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Insane spec laptop - your thoughts?

post #1 of 13
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A family member has bought one of these;

http://cgi.ebay.co.uk/B-NEW-Dell-stu...-/350416339481

It looks VERY dodgey to me. What do you guys make of it?? I mean.....if this was even real, the battery would die in 2 mins if it's not plugged into the mains, surely??

An i7 laptop, 16gb ram, 1tb hdd and 3gb gpu ?? I didn't even know you could get a 3gb gpu yet !
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post #2 of 13
it exsists, jut the spec on the video card is wrong, it has most likely 1gb of dedicated ram, and the extra ram is being pulled from the system ram.

http://www.notebookcheck.net/NVIDIA-...M.35835.0.html
http://www.trustedreviews.com/laptop...-17--L701X-/p1

really not that impressive as far as the video card goes.

The cpu in it is only 1.7ghz, which is pretty standard
http://ark.intel.com/Product.aspx?id=49024
post #3 of 13
This isn't all that great 3GB of ddr3 < 1.5 GB of ddr5. You will likely not use more than 4GB of ram for gaming. You also have to remember that these are not desktop parts they use much less power, the GTX 445m performs approx around ATI 5470/5550 desktop variations. The battery life would be around 1~2 hrs w/o gaming while gaming you would get less than 1hr.

And yeah its real.
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post #4 of 13
ummm how does the spec of the ram have anything to do with size?

GDDR 3 vs GDDR5 has zero difference in usage amount. it only changes the speed.

My GFs laptop is pretty much just as fast as that thing and the battery lasts around a hour with gaming and close to 3.5 hours without gaming. 4.5 hours if you switch from the ati graphics to the Intel HD graphics.

http://www.newegg.com/Product/Produc...-779-_-Product

Yes, i know it only has a dual core, but it is still HT, and it is nearly twice the clock speed of that i7.
post #5 of 13
Quote:
Originally Posted by thrasherht View Post
it exsists, jut the spec on the video card is wrong, it has most likely 1gb of dedicated ram, and the extra ram is being pulled from the system ram.
It is actually 3GB of DDR3 vram, the units running DDR5 are running 1.5GB or less.
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post #6 of 13
Quote:
Originally Posted by thrasherht View Post
ummm how does the spec of the ram have anything to do with size?

GDDR 3 vs GDDR5 has zero difference in usage amount. it only changes the speed.
It is a change in hardware design to offer less heat and more battery life for approx the same performance. Like I say 445m 3GB DDR3 will not perform as well as 445m 1.5 GB DDR5.

The GPU must process and hold frames (in the vram) above and beyond what is being displayed on screen, since DDR3 runs at slower speeds than DDR5, it will take it more time to move frames into and away from the vram so to accommodated for this more frames will be buffered and stored on the vram.

Quote:
Originally Posted by thrasherht View Post
My GFs laptop is pretty much just as fast as that thing and the battery lasts around a hour with gaming and close to 3.5 hours without gaming. 4.5 hours if you switch from the ati graphics to the Intel HD graphics.

http://www.newegg.com/Product/Produc...-779-_-Product

Yes, i know it only has a dual core, but it is still HT, and it is nearly twice the clock speed of that i7.
The i7 consumes 10 more watts, as well as running hotter than the i5 (as such a fan must run faster to compensate. The graphics card in that laptop only consumes 26 Watts while a 445m is approx 35w again 10 more watts. You also have a 15in screen vs a 17in screen backlights, a 5400RPM drive vs 5400 RPM drive, + a build in sub woofer all of which "need moar powah" and the only thing to compensate for all of that? An additional 3 battery cells.

Now I'm not guaranteeing the dell unit would get that specific amount of battery life but it would definitely be within 30 min of the times I gave.

Also while clock speed is still an important factor, it doesn't determine the performance or power usage of a processor as much as it used to. The chip architecture and design have more of a say in those respects. Comparing clock rates of 2 procs in the same line will give you and idea of which is better, hotter, more power hungry. But the same doesn't apply when comparing between 2 different lines.
Edited by Unacceptable - 1/3/11 at 12:19pm
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post #7 of 13
Quote:
Originally Posted by Unacceptable View Post
It is a change in hardware design to offer less heat and more battery life for approx the same performance. Like I say 445m 3GB DDR3 will not perform as well as 445m 1.5 GB DDR5.
I think you are failing to understand completely how video ram works.
Although you are right about the same card performing better with gddr5 and half the ram, you don't know why it will.

On a laptop your screen isn't nearly as high of resolution as a desktop, higher resolution means higher ram usage, faster ram means more memory bandwidth. so your theory is slightly flawed.
post #8 of 13
Thread Starter 
hi again guys,

interesting read. I cant decide whether or not he has been ripped off. 16gb ram is definitely overkill, even if 16gb of laptop ram isn't as good as desktop ram in my opinion.
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post #9 of 13
Quote:
Originally Posted by Unacceptable View Post
The GPU must process and hold frames (in the vram) above and beyond what is being displayed on screen, since DDR3 runs at slower speeds than DDR5, it will take it more time to move frames into and away from the vram so to accommodated for this more vertex data will be buffered and stored on the vram.
Forgot to be more specific

Quote:
Originally Posted by thrasherht View Post
faster ram means more memory bandwidth. so your theory is slightly flawed.
This is essentially what I just said, you just used more specific terms. While vram is a factor in deciding the resolutions your graphics card will support, that is not the only thing that vram is used for. please read.
Edited by Unacceptable - 1/3/11 at 1:56pm
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post #10 of 13
Quote:
Originally Posted by bizarrebob View Post
interesting read. I cant decide whether or not he has been ripped off. 16gb ram is definitely overkill, even if 16gb of laptop ram isn't as good as desktop ram in my opinion.
How much did he pay for it? $1600 USD, Eh not really but he certainly didn't get a good deal either.
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