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My first ATI. which one should i buy? - Page 6

post #51 of 72
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Quote:
Originally Posted by pyra View Post
if your going to have an external graphics card and an external power supply why not put them in a case and and buy the rest of the parts for a desk top?
ahaha coz i need case 150 pounds cpu 200pounds mobo 150pounds etc etc....
i have a gaming laptop with quad core and its perfect until now..

what power supply should i use for 5870 ?

am finally going to buy this one ! am i doing right?
    
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post #52 of 72
I would really not bother, you put a card like a 6870 in an external slot and the bandwidth will starve it to death. Sure itll run dx11, but itll be so unplayable, and even dx9 and 10 will probably run slower than the 4850 you have in it already.
post #53 of 72
Quote:
Originally Posted by kapros2011 View Post
while i was looking in ebay xfx 5870 is the cheapest and they start from 160 pounds.. is there any other good uk online store for 5870 ? and not XFX i heart that their crap i love msi
XFX non-reference ATI cards=stay away from. If it's reference design, then OK.
As for the laptop use, I'm lost with that, LOL
     
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post #54 of 72
Hmm, I'm still dubious about it. Bandwidth could an issue, and having a 5870 an a PSU connected to a laptop, loose, negates all portability really.

Assuming you'd be running a standard PC PSU, when there is no load of what there would normally be load on (+5v I believe), PSUs tend to go out of spec, fluctuating voltages and not delivering enough power, which can kill cards.

As the previous poster said, you may as well just build a desktop, because I can honestly see this ending up in a dead 5870/laptop/person.
    
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post #55 of 72
seriously using laptop ?
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post #56 of 72
Quote:
Originally Posted by kapros2011 View Post
Just gonna go ahead and say it:

Bad idea. For SOOO many reasons.

1) that only supports PCIe x1 speed, the cards you are looking at are all PCIe x16.

2) even if it works, you will only be able to use thaw power of the card on an external monitor.

3) there are all sorts of power issues here, even if you use an external PSU to power the cards 6 and 8 pin connectors, it will not be balanced right from what the card tries to draw from the PCIe slot. You will very likely kill the card, the adapter, or your laptop's expresscard slot.

4) you will probably kill any PSU you try to use after a few months as well due to imbalanced loading. They are designed to power a full system, not a single card (which would ONLY draw from the 12v rail).

5) you WILL have driver issues. Games and windows will not like switching between those setups.

Do yourself a favor and save up and build a desktop. Do not try to Frankenstein desktop parts into laptops, it will not work out for the best.
Edited by kevingreenbmx - 3/30/11 at 5:12pm
post #57 of 72
Thread Starter 
omg....i found it here http://forum.notebookreview.com/gami...vidock-16.html

and its working perfect.... i think. u might have right as i dont have any clue on power consumption. i just though that ati will take the power it needs from the external PSU:SS
    
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post #58 of 72
PLEASE, please get a 6850 rather than a 6870.



Quote:
Originally Posted by Behemoth777 View Post
6850, no question dude. Overclocks like crazy, I can get 200mhz higher than the stock clock with my 6850's, can't say the same for most other gpu's out there. The 6870 is pretty crappy, I had one, and it only oc'd 30mhz higher than the stock clock, huge disappointment.
I have the same problem this guy has... my 6870 clocks 930mhz, while my 6850 clocks 1000mhz with the same voltage. Don't spend more for less.
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post #59 of 72
Quote:
Originally Posted by kevingreenbmx View Post
Just gonna go ahead and say it:

Bad idea. For SOOO many reasons.

1) that only supports PCIe x1 speed, the cards you are looking at are all PCIe x16.

Do yourself a favor and save up and build a desktop. Do not try to Frankenstein desktop parts into laptops, it will not work out for the best.
Looks like this adapter is needed
http://www.harmonicinversion.com/pro...product_id=191
     
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post #60 of 72
Quote:
Originally Posted by kapros2011 View Post
omg....i found it here http://forum.notebookreview.com/gami...vidock-16.html

and its working perfect.... i think. u might have right as i dont have any clue on power consumption. i just though that ati will take the power it needs from the external PSU:SS
You will see a bit down the page that even with a 3850 you got half the speed of a regular one, so with a bigger card like a 5870 it will loose even more, putting you no faster than a 4850 in the first place. Just making it a lot more complicated.
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