Radeon RX 6600 XT vs RX 6900 XT

Place in performance ranking	18	78
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	21.43	47.95
Architecture	Navi / RDNA2 (2020−2022)	Navi / RDNA2 (2020−2022)
GPU code name	Navi 21	Navi 23
Market segment	Desktop	Desktop
Release date	8 December 2020 (3 years ago)	30 July 2021 (2 years ago)
Launch price (MSRP)	$999	$379
Current price	$957 (1x MSRP)	$283 (0.7x MSRP)

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

RX 6600 XT has 124% better value for money than RX 6900 XT.

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	5120	2048
Core clock speed	1825 MHz	1968 MHz
Boost clock speed	2250 MHz	2589 MHz
Number of transistors	26,800 million	11,060 million
Manufacturing process technology	7 nm	7 nm
Power consumption (TDP)	300 Watt	160 (TGP) Watt
Texture fill rate	720.0	331.4

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).

Interface	PCIe 4.0 x16	PCIe 4.0 x8
Length	267 mm	190 mm
Width	3-slot	2-slot
Supplementary power connectors	2x 8-pin	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	GDDR6	GDDR6
Maximum RAM amount	16 GB	8 GB
Memory bus width	256 Bit	128 Bit
Memory clock speed	16000 MHz	16000 MHz
Memory bandwidth	512.0 GB/s	256.0 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	1x HDMI, 2x DisplayPort, 1x USB Type-C	1x HDMI, 2x DisplayPort
HDMI	+	+

API compatibility

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

DirectX	12 Ultimate (12_2)	12.0 Ultimate (12_2)
Shader Model	6.5	6.5
OpenGL	4.6	4.6
OpenCL	2.1	2.1
Vulkan	1.2	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.

RX 6900 XT 69.48
+63.1%

RX 6600 XT 42.61

RX 6900 XT outperforms RX 6600 XT by 63% based on our aggregated benchmark results.

Passmark

This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. 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.

Benchmark coverage: 25%

RX 6900 XT 26862
+63%

RX 6600 XT 16475

RX 6900 XT outperforms RX 6600 XT by 63% in Passmark.

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.

Benchmark coverage: 17%

RX 6900 XT 59119
+51.4%

RX 6600 XT 39051

RX 6900 XT outperforms RX 6600 XT by 51% in 3DMark 11 Performance GPU.

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.

Benchmark coverage: 14%

RX 6900 XT 50587
+78.5%

RX 6600 XT 28342

RX 6900 XT outperforms RX 6600 XT by 78% in 3DMark Fire Strike Graphics.

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 HD	202 +62.9%	124 −62.9%
1440p	129 +76.7%	73 −76.7%
4K	89 +107%	43 −107%

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

130−140
+70.9%

−70.9%

Full HD
Medium Preset

Assassin's Creed Odyssey	117 +60.3%	70−75 −60.3%
Assassin's Creed Valhalla	169 +31%	129 −31%
Battlefield 5	220−230 +62.8%	130−140 −62.8%
Call of Duty: Modern Warfare	140−150 +53.2%	90−95 −53.2%
Cyberpunk 2077	130−140 +73.1%	78 −73.1%
Far Cry 5	100−110 +29.8%	80−85 −29.8%
Far Cry New Dawn	140−150 +35.6%	100−110 −35.6%
Forza Horizon 4	283 +121%	120−130 −121%
Hitman 3	283 +28.1%	221 −28.1%
Horizon Zero Dawn	442 +52.9%	289 −52.9%
Metro Exodus	130−140 +24.5%	100−110 −24.5%
Red Dead Redemption 2	120−130 +24%	100−105 −24%
Shadow of the Tomb Raider	280−290 +10.9%	257 −10.9%
Watch Dogs: Legion	190 +58.3%	120 −58.3%

