NVIDIA GeForce GT 540M vs NVIDIA GeForce GT 520MX
NVIDIA GeForce GT 540M► remove
The NVIDIA GeForce GT 540M is a fast middle class graphics card for laptops. It is based on the same chip as the GeForce GT 435M but with slightly higher clock speeds. Furthermore, it supports GDDR5 and 900MHz DDR3 graphics memory. Unfortunately, no models have utilized GDDR5 due to the increase in power consumption and higher prices compared to DDR3 VRAM.
The GT 540M is based on the same GF108 architecture as the older GT 435M. The GF108 stems from the GF100 (Fermi) DirectX 10 architecture. However, it is optimized for the consumer end (gaming) and stripped down to save power. More information on the architecture can be found on our GeForce GT 435M page.
Paired with a fast CPU, demanding games of 2010 should run fluently in medium to high details and SXGA (1280x1024) resolution. In our tests, for example, Call of Duty: Black Ops and StarCraft 2 ran fluently in high details and 1360x768. More gaming benchmarks can be found below. Demanding games released in 2011 like Anno 2070 or Skyrim will only run fluent in low to medium detail settings.
A novelty of the GF104/106/108 chips is the support for Bitstream HD Audio (Blu-Ray) output via HDMI. Alike the Radeon HD 5730, the GT 540M can transfer Dolby True HD and DTS-HD bitstream without quality loss to a HiFi receiver.
The GT 540M offers PureVideo HD technology for video decoding using the GPU. The integrated Video Processor 4 (VP4) supports feature set C and therefore the GPU is able to fully decode MPEG-1, MPEG-2, MPEG-4 Part 2 (MPEG-4 ASP - e.g., DivX or Xvid), VC-1/WMV9, and H.264 (VLD, IDCT, Motion Compensation, and Deblocking). Furthermore, the GPU is able to decode two 1080p streams simultaneously (e.g. for Blu-Ray Picture-in-Picture).
Through CUDA, OpenCL and DirectCompute 2.1 support, the GeForce GT 540M can be of help in general calculations. For example, the stream processor can encode videos considerably faster than can a modern CPU. Furthermore, physics calculations can be done by the GPU using PhysX (supported by Mafia 2 and Metro 2033). However, the GPU is not fast enough to calculate PhysX high detail game settings.
Following the current 3D trend, the 540M supports 3D Vision. It enables the laptop to send 3D content (3D games, 3D Web Streaming, 3D photos, 3D Blu-Rays) to a built-in 3D-enabled screen or an external 3D TV if supported by the manufacturer. This feature is disabled if the notebook includes Optimus.
The power consumption of the GeForce GT 540M should be similar to the GeForce GT 435M or Radeon HD 5730 and is therefore suited for 15" or larger laptops. Without load, the chip is clocked approximately at 50/101/137 MHz (chip/shader/memory) in 2D mode and 202/405/324 in 3D mode to save power. Furthermore, the 500M series supports Optimus to automatically switch between the integrated graphics card from Intel and the Nvidia GPU. The implementation of the Nvidia graphics switching technology is dependent on the laptop manufacturer.
NVIDIA GeForce GT 520MX► remove
The NVIDIA GeForce GT 520MX is an entry level dedicated laptop graphics card presented in 2011. It is based on the GF119 like the GT 520M, but features a higher core and shader clock rate. Using DDR3, the 64 Bit memory bus may become a bottleneck of the graphics card.
The GF119 offers 48 ALUs, 8 texture units and a 64 Bit memory interface for DDR3-VRAM. Therefore, it is similar to a half GF108 (GeForce GT 540M) but already manufactured with optimized transistors. As a difference the amount of raster-operation-processors (ROP) stayed the same counting 4. The GF119 is the smalles chip of the Fermi generation and is used for low end laptops.
As an entry level card, the GT 520MX has to compete against the Intel HD Graphics 3000 in the current Sandy Bridge processors. Due to the higher clock speeds, the MX should be faster than the GT 520M which was only slightly faster than the HD 3000 but clearly still beyond the faster GT 525M. Therefore demanding games like Crysis 2 or Mafia 2 run only in lowest detail and resolutions fluently. Less demanding games lik Fifa 11 or Sims 3 should be playable even in high detail settings.
As the other 500M series chips, the 520MX supports Bitstream HD Audio (Blu-Ray) output via HDMI. That means the card is able to transfer Dolby True HD and DTS-HD bitstream-wise without quality loss to a HiFi receiver.
The GT520MX offers the PureVideo HD technology for video decoding. The included Video Processor 5 (VP5) supports feature set D and therefore the GPU is able to fully decode MPEG-1, MPEG-2, MPEG-4 Part 2 (MPEG-4 ASP - e.g., DivX or Xvid), VC-1/WMV9, and H.264 (VLD, IDCT, Motion Compensation, and Deblocking). Compared to the older VP4, the VP5 offers faster decodes at lower power, HD-to-SD transcodes and 4K x 4K resolution H.264 decode support.
Furthermore, the GPU is able to decode two 1080p streams simultaneously (e.g. for Blu-Ray Picture-in-Picture).
Through CUDA, OpenCL, and DirectCompute 2.1 support, the GeForce GT 520MX can be of help in general calculations. For example, the stream processor can considerably faster encode videos than a fast CPU can. Furthermore, physics calculations can be theoretically done by the GPU using PhysX (e.g. supported by Mafia 2 or Metro 2033) but the performance wont be sufficient for this.
|NVIDIA GeForce GT 540M||NVIDIA GeForce GT 520MX|
|GeForce GT 500M Series|
|96 -||48 -|
|Core||672 MHz||900 MHz|
|Shader||1344 MHz||1800 MHz|
|Memory||900 MHz||900 MHz|
|Bus||128 Bit||64 Bit|
|Max. Memory||1536 MB||1024 MB|
|DirectX||DirectX 11, 5.0||DirectX 11, 5.0|
|Technology||40 nm||40 nm|
|Features||Optimus Support, PureVideo HD VP4, 3D Vision, 3DTV Play, Bitstream HD Audio, CUDA, DirectCompute, OpenCL, OpenGL 4.0, DirectX 11||Verde Drivers, CUDA, Optimus, DirectCompute, OpenCL, DirectX11, OpenGL 4.1|