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Nvidia GeForce GT 640 Review: Cramming Kepler Into GK107

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Anonymous
June 5, 2012 1:40:55 AM

Would like to see a GDDR5 version of this card. Be interesting to see the performance difference.
Score
21
a c 161 Î Nvidia
June 5, 2012 1:42:54 AM

At least we now have a card from Nvidia that can be called min gaming card and be installed on machines with low power PSU's.
Score
3
Related resources
June 5, 2012 1:51:32 AM

Darn... nVidia, step up the game in this segment!

This doesn't even get close to the card placed just 10 bucks above.

Cheers!
Score
31
June 5, 2012 1:53:05 AM

The DDR3 is without a doubt holding this card back. With a maximum memory bandwidth of just 28.5 GBps I'm surprised the card performed as well as it did. I'm just not sure what Nvidia was thinking. At 900MHz, GK107 would probably be capable of easily outperforming the GTS450. Was it cost savings, or perhaps a TDP limitation that made them choose DDR3 over GDDR5? If keeping below a 75W TDP was the problem, why not just use 1GB GDDR5 instead? Or even slightly lower the core clock if necessary? It probably still would've resulted in better performance.
Score
4
a b Î Nvidia
June 5, 2012 1:53:57 AM

Almost, nVidia, almost!
1. With the GT440 and GT240 offering it, I can't believe someone won't quickly release a GDDR5 version. With such an obvious improvement that would be, it does not bode well for yields or other costs that DDR3 had to be used, and the card still has a $100 initial price. Can it come down to where it needs to be without becoming a "loss-leader?"
2. Pretty decent settings were used in the charts. Considering how good most modern games look even cut down to "medium" settings, that HD7750 at or near the top of the charts makes people who insist you need a $300 graphics card to play games look silly. This makes me wonder all the more what this new card could do with GDDR5, assuming it's economically feasible. Of course if it isn't, then this card simply loses except in that niche [business] market that wants to run three monitors.
3. I think the word you were looking for in reference to the absence of a PCIE power connector is "eschew."
4. Interesting, I noted that the box image is of a Seraphim from the game Sacred 2. Might that [older] game be included with the card, is it meant to advertise that the card supports PhysX (which Sacred 2 will use), or is there a copyright lawsuit on the way?
Score
13
June 5, 2012 2:02:11 AM

If this card retails for the $100 this article is implying then its a really tough sell. The 7750 outperforms the 640 in every way except loaded power consumption and for a meager $10 more....
Score
21
June 5, 2012 2:06:00 AM

where's the 6770 in this benchmark?
Score
0
June 5, 2012 2:12:54 AM

wow... is this card going to sell for $75?

I think nvidia doesn't want to kill amd outright and comes up with these really bad products.
Score
-9
June 5, 2012 2:19:46 AM

cumi2k4where's the 6770 in this benchmark?

6770 is slower than 7750. It is also older gen. Why put that?
Score
1
June 5, 2012 2:35:06 AM

As always Nvidia only makes good products for the high-end market and forgets about low-end or just makes crappy ones. This shouldn't surprise anyone
Score
16
June 5, 2012 2:42:18 AM

The march towards energy efficiency goes on, even at the cost of performance.

Nvida's biggest competition does not come from amd but from there legacy cards. Looks like the 7750 will remain the recommended card without external power supply.
Score
1
June 5, 2012 3:32:42 AM

what about the HTPC perspective?
Score
-1
June 5, 2012 3:34:32 AM

The performance from this card is disappointing. So much for driving down the prices of the 7750s... I've been wanting to start using the 7750 in mid range builds because of the low power/single slot solution. But at 110ish its just not justified compared to the low priced 6850.
Score
10
June 5, 2012 4:38:00 AM

> ... The DVI, VGA, and HDMI outputs are capable of handling a trio of independent displays at the same time. And, unlike AMD's cards, you don't need a DisplayPort monitor or adapter to get the array up and running ... We tested triple-monitor Surround and had no trouble playing DiRT 3 at 5760x1080 using the lowest detail setting.

For such a low end video card, WOW... things really start get changing now...
Score
1
June 5, 2012 4:40:33 AM

Where the hell is the GTX 660?
Score
13
June 5, 2012 5:35:40 AM

Looks like 77-- cards price not going down for while... (still waiting 78-- to drop...)
Score
3
a b Î Nvidia
June 5, 2012 7:11:26 AM

So basically Nvidia FINALLY managed to give us 8800GT performance levels without the 6pin PCIe plug. I know the 8800GT was way ahead of its time, but we are talking 5+ years here aren't we? Its a good card, but way overpriced. If you have $100 you are much better off with the 7750.
Score
9
Anonymous
a b Î Nvidia
June 5, 2012 7:16:25 AM

needs to be $75 so the kids don't have to mow too many lawns to play D3.
Score
9
June 5, 2012 7:33:53 AM

That is rater poor performance at the $100 mark. Just curious to know how well these scale in SLI since its competitor 7750s seem to scale very well!
Score
6
June 5, 2012 9:02:15 AM

At hardly 40 bucks more one could get a GTX460 and that has double the performance at least on paper vs this stupid card! Its sad what Nvidia is trying to pass off to customers!
Score
6
June 5, 2012 9:27:27 AM

Eschew, Don, not askew aux connectors, last page.

