AMD Carizzo chips - any laptops with the 35W version?

[cebalrai]

I'm shopping around for an AMD laptop and from what I can tell almost all of them are throttled down to 15W. Info on TDP can be difficult to come by. From what I can tell Lenovo had a 35W model but that info comes from forum posts that are nearly one year old.

Does anyone know if there are 35W Carizzos out now? Or how I'd even search for them?

Many thanks in advance.

 

[jpiniero]

I think you are going to have a hard time. Most Intel laptops these days are 15W, so you figure any OEM wanting to do an AMD model would want to match that.

 

[monstercameron]

Nope.jpg. and i'd know

 

[Abwx]

The Lenovo Y700 has configurable TDP up to 35W and even 42W for short durations, although you could wait for a Bristol Ridge update of this laptop..

 

[coffeemonster]

As Abwx said, the first few Bristol Ridge laptops are coming out, I'd wait a bit. There are several 25-45w models https://en.wikipedia.org/wiki/List_...ssors#.22Bristol_Ridge.22_.282016.2C_28_nm.29
and they all support DDR4 2400

 

[monstercameron]

As Abwx said, the first few Bristol Ridge laptops are coming out, I'd wait a bit. There are several 25-45w models https://en.wikipedia.org/wiki/List_...ssors#.22Bristol_Ridge.22_.282016.2C_28_nm.29
and they all support DDR4 2400

I checked out the nice looking hp envy at bestbuy, single channel confirmed, its actually running at 933MHz(1866MHz effective) ddr4. Also the chassis was too thin for 20W+,so we are in for another round of crap...sigh.

 

[cebalrai]

As Abwx said, the first few Bristol Ridge laptops are coming out, I'd wait a bit. There are several 25-45w models https://en.wikipedia.org/wiki/List_...ssors#.22Bristol_Ridge.22_.282016.2C_28_nm.29
and they all support DDR4 2400

What's the difference of Bristol Ridge over Carizzo? DDR4 memory support and a bump in frequency?

Hmm, it says release is June 2016... Anyone see any of them on the market yet?

Edit: Here's one.

http://www.newegg.com/Product/Product.aspx?Item=N82E16834315445

How do I tell TDP, memory frequency, etc?

 

[jpiniero]

How do I tell TDP, memory frequency, etc?

Google the processor name, obviously. That one is 15W it looks.

 

[dark zero]

Seems that only Lenovo will deliver the high TDP again... in Intel AND AMD... those U crap ruined the performance laptop market T_T

 

[coffeemonster]

I checked out the nice looking hp envy at bestbuy, single channel confirmed, its actually running at 933MHz(1866MHz effective) ddr4. Also the chassis was too thin for 20W+,so we are in for another round of crap...sigh.

I think HP is the worst, I avoid them now at all costs. Hoping for a decent Asus or whatever becomes of the Sony/Toshiba alliance.
1866 DDR4? I wonder if it would run at rated speed if you swapped in some 2400 sticks. These things are hard to know before you buy :\

What's the difference of Bristol Ridge over Carizzo? DDR4 memory support and a bump in frequency?

Hmm, it says release is June 2016... Anyone see any of them on the market yet?

Bristol Ridge = Carrizo. Carrizo has DDR4 mem controller but none of the OEM boards it was on supported it. never was clear on that one.

here is the HP envy http://www.bestbuy.com/site/hp-envy...k-silver/5295100.p?id=bb5295100&skuId=5295100
it is a 1080p IPS screen at least

How do I tell TDP, memory frequency, etc?

the wikipedia link I posted lists TDPs. Also google processor name + cpu-world for a good spec sheet

 

[monstercameron]

What's the difference of Bristol Ridge over Carizzo? DDR4 memory support and a bump in frequency?

Hmm, it says release is June 2016... Anyone see any of them on the market yet?

Edit: Here's one.

http://www.newegg.com/Product/Product.aspx?Item=N82E16834315445

How do I tell TDP, memory frequency, etc?

if the sku ends in xx30p its 35W

 

[Abwx]

What's the difference of Bristol Ridge over Carizzo? DDR4 memory support and a bump in frequency?

Hmm, it says release is June 2016... Anyone see any of them on the market yet?

Edit: Here's one.

http://www.newegg.com/Product/Product.aspx?Item=N82E16834315445

How do I tell TDP, memory frequency, etc?

The difference is mainly the UVD with wider hardware support of video formats, these could be apparently decoded by Carrizo, or even Kaveri, but with higher CPU usage.

Existing models, at least in Europe, are still the usual mainstream offerings with 15W APUs:

https://geizhals.de/?cat=nb&xf=6749_19#xf_top

 

[cebalrai]

Seems that only Lenovo will deliver the high TDP again... in Intel AND AMD... those U crap ruined the performance laptop market T_T

Is there a 35W Lenovo Bristol model out somewhere? Not seeing one but I suck at finding these things.

I really wish there was a 35W 17" screen model...

 

[cbn]

I think you are going to have a hard time. Most Intel laptops these days are 15W, so you figure any OEM wanting to do an AMD model would want to match that.

15W CPU + 25W dGPU laptops are pretty common though. Example here.

And they also cost more than 15W laptops that rely on iGPU only.

So I have been wondering on why Laptop makers keep choosing the 15W AMD APU option when the 35W AMD APU option costs them the same money?

 

[cbn]

Is there a 35W Lenovo Bristol model out somewhere? Not seeing one but I suck at finding these things.

I really wish there was a 35W 17" screen model...

I haven't found one yet, but maybe some company will finally make one?

Please post your desired specs here (and hopefully one of the OEMs will see it).

