GeForce GT 640M
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GeForce_GT_640M
Release period
Release Period- Mar-2012
GeForce GT 640M Review
GeForce GT 640M is a middle-class mobile GPU based on the 28nm Kepler GK107 Core.
It offers 384 Shader Processing Units, 32 TMUs and 16 ROPs on a 128-bit memory interface of 2GB DDR3 (though GDDR5 is also supported but it most likely won't be used due to the increased cost and small performance boost). The central clock runs at 625MHz (709MHz in Turbo Mode) and the memory clock operates at 900MHz. Expect a power consumption of up to 32 Watt.
Benchmarks indicate its performance is quite average and that some modern demanding games are playable at high settings using a 720p resolution though small tweaks will be required to achieve more fluent (30+) FPS.
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GeForce GT 640M Performance Specification
Core Speed
Architecture
Memory
Memory Speed
Memory Bus
Memory Type
Memory Bandwidth
Technology
TMUs
Texture Rate
ROPs
Pixel Rate
Pipelines
Direct X
Shader
Open GL
Resolution (WxH)
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PSU
GPU Details
625 MHz
Kepler GK107
2048 MB
900 MHz
128 Bit
DDR3
28.8GB/sec
28nm
32
20 GTexel/s
16
10 GPixel/s
384
DX 11
5.0
4.1
2560x1600
32 Watts
Laptop GPU - No PSU
Notebook GPU
SLI/Crossfire
Dedicated
Integrated
VGA Connection
DVI Connection
HDMI Connection
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Best RAM Match
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GPU Upgrade
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GPU Features
1
1
1
Core i5-3210M 2.5GHz
6 GB
1366 x 768
-
Game-Debate Value Rating A standardised value score that gives an indication of GPU price to performance. Each score will adjust over time as prices change and performance expectations shift in todays marketplace.
GD GPU hardware score: 6
Game-Debate Hardware Rating A standardised score that can be used to compare game system requirements directly with individual hardware components. Each score will adjust over time as better tech is released.
8.5
6
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Discussion Page 1
johnny1985548
01:34 May-09-2013

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How will this card perform with an Intel Core I7 3630QM and 8Gb of ram and a screen of 1366x768? On games like L4D2,Far cry 3,Resident Evil 6,Dead Island...games like that but not very demanding ones? :O
Mukulgupta
11:45 May-13-2013

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left for dead 2 is easily maxed
far cry 3: i get about 26 fps on high without aa
resident evil: playable at high
dead island is maxed
kevdee
10:10 Mar-06-2013

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hi pip my card is the 2gb ddr5 version could you add this card many thanks kev
Pip
10:29 Mar-06-2013

Hi.
You have selected a desktop CPU and a laptop GPU. Which one is it? Desktop or Laptop? GT 640 2GB GDDR5 is already added.
kevdee
19:46 Mar-06-2013

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hi mate i have a dell xps 27 all in one i think the cpu is a desktop one but with small underclock graphics is laptop gt640m 2gb ddr5
Pip
22:13 Mar-06-2013

Okay. Use CPU-Z to find out :D
maza90210
12:52 Mar-31-2013

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it's an all in one PC from what i have searched, and PIP from teh DELL website it does have a desktop processor and a laptop GPU, quite weird but he has the right specs
NightRiven
19:44 Mar-04-2013

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Compared to my GPU, how much better would this one be?
maza90210
12:53 Mar-31-2013

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the gt 640m is about 40-60% better
madalin0129
14:15 Feb-07-2013

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Have I made a mistake buying a laptop with 7730m instead on 640m ( 2gb ddr3 both ) ?
upsurge
05:49 Feb-09-2013

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The GT 640M is like 5-7% better than the HD7730M which is negligible... The 2GB DDR3 is a bloody gimmick my friend... Most DDR3 enabled GPUs do not have the power to fully utilize the 2GB VRAM... They at the most utilize about 1.2GB... A GT640M 1GB DDR3 and 2GB DDR3 offer identical performance but if the 2GB is GDDR5 then it will be fully utilized and performance increase should be like 7-8%... However no modern game utilizes more than 1GB VRAM at your resolution... You only need 2GB GDDR5 GPUs if playing at say 1980x1200 and ultra-high settings and even then only 1.5GB VRAM is utilized...
gamingcore
11:55 Feb-12-2013