This has been a friendly reminder from grammar police.
Score
5
June 5, 2012 10:04:36 AM

deltree86At hardly 40 bucks more one could get a GTX460 and that has double the performance at least on paper vs this stupid card! Its sad what Nvidia is trying to pass off to customers!


Apples and oranges. 40 bucks is quite a bit, and also this card is a green card not only in the sense that it's made by nvidia. It uses a lot less power and generates a lot less heat, and it gets all the power it needs from the pci express slot itself.

It's still lackluster compared to amd's cards though.
Score
7
June 5, 2012 10:16:18 AM

Ouch, price for performance is pretty awful.

I managed to pick up a 7770 for $105. I know the 7750 can be had at the same price as this. So i'm not sure who would buy this when you can have so much more going AMD at $100. I really liked the Kepler architecture price/performance with the GTX 680/670 but this is dismal. AMD reigns king in the low end cards for now. I hope they release some killer cards with the upcoming GTX 650/660.
Score
12
Anonymous
June 5, 2012 10:36:08 AM

I know that the test system uses a very powerful processor in order to remove any possibility of a CPU bottleneck, allowing Tom's to compare different video cards against each other.

However, I don't understand how these results can tell you whether or not these cards will play your games at the resolution and settings you want. The likely buyers of this card are people who want to upgrade their 2-year old Dell without upgrading their power supply, and they're sure as hell not running an i7-3960X.

So, commenters... here's a good reason why people buy $300 video cards: they don't want to buy $1000 processors.
Score
-2
June 5, 2012 10:39:32 AM

Quote:
All of the cards we tested are acoustically-tolerable. The Radeon HD 7750 is a little louder than the rest of the pack under load, but it’s not problematic by any stretch.


0.5 dB is "a little louder" ?

Either your noise meter is faulty or you have the best hearing in the world. Normal humans cannot detect 1 dB difference (and most people beyond their teens would struggle or fail with 2 dB as well) yet you managed to somehow notice the 0.5 dB difference ... astounding !
Score
1
June 5, 2012 10:51:07 AM

rohitbaran6770 is slower than 7750. It is also older gen. Why put that?

Incorrect, it's the other way around. 6770 is slightly > 7750.

The Greater GoodWhere the hell is the GTX 660?

Check out the specs of the 680M. Likely what the GTX 660/660Ti will look like, if they do it like Fermi.
Score
7
June 5, 2012 11:09:31 AM

gondor0.5 dB is "a little louder" ? Either your noise meter is faulty or you have the best hearing in the world. Normal humans cannot detect 1 dB difference (and most people beyond their teens would struggle or fail with 2 dB as well) yet you managed to somehow notice the 0.5 dB difference ... astounding !


From experience and reading graphics card reviews over time, I come to the conclusion that the decibel meter doesn't paint a complete picture; it's basically one point of measurement in a sea of sounds. A graphics card might not measure louder, but it could produce a more, or less, irritating noise to a listener, or even a louder sound than what the meter registers.

Any audiophile can tell you sound is a very subjective output form; there is still no real way to tell you what the best speaker, amplifier, or pre-amp is, or source, with measurements taken in the lab. You might (or might not) be entirely accurate in implying he couldn't hear the difference in decibels, but wrong in assuming the cards sound exactly alike with one measuring a practically inconsequential amount louder.

;) 
Score
4
June 5, 2012 11:30:55 AM

I've seen the hd 7750 for 105$. This nvidia card, at this price, is useless.
Score
7
June 5, 2012 11:53:47 AM

I am stoned that what have they done to GT640 that with 2 times the cores it is so much slower than GTS450!!! How can this be? Is that just because of the DDR3 RAM?

I was hoping to upgrade my GTS450 and save 50% power but it seems it won't happen.
Score
3
June 5, 2012 11:57:35 AM

How about some NVENC performance numbers?
Score
0
a b Î Nvidia
June 5, 2012 1:07:37 PM

Not bad for a lower end card
Score
-5
June 5, 2012 1:34:54 PM

i laugh at amd trying to be more competitive by raising clock speeds on all of its cards
Score
-9
June 5, 2012 1:42:49 PM

americanbrianEschew, Don, not askew aux connectors, last page. This has been a friendly reminder from grammar police.


Not my fault! The editor added that.

Fixed! :) 
Score
4
June 5, 2012 1:44:51 PM

Marcus52From experience and reading graphics card reviews over time, I come to the conclusion that the decibel meter doesn't paint a complete picture; it's basically one point of measurement in a sea of sounds.


Exactly.

Not only that, but decibels don't measure pitch; a high pitched fan is much more annoying than a low-frequency noise.
Score
6
June 5, 2012 1:47:08 PM

Slomo4shOThat is rater poor performance at the $100 mark. Just curious to know how well these scale in SLI since its competitor 7750s seem to scale very well!

