AMD Wraith - AMD's new box cooler to be shipped with Zen - Temperature tests

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LTC8K6

Lifer
Mar 10, 2004
28,520
1,575
126
If they will use the Wraith on the ZEN CPUs doesnt mean they will release 125W TDP SKUs.

A10-7870K comes with the D3 cooler and its only a 95W TDP CPU.

I suspect that's because some examples tend to run over 95W?

At 117W in our test, it seems a little over the 95W TDP listed, especially when the 7850K achieved 85W and under its 95W TDP. There will be variation within a SKU based on the binning quality, as I doubt the average 0.050 volts added to this SKU as I was told by AMD accounts for this much. Perhaps we ended up with a good 7850K sample but a mediocre 7870K sample. Alas with 100 CPUs we might get a better histogram of performance here, but we rarely get more than a single unit.

From the Anandtech review.
 

Abwx

Lifer
Apr 2, 2011
11,167
3,862
136
I suspect that's because some examples tend to run over 95W?



From the Anandtech review.

Because he s talking of power measured at the main..

In wich case 117W is to be factored by the losses in two voltages conversions with each 90% efficency, that is 97 x 0.81 = 94.77W, and still, that s a worst case because it is assumed that the whole delta is due to the APU...

Anyway it s always worrisome to read that some reviewer who has weak knowledge about electronics come to misrepresent a product due to his own incompetence in the matter, said reviewer actualy should apologise for such misrepresentation of AMD s APU.
 
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coercitiv

Diamond Member
Jan 24, 2014
6,400
12,849
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I suspect that's because some examples tend to run over 95W?
Running over 95W for limited periods of time does not affect TDP rating. From the same article, i7 4790K had a power delta of 110W even though its rated at 88W TDP, and i7 4765T had a delta of 56W even though it's rated at 35W TDP.

PS: I won't address the other factor that needs to be taken into account - efficiency compensation through the power delivery chain, because the data in the article is rather ambiguous, they seem to have done some adjustments, though it is just hinted.
 
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Abwx

Lifer
Apr 2, 2011
11,167
3,862
136
Running over 95W for limited periods of time does not affect TDP rating. From the same article, i7 4790K had a power delta of 110W even though its rated at 88W TDP, and i7 4765T had a delta of 56W even though it's rated at 35W TDP.

Read my post above, the reviewer has a flawed methodology, he use the delta at the main as power consumed by the APU, wich is just aknowledgment of incompetence to do such reviews...
 

coercitiv

Diamond Member
Jan 24, 2014
6,400
12,849
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Read my post above, the reviewer has a flawed methodology, he use the delta at the main as power consumed by the APU, wich is just aknowledgment of incompetence to do such reviews...
Read my PS as well, even if we don't know the exact values and even if some efficiency adjustments were made, we still have a simple method of evaluating data through relative comparison: the 7870K is not the only data set with higher power delta than data sheet TDP, therefore we can simply bypass testing methodology and conclude data is not relevant for assessing chip TDP. Also, you don't have to accuse incompetence every time review data is not conclusive, there are more elegant and productive ways of communicating your findings.
 
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Abwx

Lifer
Apr 2, 2011
11,167
3,862
136
Read my PS as well, even if we don't know the exact values and even if some efficiency adjustments were made, we still have a simple method of evaluating data through relative comparison: the 7870K is not the only data set with higher power delta than data sheet TDP, therefore we can simply bypass testing methodology and conclude data is not relevant for assessing chip TDP. Also, you don't have to accuse incompetence every time review data is not conclusive, there are more elegant and productive ways of communicating your findings.

If i were a basic reader who is not versed in electronics then reading said article would lead me to think that AMD are lying about their TDP rating...

So by not doing his homework such a reviewer is, curiously, transfering on AMD his own incompetence, that s why i used this term as it s a blatant case where a lack of knowledge result in misleading the consumers.
 

tential

Diamond Member
May 13, 2008
7,355
642
121
Really wish they'd use better angles or at least flat out show that it doesn't obstruct the RAM slots if you were to use a kit with high raised fins.

Even that Corsair set, which isn't very tall, almost looks like it wouldn't fit, but of course the camera never goes far enough to show the clearance.

EDIT:

This image shows it will probably be fine with higher finned memory, but that's super tight for my liking.

http://images.bit-tech.net/content_...8370-cooler-review/amd-wraith-9-1280x1024.jpg

Depends on the mobo I bet.
 

