Radeon RX 6600 XT vs GeForce GTX 660

Place in performance ranking	403	79
Place by popularity	60	51
Value for money	2.34	47.20
Architecture	Kepler (2012−2018)	Navi / RDNA2 (2020−2022)
GPU code name	GK106	Navi 23
Market segment	Desktop	Desktop
Release date	6 September 2012 (11 years old)	30 July 2021 (2 years old)
Launch price (MSRP)	$229	$379
Current price	$172 (0.8x MSRP)	$283 (0.7x MSRP)

Value for money

Performance to price ratio. The higher, the better.

RX 6600 XT has 1917% better value for money than GTX 660.

Technical specs

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	960	2048
CUDA cores	960	no data
Core clock speed	980 MHz	1968 MHz
Boost clock speed	1033 MHz	2589 MHz
Number of transistors	2,540 million	11,060 million
Manufacturing process technology	28 nm	7 nm
Power consumption (TDP)	140 Watt	160 (TGP) Watt
Texture fill rate	78.4 billion/sec	331.4
Floating-point performance	1,981 gflops	no data

Size and 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).

Bus support	PCI Express 3.0	no data
Interface	PCIe 3.0 x16	PCIe 4.0 x8
Length	9.5" (24.1 cm)	190 mm
Height	4.376" (11.1 cm)	no data
Width	2-slot	2-slot
Supplementary power connectors	One 6-pin	1x 8-pin
SLI options	+	no data

Memory

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	192-bit GDDR5	128 Bit
Memory clock speed	6.0 GB/s	16000 MHz
Memory bandwidth	144.2 GB/s	256.0 GB/s
Shared memory	no data	-

Video outputs and ports

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	One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort	1x HDMI, 2x DisplayPort
Multi monitor support	4 displays	no data
HDMI	+	+
HDCP	+	no data
Maximum VGA resolution	2048x1536	no data
Audio input for HDMI	Internal	no data

Technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

3D Blu-Ray	+	no data
3D Gaming	+	no data
3D Vision	+	no data

API support

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

DirectX	12 (11_0)	12.0 Ultimate (12_2)
Shader Model	5.1	6.5
OpenGL	4.3	4.6
OpenCL	1.2	2.1
Vulkan	1.1.126	1.2
CUDA	+	no data

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.

GTX 660 10.32

RX 6600 XT 42.56
+312%

Radeon RX 6600 XT outperforms GeForce GTX 660 by 312% 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%

GTX 660 3998

RX 6600 XT 16485
+312%

Radeon RX 6600 XT outperforms GeForce GTX 660 by 312% in Passmark.

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%

GTX 660 5040

RX 6600 XT 28342
+462%

Radeon RX 6600 XT outperforms GeForce GTX 660 by 462% 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	47 −181%	132 +181%
1440p	16−18 −363%	74 +363%
4K	9−10 −356%	41 +356%

Advantages and disadvantages

Performance score	10.32	42.56
Recency	6 September 2012	30 July 2021
Cost	$229	$379
Maximum RAM amount	2 GB	8 GB
Chip lithography	28 nm	7 nm
Power consumption (TDP)	140 Watt	160 Watt