GeForce GTX 660 OEM vs Radeon RX 6900 XT

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Aggregate performance score

We've compared Radeon RX 6900 XT and GeForce GTX 660 OEM, covering specs and all relevant benchmarks.

RX 6900 XT
2020
16 GB GDDR6, 300 Watt
69.42
+1966%

RX 6900 XT outperforms GTX 660 OEM by a whopping 1966% based on our aggregate benchmark results.

Primary details

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

Place in the ranking23736
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation29.89no data
Power efficiency15.861.77
ArchitectureRDNA 2.0 (2020−2024)Kepler (2012−2018)
GPU code nameNavi 21GK104
Market segmentDesktopDesktop
Release date28 October 2020 (4 years ago)22 August 2012 (12 years ago)
Launch price (MSRP)$999 no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

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 cores51201152
Core clock speed1825 MHz823 MHz
Boost clock speed2250 MHz888 MHz
Number of transistors26,800 million3,540 million
Manufacturing process technology7 nm28 nm
Power consumption (TDP)300 Watt130 Watt
Texture fill rate720.085.25
Floating-point processing power23.04 TFLOPS2.046 TFLOPS
ROPs12832
TMUs32096
Ray Tracing Cores80no 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).

InterfacePCIe 4.0 x16PCIe 3.0 x16
Length267 mm241 mm
Width3-slot2-slot
Supplementary power connectors2x 8-pin1x 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 typeGDDR6GDDR5
Maximum RAM amount16 GB2 GB
Memory bus width256 Bit256 Bit
Memory clock speed2000 MHz1400 MHz
Memory bandwidth512.0 GB/s179.2 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 Connectors1x HDMI, 2x DisplayPort, 1x USB Type-C2x DVI, 1x HDMI, 1x DisplayPort
HDMI++

API compatibility

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

DirectX12 Ultimate (12_2)12 (11_0)
Shader Model6.55.1
OpenGL4.64.6
OpenCL2.11.2
Vulkan1.21.1.126
CUDA-3.0

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:

Full HD196
+2078%
9−10
−2078%
1440p130
+2067%
6−7
−2067%
4K81
+2600%
3−4
−2600%

Cost per frame, $

1080p5.10no data
1440p7.68no data
4K12.33no data

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077 130−140
+2150%
6−7
−2150%

Full HD
Medium Preset

Assassin's Creed Odyssey 117
+2240%
5−6
−2240%
Assassin's Creed Valhalla 169
+2013%
8−9
−2013%
Battlefield 5 220−230
+2120%
10−11
−2120%
Call of Duty: Modern Warfare 110−120
+2280%
5−6
−2280%
Cyberpunk 2077 130−140
+2150%
6−7
−2150%
Far Cry 5 110−120
+2240%
5−6
−2240%
Far Cry New Dawn 170−180
+2025%
8−9
−2025%
Forza Horizon 4 230−240
+2280%
10−11
−2280%
Hitman 3 120−130
+2050%
6−7
−2050%
Horizon Zero Dawn 250−260
+2008%
12−14
−2008%
Metro Exodus 150−160
+2114%
7−8
−2114%
Red Dead Redemption 2 120−130
+2340%
5−6
−2340%
Shadow of the Tomb Raider 290−300
+1993%
14−16
−1993%
Watch Dogs: Legion 150−160
+2071%
7−8
−2071%

Full HD
High Preset

Assassin's Creed Odyssey 279
+2225%
12−14
−2225%
Assassin's Creed Valhalla 142
+2267%
6−7
−2267%
Battlefield 5 220−230
+2120%
10−11
−2120%
Call of Duty: Modern Warfare 110−120
+2280%
5−6
−2280%
Cyberpunk 2077 130−140
+2150%
6−7
−2150%
Far Cry 5 110−120
+2240%
5−6
−2240%
Far Cry New Dawn 170−180
+2025%
8−9
−2025%
Forza Horizon 4 230−240
+2280%
10−11
−2280%
Hitman 3 120−130
+2050%
6−7
−2050%
Horizon Zero Dawn 250−260
+2008%
12−14
−2008%
Metro Exodus 150−160
+2114%
7−8
−2114%
Red Dead Redemption 2 120−130
+2340%
5−6
−2340%
Shadow of the Tomb Raider 290−300
+1993%
14−16
−1993%
The Witcher 3: Wild Hunt 140−150
+2029%
7−8
−2029%
Watch Dogs: Legion 150−160
+2071%
7−8
−2071%

