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Gaming Performance Comparison

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 144 Shaders are significantly better than the Intel HD Graphics 4600 Desktop.

The GT 640 has a 320 MHz higher core clock speed and 20 more Texture Mapping Units than the Graphics 4600. This results in the GT 640 providing 15.7 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 320 MHz higher core clock speed and 22 more Render Output Units than the Graphics 4600. This results in the GT 640 providing 16.5 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 3072 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 640 144 Shaders has 144. However, the actual shader performance of the Graphics 4600 is 157 and the actual shader performance of the GT 640 is 207. The GT 640 having 50 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 18 nm (nanometers) smaller than the GT 640. This means that the Graphics 4600 is expected to run slightly cooler and achieve higher clock frequencies than the GT 640.

The GeForce GT 640 144 Shaders requires 75 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 MHzvs720 MHz
ArchitectureHaswellFermi GF116
Notebook GPUnono
Release Date01 Jun 201323 Apr 2012
GPU LinkGD LinkGD Link

GPU Memory

Memory-vs3072 MB
Memory Speed800 MHzvs900 MHz
Memory Bus128 Bitvs192 Bit
Memory TypeDDR3vsDDR3
Memory Bandwidth25.6GB/secvs43.2GB/sec
L2 Cache - vs green tick 384 KB

GPU Display

Shader Processing Units80vs144
Actual Shader Performance157vs207
Texture Mapping Units4vs24
Texture Rate1.6 GTexel/svs17.3 GTexel/s
Render Output Units2vs24
Pixel Rate0.8 GPixel/svs17.3 GPixel/s

GPU Display Tech

Shader Model5.0vs5.0
Open GL4.2vs4.2
Max Resolution (WxH)2560x1600vs2560x1600
VGA Connections0vs0
DVI Connections0vs2
HDMI Connections0vs0

GPU Power Requirements

Max Power-75 Watts

GPU Supporting Hardware

Recommended RAM-6 GB
Recommended Screen Size-1440x900
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 640 144 Shaders (OEM) is a fast-middle-class GFX, based on the 40nm Fermi architecture.
It's based on the Fermi GF116 Core and offers 144 Shader Processing Units, 24 TMUs and 24 ROPs, on a 192-bit memory interface of DDR3. While the central unit runs at 720MHz, the memory clock operates at 900MHz.
It's therefore a renamed GeForce GT 545 DDR3 and performs like it.
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--