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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 v2 Radeon HD 7870 PCS+ Vortex II Edition
Cyberpunk 2077 606% 103%
Assassins Creed: Valhalla 546% 86%
Call of Duty: Black Ops Cold War 525% 80%
Watch Dogs Legion 581% 96%
FIFA 21 256% 2%
Microsoft Flight Simulator 525% 80%
Godfall 1047% 230%
Grand Theft Auto VI 894% 186%
World of Warcraft: Shadowlands 913% 191%
Genshin Impact 606% 103%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7870 PCS+ Vortex II Edition are massively better than the Nvidia GeForce GT 640 v2.

The HD 7870 has a 248 MHz higher core clock speed and 48 more Texture Mapping Units than the GT 640. This results in the HD 7870 providing 63.1 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The HD 7870 has a 248 MHz higher core clock speed and 16 more Render Output Units than the GT 640. This results in the HD 7870 providing 22.4 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 HD 7870 was released less than a year after the GT 640, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The HD 7870 has 1024 MB more video memory than the GT 640, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the HD 7870 also has superior memory performance overall.

The HD 7870 has 120 GB/sec greater memory bandwidth than the GT 640, which means that the memory performance of the HD 7870 is massively better than the GT 640.

The GeForce GT 640 v2 has 384 Shader Processing Units and the Radeon HD 7870 PCS+ Vortex II Edition has 1280. However, the actual shader performance of the GT 640 is 346 and the actual shader performance of the HD 7870 is 1251. The HD 7870 having 905 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 7870 delivers a massively smoother and more efficient experience when processing graphical data than the GT 640.

The GeForce GT 640 v2 requires 49 Watts to run but there is no entry for the Radeon HD 7870 PCS+ Vortex II Edition. We would recommend a PSU with at least 300 Watts for the GT 640 and a PSU with at least 500 Watts for the HD 7870. The HD 7870 has been recommended a PSU with 200 Watts more than the GT 640. The difference is significant enough that the HD 7870 may have an adverse affect on your yearly electricity bills in comparison to the GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed902 MHzvs1150 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2GCN 1.0 Pitcairn XT
OC Potential Fair vs Poor
Driver Support Good vs Good
Release Date05 Jun 2012vs01 Sep 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
6.6
green tick vs -
1600x900
5.1
vs green tick
9.5
1920x1080
3.7
vs green tick
7.5
2560x1440
2.5
vs green tick
5.5
3840x2160
1.8
vs green tick
3.9

GPU Memory

Memory1024 MBvs2048 MB
Memory Speed1250 MHzvs1250 MHz
Memory Bus64 Bitvs256 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth40GB/secvs160GB/sec
L2 Cache 256 KB vs green tick 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs1280
Actual Shader Performance17%vs60%
Technology28nmvs28nm
Texture Mapping Units32vs80
Texture Rate28.9 GTexel/svs92 GTexel/s
Render Output Units16vs32
Pixel Rate14.4 GPixel/svs36.8 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections1vs0
DVI Connections1vs2
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power49 Watts-
Recommended PSU300 Watts & 22 Ampsvs500 Watts

GPU Features

DirectX12.0vs12.0
Shader Model5.0vs5.0
Open GL4.5vs4.4
Open CL-vs-
Notebook GPUnono
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHzvsIntel Core i5-3570K 3.4GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GT 640 v2 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 1GB frame buffer of fast GDDR5, through a 64-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 1250MHz.

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 49W, it requires at least a 300W 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 v2.
Radeon HD 7870 PCS+ Vortex II Edition is a special edition of Radeon HD 7870.
This is one of today's most powerful editions of the reference as it features increases in both the core and memory clocks that went from 1000MHz to 1150MHz and from 1200MHz to 1250MHz.
Benchmarks indicate the performance boost is quite extreme and around 8% when compared to the reference Radeon HD 7870.
Recommended CPU
Possible GPU Upgrades
GPU Variants
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