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bottlenecking


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#1
ryang96

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first of all, lets see if i got this right :) ..bottlenecking is when the power of a pc component is limiting something else.

second would a 4870 and a 4850 in crossfire "bottleneck" my 2.7ghz amd athlon 64 x2?
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#2
james_8970

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bottlenecking is when the power of a pc component is limiting something else.

Exactly.

second would a 4870 and a 4850 in crossfire "bottleneck" my 2.7ghz amd athlon 64 x2?

Close. It's be the other way around in the sense that your CPU will bottleneck your GPUs. Essentially what will happen is that your GPUs would have an overwhelming amount of processing power and the CPU cannot keep up with the data, so the GPUs will not be able to achieve their maximum performance as they'd be sitting at idle waiting for further information from the CPU. It'd be like a 4 lanes highway suddenly shrinking to 1 lane. While the cars we moving at an efficient rate when there was 4 lanes, once the road shrunk to 1 lane, the infrastructure wouldn't be large enough to support its needs.
James

Edited by james_8970, 29 July 2008 - 08:42 PM.

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#3
ryang96

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thanks james, :) , so should i get just one 4850 or something? :)
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#4
james_8970

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One HD4850 will likely still be held back by your CPU at stock frequencies, but not nearly as much as a crossfire configuration.
James
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#5
ryang96

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thanks alot, your a real savior ill just go for one 4850, even if it will still be held back, or if there is a better card i could get please suggest it to me, (i'm an ati guy)
:) + :) = :)

Edited by ryang96, 30 July 2008 - 03:41 PM.

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#6
james_8970

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In your case, I'd suggest purchasing a 8800GT.
James

Edit: If you are a ATI guy, then the HD4850 is your best bet. The HD3870 also wouldn't be a bad buy, considering it can be had for 40$ less (though it does performs a fair amount worse).

Edited by james_8970, 30 July 2008 - 04:50 PM.

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#7
ryang96

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ok, thank you much for all of your help =)

Edited by ryang96, 30 July 2008 - 07:25 PM.

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#8
james_8970

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Not a problem, glade I could be of service :)
James
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#9
ryang96

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wait a second i can sacrifice ati although i'm looking for performance so i have a couple cards in mind..

xfx 9600gtXXX http://www.newegg.co...N82E16814150306
xfx 8800gtXXX http://www.newegg.co...N82E16814150254
3870 overclocked http://www.newegg.co...N82E16814103050
4850 http://www.newegg.co...N82E16814121253
.....why is the 2900xt so expensive???
evga 9800gtx+ http://www.newegg.co...N82E16814130376
evga 9800gt http://www.newegg.co...N82E16814130380
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#10
kamille316

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I suggest not going with those ones that says XXX or overclocked because the price are usually more expensive because the company overclocks the card for you and it'll be more cost effective to buy it stock and overclock it yourself.

From all those cards you suggested, I'd probably go with the 4850 or the 9800GTX+ because:
Performance wise, it will be something like this 9600GT < HD3870 < 8800GT = 9800GT < 4850 < 9800GTX+
But it will all depend on what resolution you will game at because some high end cards shine only in higher resolution so it wouldn't benefit someone to buy a high end card (like the 9800GTX+) if they're only gaming at 1024X768.

For the 2900XT, I believe its because its old technology and at the time it was mainstream, the original price is too high and the store doesn't want to lose money on it by decreasing the price (since they paid a lot on it, they can't just reduce the price as in some cases, there will be someone that would need this card and would pay that premium).

Kamille
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#11
ryang96

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oh, i get the $400 price tag on the 2900xt now, thanks

also i game at a 22" resolution 1680X1050

from your chart i understand the gtx+ is best so i wil get that.
but if you know of a card that will be better in my system could you tell me?

thanks, ryang96 :)

Edited by ryang96, 31 July 2008 - 11:14 AM.

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