Power Consumption and Temperatures
With all the power efficiency improvement talk that NVIDIA has been pushing on us since learning about the new Kepler GPU, we were eager to see how the actual power consumption actually turned out.
One of the ways that NVIDIA’s higher end Kepler chips have been able to differentiate from previous generations is by offering best in class performance while also being more power efficient than the competition. While the performance of the GT 640 is definitely suspect, the power consumption numbers are great to see with a 10 watt delta between it and the HD 7750 under a full load. Comparing the GT 640 to the previous generation GTS 450 card, there is a HUGE power consumption difference of 47 watts! That is nearly enough for another GT 640.
The GK107 chip is also running quite cool, in part least thank to the larger heatsink that Galaxy has used to whisk the heat away. At only 54C in our testing that does give the GT 640 an advantage in terms of power, heat and noise for a HTPC integration.
If this is not a complete
If this is not a complete waste of a card i dont know what is. looks like im buying a 6770… or an ageing 450…
did you try some overclock on
did you try some overclock on this card? particularly the core,
this card as it is is far from a good choice at its price point, BUT with DDR5 and a higher clock it could probably compete well with the 550 Ti,
and that’s one of the reasons why I think there is no GT 640 DDR5 right now… high demand for gk107 on mobile and OEM!? and still significant stocks of old gf106 stuff for sale (GTS 450, GTX 550 Ti)?
it’s the only explanation I can see…
Would this make a good
Would this make a good dedicated physx card?
Damn, that’s pretty bad.
Damn, that’s pretty bad.
Where is comparison to GT
Where is comparison to GT 440? Comparing GT 640 to GTS 450 is like comparing GTX 550 TI to GTX 460.
BTW can you post synthetic from CUDA-Z, I’d like to see if float to double precision, and float to integer, ratios are the same as on GF 104.
If prices are as they are
If prices are as they are now, this is a perfectly valid comparison.
You wouldn’t believe the
You wouldn’t believe the amount of DDR5 GTS 450’s & gen 2 460’s im selling. Hell, the DDR5 440’s outsell the 610,620 etc. 5-1.
GTS450 and the slim 550’s are VERY popular for (ATX) HTPC use right now. With the exception of the 670,680 the entire 600 line is a total dud thus far..At least that what the consumers are saying with their wallets.
One good use for the GT 640 –
One good use for the GT 640 – works OOB in a Mountain Lion hackintosh. Much faster than integrated HD 3000
Which GT 640 did you use?
Which GT 640 did you use? The one reviewed here?
Hello guys, just wondering
Hello guys, just wondering how does this card comapre to the nvidia gt240 i have with 1 gb ram ddr5.im looking to boost the graphics a bit.it has to fit into a hp case at the moment so i cant do a big card and the other limit im having is my 350 watt power supply,are the cuda cores the most important thing to look for or clock speed ?? thanks
If your on a budget and cant
If your on a budget and cant upgrade PSU
Galaxy – GeForce GT 440 1GB DDR3 PCI Express 2.0 Graphics Card
Is about as good as it gets.
I dont recommend buying the 640 if your PSU is rated at 350, because its pushing it, your system uses some of that 350 up already. It might be fine, but might not be either.
Its a valid review, but its
Its a valid review, but its missing the big sellingpoint of the NVIDIA 640.
Its a little faster then the 440 or 450 and It uses 350w power vs 300w power.
If your on a budget, don’t really game, maybe only play one game like WOW or Diablo III. This is an amazing card.
I really didnt want to spend 200$ and buy a 150$ card + a new PSU just for 20~ fps
This is perfect for modded minecraft and a bit of light work in blender and other art programs.
I am happy with this graphics
I am happy with this graphics card but I am no expert. I can run Starcraft 2 on Ultra settings and Train Simulator 2013 on High settings. Milkdrop looks great. I can’t run everything at full hd but it runs quietly.
Can the GT 640 support 3
Can the GT 640 support 3 displays out of the box without any active adaptors?
You guys have absolutely no
You guys have absolutely no idea what you’re talking about.
This card could easily run any game you throw at it at modest resolutions on medium to high settings.
Unless you’re playing on a 40 inch display or multiple 20 – 30 inch displays, you’re not going to be able to tell the difference visually between high and ultra in 90% of the games out there.
The GT 640 (And the GT 440) are probably two of the best budget cards on the market from NVidia.
I agree the GT440 DDR5 is one
I agree the GT440 DDR5 is one of the most underrated cards, Ive been using it for a couple years now and have it overclocked to almost 900 mhz and it plays all of my games well, not everyone has the money for the high end cards, Im gonna try this card out soon.
I just picked this card up a
I just picked this card up a week ago or so for about 80 dollars at my local best buy. I’m running an aged Core 2 Duo 2.13gh and a limited 375watt psu. I was originally using a GeForce 9500GT…I am in that realm where I don’t have money to throw out on a whole bunch of crap for a PC right now – – but I needed a little extra horsepower to play games like Tomb Raider and such. 6 or 8 months from now – -I may be in a better situation…but for now – – I had limited options and took a gamble on the 640 (This exact card, incidentally). So far, it rocks. Paired with this older processor and such…I don’t really notice any of the “limitations” drawn from only having DDR3 ram and such. I am not rocking a Core i7 in this thing. I have a Core i7 machine back home with my parents that is running a 560 Ti – but i’m in Virginia..that thing is in Florida – – gotta do what I can with what I got. I’m also running on a 1280×1024 display, so I don’t have super high resolutions to try and run at either. And oddly I can play Battlefield 3 Campaign with my presets from my Core i7 machine which are all Ultra. Don’t really know why it’s playable or if it’s just a bug, but it seems to work just fine and without any really noticeable lag, will have to load up fraps and check the framerate. But in the end, for anyone with technical restraints and monetary restraints, I can say that this card is worth it… If you can get it under 100 dollars – – it’s definitely worth it, and even more so if on an older machine like me.
can the galaxy geforce gt 640
can the galaxy geforce gt 640 support 300w psu?
Yes, it can, very
Yes, it can, very suprisingly. Just expect to make a few tradeoffs.
I originally bought this exact card from Best Buy to put in my aging Dell machine on a Pentium 4 3ghz with 4gb of DDR2. FAR from modern modest specs, but I was on a budget.
Recently I upgraded to a budget gaming desktop (Also from Best Buy), the Gateway DX4885, which has a 3.16 ghz Core i5 with 8gb of DDR3. I got the system home and found out that they used a BTX Power Connector with a meager 300w supply, which makes upgrading next to impossible without changing the motherboard or buying from Gateway directly. I plan to eventually change out the board for something mainstream with more features, with an ATX connector, since the case itself is a regulard ATX case with a non-standard motherboard and supply. I have a 450w supply I had only recently purchased when the supply died on the replaced machine.
TL:DR
The GT640 would not boot without disconnecting the DVD drive, due to lack of power wattage. Howevever, removing power to the DVD drive (which I rarely need anyway) left me with enough wattage to power both the graphics card, and to also use the dvd SATA and power connectors for an extra notebook-size 1.5 TB HDD.
Ive owned this card more than
Ive owned this card more than a year and can tell u that any game is playable comfortably provided shadows and anti-aliasing are disabled or lowered.
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