Radeon HD 4670 512MB vs Radeon R9 M395X

Intro

Compare those specifications to the Radeon R9 M395X, which features a clock speed of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
Radeon R9 M395X		125 Watts
	Difference: 55 Watts (79%)

Memory Bandwidth

The Radeon R9 M395X should theoretically be a lot faster than the Radeon HD 4670 512MB overall. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 128000 (400%)

Texel Rate

The Radeon R9 M395X will be quite a bit (about 286%) better at anisotropic filtering than the Radeon HD 4670 512MB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 68544 (286%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 M395X is the winner, and very much so. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 17136 (286%)

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: Bandwidth is the max amount of information (in units of MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.