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[How To] Identifying a Bottleneck.

post #1 of 16
Thread Starter 
how to identify a bottleneck.

341

can you tell which is the bottleneck!!??

this is on my sig rig.(disregard max temps was custom blending Prime95 last night)

playing crysis 2 at advanced @1600X900. incredibly playable FPS (will get fraps on it in a min and benchmark)



heres a how to:

load up
MSI afterburner or
EVGA Precision
task manager(CTRL+ALT+Del/right click taskbar) then click over to performance tab
real temps cos your so cool.

then play a game any it doesn't really matter which but something like crysis/metro 2033/BF3 etc

recommend doing it with a few games as some are more CPU intensive. ie GTA4

then start playing get into a nice big fire fight with lots of 'splosions then afterwards take a peek at usage on msi vs task manager

if gpu @100% and cpu virtually idling then GPU is bottleneck!(like mine)

if CPU flat out 100%ish then time for OC or new CPU.


just a headsup,

(its more for newbs tbh)

will update on FPS with fraps on in a min,

(mines an extreme example as im waiting for the 6xx Nvidia/7990 cards)

peace.
post #2 of 16
log FPS....
post #3 of 16
Thread Starter 
Quote:
Originally Posted by PontiacGTX View Post

log FPS....

woops forgot about that.

gimme a minute ill log the FPS.

Frames, Time (ms), Min, Max, Avg
15610, 300000, 0, 921, 52.033


hope that helps its from the section where theres a tank up on a hill that you blow up.

(for average users thats a fraps benchmark readout, (frames =total number of frames over time,
time=length of bench (in this case its 300seconds,
min FPS max FPS average FPS,
min was 0 as i had game paused. max fps 921fps and average was 52.033.
(fps =frames per second. (higher is better)
Edited by Big-Pete - 2/2/12 at 7:01pm
post #4 of 16
Quote:
Originally Posted by Big-Pete View Post

.
if gpu @100% and cpu virtually idling then GPU is bottleneck!(like mine)

I don't really agree with calling a GPU a "Bottleneck", it is not holding back another component, unlike where if your CPU was at %100 preventing your GPU from running that would be a bottleneck.

When the GPU is at %100, it is just at its full potential.
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post #5 of 16
Thread Starter 
Quote:
Originally Posted by Hellish View Post

I don't really agree with calling a GPU a "Bottleneck", it is not holding back another component, unlike where if your CPU was at %100 preventing your GPU from running that would be a bottleneck.
When the GPU is at %100, it is just at its full potential.

please show me a pic of a CPU bottlenecking a GPU. i know its possible but ive never seen it before, normally its the graphics card that runs out of steam before the cpu.
post #6 of 16
Quote:
Originally Posted by Big-Pete View Post

please show me a pic of a CPU bottlenecking a GPU. i know its possible but ive never seen it before, normally its the graphics card that runs out of steam before the cpu.

WHAT?>!!?!

How does this even relate to the statement I just made, and you already know it is possible, and it consistently does happen in Tri/Quad CF/SLI Setups,

either way, I am done here.
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post #7 of 16
Thread Starter 
Quote:
Originally Posted by Hellish View Post

WHAT?>!!?!
How does this even relate to the statement I just made, and you already know it is possible, and it consistently does happen in Tri/Quad CF/SLI Setups,
either way, I am done here.

sorry having a proper derp moment completely forgot about CF and Sli, been up 36hours straight not good for brain. must sleepz

ignore previous statement im going to bed.
post #8 of 16
Quote:
Originally Posted by Big-Pete View Post

please show me a pic of a CPU bottlenecking a GPU. i know its possible but ive never seen it before, normally its the graphics card that runs out of steam before the cpu.

I'll show you one later when I play BF3. 5870CF bottlenecks my 4ghz Phenom II quad, though not by much. You only see CPU bottlenecks when you start crossfiring/SLIing 2 higher-end cards together, especially on older CPUs.
    
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post #9 of 16

Trust me it is bottlenecking it by a good margin. Put that on a decent processor and you will see what I mean. My Q6600 @ 3.72 465x8 bottlenecked my GPU quite badly.

 
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post #10 of 16
Quote:
Originally Posted by Lord Xeb View Post

Trust me it is bottlenecking it by a good margin. Put that on a decent processor and you will see what I mean. My Q6600 @ 3.72 465x8 bottlenecked my GPU quite badly.

I get 85%-90% usage for both cards, so I don't consider it a big bottleneck, unless you weren't directing that at me.
    
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