If you figure out a way to run two of the 640s or 7750s, let us know. Going to be tricky with no bridge for them. ;) 
Score
-2
June 5, 2012 2:05:40 PM

mayankleoboy1what about the HTPC perspective?

The only thing you need to add to the picture for HTPC is if it will play blue ray... and every dedicated GPU made in the last 5-7 years can play blue ray back just fine, and if you have a current gen CPU then the onboard GPU has more than enough power for video playback.

In other words; It is a moot point. If anything can play back video, but other cards that are merely $5 more can knock the socks off this product in other segments, then there is no point in even looking at the 640 until the price comes down a bit. Besides, until there is a fanless passive cooler for the product then there is little point in adding it to an HTPC.
Score
-1
June 5, 2012 2:08:07 PM

If only Nvidia used the GDDR5 memory, the GT 640 woulda totally smoked the 7750.
Score
-6
June 5, 2012 2:11:43 PM

varun706If only Nvidia used the GDDR5 memory, the GT 640 woulda totally smoked the 7750.


That might be optimistic, there's a huge spread there. Probably around the GTS 450, or between the GTS 450 and the 7750.

But we'll see if they ever make it to market.
Score
6
June 5, 2012 2:53:37 PM

Where is the %^@$^@! GTX 660 Ti!
Score
9
June 5, 2012 3:19:43 PM

Its performance is what I consider very basic, but it has power draw and temperature in its favor, even against the 7750 and 6750. So for HTPC and OEM applications this looks to be just as much of a winner as the 6750 is.
Score
1
June 5, 2012 3:33:34 PM

yannigr384 shaders much slower than the old 192? I love marketing.


Not marketing so much as Fermi's architecture is vastly different from Kepler's.

They aren't 1:1 comparable.


Score
4
June 5, 2012 3:34:23 PM

Let's see some competition
Score
2
June 5, 2012 4:07:49 PM

30 fps in Metro 2033 at full HD *Bitch please*
Score
-5
a b Î Nvidia
June 5, 2012 5:37:24 PM

$100 now days buys a used GTX460/280/285 and sometimes a gtx465/470 which easily leaves this card in the dust. Was it wrong of me to have expected more from it, I don't think so given the specs of the gpu and clocks it should have been at the very least pretty close to the gts450. As for the memory GDDR3 on anything less than 256bit let alone 192 yields very desperate performance results.
Score
4
June 5, 2012 6:15:52 PM

yannigr384 shaders much slower than the old 192? I love marketing.


wmacI am stoned that what have they done to GT640 that with 2 times the cores it is so much slower than GTS450!!! How can this be? Is that just because of the DDR3 RAM?I was hoping to upgrade my GTS450 and save 50% power but it seems it won't happen.


CleeveNot marketing so much as Fermi's architecture is vastly different from Kepler's. They aren't 1:1 comparable.


Aww...ya beat me to it. :D 
Score
2
a b Î Nvidia
June 5, 2012 7:07:00 PM

This nvidia card, at this price,i am not sure it will sell very well
Score
3
June 5, 2012 7:14:13 PM

What a piece of junk!

Even HD 7750 is more power efficient and you really should stare at idle power consumption and idle temps.

"The Radeon HD 7750 is a little louder than the rest of the pack under load, but it’s not problematic by any stretch." You think!?!? It's half a decibel! Can you hear half a decibel difference? Nicely cut graph from 41dB to 45dB btw. Lying at graphs and puffing nvidia is really the writers forté.

One must be a serious nvidia fan to buy this or a total sucker.
Score
-4
June 5, 2012 7:23:07 PM

scrumworks"The Radeon HD 7750 is a little louder than the rest of the pack under load, but it’s not problematic by any stretch." You think!?!? It's half a decibel! Can you hear half a decibel difference?


Decibels do not represent frequency, as mentioned in a previous post. High frequency noises are more noticeable than low frequency noises, and the 7750 spins at a high RPM when under full load.

Nevertheless, I made a point of telling people that it's not a big deal, scrum. Not sure why you honed in on it.

scrumworksNicely cut graph from 41dB to 45dB btw. Lying at graphs and puffing nvidia is really the writers forté.


This completely has me baffled. You do understand the concept of ambient noise, right? The ambient noise of my lab is 41 dB. So it represents zero.

As for the top of the graph being 45dB, if I zoomed it in to the 7750's maximum it would make the AMD card look terrible. So I went out of my way to frame the chart in such a way that the top end of the range represents something that would be notably louder, and so that people could see that the 7750 isn't terrible even though its load result is slightly worse.

You interpret this as "lying and puffing Nvidia"?

You're really digging deep to find an anti-AMD conspiracy this time, to the point where all sense has been abandoned and you're actually complaining about me giving the 7750 a break and going out of my way to show it isn't that bad.

Is this honestly the best you can come up with as far as proof of anti-AMD sentiment? I think that's one of the saddest comments you've ever made, really.
Score
10
a b Î Nvidia
June 5, 2012 9:00:30 PM

Its nice to see that Nvidia has finally managed to make a halfway decent budget card. They haven't had one in a very long time.
Score
1
!