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Geekbench scores showing up for i5 + i7

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mark28

macrumors 68000
Jan 29, 2010
1,632
2
Geekbench = crap.

MBP scores higher than iMac's at Geekbench, yet in real world performance even the base $1200 iMac beats the high end $2500 MBP.
 
nebulos

nebulos

macrumors 6502a
Aug 27, 2010
555
0
mark28 said:
Geekbench = crap.

MBP scores higher than iMac's at Geekbench, yet in real world performance even the base $1200 iMac beats the high end $2500 MBP.
Click to expand...

some MBPs score higher than some iMacs. can you show us what real world performance you're referring to where the base iMac beats the high end MBP?
 
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mabovb

macrumors newbie
Jul 21, 2011
2
0
I know the different between 32 and 64bit, but are the two different models for both the 11" and 13"?

For instance a 32bit 11", 64bit 11", 32bit 13", 64bit 13"?

How do we tell at the store which one is which?
 
D

derlockere

macrumors member
Original poster
Jun 16, 2009
66
0
mabovb said:
I know the different between 32 and 64bit, but are the two different models for both the 11" and 13"?

For instance a 32bit 11", 64bit 11", 32bit 13", 64bit 13"?

How do we tell at the store which one is which?
Click to expand...

The 'bits' refer only to the mode the geekbench test was executed. the 32-bit geekbench test results in lower scores. In fact there is no difference in the Macbook Air models
 
nebulos

nebulos

macrumors 6502a
Aug 27, 2010
555
0
TB allows for short bursts of CPU power. what about steady CPU power?

my concern is that, while turboboosting seems to allow these CPUs to score very high on geekbench, the test only lasts a few seconds.

i don't know much about TB, but what i'm wondering is if we can expect steady CPU power when needed. for example, running audio software that taxes the CPU, will the CPU be able to keep TB up or does the heat eventually (if not quickly) force the CPU to clock back down?

... it's something i can look up, i know, and i will, but if you know and feel like answering, it might help the thread as well.
 
HiRez

HiRez

macrumors 603
Jan 6, 2004
6,265
2,630
Western US
You guys are killing me, I was going to wait and order later, but I really think I have to go down to the Apple Store after work now and pick one up. :mad:
 
T

tirerim

macrumors regular
Aug 4, 2006
204
0
nebulos said:
TB allows for short bursts of CPU power. what about steady CPU power?

my concern is that, while turboboosting seems to allow these CPUs to score very high on geekbench, the test only lasts a few seconds.

i don't know much about TB, but what i'm wondering is if we can expect steady CPU power when needed. for example, running audio software that taxes the CPU, will the CPU be able to keep TB up or does the heat eventually (if not quickly) force the CPU to clock back down?

... it's something i can look up, i know, and i will, but if you know and feel like answering, it might help the thread as well.
Click to expand...

As I understand it, TurboBoost has nothing to do with short bursts of power -- it disables one of the cores in order to divert more power to the other one and let it run faster. So you get one core at 2.3 GHz instead of two cores at 1.6 GHz, or whatever the numbers actually are. For non-parallel tasks, this is very useful, while for tasks that can make use of both cores the chip operates in normal mode and you get better speed that way. The chip doesn't use more power in either mode, though, so the heat should be the same.
 
K

KPOM

macrumors P6
Oct 23, 2010
18,311
8,326
tirerim said:
As I understand it, TurboBoost has nothing to do with short bursts of power -- it disables one of the cores in order to divert more power to the other one and let it run faster. So you get one core at 2.3 GHz instead of two cores at 1.6 GHz, or whatever the numbers actually are. For non-parallel tasks, this is very useful, while for tasks that can make use of both cores the chip operates in normal mode and you get better speed that way. The chip doesn't use more power in either mode, though, so the heat should be the same.
Click to expand...

There is also a Turbo Boost feature that works with 2 cores. It doesn't boost as high, but it does boost. I'm not sure when and how that works.
 
M

MrMacAir

macrumors newbie
Jul 21, 2011
1
0
Turbo and Hyperthreading

The new MacAirs do NOT have either Turbo or Hyper as Apple has disabled both which makes the tests impressive. You can check their store and note they do not show it on the tech specs. Probably, it is a heat issue. Also, I assume you are aware the camera is not HD.

Do you feel the i7 results justify the additional $100 for the 13"?
 
nebulos

nebulos

macrumors 6502a
Aug 27, 2010
555
0
MrMacAir said:
The new MacAirs do NOT have either Turbo or Hyper as Apple has disabled both which makes the tests impressive. You can check their store and note they do not show it on the tech specs. Probably, it is a heat issue. Also, I assume you are aware the camera is not HD.

Do you feel the i7 results justify the additional $100 for the 13"?
Click to expand...

as far as i know, Apple does not list these features on their specs page, but that doesn't mean they were disabled. in fact, look at this thread:

MBA 13" 256 GB i7 - facts and figures - now with HyperThreading and TurboBoost
 
M

Mikael

macrumors regular
Aug 4, 2005
158
0
Gothenburg, Sweden
MrMacAir said:
The new MacAirs do NOT have either Turbo or Hyper as Apple has disabled both which makes the tests impressive. You can check their store and note they do not show it on the tech specs. Probably, it is a heat issue. Also, I assume you are aware the camera is not HD.
Click to expand...
Why do you write something completely baseless like this and phrase it like it's facts? It's not, the new Airs definitely have HyperThreading and all info I've seen so far indicates that turbo is working as well.
 
D

DavidC1

macrumors member
Jul 26, 2006
75
0
nebulos said:
TB allows for short bursts of CPU power. what about steady CPU power?
Click to expand...

There's a "Long boost" and a "Short boost". Though on the 17W chips, even the Long boosts are quite high.

Long Boost: lasts forever, or until emergency thermal limitations kick in, this is the typical clock speed you know
Short Boost: ~60 seconds

I'll just list the MBA 2011 ones

Core i5 2467M

Base: 1.6GHz
2C Short boost: 1.9GHz
2C Long boost: 2.0GHz
1C: 2.3GHz

Core i5 2557M

Base: 1.7GHz
2C Short boost: 2.3
2C Long boost: 2.4GHz
1C: 2.7GHz

Core i7 2677M
Base: 1.8GHz
2C Short boost: 2.5GHz
2C Long boost: 2.6GHz
1C: 2.9GHz

(2467M speeds are guesses for Long and Short)
 
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