SPBHM

Diamond Member
Sep 12, 2012
5,058
410
126
the noise level and temperature difference to the old cooler is huge, it makes buying an aftermarket cooler much harder to justify.

the downside is that it seems to require a larger box, so I don't know how common it will be for new AMD CPUs to adopt this cooler and not one of the old smaller ones? this would be great for overclocking the cheaper CPUs.
 

Erenhardt

Diamond Member
Dec 1, 2012
3,251
105
101

AtenRa

Lifer
Feb 2, 2009
14,003
3,361
136
the noise level and temperature difference to the old cooler is huge, it makes buying an aftermarket cooler much harder to justify.

the downside is that it seems to require a larger box, so I don't know how common it will be for new AMD CPUs to adopt this cooler and not one of the old smaller ones? this would be great for overclocking the cheaper CPUs.

I dont believe you need a larger case for the Wraith, it is only a few cm taller than the D3. The actual heat-sink is almost the same dimensions as the D3, only the FAN is larger.
 

MrTeal

Diamond Member
Dec 7, 2003
3,586
1,746
136
It is not even a thing! How many % warmer is it relative to 52'C?
You get infinite...
How many % warmer is it relative to 53'C?
53-52=1'C
53-59=-6'C
-6/1*100%=-600% warmer? So it is cooler actually in relation to 53'C?

This is not how physics work.
For a proper scientific value go here:
http://forums.anandtech.com/showpost.php?p=38005144&postcount=9

Heh, you're getting too worked up over it. No matter what you use as a baseline, a percentage comparison based on the units is kind of meaningless. Even using Kelvin and referencing to absolute zero gives a useless answer, arguably much worse than the video did.

Really, the only really useful comparison (expressed as a percentage) would be to compare the two deltas over an ambient, since that's actually a useful baseline. Anything else just comparing the two numbers is meaningless, whether it's Kelvin, Celsius, Fahrenheit or eV.
 

DrMrLordX

Lifer
Apr 27, 2000
21,807
11,161
136
LED lighting seems like a really unnecessary expense for AMD.

Got to have that bling yo

I suspect that's because some examples tend to run over 95W?

From the Anandtech review.

7870ks and the UEFIs that support them are notorious for grotesque overvolting. The UEFIs have gotten a little better, but if the 7890k ever launches, it may have a stock vcore of 1.5v for its base clock, or something ridiculous like that.
 

fourdegrees11

Senior member
Mar 9, 2009
441
1
81
Considering AMDs current rep for hot/noisy/throttling with the stock cooler, this should eliminate that impression over time with Zen. Bonus points for likely being able to achieve a nice OC with the stock cooler.
 

Shehriazad

Senior member
Nov 3, 2014
555
2
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No, not surprising, but it would factor into the mix.

Zen might be fast enough to compete, but then a higher TDP could knock it back...

Correct me if I'm wrong...but isn't the plan with Zen to have 8 cores but 16 threads.


Afaik Intels' top dog 8core/16thread 5960X sits at 140W with 3Ghz base/3.5 ghz boost.



And isn't the 6700k rated at 91W for a 4core/8 thread?

I'm just saying....Intel may be massively leading in terms of performance...but their energy efficiency was never all that impressive in my eyes. To me it almost feels like all energy efficiency that Intel has comes mainly from being on a smaller die...and soon AMD will also be on a WAY smaller die.

I mean ffs they're jumping from 32 and 28 to 16 and 14.
 

ShintaiDK

Lifer
Apr 22, 2012
20,378
145
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Zen wont have 256bit paths from the look of it. And it will hurt performance using it big time.

My 6700K is a sub 65W chip not using it.
 

superstition

Platinum Member
Feb 2, 2008
2,219
221
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yea the 8320e is 95W TDP and it has the simple aluminum cooler
The 8370E's fan is twice the thickness of the 8320E's.
coercitiv said:
Running over 95W for limited periods of time does not affect TDP rating.
But companies play games with TDP, too. Does the 4970K ever run at 88W for a strong workload?
 

coercitiv

Diamond Member
Jan 24, 2014
6,400
12,849
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Does the 4970K ever run at 88W for a strong workload?
Some numbers from the guru3D review:

Normal usage scenario, no discrete GPU:
System idle power usage - 42W
System load power usage - 109W

Prime 95 load:
CPU Package Power: 86W
Max CPU Package Power: 112W

The answer to your question is: YES. Still, the chip TDP is 88W.
 

superstition

Platinum Member
Feb 2, 2008
2,219
221
101
Some numbers from the guru3D review:

Normal usage scenario, no discrete GPU:
System idle power usage - 42W
System load power usage - 109W

Prime 95 load:
CPU Package Power: 86W
Max CPU Package Power: 112W

The answer to your question is: YES. Still, the chip TDP is 88W.
Interesting. The 8320E is rated for 95W and the 8370E is rated the same but the latter uses more power than the former.

