GeForce GT 640 Rev. 2 vs Radeon HD 6770

Place in the ranking	740	717
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.50	0.19
Power efficiency	2.08	5.02
Architecture	TeraScale 2 (2009−2015)	Kepler 2.0 (2013−2015)
GPU code name	Juniper	GK208
Market segment	Desktop	Desktop
Design	reference	no data
Release date	21 January 2011 (13 years ago)	29 May 2013 (11 years ago)
Launch price (MSRP)	$129	$89

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

HD 6770 has 163% better value for money than GT 640 Rev. 2.

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	384
Core clock speed	no data	1046 MHz
Boost clock speed	900 MHz	no data
Number of transistors	1,040 million	915 million
Manufacturing process technology	40 nm	28 nm
Power consumption (TDP)	108 Watt	49 Watt
Texture fill rate	34.00	33.47
Floating-point processing power	1.36 TFLOPS	0.8033 TFLOPS
ROPs	16	8
TMUs	40	32

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	no data
Interface	PCIe 2.0 x16	PCIe 2.0 x8
Length	198 mm	145 mm
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	GDDR5
Maximum RAM amount	1 GB	1 GB
Memory bus width	128 Bit	64 Bit
Memory clock speed	1050 MHz	1252 MHz
Memory bandwidth	76.8 GB/s	40.06 GB/s

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	2x DVI, 1x HDMI, 2x mini-DisplayPort	1x DVI, 1x HDMI, 1x VGA
Eyefinity	+	-
HDMI	+	+

Supported technologies

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

CrossFire

API compatibility

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

DirectX	DirectX® 11	12 (11_0)
Shader Model	5.0	5.1
OpenGL	4.4	4.6
OpenCL	1.2	1.2
Vulkan	-	1.1.126
CUDA	-	3.5

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Pros & cons summary

Performance score	3.24	3.55
Recency	21 January 2011	29 May 2013
Chip lithography	40 nm	28 nm
Power consumption (TDP)	108 Watt	49 Watt

GT 640 Rev. 2 has a 9.6% higher aggregate performance score, an age advantage of 2 years, a 42.9% more advanced lithography process, and 120.4% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Radeon HD 6770 and GeForce GT 640 Rev. 2.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.