Radeon Sky 900 vs HD 6770

Primary details

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

Place in the ranking	812	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.54	no data
Power efficiency	2.17	no data
Architecture	TeraScale 2 (2009−2015)	GCN 1.0 (2012−2020)
GPU code name	Juniper	Tahiti
Market segment	Desktop	Workstation
Design	reference	no data
Release date	21 January 2011 (15 years ago)	27 March 2013 (13 years ago)
Launch price (MSRP)	$129	no data

Cost-effectiveness evaluation

The higher the ratio, the better. We use the manufacturer's recommended prices.

Performance to price scatter graph

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	800	3584 ×2
Core clock speed	no data	825 MHz
Boost clock speed	900 MHz	950 MHz
Number of transistors	1,040 million	4,313 million
Manufacturing process technology	40 nm	28 nm
Power consumption (TDP)	108 Watt	300 Watt
Texture fill rate	34.00	106.4 ×2
Floating-point processing power	1.36 TFLOPS	3.405 TFLOPS ×2
ROPs	16	32 ×2
TMUs	40	112 ×2
L1 Cache	80 KB	448 KB
L2 Cache	256 KB	768 KB

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).

Bus support	PCIe 2.0 x16	PCIe 3.0
Interface	PCIe 2.0 x16	PCIe 3.0 x16
Length	198 mm	305 mm
Width	2-slot	2-slot
Form factor	no data	full height / full length
Supplementary power connectors	1x 6-pin	2x 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	GDDR5	GDDR5
Maximum RAM amount	1 GB	6 GB ×2
Memory bus width	128 Bit	384 Bit ×2
Memory clock speed	1050 MHz	1250 MHz
Memory bandwidth	76.8 GB/s	480 GB/s ×2

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, 2x mini-DisplayPort	1x DVI, 1x mini-DisplayPort
Eyefinity	+	-
HDMI	+	-
Dual-link DVI support	-	+

Supported technologies

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

CrossFire

+

-

API and SDK support

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

DirectX	DirectX® 11	12 (11_1)
Shader Model	5.0	5.1
OpenGL	4.4	4.6
OpenCL	1.2	1.2
Vulkan	-	1.2.131

Pros & cons summary

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Recency	21 January 2011	27 March 2013
Maximum RAM amount	1 GB	6 GB
Chip lithography	40 nm	28 nm
Power consumption (TDP)	108 Watt	300 Watt