The AMD Kabini Review: A4-5000 APU Tested

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jpiniero

Lifer
Oct 1, 2010
14,839
5,456
136
The Xbox One is jaguar cores, unfortunately.

Now that I think about it, Jaguar is pretty much the best CPU out there that Sony/MS could have used for a console. It'd be terrible for PC gaming since you need more ST CPU power to overcome the huge overhead; but on a console that's not a problem. It's a balance between low power and performance. The low TDP of the cores lets you use the budget on what you really want - GPU power.
 

Enigmoid

Platinum Member
Sep 27, 2012
2,907
31
91
The most important measurement must be idle. There is near a 3x reduction on consumption. Wow!

Again, something is gravely wrong with that chart. A i7 quad + SCREEN idles at a similar power usage (often lower).

Hell, many notebooks browse the internet + Screen at that level of power consumption (typical craptop with 48 watt hour battery can get about 3 hours browsing 48/3=16 watts for light load and screen).
 

NTMBK

Lifer
Nov 14, 2011
10,269
5,134
136
Porting a CPU layout from a foundry process to another one
is not , or rather wasnt , economicaly viable because you ll
had to redesign the complete circuit in function of the new
process transistors caracteristics but if they managed to do
so with Jaguar means that their computerized tools are very
advanced and work well so they ll need far less workforce
for implementing their future designs.

AMD were shouting from the rooftops about how much effort had gone into making Jaguar easily portable.





("Macros" refers to portions of the design which will have to be hand ported, i.e. are not done with automated layout tools.)

http://semiaccurate.com/2012/08/28/amd-let-the-new-cat-out-of-the-bag-with-the-jaguar-core/

They're trying to make it more like an ARM core- easy to port to multiple different fabs. It's part of their push into "semicustom", trying to make it as easy as possible to produce a part that their customer wants.

It also makes sense for consoles, big time- traditionally, console chips will go through multiple die shrinks over their lifetime to reduce overall costs (smaller die, smaller power supply, smaller cooling systems) so a design which is easy to port to new processes is very attractive to MS and Sony.


EDIT: Also, don't forget that they supposedly had a port of Bobcat to GloFo's 28nm process finished and ready to go ("Wichita"), but that product got canned due to GloFo's 28nm delays.
 
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monstercameron

Diamond Member
Feb 12, 2013
3,818
1
0
Again, something is gravely wrong with that chart. A i7 quad + SCREEN idles at a similar power usage (often lower).

Hell, many notebooks browse the internet + Screen at that level of power consumption (typical craptop with 48 watt hour battery can get about 3 hours browsing 48/3=16 watts for light load and screen).

then I would assume Something is wrong with your testing methodology then...notebook check doesn't have many notebooks with idle less that 4w...
 

NTMBK

Lifer
Nov 14, 2011
10,269
5,134
136
And looking back on AMDs product mix, their mobile bobcat shipments are dropping fast. But again, so is everything they make.

I'm not surprised that Bobcat is dropping fast- it's a really old chip now! It's 40nm in a 28nm/22nm world. AMD really got screwed by Global Foundries delaying their 28nm, as it killed off their 28nm Bobcat shrink and forced them to try to get by on rebranded Bobcat chips (the E2 and Z60).
 

Enigmoid

Platinum Member
Sep 27, 2012
2,907
31
91
then I would assume Something is wrong with your testing methodology then...notebook check doesn't have many notebooks with idle less that 4w...

Notebookcheck measures with the screen.





Its quite good power wise but 2w is a fairly small difference (but still quite noticeable). Note the difference as a % of the whole will become smaller in real life because this test is without the screen.

http://www.notebookcheck.net/Review-Update-Dell-Latitude-6430u-HD-Ultrabook.92936.0.html

Newest review on notebookcheck with an i5 ULV.

Power consumption idle.
(note that notebook idle powers are idle/office work,etc./internet).

7.8/10.9/12.2
 

monstercameron

Diamond Member
Feb 12, 2013
3,818
1
0
Notebookcheck measures with the screen.





Its quite good power wise but 2w is a fairly small difference (but still quite noticeable). Note the difference as a % of the whole will become smaller in real life because this test is without the screen.

http://www.notebookcheck.net/Review-Update-Dell-Latitude-6430u-HD-Ultrabook.92936.0.html

Newest review on notebookcheck with an i5 ULV.

Power consumption idle.
(note that notebook idle powers are idle/office work,etc./internet).

