NVIDIA GeForce GT 640 vs AMD Radeon HD 6770

Price now 147$
Games supported 59%
AMD Radeon HD 6770
Radeon HD 6770
  • Interface PCIe 2.0 x16
  • Core clock speed 0
  • Max video memory 1024 MB
  • Memory type GDDR5
  • Memory clock speed 1050
  • Maximum resolution
NVIDIA GeForce GT 640
NVIDIA GeForce GT 640
  • Interface PCIe 3.0 x16
  • Core clock speed 902 MHz
  • Max video memory 2 GB
  • Memory type DDR3
  • Memory clock speed 1782 MHz
  • Maximum resolution
Price now 178$
Games supported 59%

General info

Comparison of graphics card architecture, market segment, value for money and other general parameters.

Place in performance rating632647
Value for money0.380.28
ArchitectureTeraScale 2 (2009−2015)Kepler (2012−2018)
GPU code nameJuniperGK107
Market segmentDesktopDesktop
Designreferenceno data
Release date21 January 2011
(12 years old)
5 June 2012
(10 years old)
Launch price (MSRP)$129 $99
Current price$147 (1.1x MSRP)$178 (1.8x MSRP)
Value for money

To calculate the index we compare the characteristics of graphics cards against their prices.

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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 cores800384
Core clock speedno data902 MHz
Boost clock speed900 MHzno data
Number of transistors1,040 million1,270 million
Manufacturing process technology40 nm28 nm
Thermal design power (TDP)108 Watt65 Watt
Texture fill rate34.0028.86
Floating-point performance1,360.0 gflops692.7 gflops

Compatibility, dimensions and requirements

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Bus supportPCIe 2.0 x16no data
InterfacePCIe 2.0 x16PCIe 3.0 x16
Length198 mm145 mm
Supplementary power connectors1x 6-pinNone


Parameters of memory installed: its type, size, bus, clock and resulting bandwidth. Note that GPUs integrated into processors have no dedicated VRAM and use a shared part of system RAM.

Memory typeGDDR5DDR3
Maximum RAM amount1 GB2 GB
Memory bus width128 Bit128 Bit
Memory clock speed1050 MHz1782 MHz
Memory bandwidth76.8 GB/s28.51 GB/s

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 Connectors2x DVI, 1x HDMI, 2x mini-DisplayPort1x DVI, 1x HDMI, 1x DisplayPort
Eyefinity1no data
DisplayPort support-no data


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

AppAcceleration-no data
CrossFire1no data
Enduro-no data
HD3D-no data
PowerTune-no data
TrueAudio-no data
ZeroCore-no data

API support

APIs supported, including particular versions of those APIs.

DirectXDirectX® 1112 (11_0)
Shader Model5.05.1
Vulkanno data1.1.126
Mantle-no data
CUDAno data3.0

Benchmark performance

Non-gaming benchmark performance comparison. Note that overall benchmark performance is measured in points in 0-100 range.

Overall score

This is our combined benchmark performance rating. 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.

HD 6770 3.15
GT 640 3.01
  • Passmark
  • 3DMark Fire Strike Graphics


This is probably the most ubiquitous benchmark, part of Passmark PerformanceTest suite. It gives the graphics card a thorough evaluation under various 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%

HD 6770 1239
GT 640 1183

Radeon HD 6770 outperforms GeForce GT 640 by 5% 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 seemingly made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic enough graphics and is quite taxing on hardware.

Benchmark coverage: 13%

HD 6770 1520
GT 640 1560

GeForce GT 640 outperforms Radeon HD 6770 by 3% in 3DMark Fire Strike Graphics.

Mining hashrates

Cryptocurrency mining performance of Radeon HD 6770 and GeForce GT 640. Usually measured in megahashes per second.

Bitcoin / BTC (SHA256) 118 Mh/s 24 Mh/s

Gaming performance

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

Advantages and disadvantages

Performance rating 3.15 3.01
Recency 21 January 2011 5 June 2012
Cost $129 $99
Pipelines / CUDA cores 800 384
Memory bandwidth 76.8 28.51
Chip lithography 40 nm 28 nm
Thermal design power (TDP) 108 Watt 65 Watt

Technical City couldn't decide between

AMD Radeon HD 6770
Radeon HD 6770


NVIDIA GeForce GT 640
GeForce GT 640

The differences in performance seem too small.

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

Cast your vote

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite graphics card.

Competitors of Radeon HD 6770 by NVIDIA

According to our data, the nearest equivalent to Radeon HD 6770 by NVIDIA is GeForce GTX 260, which is slower by 2% and lower by 2 positions in our rating.

NVIDIA GeForce GTX 260 GeForce GTX 260

Here are some closest NVIDIA rivals to Radeon HD 6770:

Radeon HD 6770 100

Competitors of GeForce GT 640 by AMD

The nearest GeForce GT 640's AMD equivalent is Radeon HD 7730, which is faster by 1% and higher by 2 positions in our performance rating.

AMD Radeon HD 7730 Radeon HD 7730

Here are some closest AMD rivals to GeForce GT 640:

GeForce GT 640 100

Similar GPU comparisons

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

User rating

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

3.6 241 rating

Rate AMD Radeon HD 6770 on a scale of 1 to 5:

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3.4 771 rating

Rate NVIDIA GeForce GT 640 on a scale of 1 to 5:

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Questions and comments

Here you can ask a question about this comparison, agree or disagree with our judgements, or report an error or mismatch.