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Question about bottlenecking

post #1 of 10
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I currently have a 260gtx and am upgrading to a 480gtx cuz a friend of mine will sell it to me for $150. I have a Phenom II 920 2.8ghz cpu, and my question is... Will I have problems with bottlenecking? I can OC the CPU to 3.4ghz with no problem.
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post #2 of 10
try about 3.8GHz on the CPU, and you will experience less of a bottleneck. But a 480 will be restricted by that.
    
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post #3 of 10
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Also, will my OCZ ModXStream Pro 600w be able to power my evga 480gtx sc?
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post #4 of 10
Quote:
Originally Posted by CpHaAiOnS View Post
Also, will my OCZ ModXStream Pro 600w be able to power my evga 480gtx sc?
yes
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post #5 of 10
The answer depends on how you personally would define 'bottlenecking', and how significant the BN'ing would have to be for you to consider it 'a problem'.

You will definitely lose a few FPS vs. someone with, say, a Sandy Bridge at 5.0GHz, on certain more-cpu-dependent games or benches, depending on the settings at which you run them. The lower the settings (i.e. lower res/AA, etc) the more likely it will be that someone with a more powerful CPU than you would get a higher FPS.

What I'm getting at here is that bottlenecking is not simply a function of looking at the hardware. In order for there to be a BN, software must be running on that hardware. The frequency and severity of any BN is dictated by the hardware + the software. Ergo, this question can't be answered "yes" or "no" without your stipulating what test you're running (i.e. what game/bench) and what settings you'll be running it at.

Generally-speaking, you won't have any problematic bottlenecks w/that setup though
Edited by brettjv - 5/6/11 at 4:13pm
    
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post #6 of 10
Quote:
Originally Posted by brettjv View Post
The answer depends on how you personally would define 'bottlenecking', and how significant the BN'ing would have to be for you to consider it 'a problem'.

You will definitely lose a few FPS vs. someone with, say, a Sandy Bridge at 5.0GHz, on certain more-cpu-dependent games or benches, depending on the settings at which you run them. The lower the settings (i.e. lower res/AA, etc) the more likely it will be that someone with a more powerful CPU than you would get a higher FPS.

What I'm getting at here is that bottlenecking is not simply a function of looking at the hardware. In order for there to be a BN, software must be running on that hardware. The frequency and severity of any BN is dictated by the hardware + the software. Ergo, this question can't be answered "yes" or "no" without your stipulating what test you're running (i.e. what game/bench) and what settings you'll be running it at.

Generally-speaking, you won't have any problematic bottlenecks w/that setup though
can't be said anymore clear than that.
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post #7 of 10
Let me make 2 assumptions:-
1. you play at either 1920x1080 or 1680x1050, judging from the 2 displays in your sig rig.
2. your Phenom II x4 920 (2.8GHz to 3.4GHz) performs similar to a Phenom II x4 955 at the same frequency.

With these 2 assumptions made, the following review shows CPU scaling (including Phenom II x4 955) for GTX480 at 3 frequencies (ie 2.6, 3.2 and 3.8GHz). You can go through the graphs for 1920x1200 and 1680x1050.

Link: http://alienbabeltech.com/main/core-...analysis/all/1

My conclusion
: for the 20 game benchmarks tested, bottleneck does exist for some games but is practically irrelevant (ie the fps well passes 60fps). And for many games, it does not exist when the frequency is at 3.2GHz, except perhaps one game. So, if you overclock your Phenom II to 3.4GHz, you will be in a fine position.
Edited by windfire - 5/6/11 at 5:01pm
post #8 of 10
Thread Starter 
So basically... I'll be one of the rare breads running a 480 gtx with some of the lowest end gear, lol!

But.. Good news is I only paid 400 for all of it after I buy the 480 off a friend. I'd say that is a definite win!

...I might even have to get a full size case for fun... The 480's barely gonna fit.
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post #9 of 10
Quote:
Originally Posted by brettjv View Post
The answer depends on how you personally would define 'bottlenecking', and how significant the BN'ing would have to be for you to consider it 'a problem'.

You will definitely lose a few FPS vs. someone with, say, a Sandy Bridge at 5.0GHz, on certain more-cpu-dependent games or benches, depending on the settings at which you run them. The lower the settings (i.e. lower res/AA, etc) the more likely it will be that someone with a more powerful CPU than you would get a higher FPS.

What I'm getting at here is that bottlenecking is not simply a function of looking at the hardware. In order for there to be a BN, software must be running on that hardware. The frequency and severity of any BN is dictated by the hardware + the software. Ergo, this question can't be answered "yes" or "no" without your stipulating what test you're running (i.e. what game/bench) and what settings you'll be running it at.

Generally-speaking, you won't have any problematic bottlenecks w/that setup though
Well said, I came in here to say something similar to that

As an example, because all I do on my sig rig is browse the web and fold, I don't encounter a GPU bottleneck (unless my CPU is at 100% usage doing something else, like youtube vids). Bottlenecking is dependant on what you're doing with your system

Edit: just saw the OP's post above mine. Did someone say "lowest end gear?"
Edited by Mike-IRL - 5/7/11 at 5:25pm
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post #10 of 10
Quote:
Originally Posted by CpHaAiOnS View Post
So basically... I'll be one of the rare breads running a 480 gtx with some of the lowest end gear, lol!
Not at all. With your CPU OC'ed to ~3.4, that is similar to a slightly OC'ed 955, which many people run with high end cards
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