7.8/10.9/12.2

I thought we were talking about your i7 idle...but even though normal workloads are on average 2w less, at max load is up to 15w less for kabini - 26w vs. 35w. If they had the same power envelope then maybe the performance would be more competitive with i3 at the list.
 

Enigmoid

Platinum Member
Sep 27, 2012
2,907
31
91
I thought we were talking about your i7 idle...but even though normal workloads are on average 2w less, at max load is up to 15w less for kabini - 26w vs. 35w. If they had the same power envelope then maybe the performance would be more competitive with i3 at the list.

Sorry, i meant my i7 idle compared to the E-350 idle of ~14 watts without the screen.
 

strata8

Member
Mar 5, 2013
135
0
76
Notebookcheck measures with the screen.





Its quite good power wise but 2w is a fairly small difference (but still quite noticeable). Note the difference as a % of the whole will become smaller in real life because this test is without the screen.

http://www.notebookcheck.net/Review-Update-Dell-Latitude-6430u-HD-Ultrabook.92936.0.html

Newest review on notebookcheck with an i5 ULV.

Power consumption idle.
(note that notebook idle powers are idle/office work,etc./internet).

7.8/10.9/12.2

Looking back on this graph:


And AnandTech's results:


You have web browsing using more than double the power than it uses during idle and video playback using the same amount of power as loading all CPU cores at the same time. I don't know if that's par for the course but it seems pretty strange to me.
 
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Phynaz

Lifer
Mar 13, 2006
10,140
819
126
It can be found in a PDF that was released at time
of bobcat launch with estimations of segments future evolution.

The paper clearly show the 200-500$ segment as being
the faster growing and targeted one.




http://www.amd.com/us/press-releases/Pages/amd-fin-analyst-day-2010nov09.aspx

Lol, a 2 year old marketing slide of estimated projections is your proof!?!

I know english isn't your native language, so let me help you here http://dictionary.reference.com/browse/proof?s=t
 

Abwx

Lifer
Apr 2, 2011
11,167
3,862
136
Lol, a 2 year old marketing slide of estimated projections is your proof!?!

I know english isn't your native language, so let me help you here http://dictionary.reference.com/browse/proof?s=t
No need to be fluent in english to understand that
you are of bad faith and willingly changing the subject
with your ridiculous link.

You think that dedicated Socs can be develloped in 6 months ,
that such a company follow three months raodmaps..?..

You original question , though, :

You are saying AMD is limiting themselves to a max price target of $600.

Do you have proof of any of this?
 
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strata8

Member
Mar 5, 2013
135
0
76
Not really relevant the x202e notebook they tested has horrible throttling problems (like 1.2 ghz core and 300-500 mhz igp under load). Difference in performance should really only be around 20% at most.

Toms review on the same or similar cpu (i3 ULV possibly different model--100 mhz difference)


Note that in that review TomsHardware swapped out the supplied 1600 memory for 2 x 1333. So both results should be taken with a grain of salt.

Best to compare Kabini at its best (1600 single channel) to i3 at its best (dual channel), where you get 30 fps for Kabini and 40 fps for the i3. Not too bad.
 

SPBHM

Diamond Member
Sep 12, 2012
5,058
410
126
Its quite good power wise but 2w is a fairly small difference (but still quite noticeable). Note the difference as a % of the whole will become smaller in real life because this test is without the screen.

it can be much higher, the peak power usage for the i3 is much higher, like running prime and furmark, and I think that can have a good effect on the design, it's probably cheaper to build around a system with the worst case scenario at 25w, not 40w



power efficiency here looks interesting.



Best to compare Kabini at its best (1600 single channel) to i3 at its best (dual channel), where you get 30 fps for Kabini and 40 fps for the i3. Not too bad.

Kabini would gain 15%, and the i3 would gain nothing?

i3 at its best = 1600 dual, tom used 1333 dual, so the i3 would also see a small increase, I would think, still both could the faster memory, and that's it, normally a memory bottleneck will benefit more the slower chip for a comparison.
but also I suppose Kabini is more starved for bandwidth considering it's only 64bit.

at least Tom's Hardware used the same software, memory and Hard Drive... a much better review than the other,
 

strata8

Member
Mar 5, 2013
135
0
76
Kabini would gain 15%, and the i3 would gain nothing?

i3 at its best = 1600 dual, tom used 1333 dual, so the i3 would also see a small increase, I would think, still both could the faster memory, and that's it, normally a memory bottleneck will benefit more the slower chip for a comparison.
but also I suppose Kabini is more starved for bandwidth considering it's only 64bit.

at least Tom's Hardware used the same software, memory and Hard Drive... a much better review than the other,

The i5 tested in the review had dual 1600 and got to 44 fps. Would the GPU performance of the i3 and i5 be the same under ideal conditions?
 