P.S. Regarding the lack of 35W compared to 15W, I do wonder how much of this is being caused by lack of understanding? Certainly going by the data we already have for Carrizo, the higher TDP made much better use of the silicon. But maybe the labeling of SKUs is causing some confusion? (ie, Why buy 35W when the 15W specs look almost as good on paper?)

 

[frozentundra123456]

15W CPU + 25W dGPU laptops are pretty common though. Example here.

And they also cost more than 15W laptops that rely on iGPU only.

So I have been wondering on why Laptop makers keep choosing the 15W AMD APU option when the 35W AMD APU option costs them the same money?

Probably so they can save on cooling costs, and for better battery life, although personally I would prefer higher performance to longer battery life. Actually, I even wish intel would go back to higher tdp/higher performance laptop chips, maybe a higher clocked dual core that can better maintain turbo, or a downclocked quad.

 

[cbn]

Probably so they can save on cooling costs, and for better battery life, although personally I would prefer higher performance to longer battery life.

35W is less than 40W though (15W Intel CPU plus 25W Nvidia GT940M).

So saving money on cooling isn't the reason.

And as far as battery size goes, the APU should allow a bigger one.

P.S. The argument also applies to 35W APU vs 15W AMD APU plus AMD dGPU as well.

 

[cbn]

@ frozentundra123456,

Yes, the 15W APU would have lower cooling costs than a 35W APU.....but then it would compete in a much lower performance category. (ie, the OEM saves a bit of money, but then laptop is no longer competitive against the more expensive laptops with dGPU).

But the question is do people realize the differences in performance scaling? I don't think the average person would. Remember Carrizo had the same advertised specs whether it was 15W or 35W. And Bristol Ridge now has two levels of SKUs (15W and 35W), but the advertised specs are not much different.

 

[Abwx]

35W is less than 40W though (15W Intel CPU plus 25W Nvidia GT940M).

So saving money on cooling isn't the reason.
.

There s no saving actually as there s the same cooling device wether there s a dGPU or not...

 

[cbn]

If 35W Bristol Ridge laptops do not show up in a timely manner, I am hoping we at least get some 35W Bristol Ridge SFF motherboards.

Then maybe some collaborative benchmarking like AtenRA and I did here to show the performance difference between 15W and 35W.

 

[frozentundra123456]

@ frozentundra123456,

Yes, the 15W APU would have lower cooling costs than a 35W APU.....but then it would compete in a much lower performance category. (ie, the OEM saves a bit of money, but then laptop is no longer competitive against the more expensive laptops with dGPU).

But the question is do people realize the differences in performance scaling? I don't think the average person would. Remember Carrizo had the same advertised specs whether it was 15W or 35W. And Bristol Ridge now has two levels of SKUs (15W and 35W), but the advertised specs are not much different.

Well, the question is, will the APU at 35 watts, considering possible throttling, even at the higher TDP, be a better solution than the intel plus discrete that you yourself proposed. They also would have to be sure to include dual channel, fast memory with the APU, which OEMs seem reluctant to do.

Edit: looking at Aten Ra's own benchmarks in the thread you linked, it looks like a full 95 watt Kaveri is about equal to a desktop GT730 which has the same number of shaders as the 940M. So even with the power improvements in Carizzo, I doubt, even at 35 watts, it would be any faster than a discrete 940M. So it would come down to price.

 

[cbn]

Well, the question is, will the APU at 35 watts, considering possible throttling, even at the higher TDP, be a better solution than the intel plus discrete that you yourself proposed. They also would have to be sure to include dual channel, fast memory with the APU, which OEMs seem reluctant to do.

For relatively graphic dependent gaming it would depend on the resolution and detail settings.

The GT940M has a 64 bit DDR3 2000 memory bus, while the 35W BR has 128 bit @ DDR4 2133 (or 2400) shared between the CPU and iGPU.

And for a CPU light game, I think more bandwidth can be used by the iGPU than with a CPU heavy game.

 

[cbn]

Edit: looking at Aten Ra's own benchmarks in the thread you linked, it looks like a full 95 watt Kaveri is about equal to a desktop GT730 which has the same number of shaders as the 940M. So even with the power improvements in Carizzo, I doubt, even at 35 watts, it would be any faster than a discrete 940M. So it would come down to price.

For that comparison, my GT 730 (Kepler v2) has 64 bit GDDR 5000 while the GT940M (Maxwell v1) used in these notebooks only has 64 bit DDR3 2000*.

Also the Bristol Ridge processor has Delta Color Compression which allows for more efficient use of 128 bit DDR4 2133 than Godavari @ 128 bit DDR 2133.

So basically the bandwidth situation is reversed in the comparison we are trying to imagine.

*Maxwell v1 does have larger L2 cache than Kepler. This does help bandwidth efficiency....but not nearly enough to compensate for a Kepler dGPU with 64 bit GDDR5 5000.

 

[ET]

So I have been wondering on why Laptop makers keep choosing the 15W AMD APU option when the 35W AMD APU option costs them the same money?

Probably because it doesn't. You see Stoney / Bristol Ridge with a low end discrete AMD GPU (example), which suggests that AMD charges a premium for its higher end chips.

It may also be that it's easier for OEM's to use discrete GPU's because they have consistent performance regardless of the CPU memory configuration.

 

[monstercameron]

Probably because it doesn't. You see Stoney / Bristol Ridge with a low end discrete AMD GPU (example), which suggests that AMD charges a premium for its higher end chips.

It may also be that it's easier for OEM's to use discrete GPU's because they have consistent performance regardless of the CPU memory configuration.

yeah but it costs more in cooling, parts, warantee etc...cant see the logic in that.