Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 Radeon HD 3850 X3
Cyberpunk 2077 653% 552%
Assassins Creed: Valhalla 589% 496%
Call of Duty: Black Ops Cold War 567% 477%
FIFA 21 280% 229%
Grand Theft Auto VI 960% 817%
Hitman 3 880% 748%
Genshin Impact 653% 552%
Far Cry 6 990% 843%
World of Warcraft: Shadowlands 980% 834%
Watch Dogs Legion 627% 529%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 3850 X3 are very slightly better than the Nvidia GeForce GT 640.

The GeForce GT 640 has a 233 MHz higher core clock speed than the HD 3850, but the HD 3850 has 16 more Texture Mapping Units than the GeForce GT 640. As a result, the HD 3850 exhibits a 3.2 GTexel/s better Texture Fill Rate than the GeForce GT 640. 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 233 MHz higher core clock speed than the HD 3850, but the HD 3850 has 32 more Render Output Units than the GeForce GT 640. As a result, the HD 3850 exhibits a 17.7 GPixel/s better Pixel Fill Rate than the GeForce GT 640. 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 3850, 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 3850 when running the latest games.

The GeForce GT 640 has 512 MB more video memory than the HD 3850, so is likely to be much better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The HD 3850 has 134.7 GB/sec greater memory bandwidth than the GeForce GT 640, which means that the memory performance of the HD 3850 is massively better than the GeForce GT 640.

The GeForce GT 640 has 384 Shader Processing Units and the Radeon HD 3850 X3 has 960. However, the actual shader performance of the GeForce GT 640 is 346 and the actual shader performance of the HD 3850 is 642. The HD 3850 having 296 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 3850 delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GT 640.

The GeForce GT 640 transistor size technology is 27 nm (nanometers) smaller than the HD 3850. This means that the GeForce GT 640 is expected to run slightly cooler and achieve higher clock frequencies than the HD 3850.

The GeForce GT 640 requires 65 Watts to run and the Radeon HD 3850 X3 requires 145 Watts. We would recommend a PSU with at least 350 Watts for the GeForce GT 640. The HD 3850 requires 80 Watts more than the GeForce GT 640 to run. The difference is significant enough that the HD 3850 may have an adverse affect on your yearly electricity bills in comparison to the GeForce GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed902 MHzvs669 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2RV670 PRO
OC Potential Fair vs Fair
Driver Support Good vs -
Release Date05 Jun 2012vs10 Apr 2008
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

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

GPU Memory

Memory2048 MBvs1536 MB
Memory Speed891 MHzvs850 MHz
Memory Bus128 Bitvs768 Bit
Memory TypeDDR3vsGDDR3
Memory Bandwidth28.5GB/secvs163.2GB/sec
L2 Cache 256 KB green tick vs -
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs960
Actual Shader Performance17%vs31%
Technology28nmvs55nm
Texture Mapping Units32vs48
Texture Rate28.9 GTexel/svs32.1 GTexel/s
Render Output Units16vs48
Pixel Rate14.4 GPixel/svs32.1 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections1vs0
DVI Connections1vs4
HDMI Connections1vs0
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power65 Wattsvs145 Watts
Recommended PSU350 Watts & 26 Amps-

GPU Features

DirectX12.0vs10.1
Shader Model5.0vs4.1
Open GL4.5vs3.3
Open CL-vs-
Notebook GPUnono
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHzvsIntel Core 2 Duo E6850 3.0GHz
Recommended RAM8 GBvs6 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.

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 HD 3850 X3 (not Crossfire) is a triple-graphics solution of three Radeon HD 3850.
This combination, also known as Radeon HD 3850 Trinity, is expected to offer almost the same performance as Radeon HD 3850 3-Way-Crossfired while consuming slightly less power. However, and just like Crossfire, its performance also relies a lot on proper driver support.
Some of today's modern demanding games might be playable using the high preset but most will require reduced settings. However, DirectX 11 games aren't supported.
Recommended CPU
Possible GPU Upgrades
GPU Variants
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