Radeon HD 6670 (OEM) 1GB vs Radeon HD 7870 XT

Intro

Compare all that to the Radeon HD 7870 XT, which makes use of a 28 nm design. AMD has set the core frequency at 925 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this particular model. It features 1536 SPUs as well as 96 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
Radeon HD 7870 XT		185 Watts
	Difference: 122 Watts (194%)

Memory Bandwidth

The Radeon HD 7870 XT should theoretically perform much faster than the Radeon HD 6670 (OEM) 1GB overall. (explain)

Radeon HD 7870 XT		192000 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 128000 (200%)

Texel Rate

The Radeon HD 7870 XT will be much (approximately 363%) faster with regards to texture filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon HD 7870 XT		88800 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 69600 (363%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7870 XT is the winner, by a large margin. (explain)

Radeon HD 7870 XT		29600 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 23200 (363%)

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 data (in units of MB per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics 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 the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.