ATI Radeon X550 XTX vs GeForce GTX 660 OEM

Primary details

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

Place in the ranking	786	not rated
Place by popularity	not in top-100	not in top-100
Power efficiency	1.81	no data
Architecture	Kepler (2012−2018)	R400 (2004−2008)
GPU code name	GK104	RV410
Market segment	Desktop	Desktop
Release date	22 August 2012 (13 years ago)	24 January 2007 (18 years ago)

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 cores	1152	no data
Core clock speed	823 MHz	400 MHz
Boost clock speed	888 MHz	no data
Number of transistors	3,540 million	120 million
Manufacturing process technology	28 nm	110 nm
Power consumption (TDP)	130 Watt	no data
Texture fill rate	85.25	3.200
Floating-point processing power	2.046 TFLOPS	no data
ROPs	32	8
TMUs	96	8
L1 Cache	96 KB	no data
L2 Cache	512 KB	no 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).

Interface	PCIe 3.0 x16	PCIe 1.0 x16
Length	241 mm	no data
Width	2-slot	1-slot
Supplementary power connectors	1x 6-pin	None

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	DDR
Maximum RAM amount	2 GB	128 MB
Memory bus width	256 Bit	64 Bit
Memory clock speed	1400 MHz	300 MHz
Memory bandwidth	179.2 GB/s	4.8 GB/s

Connectivity and outputs

This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.

Display Connectors	2x DVI, 1x HDMI, 1x DisplayPort	1x DVI, 1x VGA, 1x S-Video
HDMI	+	-

API and SDK support

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

DirectX	12 (11_0)	9.0b (9_2)
Shader Model	5.1	no data
OpenGL	4.6	2.0
OpenCL	1.2	N/A
Vulkan	1.1.126	N/A
CUDA	3.0	-

Pros & cons summary

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Recency	22 August 2012	24 January 2007
Maximum RAM amount	2 GB	128 MB
Chip lithography	28 nm	110 nm

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