Full HD
High Preset

Assassin's Creed Odyssey	106 +45.2%	70−75 −45.2%
Assassin's Creed Valhalla	142 +34%	106 −34%
Battlefield 5	220−230 +62.8%	130−140 −62.8%
Call of Duty: Modern Warfare	140−150 +53.2%	90−95 −53.2%
Cyberpunk 2077	130−140 +77.6%	76 −77.6%
Far Cry 5	100−110 +67.7%	65 −67.7%
Far Cry New Dawn	62 −3.2%	64 +3.2%
Forza Horizon 4	279 +118%	120−130 −118%
Hitman 3	61 −54.1%	94 +54.1%
Horizon Zero Dawn	395 +69.5%	233 −69.5%
Metro Exodus	123 −3.3%	127 +3.3%
Red Dead Redemption 2	120−130 +24%	100−105 −24%
Shadow of the Tomb Raider	100 −70%	170 +70%
The Witcher 3: Wild Hunt	323 +83.5%	176 −83.5%
Watch Dogs: Legion	170 +63.5%	104 −63.5%

Full HD
Ultra Preset

Assassin's Creed Odyssey	98 +34.2%	70−75 −34.2%
Assassin's Creed Valhalla	137 +82.7%	75 −82.7%
Call of Duty: Modern Warfare	140−150 +53.2%	90−95 −53.2%
Cyberpunk 2077	130−140 +95.7%	69 −95.7%
Far Cry 5	100−110 +29.8%	80−85 −29.8%
Forza Horizon 4	248 +93.8%	120−130 −93.8%
Horizon Zero Dawn	283 +80.3%	157 −80.3%
Metro Exodus	118 +5.4%	112 −5.4%
The Witcher 3: Wild Hunt	164 +65.7%	99 −65.7%
Watch Dogs: Legion	121 +98.4%	61 −98.4%

Full HD
Epic Preset

Red Dead Redemption 2

120−130
+24%

100−105

−24%

1440p
High Preset

Battlefield 5	160−170 +100%	80−85 −100%
Far Cry New Dawn	140−150 +44%	100−105 −44%
Hitman 3	121 +120%	55 −120%
Red Dead Redemption 2	82 +134%	35−40 −134%

1440p
Ultra Preset

Assassin's Creed Odyssey	99 +115%	45−50 −115%
Assassin's Creed Valhalla	109 +94.6%	56 −94.6%
Call of Duty: Modern Warfare	100−110 +60.6%	65−70 −60.6%
Cyberpunk 2077	70−75 +85%	40 −85%
Far Cry 5	130−140 +26.7%	105 −26.7%
Forza Horizon 4	231 +157%	90−95 −157%
Horizon Zero Dawn	224 +93.1%	116 −93.1%
Metro Exodus	117 +19.4%	98 −19.4%
Shadow of the Tomb Raider	190−200 +66.9%	118 −66.9%
The Witcher 3: Wild Hunt	120−130 +100%	60−65 −100%
Watch Dogs: Legion	91 +107%	44 −107%

4K
High Preset

Far Cry 5	85−90 +113%	40 −113%
Far Cry New Dawn	110−120 +96.4%	55−60 −96.4%
Hitman 3	83 +152%	33 −152%
Horizon Zero Dawn	100−110 +94.5%	55−60 −94.5%
Shadow of the Tomb Raider	85 +113%	40 −113%
The Witcher 3: Wild Hunt	122 +126%	54 −126%

4K
Ultra Preset

Assassin's Creed Odyssey	68 +134%	27−30 −134%
Assassin's Creed Valhalla	66 +136%	28 −136%
Battlefield 5	134 +158%	50−55 −158%
Call of Duty: Modern Warfare	75−80 +81%	40−45 −81%
Cyberpunk 2077	35−40 +150%	14 −150%
Forza Horizon 4	162 +170%	60−65 −170%
Horizon Zero Dawn	137 +108%	66 −108%
Metro Exodus	101 +90.6%	53 −90.6%
Watch Dogs: Legion	54 +125%	24 −125%

4K
Epic Preset

Red Dead Redemption 2

75−80
+97.4%

35−40

−97.4%

This is how RX 6900 XT and RX 6600 XT compete in popular games:

RX 6900 XT is 63% faster in 1080p
RX 6900 XT is 77% faster in 1440p
RX 6900 XT is 107% faster in 4K

Here's the range of performance differences observed across popular games:

in Forza Horizon 4, with 4K resolution and the Ultra Preset, the RX 6900 XT is 170% faster than the RX 6600 XT.
in Shadow of the Tomb Raider, with 1080p resolution and the High Preset, the RX 6600 XT is 70% faster than the RX 6900 XT.

All in all, in popular games: