AMD CPU speculation... and expert conjecture

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The difference between 4320 and 4100 is almost explained by the clock boost and the IPC gain BD->PD. No?
 


You clearly did not read what I wrote...how long are you going to continue this blatant ignorance?

Does anyone else want to explain to juanrga what I said?

What is your native language? It's clearly not English because you don't understand it very well. Where did I say 2.75 GHz in the post? You reference topics from May, and claim that it's relevant since the information we had at the time changed. You also said exactly what I did at that time, because that's what we knew then. Now, you would deny that you were prepared for AM3+ steamroller on FD-SOI????
 


Recompiling is a fickle beast.

Best case I saw was a more than doubling of speed with Blender. Worst case I saw was hardly any gain in firefox (around 5%).

Recompiling CAN give you massive results and it can do absolutely nothing.

It is really too difficult to tell if that difference is due to BD architecture or new instructions being used.

Although, about that leak running a t1.8ghz. Let me help you guys with something I didn't notice before.

AMD Eng Sample: 1M186092H4468_23/18/14/05_1304h

See that M?

Take look here: http://en.wikipedia.org/wiki/List_of_AMD_Accelerated_Processing_Unit_microprocessors#Comal_-_.22Trinity.22_.282012.2C_32_nm.29_2

See A10 desktop APUs have their second letter as a D?

See mobile APUs have second letter as M?

This chip is a 1.8ghz laptop part. However I still have no explanation for 2.9ghz 7800k part.
 


If the GPU clock speeds are accurate it's likely to accommodate that and still fit at 95W.
 


If that's your point then you need a different benchmark. The quad-core FX is markedly slower than the octo-core FX, despite running at the same clockspeed. More cores does matter for AMD.

Aside from that, it is a terrible benchmark setup to begin with. A bottlenecking test is only useful if it represents something that might be seen in the real world. Running a Titan at 1080p is not a realistic scenario, at least not one that should be encouraged by anyone except Nvidia's Marketing Dept.

Even the results aren't good. Average fps, but nothing else? At least include minimum fps so people can see under the hood a bit. It's really a bad test setup, which results in minimal information to be gained from the result. If you're doing a bottlenecking test, use a setup that might see use in the real world. For 1080p, test using a card that is known to run 1080p easily, i.e. a Radeon 7870 or a GTX 580. Otherwise it's almost meaningless.
 
I've started to use minimum FPS on any modern game (the above game is not modern in the slightest). Modern games are using a dynamic threading concept, you still have your two primary threads but also have dozens of other threads that do work on demand. You can see it in Crysis 3, BF3 and it's really apparent in BF4. Looking at the sky or wondering around a village with vegetation doesn't use much beyond ~3 cores worth of power. Once environmental interactions, explosions and physics start going on you see the extra cores shoot up in utilization. What matters is the performance during a large firefight, not the performance while your sightseeing.
 
If that was a 7800k part, I would imagine it's one of 2 things:

1. That was something akin to a "beta" ES ramping up clockspeeds.

OR

2. That is the result of the wonderful decision to go bulk wafers, and they will likely be chewing on that for a while, meanwhile, the product will bomb with laptop CPU-esque clockspeeds. They will try to sell the daylights out of HSA if that is how the yields turn out...but it won't matter. They'd need a good 75% increase in the instruction efficiency category to compete or be slightly ahead at lower clocks.
 


Someone at OCN who reads Italian stated that the 2.9ghz is not final clockspeed as that was claimed somewhere in (edit) another article.

We, to simplify, we will use the name "A10-7800K."

Basically, at least one part of "A10-7800k runs at 2.9ghz" is false.
 


The article basically said "we don't know what this is so lets call it A10 7800k"

Pretty good way to get a ton of page views for people who don't read the article (I did this first as well).
 


You can try that tactic, you can pretend that you never said so or when caught with a quote, you can pretend that you said it in "May", but not latter. However. it is not a wise thing to do, because I can link to your posts.

Look at this one, you said that the PS4 is clocked at 2.75Ghz, someone corrects you and explain you that 2.75 is the freq. of the memory and that the CPU is clocked at 1.6GHz. Your typical ignorant answer was

http://www.tomshardware.co.uk/forum/352312-28-steamroller-speculation-expert-conjecture/page-138#11425669

Now pay attention to the next message after yours, where the same person corrects you again and explain you again that 2.75 is the memory freq. Your reply to him was again "NO".

