Select any two GPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 Gigabyte OC 2GB Edition GeForce 9800 GT
Red Dead Redemption 2 560% 558%
Call of Duty: Modern Warfare 560% 558%
Zombieland: Double Tap - Road Trip 517% 515%
Cyberpunk 2077 807% 805%
Microsoft Flight Simulator 807% 805%
Borderlands 3 598% 595%
FIFA 20 252% 251%
The Outer Worlds 505% 503%
eFootball PES 2020 351% 349%
Ghost Recon Breakpoint 900% 897%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 9800 GT are marginally better than the Nvidia GeForce GT 640 Gigabyte OC 2GB Edition.

The GT 640 has a 450 MHz higher core clock speed than the GeForce 9800 GT, but both GPUs exhibit the same Texture Fill Rate. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GT 640 has a 450 MHz higher core clock speed than the GeForce 9800 GT and the same number of Render Output Units. This results in the GT 640 providing 7.2 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 GT 640 was released over three years more recently than the GeForce 9800 GT, and so the GT 640 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce 9800 GT when running the latest games.

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

The GeForce 9800 GT has 28.8 GB/sec greater memory bandwidth than the GT 640, which means that the memory performance of the GeForce 9800 GT is slightly better than the GT 640.

The GeForce GT 640 Gigabyte OC 2GB Edition has 384 Shader Processing Units and the GeForce 9800 GT has 112. However, the actual shader performance of the GT 640 is 403 and the actual shader performance of the GeForce 9800 GT is 168. The GT 640 having 235 better shader performance is not particularly notable, as altogether the GeForce 9800 GT performs better when taking into account other relevant data.

The GT 640 transistor size technology is 37 nm (nanometers) smaller than the GeForce 9800 GT. This means that the GT 640 is expected to run much cooler and achieve higher clock frequencies than the GeForce 9800 GT. While they exhibit similar graphical performance, the GT 640 should consume less power than the GeForce 9800 GT.

The GeForce GT 640 Gigabyte OC 2GB Edition requires 65 Watts to run and the GeForce 9800 GT requires 105 Watts. We would recommend a PSU with at least 350 Watts for the GT 640 and a PSU with at least 400 Watts for the GeForce 9800 GT. The GeForce 9800 GT requires 40 Watts more than the GT 640 to run. The difference is significant enough that the GeForce 9800 GT may have a slight adverse affect on your yearly electricity bills in comparison to the GT 640.

GPU Architecture

Core Speed1050 MHzvs600 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2Tesla G92-270-A2
OC Potential Poor vs Fair
Driver Support Good vs Poor
Release Date05 Jun 2012vs21 Jul 2008
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - vs green tick
vs green tick
green tick vs green tick
green tick vs
green tick vs -

GPU Memory

Memory2048 MBvs512 MB
Memory Speed900 MHzvs900 MHz
Memory Bus128 Bitvs256 Bit
Memory TypeDDR3vsGDDR3
Memory Bandwidth28.8GB/secvs57.6GB/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%

GPU Display

Shader Processing Units384vs112
Actual Shader Performance19%vs8%
Texture Mapping Units32vs56
Texture Rate33.6 GTexel/svs33.6 GTexel/s
Render Output Units16vs16
Pixel Rate16.8 GPixel/svs9.6 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections1vs0
DVI Connections2vs2
HDMI Connections1vs0
DisplayPort Connections-vs-

GPU Power Requirements

Max Power65 Wattsvs105 Watts
Recommended PSU350 Watts & 26 Ampsvs400 Watts & 29 Amps

GPU Features

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

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 Gigabyte OC 2GB Edition is a special edition of NVIDIA's Middle-Class GeForce GT 640, created by Gigabyte.

Overclock: Central Unit
The Central Unit now runs at 1050MHz, instead of 902MHz.

Overclock: Memory Clock
The Operating Memory Clock and the Frame Buffer remain the same.

Cooling Solution
The Cooling System remains the same.

Benchmarks indicate a 8% performance over the reference GeForce GT 640.
GeForce 9800 GT is a High-End Graphics Card based on the first revision of the Tesla Architecture.

Tesla was NVIDIA's First Unified Shader Architecture.

It equips a GPU Codenamed G92-270-A2 which has 7 Stream Multiprocessors activated and thus offers 112 Shader Processing Units, 56 TMUs and 16 ROPs. The Central Unit is clocked at 600MHz.

The GPU accesses a 512MB frame buffer of GDDR3, through a 256-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 900MHz.

DirectX 10.0 Support (10.0 Hardware Default) and support for SLI, NVIDIA PureVideo HD Technology, Dual-stream Hardware Acceleration, PhysX, CUDA, HybridPower and other technologies.

Cooling Solution
The Cooling Solution consists of a Single-Fan.

Power Consumption
With a rated board TDP of 105W, it requires at least a 400W PSU and it requires at least one 6-pin available connectors.

GeForce 9800 GT is a direct re-brand of GeForce 8800 GT.
Gaming benchmarks put its performance somewhat below a Radeon HD 4770, meaning it is much faster than Radeon HD 3870.
Recommended CPU
Possible GPU Upgrades
GPU Variants




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