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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 Radeon HD 5670 1GB DDR3
Cyberpunk 2077 653% 896%
Hitman 3 880% 1196%
Resident Evil 8 653% 896%
Assassins Creed: Valhalla 589% 811%
FIFA 21 280% 403%
Grand Theft Auto VI 960% 1302%
Call of Duty: Black Ops Cold War 567% 782%
Genshin Impact 653% 896%
Far Cry 6 990% 1342%
The Medium 840% 1143%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 are noticeably better than the AMD Radeon HD 5670 1GB DDR3.

The GeForce GT 640 has a 127 MHz higher core clock speed and 12 more Texture Mapping Units than the HD 5670. This results in the GeForce GT 640 providing 13.4 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce GT 640 has a 127 MHz higher core clock speed and 8 more Render Output Units than the HD 5670. This results in the GeForce GT 640 providing 8.2 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GeForce GT 640 was released over a year more recently than the HD 5670, and so the GeForce GT 640 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the HD 5670.

The GeForce GT 640 has 1024 MB more video memory than the HD 5670, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GeForce GT 640 also has superior memory performance overall.

The GeForce GT 640 has 2.9 GB/sec greater memory bandwidth than the HD 5670, which means that the memory performance of the GeForce GT 640 is marginally better than the HD 5670.

The GeForce GT 640 has 384 Shader Processing Units and the Radeon HD 5670 1GB DDR3 has 400. However, the actual shader performance of the GeForce GT 640 is 346 and the actual shader performance of the HD 5670 is 202. The GeForce GT 640 having 144 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce GT 640 delivers a slightly smoother and more efficient experience when processing graphical data than the HD 5670.

The GeForce GT 640 transistor size technology is 12 nm (nanometers) smaller than the HD 5670. This means that the GeForce GT 640 is expected to run slightly cooler and achieve higher clock frequencies than the HD 5670.

The GeForce GT 640 requires 65 Watts to run and the Radeon HD 5670 1GB DDR3 requires 64 Watts. We would recommend a PSU with at least 350 Watts for the GeForce GT 640 and a PSU with at least 400 Watts for the HD 5670. The GeForce GT 640 requires 1 Watts more than the HD 5670 to run. The difference is not significant enough for the GeForce GT 640 to have a noticeably larger impact on your yearly electricity bills than the HD 5670.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed902 MHzvs775 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2Evergreen Redwood XT
OC Potential Fair vs Fair
Driver Support Good vs -
Release Date05 Jun 2012vs01 Jan 2010
GPU LinkGD LinkGD Link

Resolution Performance

green tick vs -
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green tick vs -
green tick vs -
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GPU Memory

Memory2048 MBvs1024 MB
Memory Speed891 MHzvs800 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeDDR3vsDDR3
Memory Bandwidth28.5GB/secvs25.6GB/sec
L2 Cache 256 KB green tick vs -
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units384vs400
Actual Shader Performance17%vs10%
Texture Mapping Units32vs20
Texture Rate28.9 GTexel/svs15.5 GTexel/s
Render Output Units16vs8
Pixel Rate14.4 GPixel/svs6.2 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections1vs1
DVI Connections1vs1
HDMI Connections1vs1
DisplayPort Connections-vs-

GPU Power Requirements

Max Power65 Wattsvs64 Watts
Recommended PSU350 Watts & 26 Ampsvs400 Watts & 25 Amps

GPU Features

Shader Model5.0vs5.0
Open GL4.5vs3.2
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHzvsIntel Pentium Dual Core E5500 2.8GHz
Recommended RAM8 GBvs4 GB
Maximum Recommended Gaming Resolution1366x768vs1366x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GT 640 is a Middle-Class Graphics Card based on the first revision of the Kepler Architecture.

The Kepler Architecture was NVIDIA's big step to power efficiency. Each Stream Multiprocessor (SMX) now hosts 192 Shader Processing Units - against the 48 of older Fermi Architecture, and has been redesigned being now clocked at the same speed of the Central Unit. This means they are more energy efficient and will consequently lead to cooler operating temperatures. However, it also means they are weaker. It can be said that one Fermi SMX is as fast as 2 Kepler SMXs.
Additionally, and not available in all GPUs, Kepler also introduced the Boost Clock Feature. The Boost Clock is an even higher Clock Speed activated when in gaming mode and becomes the effective speed of the GPU.

It equips a GPU Codenamed GK107-300-A2 which has 2 Stream Multiprocessor activated and thus offers 384 Shader Processing Units, 32 TMUs and 16 ROPs. The Central Unit is clocked at 902MHz.

The GPU accesses a 2GB frame buffer of DDR3, through a 128-bit memory interface. The size of the frame buffer is exaggerated and in no way benefits the GPU. The Memory Clock Operates at 891MHz.

DirectX 11.0 Support (11.0 Hardware Default) and support for Optimus, CUDA, OpenCL, DirectCompute, 3D Vision Surround, PhysX, Realtime Raytracing and other technologies

Power Consumption
With a rated board TDP of 65W, it requires at least a 350W PSU and it relies entirely on the PCI Slot for power, meaning no extra connectors are required.

Gaming benchmarks put its performance on average with Radeon HD 6670.

System Suggestions
We recommend a Modest Processor (Intel Core i3) and 8GB of RAM for a system with GeForce GT 640.
Radeon HD 5670 1GB DDR3 is one of the many variants of the Radeon HD 5670.
This version is equipped with 1GB of standard DDR3. Compared to the Radeon HD 5670 1GB GDDR5 the memory bandwidth is less than half because of the memory type used and because the memory clock is clocked at 800MHz instead of 1000Mhz.
The performance is considerably lower and the low memory bandwidth might become a bottleneck for the 1GB of video memory.
Therefore, modern demanding games like Skyrim V can be played smoothly at high settings but not paired with image improving techniques, such as AA and Tesselation.
Recommended CPU
Possible GPU Upgrades
GPU Variants