You were plain wrong for days. I had to confirm here

http://www.tomshardware.co.uk/forum/352312-28-steamroller-speculation-expert-conjecture/page-141#11457221

that 2.75Ghz is the WCK of the memory, and that the freq. of the CPU is 1.6GHz. My post was followed by a series of funny replies.

Did you learn anything? Nope. Because days latter you wrote:



Microsoft has confirmed that Xbox1 is clocked at 1.75GHz. But you continue posting misleading info.

About SOI. So late as September I wrote that Kaveri/SR is bulk:

http://www.tomshardware.co.uk/forum/352312-28-steamroller-speculation-expert-conjecture/page-142#11461096

This generate a series of answers from several experts (including you) trying to convince me that Kaveri was being made on SOI process. Some quotes:





Until i asked you "If you have one source that says that Kaveri is being manufactured on SOI process, please share it with us." Your answers:



You insisted with your it is SOI, SOI is ready, AMD is talking about SOI... My answer:

http://www.tomshardware.co.uk/forum/352312-28-steamroller-speculation-expert-conjecture/page-142#11467899

and during page 143 you continued claiming your confidence in that was SOI, because SOI was ready, trololo

You can now pretend that you never said that Steamroller is AM3+, that you never said that Kaveri/SR is SOI, that you never said that PS4 clock is 2.75Ghz, that you never said that Xbone ~2.0--2.2GHz, that you never said that PhysX is not in PS4, that you never said...

You can pretend that you said those in "May", but not latter. The problem is that your posts show otherwise.
 


Yes, my complain was about the supposed desktop APU with 2.9GHz for CPU and 1.1--1.2GHz for the GPU. Those frequencies make no sense at all. They even disagree with 1050 GFLOP given by AMD labs.

My red flags raised when the same source that gave those freq. added that frequencies are not decided still :ouch:
 


Out of curiosity, how is the engine "outdated"? Its still capable of outputting top tier visuals, handling every major Physics engine out there, and unlike everyone elses engines, does it at greater then 60 FPS.

Granted, its aged, but Unreal 3 is still quite the viable game engine to work with.
 


According to the source that is the top 100W quad-core APU. I don't trust them, because they freq don't match with the performance measured by AMD labs and because they claim that the freq. that they report are not still decided.

Glofo already has ~3.6 GHz on bulk and according to some sources, them have been tweaking SR on bulk for almost one year for improving yields and freq.

Note: if AMD is able to obtain the same performance with 1GHz less, that is welcomed, of course. But it is difficult to believe that could obtain 50% IPC in a single gen. Time will say.
 
If that's your point then you need a different benchmark. The quad-core FX is markedly slower than the octo-core FX, despite running at the same clockspeed. More cores does matter for AMD.

Emphasis mine. More cores matter more for AMD because, with only four cores, they are getting totally overloaded due to their poor IPC. As a result, if even ONE core gets loaded, performance tanks. Hence why AMD's performance tends to scale linearly as you OC. Intel quads, by contrast, don't have that problem (for the most part) at base clocks, hence why OCing tends to offer less performance increase (no bottleneck to remove).

Hence why games like BF4, where AMD gains significant performance as more cores are added, yet Intel performance is still sorted largely by IPC + Clock performance, and also why Intel tends to maintain its gaming lead.

See:
http://www.bf4blog.com/battlefield-4-retail-gpu-cpu-benchmarks/
http://pclab.pl/art55318-3.html

FX-8350 ~ i5 2500k in BF4, despite how well threaded it is. That's how superior IPC is better for overall performance in a nutshell. For Intel, more cores essentially just lowers overall core loading, since its high tier i5's aren't bottlenecked.

This was my exact argument against BD from the very beginning, and three years in, AMD still can't beat SB i7's. Even in games using over a dozen threads, like BF4, AMD still looses, or at best, matches Intel, head to head.
 


