Select any two GPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 Radeon HD 4750
Cyberpunk 2077 653% 699%
Assassins Creed: Valhalla 589% 630%
Call of Duty: Black Ops Cold War 567% 607%
Hitman 3 880% 939%
Grand Theft Auto VI 960% 1024%
FIFA 21 280% 303%
Far Cry 6 990% 1055%
Genshin Impact 653% 699%
World of Warcraft: Shadowlands 980% 1045%
Watch Dogs Legion 627% 670%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 are very slightly better than the AMD Radeon HD 4750.

The GeForce GT 640 has a 172 MHz higher core clock speed and the same number of Texture Mapping Units as the Radeon HD 4750. This results in the GeForce GT 640 providing 5.5 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 than the Radeon HD 4750 and the same number of Render Output Units. This results in the GeForce GT 640 providing 2.7 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 Radeon HD 4750, 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 Radeon HD 4750.

The GeForce GT 640 has 1536 MB more video memory than the Radeon HD 4750, so is likely to be much better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The Radeon HD 4750 has 22.7 GB/sec greater memory bandwidth than the GeForce GT 640, which means that the memory performance of the Radeon HD 4750 is slightly better than the GeForce GT 640.

The GeForce GT 640 has 384 Shader Processing Units and the Radeon HD 4750 has 640. However, the actual shader performance of the GeForce GT 640 is 346 and the actual shader performance of the Radeon HD 4750 is 304. The GeForce GT 640 having 42 better shader performance is not particularly notable, as altogether the Radeon HD 4750 performs better when taking into account other relevant data.

The GeForce GT 640 transistor size technology is 12 nm (nanometers) smaller than the Radeon HD 4750. This means that the GeForce GT 640 is expected to run slightly cooler and achieve higher clock frequencies than the Radeon HD 4750. While they exhibit similar graphical performance, the GeForce GT 640 should consume less power than the Radeon HD 4750.

The GeForce GT 640 requires 65 Watts to run and the Radeon HD 4750 requires 75 Watts. We would recommend a PSU with at least 350 Watts for the GeForce GT 640 and a PSU with at least 500 Watts for the Radeon HD 4750. The Radeon HD 4750 requires 10 Watts more than the GeForce GT 640 to run. The difference is not significant enough for the Radeon HD 4750 to have a noticeably larger impact on your yearly electricity bills than the GeForce GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed902 MHzvs730 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2RV740 PRO
OC Potential Fair vs Fair
Driver Support Good vs -
Release Date05 Jun 2012vs09 Sep 2009
GPU LinkGD LinkGD Link

Resolution Performance

green tick vs -
green tick vs -
green tick vs -
green tick vs -
green tick vs -

GPU Memory

Memory2048 MBvs512 MB
Memory Speed891 MHzvs800 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeDDR3vsGDDR5
Memory Bandwidth28.5GB/secvs51.2GB/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 Units384vs640
Actual Shader Performance17%vs15%
Texture Mapping Units32vs32
Texture Rate28.9 GTexel/svs23.4 GTexel/s
Render Output Units16vs16
Pixel Rate14.4 GPixel/svs11.7 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections1vs0
DVI Connections1vs2
HDMI Connections1vs0
DisplayPort Connections-vs-

GPU Power Requirements

Max Power65 Wattsvs75 Watts
Recommended PSU350 Watts & 26 Ampsvs500 Watts & 26 Amps

GPU Features

Shader Model5.0vs4.1
Open GL4.5vs3.3
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHzvsIntel Core 2 Duo E8600 3.33GHz
Recommended RAM8 GBvs6 GB
Maximum Recommended Gaming Resolution1366x768vs1440x900

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 4750 is a fast-middle-class GPU based on the 40nm variant of the Terascale 1 architecture.
It was released quite some time after Radeon HD 4730 and stirs from a 40nm chip (instead of 55nm). It's therefore related to Radeon HD 4770 as it offers 640 Shader Processing Units, 32 TMUs and 16 ROPs on a 128-bit memory interface of fast GDDR5. However, the central unit runs at 750MHz in Radeon HD 4770 while, on Radeon HD 4730, it's clocked at 730MHz. The operating memory clock runs at 800MHz on both.
Radeon HD 4750 can be addressed as a power optimized Radeon HD 4770, since it only consumes 75 Watt, while the latter is expected to consume up to 80 Watt.
Therefore, it's still faster than Radeon HD 4830 and should offer similar performance to Radeon HD 4770.
Today's modern games, will run from low detail to high detail. Only DirectX 11 games aren't supported.
Recommended CPU
Possible GPU Upgrades
GPU Variants