Select any two GPUs for comparison
VS

Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 Radeon HD 6690D2
Cyberpunk 2077 653% 905%
Assassins Creed: Valhalla 589% 819%
Call of Duty: Black Ops Cold War 567% 790%
FIFA 21 280% 407%
Grand Theft Auto VI 960% 1315%
Hitman 3 880% 1208%
Genshin Impact 653% 905%
Far Cry 6 990% 1355%
World of Warcraft: Shadowlands 980% 1341%
Watch Dogs Legion 627% 870%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 are significantly better than the AMD Radeon HD 6690D2.

The Radeon HD 6690D2 has no core clock speed set, so any comparison between Texture and Pixel Fill Rates is not currently possible.

The GeForce GT 640 was released over three years more recently than the Radeon HD 6690D2, 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 Radeon HD 6690D2 when running the latest games.

The GeForce GT 640 has 2048 MB video memory, but the Radeon HD 6690D2 does not have an entry, so the two GPUs cannot be reliably compared in this area.

The GeForce GT 640 has 384 Shader Processing Units but the Radeon HD 6690D2 does not have an entry, so the two GPUs cannot be reliably compared in this area.

The GeForce GT 640 requires 65 Watts to run but there is no entry for the Radeon HD 6690D2. We would recommend a PSU with at least 350 Watts for the GeForce GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed902 MHzvs-
Boost Clock-vs-
ArchitectureKepler GK107-300-A2-
OC Potential Fair vs -
Driver Support Good vs -
Release Date05 Jun 2012vs30 Nov -0001
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 MBvs-
Memory Speed891 MHzvs-
Memory Bus128 Bitvs-
Memory TypeDDR3vs-
Memory Bandwidth28.5GB/secvs-
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 Units384vs-
Actual Shader Performance17%vs-
Technology28nmvs-
Texture Mapping Units32vs-
Texture Rate28.9 GTexel/svs-
Render Output Units16vs-
Pixel Rate14.4 GPixel/svs-
Comparison

GPU Outputs

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

GPU Power Requirements

Max Power65 Watts-
Recommended PSU350 Watts & 26 Amps-

GPU Features

DirectX12.0vs-
Shader Model5.0vs5.0
Open GL4.5vs4.1
Open CL-vs-
Notebook GPUnono
SLI/Crossfirenovsno
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHz-
Recommended RAM8 GB-
Maximum Recommended Gaming Resolution1366x768-

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 6690D2 is a combination of a Radeon 6550D (integrated graphics) with a Radeon HD 6670 (dedicated).
This combination is called Asymmetric CrossFire and can also lead to Micro Stuttering.
We do not know much about this GPU at the moment but the performance should be around 7% better than a Radeon HD 6670 performing by itself but in some cases it might be worse.
Recommended CPU
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Possible GPU Upgrades
-
GPU Variants
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