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GeForce GTX 650 vs Radeon HD 7770


The GeForce GTX 650 uses a 28 nm design. nVidia has set the core speed at 1058 MHz. The GDDR5 memory works at a speed of 1250 MHz on this particular model. It features 384 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 7770, which has GPU core speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
Radeon HD 7770 80 Watts
Difference: 16 Watts (25%)

Memory Bandwidth

The GeForce GTX 650 should in theory perform just a bit faster than the Radeon HD 7770 overall. (explain)

GeForce GTX 650 80000 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 8000 (11%)

Texel Rate

The Radeon HD 7770 is a bit (about 18%) more effective at AF than the GeForce GTX 650. (explain)

Radeon HD 7770 40000 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 6144 (18%)

Pixel Rate

The GeForce GTX 650 is a little bit (approximately 6%) faster with regards to full screen anti-aliasing than the Radeon HD 7770, and should be able to handle higher resolutions more effectively. (explain)

GeForce GTX 650 16928 Mpixels/sec
Radeon HD 7770 16000 Mpixels/sec
Difference: 928 (6%)

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

Display Prices

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GeForce GTX 650

Radeon HD 7770

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.


Display Specifications

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Model GeForce GTX 650 Radeon HD 7770
Manufacturer nVidia AMD
Year September 2012 February 2012
Code Name GK107 Cape Verde XT
Memory 2048 MB 1024 MB
Core Speed 1058 MHz 1000 MHz
Memory Speed 5000 MHz 4500 MHz
Power (Max TDP) 64 watts 80 watts
Bandwidth 80000 MB/sec 72000 MB/sec
Texel Rate 33856 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 384 640
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 1300 million 1500 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.2

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.


20 Responses to “GeForce GTX 650 vs Radeon HD 7770”
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Dane says:

GTX 650 > HD7770 for sure!

Fruitty Koksukir says:

I love this card, but I love kok in my azzwhole alot more! Call me!

Looking to buy a new Graphics Card! Need advice~ says:

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Inquiry - which entry level gaming GPU is a good buy says:

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bill says:

GTX 650 2GB > RHD7770 1 GB
GTX 650 1GB < RHD7770 1 GB

Sapphire HD 7770 or Gigabyte HD 7770 - Page 5 says:

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Anonymous says:

AMD Radeon HD 7770 1GB GDDR5 is better than NVIDIA GeForce GTX 650 1GB GDDR5, but AMD Radeon HD 7770 1GB GDDR5 is a little bit slower than NVIDIA GeForce GTX 650 Ti 1GB GDDR5.

Emma Müller says:

MIERDA!!! cambie mi GTX 650 por un HD 7770 y me parece que andan igualadas, en unas horas comprare una GTX 560, esa si que es de las buenas

Trifke says:

Dane is right. GTX 650 > HD 7770

Gusta_Cz says:

No. HD 7770 is better. Search google!

Trifke says:

Yeah but up there writes that the GTX 650 is better than HD 7770 and I belive in that what I saw !!!

Anonymous says:

GTX 650 is a slightly faster card than the HD 7770 but the 7770 is makes it up in graphics. I would say that the HD 7770 is slightly better than the GTX 650 because graphics and performance is more important.

Noorba says:

I think these comparsion methods are useless. The pixel and texture fill rate with memory bandwidth information will never show the real performance of the GPU architecture. If there were theoretical computing performance (GFLOPS) in the comparsion, then that also wouldn't be enough to see the truth. Only real game tests are usefull so You'd rather check test at Techpowerup for example. Radeon HD7770 is faster by 15-20% than's a fact!

tarun says:

gtx 650 is better than hd 7770

john says:

isf we overclocked GTX 650 it 10 faster than hd7770 :D

GAME says:

yes GTX 650 faster than HD7770

deep says:

I will agree with most of them here and my research that gtx 650 is faster and consumes less power than amd hd7770

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