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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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|Recommended RAM||-||6 GB|
|Recommended Screen Size||-||1366x768|
|Recommended PSU||-||400 Watts & 20 Amps|
|Mini Review||Intel 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.