SPBHM

Diamond Member
Sep 12, 2012
5,058
410
126
The i5 tested in the review had dual 1600 and got to 44 fps. Would the GPU performance of the i3 and i5 be the same under ideal conditions?

IGP is eactly the same, same base clock and Turbo...

the differece is the CPU clock,
the i3 is locked at 1.8GHz under load,
the i5 can go as high as 2.6GHz for ST, but also as low as 1.7GHz (but it's probably higher than that running Skyrim),

so, at the same clock I think performance would be the same, if it's GPU limited.

but in reality I don't know, they use different laptops, cooling can be a factor...
also perhaps that i5 is a better die, can work at lower temps/voltage and keep the GPU at a higher state more easily, but I think cooling would be a bigger factor.
 
Aug 11, 2008
10,451
642
126
Now that I think about it, Jaguar is pretty much the best CPU out there that Sony/MS could have used for a console. It'd be terrible for PC gaming since you need more ST CPU power to overcome the huge overhead; but on a console that's not a problem. It's a balance between low power and performance. The low TDP of the cores lets you use the budget on what you really want - GPU power.

Not to mention low cost as well. Basically they used the cheapest lowest power cpu they could get away with and devoted as many resources as possible to the gpu. Keeps the cost and power usage down, so it makes sense in a console.
 

NTMBK

Lifer
Nov 14, 2011
10,269
5,134
136
Not to mention low cost as well. Basically they used the cheapest lowest power cpu they could get away with and devoted as many resources as possible to the gpu.

Not just lowest cost- lowest power usage, too. From the reviews of Kabini it looks like Jaguar has excellent efficiency, letting them use more of their (very strict) TDP budget for graphics performance.
 

strata8

Member
Mar 5, 2013
135
0
76
Not just lowest cost- lowest power usage, too. From the reviews of Kabini it looks like Jaguar has excellent efficiency, letting them use more of their (very strict) TDP budget for graphics performance.

It was a combination of three things - low cost, performance per watt, and general performance.

ARM can beat Jaguar at cost and performance per watt, but not in general performance (at 2Ghz Jaguar is faster than any ARM CPU AFAIK).

Intel can beat Jaguar at performance per watt (possibly) and general performance, but not at a low cost.
 

Phynaz

Lifer
Mar 13, 2006
10,140
819
126
No need to be fluent in english to understand that
you are of bad faith and willingly changing the subject
with your ridiculous link.

You think that dedicated Socs can be develloped in 6 months ,
that such a company follow three months raodmaps..?..

You original question , though, :

What? When did I say anything about socs being developed?

Still awaiting proof that AMD is limiting themselves to the under $600 market.
 
Aug 11, 2008
10,451
642
126
It was a combination of three things - low cost, performance per watt, and general performance.

ARM can beat Jaguar at cost and performance per watt, but not in general performance (at 2Ghz Jaguar is faster than any ARM CPU AFAIK).

Intel can beat Jaguar at performance per watt (possibly) and general performance, but not at a low cost.

Also a factor is that they would have had to use a discrete gpu with Intel, which ultimately could have given better performance, but at higher cost and power and the inconvenience of dealing with 2 separate companies that are both rather challenging to negotiate with.
 

NTMBK

Lifer
Nov 14, 2011
10,269
5,134
136
Also a factor is that they would have had to use a discrete gpu with Intel, which ultimately could have given better performance, but at higher cost and power and the inconvenience of dealing with 2 separate companies that are both rather challenging to negotiate with.

Not necessarily. Intel has the building blocks for an iGPU, they would just need to make a larger chip with more duplicates of the same EUs and with a faster memory bus. Double the number of EUs from Haswell GT3e, add GDDR5 (with their experience from the Xeon Phi), and you've got a console part. Intel could have made the part if they wanted to, but I imagine that they wouldn't accept a price which the console makers would be happy with.
 

galego

Golden Member
Apr 10, 2013
1,091
0
0
Not necessarily. Intel has the building blocks for an iGPU, they would just need to make a larger chip with more duplicates of the same EUs and with a faster memory bus. Double the number of EUs from Haswell GT3e, add GDDR5 (with their experience from the Xeon Phi), and you've got a console part. Intel could have made the part if they wanted to, but I imagine that they wouldn't accept a price which the console makers would be happy with.

Resume: AMD had both the technology and the price. Intel has none.
 
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