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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 FireStream 9270
Cyberpunk 2077 653% 528%
Hitman 3 880% 717%
Assassins Creed: Valhalla 589% 474%
Call of Duty: Black Ops Cold War 567% 456%
FIFA 21 280% 217%
Grand Theft Auto VI 960% 783%
Far Cry 6 990% 808%
Genshin Impact 653% 528%
World of Warcraft: Shadowlands 980% 800%
Battlefield 6 880% 717%

In terms of overall gaming performance, the graphical capabilities of the AMD FireStream 9270 are noticeably better than the Nvidia GeForce GT 640.

The GeForce GT 640 has a 152 MHz higher core clock speed than the FireStream 9270, but the FireStream 9270 has 8 more Texture Mapping Units than the GeForce GT 640. As a result, the FireStream 9270 exhibits a 1.1 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 152 MHz higher core clock speed than the FireStream 9270 and the same number of Render Output Units. This results in the GeForce GT 640 providing 2.4 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 FireStream 9270, 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 FireStream 9270 when running the latest games.

The GeForce GT 640 and the FireStream 9270 have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The FireStream 9270 has 80.3 GB/sec greater memory bandwidth than the GeForce GT 640, which means that the memory performance of the FireStream 9270 is much better than the GeForce GT 640.

The GeForce GT 640 has 384 Shader Processing Units and the FireStream 9270 has 800. However, the actual shader performance of the GeForce GT 640 is 346 and the actual shader performance of the FireStream 9270 is 390. The FireStream 9270 having 44 better shader performance and an altogether better performance when taking into account other relevant data means that the FireStream 9270 delivers a significantly 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 FireStream 9270. This means that the GeForce GT 640 is expected to run slightly cooler and achieve higher clock frequencies than the FireStream 9270.

The GeForce GT 640 requires 65 Watts to run and the FireStream 9270 requires 160 Watts. We would recommend a PSU with at least 350 Watts for the GeForce GT 640 and a PSU with at least 600 Watts for the FireStream 9270. The FireStream 9270 requires 95 Watts more than the GeForce GT 640 to run. The difference is significant enough that the FireStream 9270 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 MHzvs750 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2RV770
OC Potential Fair vs Poor
Driver Support Good vs -
Release Date05 Jun 2012vs13 Nov 2008
GPU LinkGD LinkGD Link

Resolution Performance

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

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed891 MHzvs850 MHz
Memory Bus128 Bitvs256 Bit
Memory TypeDDR3vsGDDR5
Memory Bandwidth28.5GB/secvs108.8GB/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 Units384vs800
Actual Shader Performance17%vs19%
Texture Mapping Units32vs40
Texture Rate28.9 GTexel/svs30 GTexel/s
Render Output Units16vs16
Pixel Rate14.4 GPixel/svs12 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections1vs0
DVI Connections1vs1
HDMI Connections1vs0
DisplayPort Connections-vs-

GPU Power Requirements

Max Power65 Wattsvs160 Watts
Recommended PSU350 Watts & 26 Ampsvs600 Watts & 42 Amps

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHz-
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.

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.
The AMD FireStream 9270 is our next generation DP-FP product. With 2GB GDDR5 memory on board and single-precision performance of 1.2 TFLOPS and double precision performance of 240 GFLOPS, the FireStream 9270 is ideal for the most demanding compute-intensive, data-parallel tasks.
Recommended CPU
Possible GPU Upgrades
GPU Variants