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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 v3 Zotac 2GB Edition Radeon HD 4850 Golden Sample Edition
Red Dead Redemption 2 529% 422%
Cyberpunk 2077 765% 618%
Doom Eternal 441% 349%
Call of Duty: Modern Warfare 529% 422%
Dragon Ball Z Kakarot 288% 222%
Halo: Reach 100% 66%
Microsoft Flight Simulator 765% 618%
Star Wars: Jedi - Fallen Order 765% 618%
Grand Theft Auto VI 862% 698%
Need For Speed Heat 529% 422%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 4850 Golden Sample Edition are noticeably better than the Nvidia GeForce GT 640 v3 Zotac 2GB Edition.

The GT 640 has a 346 MHz higher core clock speed than the HD 4850, but the HD 4850 has 24 more Texture Mapping Units than the GT 640. As a result, the HD 4850 exhibits a 11.3 GTexel/s better Texture Fill Rate than the 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 GT 640 has a 346 MHz higher core clock speed than the HD 4850, but the HD 4850 has 8 more Render Output Units than the GT 640. As a result, the HD 4850 exhibits a 2.8 GPixel/s better Pixel Fill Rate than the GT 640. 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 HD 4850, 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 HD 4850 when running the latest games.

The GT 640 has 1536 MB more video memory than the HD 4850, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GT 640 also has superior memory performance overall.

The HD 4850 has 30.3 GB/sec greater memory bandwidth than the GT 640, which means that the memory performance of the HD 4850 is noticeably better than the GT 640.

The GeForce GT 640 v3 Zotac 2GB Edition has 384 Shader Processing Units and the Radeon HD 4850 Golden Sample Edition has 800. However, the actual shader performance of the GT 640 is 402 and the actual shader performance of the HD 4850 is 392. The GT 640 having 10 better shader performance is not particularly notable, as altogether the HD 4850 performs better when taking into account other relevant data.

The GT 640 transistor size technology is 27 nm (nanometers) smaller than the HD 4850. This means that the GT 640 is expected to run slightly cooler and achieve higher clock frequencies than the HD 4850.

The GeForce GT 640 v3 Zotac 2GB Edition requires 49 Watts to run but there is no entry for the Radeon HD 4850 Golden Sample Edition. We would recommend a PSU with at least 350 Watts for the GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1046 MHzvs700 MHz
Boost Clock-vs-
ArchitectureKepler GK208-400-A1R700 RV770 PRO
OC Potential Poor vs Poor
Driver Support Good vs Poor
Release Date29 May 2013vs01 Aug 2008
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
5.2
vs green tick
5.9
1920x1080
3.9
vs green tick
4.4
2560x1440
2.6
green tick vs green tick
2.6
3840x2160
1.8
green tick vs
1.7

GPU Memory

Memory2048 MBvs512 MB
Memory Speed1252 MHzvs1100 MHz
Memory Bus64 Bitvs256 Bit
Memory TypeGDDR5vsGDDR3
Memory Bandwidth40.1GB/secvs70.4GB/sec
L2 Cache 128 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 Units384vs800
Actual Shader Performance19%vs19%
Technology28nmvs55nm
Texture Mapping Units16vs40
Texture Rate16.7 GTexel/svs28 GTexel/s
Render Output Units8vs16
Pixel Rate8.4 GPixel/svs11.2 GPixel/s
Comparison

GPU Outputs

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

GPU Power Requirements

Max Power49 Watts-
Recommended PSU350 Watts & 26 Amps-

GPU Features

DirectX12.0vs10.1
Shader Model5.0vs4.1
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 Duo E8600 3.33GHz
Recommended RAM8 GBvs6 GB
Maximum Recommended Gaming Resolution1366x768vs1440x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GT 640 v3 Zotac 2GB Edition is a special edition of NVIDIA's Middle-Class GeForce GT 640 v3, created by Zotac.

Overclock: Central Unit
The Central Unit runs at the same speed.

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

Cooling Solution
The Cooling System has been replaced by Zotac's Silent Cooling Solution.

Performance
Without Overclocking Out of The Box, GeForce GT 640 v3 Zotac 2GB Edition is as fast as the reference GeForce GT 640 v3.
Radeon HD 4850 Golden Sample Edition is a special edition of the high-end Radeon HD 4850.
The new features include increases in the core and memory clocks that went from 625MHz to 700MHz and from 993MHz to 1100MHz, respectively. A new cooling system is also available.
The overclocking is significant and benchmarks indicate it's around 5% when compared to the reference Radeon HD 4850.
Recommended CPU
Possible GPU Upgrades
GPU Variants
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