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Will i have bottleneck?

Last response: in Graphics & Displays
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June 25, 2011 8:47:28 PM

hey, i currently have

e8400 @ 3.6ghz
4gm ram
gts 250

i just ordered a sapphire 6950 and will my cpu bottleneck it alot? im on stock cooler so not risking going above 3.6ghz

More about : bottleneck

June 25, 2011 9:30:08 PM

If I'm not mistaken that is a dual core CPU, correct? And you neglected to list what type of RAM and what it's clocked at.
June 25, 2011 9:32:01 PM

Salty crackers said:
If I'm not mistaken that is a dual core CPU, correct? And you neglected to list what type of RAM and what it's clocked at.


yes dual core @ 3.6ghz, il check the ram im not sure on that, anyway i can check without opening case?
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a b U Graphics card
June 25, 2011 10:22:50 PM

Yes, by quite a bit (But you can always throw the 6950 in a later machine)... If it was an i3 dual core, then you would be fine, but the e8400 is an older, slower dual core...

I LOVE G. Skill RAM. They are cheap, reliable, most units have lower voltage ratings, and they overclock nice. I have a 2x2GB set in my machine, planning on bringing it up to 2x2x2x2GB with the same stuff :) .

BUT!! It will NOT be compatible with your mobo if you really have DDR2 right now as you linked it to a DDR3 set. And if your a pre-built machine (Dell/HP/Ect) the motherboards are picky about what size and frequency your RAM is.

Plus, depending on what you do, the difference between 4GB and 8GB of RAM would be small to negligible (Unless you video edit, or game at a crazy rez).
June 25, 2011 10:25:43 PM

gidgiddonihah said:
Yes, by quite a bit (But you can always throw the 6950 in a later machine)... If it was an i3 dual core, then you would be fine, but the e8400 is an older, slower dual core...



ok cheers, im building a whole new pc (i5 2500k, ddr3 ram, z68 motherboard) in about 2 months, but i cannot wait that long (gts 250 is dying) so i just got the 6950 for now :p 
ill put it in the new machine when i get it and get another because the xfire scaling goes up to 100% :o 

:hello: 
a b U Graphics card
June 25, 2011 10:39:37 PM

Cool :)  I just built a machine a few months ago. I'm already planning on scrapping most of it :lol:  and getting a Bulldozer 6970 Crossfire setup with my GTX 460 as a Physx/CUDA card.

Windows 7 Home Premium
Athlon II X3 445 (Unlocked to Phenom II x4 B45)
MSI 870-G45
4GB G. Skill 1600 DDR3 RAM
GTX 460 @815/1000/1630
a c 147 U Graphics card
June 26, 2011 12:36:21 AM

Checking for CPU bottlenecks:

NOTE: every game uses a different amount of the CPU even if it uses 100% of the graphics card. Also, you may not be able to use 100% of the CPU's cores depending on how the game was written (remember when you could only use a single core even if you had a dual-core CPU?)

On to it...

1. Open the Task Manager (CTRL-ALT-DEL)
2. set Task manager to View all the cores (not the average)
3. update view speed to LOW
4. leave TM running, then open a video game and play for at least FIVE minutes
5. Close the game and look at the Task Manager

Analysis:
- under "Performance" observe that you show all the core graphs
- if NO cores reach 100% your CPU is not the bottleneck (you can also see how close you come)
- in a multi-core CPU, a single core at 100% does not guarantee a bottleneck (it's probable in a dual-core only possible in a quad-core)
- if TWO of the cores in a CPU are at 100% it's pretty certain that your CPU is the bottleneck

*REPEAT this process for several video games and see if your CPU is bottlenecked. If you owned 20 games and 10 were bottlenecked by the CPU and 10 were not (graphics bottlenecked) this is what's called a perfectly balanced system (for the processing part).

I suspect you'll find some games that are not CPU bottlenecked and most that are.

OTHER:
VSYNC - if VSYNC is not enabled then the game creates frames until either the CPU or the graphics card are bottlenecked, even if the frame rates are higher than what the monitor can handle. You may have difficulty going above 60FPS anyway.

HYPERTHREADING - a quad-core CPU with HT enabled shows eight individual graphs under "Performance" in Task Manager. Many games don't use these hyperthreads (the 2nd, 4th, 6th and 8th graph. Graph #1 is the first physical core, called Core0 and it's hyperthread is graph#2 called Core1.)

Hyperthreads are also averaged for the total CPU average which is part of the reason analyzing just the average CPU graph is useless. Even if your CPU uses 100% of all it's physical cores, it's average would only show 50% usage even though the game isn't even using those hyper threads. Additionally the hyper threads can't process at the same level of the core (max of about 30% of the physical core).

What is a hyperthread?
A way of processing some data in parallel through a physical core. It's not a separate physical entity, it's the same core processing another set of instructions at the same time (roughly).

SUMMARY:
You can use the Task Manager to see if your CPU is the bottleneck when playing games. No cores at 100% means no CPU bottleneck. One means possible bottleneck, and two means almost certain bottleneck at the CPU.
!