Maybe maximum CPU package power is more useful than TDP. Use a passive cooler rated for 95 watts with a 4790K and I bet one would have issues.
 

raghu78

Diamond Member
Aug 23, 2012
4,093
1,475
136
Zen wont have 256bit paths from the look of it. And it will hurt performance using it big time. My 6700K is a sub 65W chip not using it.

AMD's design philosophy is going to be to focus on the right engine for the right workload. So thats why they want to keep the Zen CPU FP at 128 bit. If somebody wants good FP performance AMD will have Zen APUs which crush Intel CPUs/SoCs for FP workloads.

As far as most productivity software and games are concerned integer performance is what matters and thats what sells CPUs in consumer market.
 
Mar 10, 2006
11,715
2,012
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AMD's design philosophy is going to be to focus on the right engine for the right workload. So thats why they want to keep the Zen CPU FP at 128 bit. If somebody wants good FP performance AMD will have Zen APUs which crush Intel CPUs/SoCs for FP workloads.

As far as most productivity software and games are concerned integer performance is what matters and thats what sells CPUs in consumer market.

Falling back into your old ways, I see
 

mysticjbyrd

Golden Member
Oct 6, 2015
1,363
3
0
Correct me if I'm wrong...but isn't the plan with Zen to have 8 cores but 16 threads.


Afaik Intels' top dog 8core/16thread 5960X sits at 140W with 3Ghz base/3.5 ghz boost.



And isn't the 6700k rated at 91W for a 4core/8 thread?

I'm just saying....Intel may be massively leading in terms of performance...but their energy efficiency was never all that impressive in my eyes. To me it almost feels like all energy efficiency that Intel has comes mainly from being on a smaller die...and soon AMD will also be on a WAY smaller die.

I mean ffs they're jumping from 32 and 28 to 16 and 14.

I heard they were releasing quad core units.

"There's just one area where Zen will differ from Haswell. With Haswell, Intel has shown that it can clump any number of cores on a chip, and make them share a proportionately large L3 cache. Haswell-E features 8 cores sharing a 20 MB cache. The Haswell-EX features 18 cores sharing 45 MB of cache. With Zen, however, the scale up stops at 4 cores sharing 8 MB of L3 cache. A set of four cores makes up what AMD calls a "quad-core unit." To be absolutely clear, this is not a module, the cores share no hardware components with each other, besides the L3 cache."

http://www.techpowerup.com/212134/first-amd-zen-chips-to-be-quad-core.html


This is old info, and I am not sure how reliable it is.
 

raghu78

Diamond Member
Aug 23, 2012
4,093
1,475
136
Falling back into your old ways, I see

My view is once people get their hands on high performance APU/SoC with stacked memory they will not look back. Anyone who wants serious FP performance will look at Intel Xeon Phi / Nvidia Pascal/ AMD Greenland and AMD Zen based APUs. I am looking forward to Zen APUs with HBM2 in both consumer and server segments.
 

DrMrLordX

Lifer
Apr 27, 2000
21,807
11,161
136
Considering AMDs current rep for hot/noisy/throttling with the stock cooler, this should eliminate that impression over time with Zen. Bonus points for likely being able to achieve a nice OC with the stock cooler.

Agreed. If the Wraith cooler can function as a stand-in for popular $30-and-less aftermarket HSFs then that reduces the cost-of-entry for AMD chips by a similar amount, especially for the budget overclocker.

If AMD sets up AM4 CPUs to be easy bclk overclockers, then major bonus.
 

itsmydamnation

Platinum Member
Feb 6, 2011
2,866
3,418
136
My view is once people get their hands on high performance APU/SoC with stacked memory they will not look back. Anyone who wants serious FP performance will look at Intel Xeon Phi / Nvidia Pascal/ AMD Greenland and AMD Zen based APUs. I am looking forward to Zen APUs with HBM2 in both consumer and server segments.

SIMD not FP , SIMD might be FP or INT. Even then its only times when you can make use of 256bit SIMD that intel will have a serious advantage.

In games for example that will be when 32bit precision isn't enough and 64bit is needed, but that wont happen for the rest of this console gen and until AVX 256 bit is shipping on all x86 parts.
 
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