Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 Radeon R7 240 v2 Sapphire 1GB Edition
Cyberpunk 2077 653% 617%
Assassins Creed: Valhalla 589% 556%
Call of Duty: Black Ops Cold War 567% 535%
FIFA 21 280% 262%
Grand Theft Auto VI 960% 910%
Hitman 3 880% 833%
Genshin Impact 653% 617%
Far Cry 6 990% 938%
World of Warcraft: Shadowlands 980% 929%
Watch Dogs Legion 627% 592%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R7 240 v2 Sapphire 1GB Edition are marginally better than the Nvidia GeForce GT 640.

The GeForce GT 640 has a 172 MHz higher core clock speed and 12 more Texture Mapping Units than the R7 240. This results in the GeForce GT 640 providing 14.3 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 172 MHz higher core clock speed and 8 more Render Output Units than the R7 240. This results in the GeForce GT 640 providing 8.6 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 R7 240 was released over a year more recently than the GeForce GT 640, and so the R7 240 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GeForce GT 640.

The GeForce GT 640 has 1024 MB more video memory than the R7 240, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the R7 240 has superior memory performance.

The R7 240 has 45.1 GB/sec greater memory bandwidth than the GeForce GT 640, which means that the memory performance of the R7 240 is noticeably better than the GeForce GT 640.

The GeForce GT 640 has 384 Shader Processing Units and the Radeon R7 240 v2 Sapphire 1GB Edition has 320. However, the actual shader performance of the GeForce GT 640 is 346 and the actual shader performance of the R7 240 is 212. The GeForce GT 640 having 134 better shader performance is not particularly notable, as altogether the R7 240 performs better when taking into account other relevant data.

The GeForce GT 640 requires 65 Watts to run and the Radeon R7 240 v2 Sapphire 1GB Edition requires 30 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 R7 240. The GeForce GT 640 requires 35 Watts more than the R7 240 to run. The difference is significant enough that the GeForce GT 640 may have a slight adverse affect on your yearly electricity bills in comparison to the R7 240.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed902 MHzvs730 MHz
Boost Clock-vs780 MHz
ArchitectureKepler GK107-300-A2GCN 1.1 Oland PRO
OC Potential Fair vs Good
Driver Support Good vs Great
Release Date05 Jun 2012vs08 Oct 2013
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
6.6
vs green tick
6.8
1600x900
5.1
vs green tick
5.2
1920x1080
3.5
vs green tick
3.7
2560x1440
2.5
green tick vs green tick
2.5
3840x2160
1.7
green tick vs green tick
1.7

GPU Memory

Memory2048 MBvs1024 MB
Memory Speed891 MHzvs1150 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeDDR3vsGDDR5
Memory Bandwidth28.5GB/secvs73.6GB/sec
L2 Cache 256 KB vs green tick 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs320
Actual Shader Performance17%vs10%
Technology28nmvs28nm
Texture Mapping Units32vs20
Texture Rate28.9 GTexel/svs14.6 GTexel/s
Render Output Units16vs8
Pixel Rate14.4 GPixel/svs5.8 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections1vs1
DVI Connections1vs1
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power65 Wattsvs30 Watts
Recommended PSU350 Watts & 26 Ampsvs400 Watts & 18 Amps

GPU Features

DirectX12.0vs12.0
Shader Model5.0vs5.0
Open GL4.5vs4.4
Open CL-vs-
Notebook GPUnono
SLI/Crossfirenovsno
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHzvsIntel Core i3-4130 3.4GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1600x900

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.

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.
Radeon R7 240 v2 Sapphire 1GB Edition is a special edition of Radeon R7 240 v2 1GB.

This edition comes a small overclock in its memory clock which was increased from 1125MHz to 1150MHz.

The overclock is not significant enough to yield any performance boost and so Radeon R7 240 v2 Sapphire 1GB Edition performs exactly like the reference AMD Radeon R7 240 v2 1GB.
Recommended CPU
Possible GPU Upgrades
-
GPU Variants
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