GeForce GT 640 DDR3 vs Radeon RX Vega 64

Intro

Compare all that to the Radeon RX Vega 64, which has GPU core speed of 1247 MHz, and 8192 MB of HBM2 memory set to run at 1890 MHz through a 2048-bit bus. It also features 4096 SPUs, 256 TAUs, and 64 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX Vega 64		21986 points
GeForce GT 640 DDR3		1560 points
	Difference: 20426 (1309%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon RX Vega 64		295 Watts
	Difference: 230 Watts (354%)

Memory Bandwidth

As far as performance goes, the Radeon RX Vega 64 should in theory be a lot superior to the GeForce GT 640 DDR3 in general. (explain)

Radeon RX Vega 64		495411 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 438387 (769%)

Texel Rate

The Radeon RX Vega 64 is much (approximately 1008%) faster with regards to anisotropic filtering than the GeForce GT 640 DDR3. (explain)

Radeon RX Vega 64		319232 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 290432 (1008%)

Pixel Rate

The Radeon RX Vega 64 is quite a bit (approximately 454%) more effective at AA than the GeForce GT 640 DDR3, and also will be able to handle higher resolutions without losing too much performance. (explain)

Radeon RX Vega 64		79808 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 65408 (454%)

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 max amount of information (in units of megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.