Radeon RX 640 vs HD 6770 Green Edition

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Primary details

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

Place in the rankingnot rated657
Place by popularitynot in top-100not in top-100
Power efficiencyno data7.93
ArchitectureTeraScale 2 (2009−2015)GCN 4.0 (2016−2020)
GPU code nameJuniperPolaris 23
Market segmentDesktopLaptop
Release date19 April 2013 (12 years ago)13 May 2019 (6 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 cores720640
Core clock speed700 MHz1082 MHz
Boost clock speedno data1218 MHz
Number of transistors1,040 million2,200 million
Manufacturing process technology40 nm14 nm
Power consumption (TDP)86 Watt50 Watt
Texture fill rate25.2048.72
Floating-point processing power1.008 TFLOPS1.559 TFLOPS
ROPs1616
TMUs3640
L1 Cache72 KB160 KB
L2 Cache256 KB512 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).

Laptop sizeno datalarge
InterfacePCIe 2.0 x16PCIe 3.0 x8
Length170 mmno data
Width2-slotno data
Supplementary power connectorsno dataNone

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 typeGDDR3GDDR5
Maximum RAM amount2 GB2 GB
Memory bus width128 Bit64 Bit
Memory clock speed667 MHz1500 MHz
Memory bandwidth21.34 GB/s48 GB/s
Shared memory--

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 Connectors2x DVI, 1x HDMI, 2x mini-DisplayPortNo outputs
HDMI+-

Supported technologies

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

FreeSync-+

API and SDK support

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

DirectX11.2 (11_0)12 (12_0)
Shader Model5.06.4
OpenGL4.44.6
OpenCL1.22.0
VulkanN/A1.2.131

Pros & cons summary


Recency 19 April 2013 13 May 2019
Chip lithography 40 nm 14 nm
Power consumption (TDP) 86 Watt 50 Watt

RX 640 has an age advantage of 6 years, a 185.7% more advanced lithography process, and 72% lower power consumption.

We couldn't decide between Radeon HD 6770 Green Edition and Radeon RX 640. We've got no test results to judge.

Be aware that Radeon HD 6770 Green Edition is a desktop graphics card while Radeon RX 640 is a notebook one.

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AMD Radeon HD 6770 Green Edition
Radeon HD 6770 Green Edition
AMD Radeon RX 640
Radeon RX 640

Other comparisons

We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.

Community ratings

Here you can see the user ratings of the compared graphics cards, as well as rate them yourself.


3.7 14 votes

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3.2 272 votes

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