Radeon RX 6600 vs HD 6990M

VS

Aggregate performance score

We've compared Radeon HD 6990M with Radeon RX 6600, including specs and performance data.

HD 6990M
2011
2 GB GDDR5, 100 Watt
5.28

RX 6600 outperforms HD 6990M by a whopping 645% based on our aggregate benchmark results.

Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking628123
Place by popularitynot in top-10014
Cost-effectiveness evaluationno data66.44
Power efficiency3.6220.43
ArchitectureTeraScale 2 (2009−2015)RDNA 2.0 (2020−2024)
GPU code nameBlackcombNavi 23
Market segmentLaptopDesktop
Release date12 July 2011 (13 years ago)13 October 2021 (3 years ago)
Launch price (MSRP)no data$329

Cost-effectiveness evaluation

The higher the performance-to-price ratio, the better. We use the manufacturer's recommended prices for comparison.

no data

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 cores11201792
Core clock speed715 MHz1626 MHz
Boost clock speedno data2491 MHz
Number of transistors1,700 million11,060 million
Manufacturing process technology40 nm7 nm
Power consumption (TDP)100 Watt132 Watt
Texture fill rate40.04279.0
Floating-point processing power1.602 TFLOPS8.928 TFLOPS
ROPs3264
TMUs56112
Ray Tracing Coresno data28

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 sizelargeno data
InterfaceMXM-B (3.0)PCIe 4.0 x8
Lengthno data190 mm
Widthno data2-slot
Supplementary power connectorsNone1x 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 typeGDDR5GDDR6
Maximum RAM amount2 GB8 GB
Memory bus width256 Bit128 Bit
Memory clock speed900 MHz1750 MHz
Memory bandwidth115.2 GB/s224.0 GB/s
Shared memory--
Resizable BAR-+

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 ConnectorsNo outputs1x HDMI, 3x DisplayPort
HDMI-+

API and SDK compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX11.2 (11_0)12.0 Ultimate (12_2)
Shader Model5.06.5
OpenGL4.44.6
OpenCL1.22.1
VulkanN/A1.2

Synthetic benchmark performance

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.

HD 6990M 5.28
RX 6600 39.35
+645%

  • Other tests
    • 3DMark 11 Performance GPU
    • 3DMark Vantage Performance

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.

HD 6990M 3227
RX 6600 31774
+885%

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.

HD 6990M 15113
RX 6600 94734
+527%

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:

900p54
−641%
400−450
+641%
Full HD60
−85%
111
+85%
1440p7−8
−700%
56
+700%
4K4−5
−650%
30
+650%

