Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 4670 1GB GeForce GT 640
Cyberpunk 2077 842% 653%
Hitman 3 1125% 880%
Assassins Creed: Valhalla 761% 589%
Call of Duty: Black Ops Cold War 733% 567%
FIFA 21 375% 280%
Grand Theft Auto VI 1225% 960%
Far Cry 6 1263% 990%
Genshin Impact 842% 653%
Battlefield 6 1125% 880%
Resident Evil 8 842% 653%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 are noticeably better than the AMD Radeon HD 4670 1GB.

The GeForce GT 640 has a 152 MHz higher core clock speed and the same number of Texture Mapping Units as the HD 4670. This results in the GeForce GT 640 providing 4.9 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 152 MHz higher core clock speed and 8 more Render Output Units than the HD 4670. This results in the GeForce GT 640 providing 8.4 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 three years more recently than the HD 4670, and so the GeForce GT 640 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the HD 4670 when running the latest games.

The GeForce GT 640 has 1024 MB more video memory than the HD 4670, 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 4670, which means that the memory performance of the GeForce GT 640 is marginally better than the HD 4670.

The Radeon HD 4670 1GB has 320 Shader Processing Units and the GeForce GT 640 has 384. However, the actual shader performance of the HD 4670 is 168 and the actual shader performance of the GeForce GT 640 is 346. The GeForce GT 640 having 178 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce GT 640 delivers a marginally smoother and more efficient experience when processing graphical data than the HD 4670.

The GeForce GT 640 transistor size technology is 27 nm (nanometers) smaller than the HD 4670. This means that the GeForce GT 640 is expected to run slightly cooler and achieve higher clock frequencies than the HD 4670.

The Radeon HD 4670 1GB requires 59 Watts to run and the GeForce GT 640 requires 65 Watts. We would recommend a PSU with at least 400 Watts for the HD 4670 and a PSU with at least 350 Watts for the GeForce GT 640. The GeForce GT 640 requires 6 Watts more than the HD 4670 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 4670.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed750 MHzvs902 MHz
Boost Clock-vs-
ArchitectureR700 RV730 XTKepler GK107-300-A2
OC Potential Poor vs Fair
Driver Support Poor vs Good
Release Date10 Sep 2008vs05 Jun 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - vs green tick
6.6
1600x900
4.4
vs green tick
5.1
1920x1080
3
vs green tick
3.5
2560x1440
2.1
vs green tick
2.5
3840x2160
1.4
vs green tick
1.7

GPU Memory

Memory1024 MBvs2048 MB
Memory Speed800 MHzvs891 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeGDDR3vsDDR3
Memory Bandwidth25.6GB/secvs28.5GB/sec
L2 Cache 0 KB vs green tick 256 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units320vs384
Actual Shader Performance8%vs17%
Technology55nmvs28nm
Texture Mapping Units32vs32
Texture Rate24 GTexel/svs28.9 GTexel/s
Render Output Units8vs16
Pixel Rate6 GPixel/svs14.4 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections1vs1
DVI Connections1vs1
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power59 Wattsvs65 Watts
Recommended PSU400 Watts & 29 Ampsvs350 Watts & 26 Amps

GPU Features

DirectX10.1vs12.0
Shader Model4.1vs5.0
Open GL3.3vs4.5
Open CL-vs-
Notebook GPUnono
SLI/Crossfireyesvsno
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core 2 Duo E8400 3.0GHzvsIntel Core i3-3220 3.3GHz
Recommended RAM4 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1366x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
Radeon HD 4670 1GB is a Fast-Middle-Class Graphics Card based on the R700 Architecture.

Architecture
R700 was AMD's Second Unified Shader Architecture.

GPU
It equips a GPU Codenamed RV730 XT which has 4 Compute Units activated and thus offers 320 Shader Processing Units, 32 TMUs and 8 ROPs. The Central Unit is clocked at 750MHz.

Memory
The GPU accesses a 1GB frame buffer of GDDR3, through a 128-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 800MHz.

Features
DirectX 10.1 Support (10.0 Hardware Default) and support for Crossfire.



Power Consumption
With a rated board TDP of 59W, it requires at least a 400W PSU and it relies entirely on the PCI slot for power meaning no extra connectors are required.

Performance
Gaming benchmarks put its performance somewhat below a GeForce GT 240.
Overview
GeForce GT 640 is a Middle-Class Graphics Card based on the first revision of the Kepler Architecture.

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.

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.

Memory
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.

Features
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.

Performance
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.
Recommended CPU
Possible GPU Upgrades
GPU Variants
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