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GeForce GT 640 DDR3 vs Radeon HD 7750


The GeForce GT 640 DDR3 makes use of a 28 nm design. nVidia has set the core frequency at 900 MHz. The DDR3 RAM works at a frequency of 1782 MHz on this specific card. It features 384 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Compare all that to the Radeon HD 7750, which features GPU clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also features 512 Stream Processors, 32 TAUs, and 16 ROPs.

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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 HD 7750 2240 points
GeForce GT 640 DDR3 1560 points
Difference: 680 (44%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
GeForce GT 640 DDR3 65 Watts
Difference: 10 Watts (18%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7750 should in theory be quite a bit superior to the GeForce GT 640 DDR3 overall. (explain)

Radeon HD 7750 72000 MB/sec
GeForce GT 640 DDR3 57024 MB/sec
Difference: 14976 (26%)

Texel Rate

The GeForce GT 640 DDR3 should be a bit (approximately 13%) better at texture filtering than the Radeon HD 7750. (explain)

GeForce GT 640 DDR3 28800 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 3200 (13%)

Pixel Rate

The GeForce GT 640 DDR3 will be a bit (approximately 13%) more effective at anti-aliasing than the Radeon HD 7750, and also should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GT 640 DDR3 14400 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 1600 (13%)

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

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GeForce GT 640 DDR3

Radeon HD 7750

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 GT 640 DDR3 Radeon HD 7750
Manufacturer nVidia AMD
Year June 2012 February 2012
Code Name GK107 Cape Verde Pro
Memory 2048 MB 1024 MB
Core Speed 900 MHz 800 MHz
Memory Speed 3564 MHz 4500 MHz
Power (Max TDP) 65 watts 55 watts
Bandwidth 57024 MB/sec 72000 MB/sec
Texel Rate 28800 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 384 512
Texture Mapping Units 32 32
Render Output Units 16 16
Bus Type DDR3 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 4.2 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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

Display Prices

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GeForce GT 640 DDR3

Radeon HD 7750

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.


16 Responses to “GeForce GT 640 DDR3 vs Radeon HD 7750”
Anonymous says:

es una difícil desicion!

roe150 says:

im an nvidia fanboy but i got to admit gt 640 is shit comppared to hd 7750

onerky R says:

the reality is that ati in HD Gaming is better than GForce but too expensive.

Mmmn says:

Pues yo las veo muy similares, una tendra GDDR5 pero gasta mas energia, pero la otra procesa un poco mas rapido, yo las veo casi parejas, si acaso un 10% mas rapida la 7750, pero obvio un 10% mas cara... por lo menos aqui en mexico.

SomeOne says:

But why is the nvidia more expensive if the 7750 better :O


cau hình laptop như thế này choi dc game Cabal ko ? says:

[...] Ruby Hole Ngày tham gia: Mar 2012 Bài viết: 335 Được cảm ơn: 19 Uy tín: GeForce GT 640 DDR3 vs Radeon HD 7750 – Performance Comparison Benchmarks @ Hardware Compare GT640 ddr3 và HD7750 ddr5 hoho Trả lời kèm Trích [...]

magic says:

Im not sure if we're looking on the same page (roe150 said 640 is shit compared to 7750) but GeForce is faster in every respect except for consuming more power.. I found it in low profile format £20 cheaper on ebay than 7750.

Jezshit says:

its because GT640 is highly capable in physx game, because it has 384 cuda processor and 1782 memory clock even its ddr3

RaidnU says:

Bottom line, HD 7750 is better at processing games, period.

Anonymous says:

I just grabbed HD 7750 to replace my HD 4650 without even thinking to change psu, even i only have 330watt psu!!

Anonymous says:

... and it run great!!! Wooohoo. NVDIA sucks i will never tricked by your stupid phsyx gimmick!

oldarmyguy says:

I have both the HD 7750 and a GT 640 but my my GT 640 card has GDDR 5 not GDDR 3. The bandwidth on 640 GDDR 5 card is approximately 91238 MB/sec. There is no comparison, it runs Skyrim, Diablo 3 and Starcraft 2 at higher resolutions and framerates then the HD 7750.

oldarmyguy says:

This is a corrections to my last post about the GT 640 GDDR5 card I have:
Bandwidth - 80000 MB/s.
GPU Clock - 954 MHz
Memory Speed - 1250 MHz (2500)
GFlops - 910.4
Pixel Fill - 15.3 GPixel/s
Texture Fill - 30.5 GTexel/s
I apologize about my previous post, I misread the GPU-Z printout. (Senior moment)

milisav says:

Memory Speed 1782MHz.Ha ha, higher from every card that's ddr3 already

chhuanga says:

i have used gt 640 before and i bought a 7750 dont know why its better here but for me 7750 is like much much more faster in witcher 2 i can only play in low with gt640 but with hd 7750 i can play with high

Dean says:

What is this?!
What's going on here?
I have both of these cards (nV GT 640 2GB*GDDR3 vs ATi HD 7750 1GB GDDR5) AND THE nVIDIA card is rubbish compared to the ATi/AMD.
In fact, I replaced the nV card with the ATi one (and relegated it down the chain, to another machine) before buying another HD 7750 to run in CrossfireX.
I think you've got your GDDR3 memory speeds wrong here also.

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