher 3: Wild Hunt | 18−20
−350%
|
80−85
+350%
|
| Watch Dogs: Legion | 45−50
−174%
|
120−130
+174%
|
Full HD
Ultra Preset
| Assassin's Creed Odyssey | 14−16
−493%
|
80−85
+493%
|
| Assassin's Creed Valhalla | 6−7
−1200%
|
78
+1200%
|
| Call of Duty: Modern Warfare | 10−12
−618%
|
75−80
+618%
|
| Cyberpunk 2077 | 9−10
−556%
|
59
+556%
|
| Far Cry 5 | 10−12
−673%
|
85−90
+673%
|
| Forza Horizon 4 | 30−35
−479%
|
190−200
+479%
|
| Hitman 3 | 10−12
−682%
|
86
+682%
|
| Horizon Zero Dawn | 30−35
−330%
|
142
+330%
|
| Shadow of the Tomb Raider | 18−20
−726%
|
157
+726%
|
| The Witcher 3: Wild Hunt | 18−20
−400%
|
90
+400%
|
| Watch Dogs: Legion | 45−50
−23.4%
|
58
+23.4%
|
Full HD
Epic Preset
| Red Dead Redemption 2 | 14−16
−557%
|
90−95
+557%
|
1440p
High Preset
| Battlefield 5 | 10−11
−650%
|
75−80
+650%
|
| Far Cry New Dawn | 8−9
−650%
|
60−65
+650%
|
1440p
Ultra Preset
| Assassin's Creed Odyssey | 5−6
−740%
|
40−45
+740%
|
| Assassin's Creed Valhalla | 0−1 | 52 |
| Call of Duty: Modern Warfare | 5−6
−820%
|
45−50
+820%
|
| Cyberpunk 2077 | 2−3
−1600%
|
34
+1600%
|
| Far Cry 5 | 6−7
−650%
|
45−50
+650%
|
| Forza Horizon 4 | 12−14
−1592%
|
220−230
+1592%
|
| Hitman 3 | 9−10
−500%
|
54
+500%
|
| Horizon Zero Dawn | 12−14
−750%
|
102
+750%
|
| Metro Exodus | 3−4
−3133%
|
97
+3133%
|
| The Witcher 3: Wild Hunt | 4−5
−1325%
|
55−60
+1325%
|
| Watch Dogs: Legion | 30−35
−482%
|
190−200
+482%
|
1440p
Epic Preset
| Red Dead Redemption 2 | 9−10
−644%
|
65−70
+644%
|
4K
High Preset
| Battlefield 5 | 4−5
−875%
|
35−40
+875%
|
| Far Cry New Dawn | 3−4
−1000%
|
30−35
+1000%
|
| Hitman 3 | 1−2
−3500%
|
36
+3500%
|
| Horizon Zero Dawn | 9−10
−1922%
|
180−190
+1922%
|
| Metro Exodus | 2−3
−2400%
|
50−55
+2400%
|
| The Witcher 3: Wild Hunt | 1−2
−4300%
|
44
+4300%
|
4K
Ultra Preset
| Assassin's Creed Odyssey | 3−4
−800%
|
27−30
+800%
|
| Assassin's Creed Valhalla | 2−3
−1100%
|
24
+1100%
|
| Call of Duty: Modern Warfare | 2−3
−1150%
|
24−27
+1150%
|
| Cyberpunk 2077 | 0−1 | 14 |
| Far Cry 5 | 3−4
−667%
|
21−24
+667%
|
| Forza Horizon 4 | 4−5
−1250%
|
50−55
+1250%
|
| Watch Dogs: Legion | 2−3
−950%
|
21
+950%
|
4K
Epic Preset
| Red Dead Redemption 2 | 6−7
−483%
|
35−40
+483%
|
1440p
Ultra Preset
| Shadow of the Tomb Raider | 101
+0%
|
101
+0%
|
4K
Ultra Preset
| Shadow of the Tomb Raider | 53
+0%
|
53
+0%
|
This is how HD 6990M and RX 6600 compete in popular games:
- RX 6600 is 641% faster in 900p
- RX 6600 is 89% faster in 1080p
- RX 6600 is 743% faster in 1440p
- RX 6600 is 700% faster in 4K
Here's the range of performance differences observed across popular games:
- in The Witcher 3: Wild Hunt, with 4K resolution and the High Preset, the RX 6600 is 4300% faster.
All in all, in popular games:
- RX 6600 is ahead in 68 tests (97%)
- there's a draw in 2 tests (3%)
Pros & cons summary
| Performance score | 5.24 | 39.24 |
| Recency | 12 July 2011 | 13 October 2021 |
| Maximum RAM amount | 2 GB | 8 GB |
| Chip lithography | 40 nm | 7 nm |
| Power consumption (TDP) | 100 Watt | 132 Watt |
HD 6990M has 32% lower power consumption.
RX 6600, on the other hand, has a 648.9% higher aggregate performance score, an age advantage of 10 years, a 300% higher maximum VRAM amount, and a 471.4% more advanced lithography process.
The Radeon RX 6600 is our recommended choice as it beats the Radeon HD 6990M in performance tests.
Be aware that Radeon HD 6990M is a notebook card while Radeon RX 6600 is a desktop one.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
