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Windows 7: A question about Phenom II vs Core i7

30 May 2010   #11
stormy13
Microsoft MVP

Win 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by Mellon Head View Post
The i7 has eight virtual cores, the Phenom has 6.
One small correction. The i7 has 4 physical cores and 4 virtual cores (or 6 and 6 if you want to go to the i7 980x), the PII x6 has 6 physical cores.


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30 May 2010   #12
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot
 
 

Quote   Quote: Originally Posted by stormy13 View Post
Quote   Quote: Originally Posted by Mellon Head View Post
The i7 has eight virtual cores, the Phenom has 6.
One small correction. The i7 has 4 physical cores and 4 virtual cores (or 6 and 6 if you want to go to the i7 980x), the PII x6 has 6 physical cores.
Yes. Thank you for the correction. I often mistakenly lump the i7 cores together and think of them all as virtual when they are clearly not, as you've stated. I have edited my original post.
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30 May 2010   #13
bobkn

Windows 7 Pro X64 SP1
 
 

Quote   Quote: Originally Posted by Mellon Head View Post
Quote   Quote: Originally Posted by sygnus21 View Post
Now I'm sure someone who knows AMD can put something similiar together for you to consider.

My two cents.
The thing with the AMD system is, as mentioned, the cost of the motherboard is generally lower. The AM3 socket series uses dual channel DDR3 modules in a 2/4/8 configuration.

AMD has a slight advantage in the system complexity department, that being the memory controller is on the die of the Phenom, not on the motherboard, and it cuts down on the board's "real estate requirements". Less circuit traces and layers mean reduced cost of the board.
Intel went to the integrated memory controller for the Socket 1366/ core I7 CPUs. They support triple channel memory, but it's not mandatory. (Recommended, though.) The Socket 1156 CPUs have dual channel memory controllers.

A quick look at at www.newegg.com shows that there are some Socket 1156 motherboards that are cheaper than most AMD 790FX boards. (The X58 Socket 1366 boards are more expensive, starting at about $150.)

I'm almost glad that I didn't have all these choices at the time of my latest mainboard/CPU upgrade. Too complex.
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31 May 2010   #14
gjoellee

Windows 7 & Linux
 
 

You should also notice that the i7 processor has TurboBoost which overclocks it to up to 3,4GHz (or something like that), if more processing power is needed. You will feel quite a difference between the processors while multitasking...
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31 May 2010   #15
sygnus21

Windows 10 Pro
 
 

Actually that would depend on the processor as to how much for a given turbo increase.

Example: my i7-930 is stock clocked at 2.80GHz (133x21). With turbo mode enabled, the processor will reach a top speed of 2.93 (133x22) This is for a non-overclocked chip.

Now, and this is important to note - I can set my mutiplier to 22 (default is 21), and have the chip run at 2.93, instead of 2.80, but doing so will disable turbo mode and the chip will run no higher. Again, non-overclocked chip.

However, If I overclock, but keep the multiplier below 22, the chip will go into turbo mode. It's when the chip reaches its multi limit that turbo doesn't work. At least that's the way I understand it; and I'm not sure how high it will jump, for example, If I use a 20 multiplier, will turbo mode jump it to 22? Not sure about that.

FYI, the Extreme chip, i7-980x, does not have a locked multiplier so I'm not sure how Turbo mode works on it, but i'm pretty sure it does work.

My two cents
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31 May 2010   #16
kucing13

 

i thought they already release i9
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31 May 2010   #17
sygnus21

Windows 10 Pro
 
 

I don't think they have been released yet. Unless you want to classify the i7-980x as an i9 seeing that it's a six-core processor named "Gulftown"

Intel six core Gulftown named i7 980-X : Intel Processor Forum

Intel's Core i9 "Gulftown" Six-Core Processor Pictured | Maximum PC
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31 May 2010   #18
zzz2496

Windows7 Ultimate 64bit
 
 

Quote   Quote: Originally Posted by stormy13 View Post
Quote   Quote: Originally Posted by Mellon Head View Post
The i7 has eight virtual cores, the Phenom has 6.
One small correction. The i7 has 4 physical cores and 4 virtual cores (or 6 and 6 if you want to go to the i7 980x), the PII x6 has 6 physical cores.
Another small correction, i7 has 4 physical cores, this is correct. Each of these cores will handle one thread at normal operation mode. This translates as 4 cores in Windows Task manager. You are seeing all 4 physical cores in action in this mode.

Once you enabled Hyperthreading, each of these cores will be able to handle 2 threads each. In this mode, Windows Task manager will show 8 processor. All of these cores are all virtual cores, the physical got abstracted (hidden) behind the Hyperthreading. Technically, Mellon Head's argument is the right one. It's not like 4 cores accompanied by another 4 virtual cores... All 8 of them are virtual, every single one of them...

In some cases, Hyperthreading can increase performance. But one must note, that this is a technique to increase each core's typical workload, assuming you have a lot of threads running, Hyperthreading will help you stress each cores so that you can make your processor busier. But at come loads that really bog down a core, Hyperthreading rears it's ugly head, you'd get lower performance in Hyperthreading ON mode than in OFF mode.

zzz2496
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31 May 2010   #19
kucing13

 

Quote   Quote: Originally Posted by sygnus21 View Post
I don't think they have been released yet. Unless you want to classify the i7-980x as an i9 seeing that it's a six-core processor named "Gulftown"

Intel six core Gulftown named i7 980-X : Intel Processor Forum

Intel's Core i9 "Gulftown" Six-Core Processor Pictured | Maximum PC
That's it. Thanks for the wakeup call
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31 May 2010   #20
Fumz

7 Ultimate x64
 
 

Imho, if you're looking at an lga 1366 i7 or a 6 core Phenom, then you're already caught up in the hype.

Go for an 1156 i5, or if you really "need" hyper-threading, an 1156 i7. Stock they're great chips that are on par with Intel's best; a little overclocking and things start getting amazing.

Intel Core i7-975 EE and Core i5-750 in Contemporary Games - X-bit labs
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 A question about Phenom II vs Core i7




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