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[Tom's Hardware] FX Vs. Core i7: Exploring CPU Bottlenecks And AMD CrossFire

post #1 of 595
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Source



Test setup :
3770K vs FX 8350 at stock and at 4.4Ghz
7970 CFX at 1010mhz/5500mhz
DDR3-2200 CAS 9-11-9-36 1.65 V
Z77 & 990FX Sabertooth
760W Seasonic Gold SPU

Skyrim Ultra

vs

BF3 Ultra


The Real FX-8350 bottleneck:


I am a bit disappointed Tom didn't include a i5-3570K in this test.
Edited by sherlock - 1/24/13 at 5:37pm
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post #2 of 595
TH on trying to figure out an unbiased way to calculate value:
Quote:
The only way we can make AMD's FX-8350 look like a better gaming value than Intel's Core i7-3770K (specifically in the games and at the settings we used to test) is if the rest of the system is free. Because the rest of the system is never free, the FX-8350 never serves up better high-end gaming value.
WRONG! SO WRONG!
Firstly: The majority of the system does not affect gaming performance even slightly, and thus should not be included in a performance/value calculation
Secondly: Assuming that the rest of the system is the same for everything except cpu/mobo, all they are doing is increasing the total cost used for the calculation. Which thereby creates a bias in favor of the more expensive cpu.

An unbiased value comparison should only include cpu/mobo. Because those two things can be thought of as a single unit (one doesn't work without the other), and it is not a comparison of any other part of the system, only those two things...
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post #3 of 595
They couldn't believe Logan review, now they wont believe Toms review.

Intel gunner.gif <--AMD
post #4 of 595
I don't see how comparing a $330 CPU to a $200 CPU is fair. Also, almost every instance they showed was CPU/thread bound in some way, which means there wasn't a hope in hell of the FX 8350 getting to use all 8 of its cores. Couple that with the fact that the i7 3770k already has 8 threads feeding 4 cores, and you get a "duh" moment with this article: Of course the 3770k won. Did anyone actually believe something else was going to happen?

I maintain that in the future, the FX-8350 will end up being the better CPU. As of now, the i5 3570k and i7 3770k are faster on lightly threaded apps, which is the majority of programs on the market today. Even fewer games are heavily multi-threaded. So why did Tom's even put in the effort of telling us something that we already know? rolleyes.gif
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post #5 of 595
just another example that shows the fx 8350 is more than enough for gaming, and it holds the best bang for the buck for a gaming pc.
post #6 of 595
Having only glanced at the posted content (The op) I really don't see the FX 83xx being that far behind the core ix 3xxx
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post #7 of 595
Quote:
Originally Posted by wedge View Post

TH on trying to figure out an unbiased way to calculate value:
WRONG! SO WRONG!
Firstly: The majority of the system does not affect gaming performance even slightly, and thus should not be included in a performance/value calculation
Secondly: Assuming that the rest of the system is the same for everything except cpu/mobo, all they are doing is increasing the total cost used for the calculation. Which thereby creates a bias in favor of the more expensive cpu.

An unbiased value comparison should only include cpu/mobo. Because those two things can be thought of as a single unit (one doesn't work without the other), and it is not a comparison of any other part of the system, only those two things...

Maybe you should try reading this whole page:

http://www.tomshardware.com/reviews/fx-8350-core-i7-3770k-gaming-bottleneck,3407-9.html

Then you can realize the author talks about the very thing you mention, and gives various "value" metrics....rolleyes.gif




I agree with the author, you're going to be buying a whole system. Your percentages of mobo/cpu are flawed because unless you're using integrated graphics, you can't game w/ only mobo an cpu!! It's like quibbling over the cost difference in an $80,000 BMW and an $81,000 Mercedes. If you can get an extra 15% of performance for what ends up being 10% increase in cost of the total system, that should NOT BE IGNORED!


Edited by Foolsmasher - 1/24/13 at 7:22am
post #8 of 595
Great read! Was pretty surprised at how the 8350 kept up in a few of the games, but the i7 trounced it in a couple. Should be interesting to see what AMD brings to the fight next.
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post #9 of 595
Quote:
Originally Posted by Mad Pistol View Post

I don't see how comparing a $330 CPU to a $200 CPU is fair. Also, almost every instance they showed was CPU/thread bound in some way, which means there wasn't a hope in hell of the FX 8350 getting to use all 8 of its cores. Couple that with the fact that the i7 3770k already has 8 threads feeding 4 cores, and you get a "duh" moment with this article: Of course the 3770k won. Did anyone actually believe something else was going to happen?

I maintain that in the future, the FX-8350 will end up being the better CPU. As of now, the i5 3570k and i7 3770k are faster on lightly threaded apps, which is the majority of programs on the market today. Even fewer games are heavily multi-threaded. So why did Tom's even put in the effort of telling us something that we already know? rolleyes.gif

Doesn't BF3 use all 8 threads? As it stands the 8350 did pretty damn well and if it weren't for the absurd power usage I'd have no issues going back to AMD.
post #10 of 595
Well done AMD, I am impressed. But damn is that Power consumption high compared to Intel.
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