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Gaming Performance Comparison

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 1GB DDR3 are massively better than the Intel HD Graphics 4600 Desktop.

The GT 640 has a 500 MHz higher core clock speed and 28 more Texture Mapping Units than the Graphics 4600. This results in the GT 640 providing 27.2 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 GT 640 has a 500 MHz higher core clock speed and 14 more Render Output Units than the Graphics 4600. This results in the GT 640 providing 13.6 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 Graphics 4600 was released over a year more recently than the GT 640, and so the Graphics 4600 is likely to have better driver support, meaning it will be more optimized for running the latest games.

The GT 640 has 1024 MB video memory, but the Graphics 4600 does not have an entry, so the two GPUs cannot be reliably compared in this area.

The HD Graphics 4600 Desktop has 80 Shader Processing Units and the GeForce GT 640 1GB DDR3 has 384. However, the actual shader performance of the Graphics 4600 is 157 and the actual shader performance of the GT 640 is 346. The GT 640 having 189 better shader performance and an altogether better performance when taking into account other relevant data means that the GT 640 delivers a noticeably smoother and more efficient experience when processing graphical data than the Graphics 4600.

The Graphics 4600 transistor size technology is 6 nm (nanometers) smaller than the GT 640. This means that the Graphics 4600 is expected to run very slightly cooler and achieve higher clock frequencies than the GT 640.

The GeForce GT 640 1GB DDR3 requires 50 Watts to run but there is no entry for the Graphics 4600. We would recommend a PSU with at least 400 Watts for the GT 640, but we do not have a recommended PSU wattage for the Graphics 4600.

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GPU Core Details

Core Speed400 MHzvs900 MHz
ArchitectureHaswellKepler GK107
Notebook GPUnono
Release Date01 Jun 201323 Apr 2012
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - green tick vs green tick -
1600x900 - vs green tick
1920x1080 - vs green tick
2560x1440 - vs green tick
3840x2160 - vs green tick

GPU Memory

Memory-vs1024 MB
Memory Speed800 MHzvs891 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeDDR3vsDDR3
Memory Bandwidth25.6GB/secvs28.5GB/sec
L2 Cache - vs green tick 256 KB

GPU Display

Shader Processing Units80vs384
Actual Shader Performance157vs346
Texture Mapping Units4vs32
Texture Rate1.6 GTexel/svs28.8 GTexel/s
Render Output Units2vs16
Pixel Rate0.8 GPixel/svs14.4 GPixel/s

GPU Display Tech

Shader Model5.0vs5.0
Open GL4.2vs4.2
Max Resolution (WxH)2560x1600vs4096x2160
VGA Connections0vs1
DVI Connections0vs1
HDMI Connections0vs1

GPU Power Requirements

Max Power-50 Watts

GPU Supporting Hardware

Recommended RAM-6 GB
Recommended Screen Size-1366x768
Recommended PSU-400 Watts & 20 Amps

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewIntel HD Graphics 4600 Desktop is the successor to Intel HD 4000 Desktop that's featured in the Haswell based desktop CPUs.
It features 20 Execution Units (80 Shader Processing Units) and its central-unit speed will range between 400MHz and 1250MHz (Turbo Boost) and that the fastest memory supported is DDR3-1600 meaning its memory-clock will operate at 800MHz, at the most.
Benchmarks indicate its performance is up to 25% better than previous Intel HD 4000. However, only Iris Graphics offer performance good enough to play all modern demanding games, some even with extremely fluent frame rates.
GeForce GT 640 1GB DDR3 is a fast middle-class GPU part of the GeForce 600 Series released by NVIDIA in 2012.
It's based on the Kepler GK107 architecture and therefore not related to any of the 500 Series GPUs.
The Kepler architecture allows more Pipelines but the Fermi Pipelines (used on the 400 & 500 Series) are clocked twice as fast as the Kepler architecture. Therefore, don't let the large amount of Pipelines fool you, as the 384 Pipelines are equivalent to 192 Pipelines, of the Fermi architecture.
The memory bandwidth is its greatest hindrance. A 2GB version is also available but there will be no benefit in buying one, since the maximum amount of memory this GPU can process is actually less than 1GB.
The Result is a pretty solid GPU, with a memory bottleneck that should be able to play very demanding games like Metro 2033 at medium or high settings, while less demanding games will run on the highest settings.
Recommended CPU-AMD FX-4300
Intel Core 2 Quad Q9550S 2.83GHz
Intel Core 2 Quad Q9550 2.83GHz
AMD Phenom II X4 960T
Intel Core i3-4360T 3.2GHz
Possible GPU Upgrades--
GPU Variants-GeForce GT 640 Zotac 2GB Edition
GeForce GT 640 MSI 2GB DDR3 Edition
GeForce GT 640 Gainward 2GB DDR3 Edition
GeForce GT 640 EVGA Single Slot Edition
GeForce GT 640 Asus 2GB DDR3 Edition
GeForce GT 640 Sparkle 2GB OC LP Edition
GeForce GT 640 MSI 4GB DDR3 Edition
GeForce GT 640 Palit 2GB DDR3 Edition
GeForce GT 640 EVGA Superclocked 2GB Edition
GeForce GT 640 Galaxy GC 1GB Edition
GeForce GT 640 2GB Gigabyte OC Edition