GeForce GT 340 vs Radeon HD 4850 1GB

Intro

Compare those specifications to the Radeon HD 4850 1GB, which has a core clock frequency of 625 MHz and a GDDR4 memory speed of 993 MHz. It also makes use of a 256-bit memory bus, and uses a 55 nm design. It is comprised of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 41 Watts (59%)

Memory Bandwidth

The Radeon HD 4850 1GB should in theory perform just a bit faster than the GeForce GT 340 overall. (explain)

Radeon HD 4850 1GB		63552 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 9152 (17%)

Texel Rate

The Radeon HD 4850 1GB is quite a bit (approximately 42%) better at AF than the GeForce GT 340. (explain)

Radeon HD 4850 1GB		25000 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 7400 (42%)

Pixel Rate

The Radeon HD 4850 1GB will be much (approximately 127%) faster with regards to full screen anti-aliasing than the GeForce GT 340, and also able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 4850 1GB		10000 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 5600 (127%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.