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no, you have'nt, 7730m is much more powerful than 640m, not only in gaming, but in benchmarks too:
640m 3DMark 11 1846P: http://www.3dmark.com/3dm11/5889873
7730m 3DMark 11 2109P: http://www.3dmark.com/3dm11/5893694
These results are recent and on stock clocks, shows 7730m>640m, also in gaming 640m only excels in Nvidia optimized games (Mp3, Arkham City), also AMD's GCN architecture beats Nvidia's Kepler in application performances
gamingcore
11:58 Feb-12-2013

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I still don't understand how Pip rated 7730m a 5 and 640m a 6, they both deserve a 6 in my opinion..
Pip
13:07 Feb-12-2013

Like I said on your wall, please show me benchmarks and it's the % difference that matters, not the rank itself. Oh and sure, give me one 640M paired with an i5 and 7730M with an i7 ;)
gamingcore
14:46 Feb-12-2013

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ok, lemme collect some benchies of gameplay, and btw, i5 and i7 does'nt matter here, graphics score is what matters:
1732 of 640m vs 1874 of 7730m..
what i posted above was total score only, but even graphics score is higher on 7730m..
Pip
14:56 Feb-12-2013

But the result for 640M is generic (based on various entries) while for 7730M it's a one time benchmark and when I searched for 7730M on that website, nothing was available ...
Pip
14:57 Feb-12-2013

and I don't like that website because GPUs such as Radeon HD 7660G which are integrated graphics have huge Mark Scores when in reality they perform poorly.
Pip
14:59 Feb-12-2013

Radeon HD 6520G has 1820 Score...so I rank it as good as 640M? ;)
gamingcore
15:11 Feb-12-2013

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well, 7730m did'nt appeared on that site because AMD released the 3DMark profile just in latest 13.2beta5 catalyst, before that 7730m was recognized as 7750m..
and about 7660G and others, those are'nt fair to be compared with 640m or 7730m, as both 640m and 7730m are independent cards, while 7660G normally comes in dual AMD GPU configuration, so total score for those is combined performance of 7660G and other (like 7660G+7670M).
Pip
15:53 Feb-12-2013

Okay then, show me some 3D game benchmarks :P
gamingcore
17:27 Feb-12-2013

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ok, after a bit of research, i chose GTA4 to be benchmarked, coz that's the only video i found on youtube with 640m with FPS shown without FRAPS recording..
This gameplay can't be objectionable coz settings are same, GTA 4 is said to be CPU as well as GPU Intensive (Poor optimization), and Driver version will be out of question as this is quite an old game, so optimized driver for this game were out much before both video were recorded..
gamingcore
17:31 Feb-12-2013

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the 7730m gameplay was recorded by me just now (recorded with my phone, so quality is poor and video is laggy, but FPS are clearly visible)..
640m Gameplay: http://www.youtube.com/watch?v=0Y3Q0cY-4_8
7730m Gameplay: http://www.youtube.com/watch?v=0PA1UKe9Wpw
both systems have i7, so processors are too equal, overall 7730m had more stable and greater FPS.
gamingcore
18:08 Feb-12-2013

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and i think the proper city driving he did in 640m video was b/w 3:40 and 4:07, rest was either in the airport or standing.. (of course airport will have less to render so stable FPS)..
Pip
20:25 Feb-12-2013

I am sorry but that is not enough. I have seen benchmarks of GT 640M and 7730M on a competitor's website and 640M won in every case...
xelero
13:53 Feb-13-2013

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you have to ask someone who have both of them and ask him to compare.. Don't trust benchmarks from others sites .. Even the high benchmarks from notebookcheck of gt 640m marked as ddr3, in fact was a ddr5 640m version
xelero
13:57 Feb-13-2013