Cost per frame, $

1080pno data2.96
1440pno data5.88
4Kno data10.97

FPS performance in popular games

  • Full HD
    Low Preset
  • Full HD
    Medium Preset
  • Full HD
    High Preset
  • Full HD
    Ultra Preset
  • Full HD
    Epic Preset
  • 1440p
    High Preset
  • 1440p
    Ultra Preset
  • 1440p
    Epic Preset
  • 4K
    High Preset
  • 4K
    Ultra Preset
  • 4K
    Epic Preset
  • 4K
    High Preset
Atomic Heart 12−14
−1308%
169
+1308%
Counter-Strike 2 10−12
−909%
111
+909%
Cyberpunk 2077 10−11
−970%
107
+970%
Atomic Heart 12−14
−900%
120
+900%
Battlefield 5 20−22
−535%
120−130
+535%
Counter-Strike 2 10−12
−664%
84
+664%
Cyberpunk 2077 10−11
−810%
91
+810%
Far Cry 5 14−16
−1000%
154
+1000%
Fortnite 27−30
−452%
160−170
+452%
Forza Horizon 4 21−24
−513%
140−150
+513%
Forza Horizon 5 10−12
−1018%
123
+1018%
PLAYERUNKNOWN'S BATTLEGROUNDS 18−20
−663%
140−150
+663%
Valorant 60−65
−254%
210−220
+254%
Atomic Heart 12−14
−483%
70
+483%
Battlefield 5 20−22
−535%
120−130
+535%
Counter-Strike 2 10−12
−518%
68
+518%
Counter-Strike: Global Offensive 85−90
−226%
270−280
+226%
Cyberpunk 2077 10−11
−630%
73
+630%
Dota 2 40−45
−257%
150
+257%
Far Cry 5 14−16
−914%
142
+914%
Fortnite 27−30
−452%
160−170
+452%
Forza Horizon 4 21−24
−513%
140−150
+513%
Forza Horizon 5 10−12
−791%
98
+791%
Grand Theft Auto V 16−18
−706%
137
+706%
Metro Exodus 9−10
−811%
82
+811%
PLAYERUNKNOWN'S BATTLEGROUNDS 18−20
−663%
140−150
+663%
The Witcher 3: Wild Hunt 12−14
−1031%
147
+1031%
Valorant 60−65
−254%
210−220
+254%
Battlefield 5 20−22
−535%
120−130
+535%
Counter-Strike 2 10−12
−436%
59
+436%
Cyberpunk 2077 10−11
−490%
59
+490%
Dota 2 40−45
−155%
107
+155%
Far Cry 5 14−16
−857%
134
+857%
Forza Horizon 4 21−24
−513%
140−150
+513%
Forza Horizon 5 10−12
−673%
85
+673%
PLAYERUNKNOWN'S BATTLEGROUNDS 18−20
−663%
140−150
+663%
The Witcher 3: Wild Hunt 12−14
−592%
90
+592%
Valorant 60−65
−254%
210−220
+254%
Fortnite 27−30
−452%
160−170
+452%
Counter-Strike 2 7−8
−314%
27−30
+314%
Counter-Strike: Global Offensive 35−40
−558%
250−260
+558%
Grand Theft Auto V 5−6
−1180%
64
+1180%
Metro Exodus 4−5
−1100%
48
+1100%
PLAYERUNKNOWN'S BATTLEGROUNDS 30−35
−415%
170−180
+415%
Valorant 55−60
−353%
240−250
+353%
Battlefield 5 5−6
−1780%
90−95
+1780%
Cyberpunk 2077 4−5
−750%
34
+750%
Far Cry 5 9−10
−911%
91
+911%
Forza Horizon 4 12−14
−758%
100−110
+758%
Forza Horizon 5 7−8
−757%
60
+757%
The Witcher 3: Wild Hunt 8−9
−738%
65−70
+738%
Fortnite 10−11
−850%
95−100
+850%
Atomic Heart 4−5
−625%
27−30
+625%
Counter-Strike 2 0−1 18−20
Grand Theft Auto V 16−18
−253%
60
+253%
The Witcher 3: Wild Hunt 1−2
−4300%
44
+4300%
Valorant 24−27
−788%
220−230
+788%
Battlefield 5 2−3
−2800%
55−60
+2800%
Counter-Strike 2 0−1 7
Cyberpunk 2077 1−2
−1300%
14
+1300%
Dota 2 16−18
−400%
85
+400%
Far Cry 5 5−6
−780%
44
+780%
Forza Horizon 4 7−8
−871%
65−70
+871%
Forza Horizon 5 3−4
−867%
29
+867%
PLAYERUNKNOWN'S BATTLEGROUNDS 5−6
−840%
45−50
+840%
Fortnite 5−6
−820%
45−50
+820%
Metro Exodus 29
+0%
29
+0%

This is how HD 6990M and RX 6600 compete in popular games:

  • RX 6600 is 641% faster in 900p
  • RX 6600 is 85% faster in 1080p
  • RX 6600 is 700% faster in 1440p
  • RX 6600 is 650% 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 64 tests (98%)
  • there's a draw in 1 test (2%)

Pros & cons summary


Performance score 5.28 39.35
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 645.3% 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.

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AMD Radeon HD 6990M
Radeon HD 6990M
AMD Radeon RX 6600
Radeon RX 6600

Other comparisons

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Community ratings

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3.6
14 votes

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4.3
10560 votes

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