Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 GeForce 9800 GTX
Cyberpunk 2077 653% 519%
Hitman 3 880% 705%
Assassins Creed: Valhalla 589% 466%
Call of Duty: Black Ops Cold War 567% 448%
FIFA 21 280% 212%
Grand Theft Auto VI 960% 771%
Far Cry 6 990% 796%
Genshin Impact 653% 519%
Battlefield 6 880% 705%
Resident Evil 8 653% 519%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 9800 GTX are noticeably better than the Nvidia GeForce GT 640.

The GeForce GT 640 has a 227 MHz higher core clock speed than the GeForce 9800 GTX, but the GeForce 9800 GTX has 32 more Texture Mapping Units than the GeForce GT 640. As a result, the GeForce 9800 GTX exhibits a 14.3 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 227 MHz higher core clock speed than the GeForce 9800 GTX and the same number of Render Output Units. This results in the GeForce GT 640 providing 3.6 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 GeForce GT 640 was released over three years more recently than the GeForce 9800 GTX, 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 GeForce 9800 GTX when running the latest games.

The GeForce GT 640 has 1536 MB more video memory than the GeForce 9800 GTX, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the GeForce 9800 GTX has superior memory performance.

The GeForce 9800 GTX has 41.9 GB/sec greater memory bandwidth than the GeForce GT 640, which means that the memory performance of the GeForce 9800 GTX is noticeably better than the GeForce GT 640.

The GeForce GT 640 has 384 Shader Processing Units and the GeForce 9800 GTX has 128. However, the actual shader performance of the GeForce GT 640 is 346 and the actual shader performance of the GeForce 9800 GTX is 216. The GeForce GT 640 having 130 better shader performance is not particularly notable, as altogether the GeForce 9800 GTX performs better when taking into account other relevant data.

The GeForce GT 640 transistor size technology is 37 nm (nanometers) smaller than the GeForce 9800 GTX. This means that the GeForce GT 640 is expected to run much cooler and achieve higher clock frequencies than the GeForce 9800 GTX.

The GeForce GT 640 requires 65 Watts to run and the GeForce 9800 GTX requires 140 Watts. We would recommend a PSU with at least 350 Watts for the GeForce GT 640 and a PSU with at least 450 Watts for the GeForce 9800 GTX. The GeForce 9800 GTX requires 75 Watts more than the GeForce GT 640 to run. The difference is significant enough that the GeForce 9800 GTX 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 MHzvs675 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2Tesla G92-420-A2
OC Potential Fair vs Poor
Driver Support Good vs Poor
Release Date05 Jun 2012vs28 Mar 2008
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
6.6
vs green tick
7.5
1600x900
5.1
vs green tick
5.6
1920x1080
3.5
vs green tick
4.1
2560x1440
2.5
green tick vs
2.4
3840x2160
1.7
green tick vs -

GPU Memory

Memory2048 MBvs512 MB
Memory Speed891 MHzvs1100 MHz
Memory Bus128 Bitvs256 Bit
Memory TypeDDR3vsGDDR3
Memory Bandwidth28.5GB/secvs70.4GB/sec
L2 Cache 256 KB green tick vs 0 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs128
Actual Shader Performance17%vs10%
Technology28nmvs65nm
Texture Mapping Units32vs64
Texture Rate28.9 GTexel/svs43.2 GTexel/s
Render Output Units16vs16
Pixel Rate14.4 GPixel/svs10.8 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections1vs0
DVI Connections1vs2
HDMI Connections1vs0
DisplayPort Connections-vs0
Comparison

GPU Power Requirements

Max Power65 Wattsvs140 Watts
Recommended PSU350 Watts & 26 Ampsvs450 Watts & 30 Amps

GPU Features

DirectX12.0vs10.0
Shader Model5.0vs3.0
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 Quad Q6600 2.4GHz
Recommended RAM8 GBvs4 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.
Overview
GeForce 9800 GTX is a High-End Graphics Card based on the Tesla Architecture.

Architecture
Tesla was NVIDIA's First Unified Shader Architecture.

GPU
It equips a GPU Codenamed G92-420-A2 which has 8 Stream Multiprocessors activated and thus offers 128 Shader Processing Units, 64 TMUs and 16 ROPs. The Central Unit is clocked at 675MHz.

Memory: Speed
The GPU is equipped with GDDR3 and Accesses the Frame Buffer through a 256-bit Memory Interface. The Memory Clock Operates at 1100MHz.

Memory: Frame Buffer
The GPU can fill up a Memory Pool of up to 512MB. Therefore, Gaming above 720p will be a problem.

Power Consumption
With a rated board TDP of 140W, it requires at least a 450W PSU and it requires at least two 6-pin available connectors.

Performance
GeForce 9800 GTX offers around 10% better performance than GeForce 9800 GT.
Recommended CPU
Possible GPU Upgrades
GPU Variants