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and I saw 7730m games on youtube running much better than 640m .. watch this crysis 3 beta mp for example , in high settings, without any overclock and with i5 http://www.youtube.com/watch?v=X66v10XYYLg&list=UUEfqC4jj37xNWfHGLswOTtg&index=9
ByGasal
20:15 Oct-30-2012

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This is £30 cheaper than 650M. Worth it?
Pip
22:48 Oct-30-2012

It depends if it's GDDR5 and if the GT 650M is also GDDR5 too.
ByGasal
10:18 Oct-31-2012

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They are both DDR3
Pip
18:17 Oct-31-2012

Uh..don't buy a GT 650M DDR3..it's not worth it.
piere8
21:33 Oct-21-2012

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Getting a 17.2'' notebook, specs:
i7 3610QM
8GB DDR3 RAM
GT 640M (DDR3)
Wonder if it is a reasonable gaming laptop? BF3, Max Payne 3, GTA V games ready?
Pip
23:32 Oct-21-2012

Hum...
It should be good for Medium settings for those games..
tzzsmk
20:50 Jul-10-2012

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new ultrabook featuring this gfx card, res 1600x900, 14", 128GB SSD;
maybe for gaming on travels?
http://www.czc.cz/ultrabook-gigabyte-u2442n-champagne-gold/111035/produkt
eduguy1
05:33 Feb-09-2013

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What CPU? I can't open link. If it is a good CPU I think BF3 is ok. All Crysis. Crysis 2, Crysis Warhead work fine too I think.
tzzsmk
18:33 May-23-2012

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could HD6770m perform better as it has DDR5 mem. although slower clocks?
Tero
18:36 May-23-2012

Yeah that higher memory bandwidth really helps to keep things rolling ;) Much faster to load textures in and out of the VRAM :)
tzzsmk
15:16 May-07-2012

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so is it really better than GT 555m ?
Tero
15:18 May-07-2012

Yeah but not much... :)
tzzsmk
15:22 May-07-2012

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because half memory bus?
and how can be gtx460 only 5% better?
Tero
15:30 May-07-2012

Yeah that memory bus is a big letdown... Not so sure about GTX 460M, it has 192 bit bus... You could ask Pip about that, he's the one who ranks these ;)
Pip
23:32 May-07-2012

What is the doubt here? You guys think the GTX 460M should have much more than this one?
Tero
08:18 May-08-2012

I have no doubts, I'm not an expert on laptop GPUs :D I trust your ranking skills ;)
Pip
11:01 May-08-2012

The architectures are not directly comparable, but they are from the same "category". The GTX 460M wins in memory bandwidth, thanks to the 192 bits bus and the fast GDDR5 but it totally loses on the core clock speed. Still, the performance of the GTX 460M IS better but not THAT much better. Oh but this is subject to change :D
Pip
23:29 Apr-16-2012

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Overclock this to 810MHz and you have a GeForce GTS 650M. Put GDDR5 memory type (GeForce GT 640 GDDR5 also available) and raise the clock to 835MHZ and you have a GeForce GTX 660M. Even the GTX 660M has a cheap 128 bits Bus Width...anyone else gets what I am trying to say? NVIDIA played really dirty this time. This deserves a blog post.
cham0d
23:37 Apr-16-2012

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I completely understand what you are trying to say! :D
tzzsmk
21:37 May-08-2012

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so which should I go for?:)
Pip
21:40 May-08-2012

GTX 680M, obviously, when it comes out. :D
Getting a GT 640M and overclocking it is a bad idea because the cooling system is set for the 640M and not for the super OC version of it. :D
tzzsmk
21:48 May-08-2012

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I knew it :D , thx
kaloresi
22:47 Oct-14-2012

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But is it possible to do it, because a cooling table would be the solution for overheating...
NEON10338
10:04 Sep-30-2012

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NEON10338 has helped many fellow gamers. A great person to buddy!
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?????????????????? What did you say?
Discussion Page 1