Full HD
Ultra Preset

Assassin's Creed Odyssey 98
+2350%
4−5
−2350%
Assassin's Creed Valhalla 137
+2183%
6−7
−2183%
Call of Duty: Modern Warfare 110−120
+2280%
5−6
−2280%
Cyberpunk 2077 130−140
+2150%
6−7
−2150%
Far Cry 5 110−120
+2240%
5−6
−2240%
Forza Horizon 4 248
+1967%
12−14
−1967%
Hitman 3 120−130
+2050%
6−7
−2050%
Horizon Zero Dawn 283
+2258%
12−14
−2258%
Shadow of the Tomb Raider 290−300
+1993%
14−16
−1993%
The Witcher 3: Wild Hunt 164
+2243%
7−8
−2243%
Watch Dogs: Legion 121
+2320%
5−6
−2320%

Full HD
Epic Preset

Red Dead Redemption 2 120−130
+2340%
5−6
−2340%

1440p
High Preset

Battlefield 5 160−170
+2257%
7−8
−2257%
Far Cry New Dawn 110−120
+2120%
5−6
−2120%

1440p
Ultra Preset

Assassin's Creed Odyssey 99
+2375%
4−5
−2375%
Assassin's Creed Valhalla 109
+2080%
5−6
−2080%
Call of Duty: Modern Warfare 80−85
+2600%
3−4
−2600%
Cyberpunk 2077 70−75
+2367%
3−4
−2367%
Far Cry 5 80−85
+2633%
3−4
−2633%
Forza Horizon 4 270−280
+2158%
12−14
−2158%
Hitman 3 100−110
+2425%
4−5
−2425%
Horizon Zero Dawn 224
+2140%
10−11
−2140%
Metro Exodus 117
+2240%
5−6
−2240%
Shadow of the Tomb Raider 190−200
+2089%
9−10
−2089%
The Witcher 3: Wild Hunt 120−130
+2000%
6−7
−2000%
Watch Dogs: Legion 230−240
+2290%
10−11
−2290%

1440p
Epic Preset

Red Dead Redemption 2 110−120
+2180%
5−6
−2180%

4K
High Preset

Battlefield 5 85−90
+2075%
4−5
−2075%
Far Cry New Dawn 65−70
+2200%
3−4
−2200%
Hitman 3 83
+1975%
4−5
−1975%
Horizon Zero Dawn 220−230
+2160%
10−11
−2160%
Metro Exodus 110−120
+2100%
5−6
−2100%
The Witcher 3: Wild Hunt 122
+2340%
5−6
−2340%

4K
Ultra Preset

Assassin's Creed Odyssey 68
+2167%
3−4
−2167%
Assassin's Creed Valhalla 66
+2100%
3−4
−2100%
Call of Duty: Modern Warfare 50−55
+2450%
2−3
−2450%
Cyberpunk 2077 35−40
+3400%
1−2
−3400%
Far Cry 5 50−55
+2400%
2−3
−2400%
Forza Horizon 4 162
+2214%
7−8
−2214%
Shadow of the Tomb Raider 110−120
+2100%
5−6
−2100%
Watch Dogs: Legion 54
+2600%
2−3
−2600%

4K
Epic Preset

Red Dead Redemption 2 75−80
+2400%
3−4
−2400%

This is how RX 6900 XT and GTX 660 OEM compete in popular games:

  • RX 6900 XT is 2078% faster in 1080p
  • RX 6900 XT is 2067% faster in 1440p
  • RX 6900 XT is 2600% faster in 4K

Pros & cons summary


Performance score 69.42 3.36
Recency 28 October 2020 22 August 2012
Maximum RAM amount 16 GB 2 GB
Chip lithography 7 nm 28 nm
Power consumption (TDP) 300 Watt 130 Watt

RX 6900 XT has a 1966.1% higher aggregate performance score, an age advantage of 8 years, a 700% higher maximum VRAM amount, and a 300% more advanced lithography process.

GTX 660 OEM, on the other hand, has 130.8% lower power consumption.

The Radeon RX 6900 XT is our recommended choice as it beats the GeForce GTX 660 OEM in performance tests.


Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.

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AMD Radeon RX 6900 XT
Radeon RX 6900 XT
NVIDIA GeForce GTX 660 OEM
GeForce GTX 660 OEM

Comparisons with similar GPUs

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Community ratings

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Questions & comments

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