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GeForce GTX 650 vs Radeon HD 5870


Intro

The GeForce GTX 650 comes with a core clock frequency of 1058 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It is comprised of 384 SPUs, 32 TAUs, and 16 ROPs.

Compare that to the Radeon HD 5870, which uses a 40 nm design. AMD has set the core frequency at 850 MHz. The GDDR5 RAM runs at a speed of 1200 MHz on this specific card. It features 1600(320x5) SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
Radeon HD 5870 188 Watts
Difference: 124 Watts (194%)

Memory Bandwidth

Performance-wise, the Radeon HD 5870 should in theory be a lot superior to the GeForce GTX 650 overall. (explain)

Radeon HD 5870 153600 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 73600 (92%)

Texel Rate

The Radeon HD 5870 is a lot (more or less 101%) better at anisotropic filtering than the GeForce GTX 650. (explain)

Radeon HD 5870 68000 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 34144 (101%)

Pixel Rate

The Radeon HD 5870 should be quite a bit (more or less 61%) better at anti-aliasing than the GeForce GTX 650, and will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 5870 27200 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 10272 (61%)

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

GeForce GTX 650

Radeon HD 5870

Specifications

Display Specifications

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Model GeForce GTX 650 Radeon HD 5870
Manufacturer nVidia AMD
Year September 2012 September 23, 2009
Code Name GK107 Cypress XT
Memory 1024 MB 1024 MB
Core Speed 1058 MHz 850 MHz
Memory Speed 5000 MHz 4800 MHz
Power (Max TDP) 64 watts 188 watts
Bandwidth 80000 MB/sec 153600 MB/sec
Texel Rate 33856 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 384 1600(320x5)
Texture Mapping Units 32 80
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 1300 million 2154 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 3.2

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

GeForce GTX 650

Radeon HD 5870

Comments

2 Responses to “GeForce GTX 650 vs Radeon HD 5870”
Søren says:

Why is your GTX 650 listed as having 2048mb GDDR5 rams when it only has 1024? that makes no sense to me and this is the only place i've found that suggesd this.

MikEms says:

You are correct, slight oversight, will be fixed.
There actually are 2GB versions available.
http://www.gainward.com/main/vgapro.php?id=894&lang=en
https://www.amazon.com/PNY-GeForce-GTX650-VCGGTX650XPB-Graphic/dp/B009T0FDR2

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