Your prediction, before BF4 beta was released was that 8350 would perform as an i3. You are now changing to an i5, but benchmarks show how the 8350 performs like an i7

Battlefield-4-Beta-Benchmark-Gaming-PC-02.jpg


FX-8350 ~ i7 2600k in BF4.
 


Umm did you actually look at the benchmarks you posted? The FX8350 beats the i5 and is within the i7 range, especially if you remember minimum FPS is far more important the average.

BF4 is following the same tactic that BF3 and C3 did with using ~2 primary threads and then loading additional work onto the extra threads as needed. Walking around a village looking at scenery is a rather useless metric when the real experience will be during combat which is where the additional cores are loaded. Its the dynamic environmental interaction that's using the extra cores, something that is fairly parallel friendly to do. I'm waiting to see intense multi-player action (after release), I expect we'll see the same repeat of the BF3 scenario.
 


I said, and I quote:
Per the patent applications, the maximum clockspeed listed for PS4 is 2.75 GHz

That statement is entirely accurate. I didn't say specifically that it would be clocked at those speeds...in fact, I said that I expected it would come in quite a bit closer to ~2.2-2.4 GHz multiple times in this thread and others.

I did say Steamroller would be AM3+, at the time AMD had announced one more generation of processors for AM3+ and the Centurion line had not been announced...what was the logical conclusion to make?

I did say Kaveri would likely be SOI...I never denied that. In fact, I am not entirely convinced to this point that it will still be on bulk as you claim.

http://www.advancedsubstratenews.com/2013/07/globalfoundries-on-cost-vs-performance-for-fd-soi-bulk-and-finfet/

There it shows GF is ready to produce 28nm SHP (FD-SOI), and that the costs are less than bulk process. This is because the design phase doesn't require all the masking layers that bulk does. AMD has said many things, and then done something different before...we will wait to see what the product actually is to confirm bulk or SOI. However, if it's bulk, I expect Kaveri will not be the knight in shining armor they need for APUs. Performance will end up similar to Richland because of the lower clocks and higher heat generation thresholds.

http://www.globalfoundries.com/dac2013/seminardetails.aspx

http://www.electronicsnews.com.au/news/globalfoundries-to-take-on-stmicroelectronics%E2%80%99-fd

http://www.globalfoundries.com/technology/tech_elements.aspx

http://www.globalfoundries.com/technology/advanced_tech.aspx

There is no reason to suggest that GF is not ramping FD-SOI. Especially after they announced at the consortium this year that production would ramp up Q4 2013. I think this is credible because they have been trying to ramp it up since end of 2012.

Charlie @ S|A dissected the PS4 APU, and said it would run right at ~2.0 GHz. He dissected the XBone APU and said it would run at ~1.8 GHz. So, I was right, it was closer to 2.2-2.4 than 1.6 GHz.

I fail to see what you're talking about where I was wrong...where do you have proof that AMD has said anything about bulk since 2012? You don't...considering the plethora of things that have changed since Q1 2012...I would say it's fair to think that bulk may entirely be wrong, just as much as it may entirely be right. We will see...
 


+1
 
Funny how GameGPU always tends to disagree with other benchmarkers though:

http://pclab.pl/art55318-3.html

bf4_cpu_geforce.png

bf4_cpu_radeon.png


MP benchmarks, with the FX-8350 essentially equal to the i5-2500k, both at stock.

http://www.tomshardware.com/reviews/battlefield-4-graphics-card-performance,3634-10.html

CPU.png


Toms shows the same result, with the FX-8350 just behind the i5-2500k (higher minimum, lower average).

Waiting on other sites to do benchmarking, but I've noticed a trend for a while now that GameGPU tends to bias toward AMD. I noted this going back to the BF3 benchmarks a year or so ago, as well as in a few other titles (Crysis 3, etc).

EDIT

There could be a SP/MP bias going on, where SP benefits AMD more then MP. That would be an interesting discussion if true, since you'd reason MP would end up more threaded in most cases. Might be something worth looking into.
 

may be some details are left out in the gamegpu review texts. pclab usually explains more and better than gamegpu if you take the trouble to translate the text. between the two, i believe pclab more. it always pays to look into benchmarks.
unless ofc, one parrots the shiny charts and pictures only.
 


By your logic, according to TH's benches, the 2500k > 3960x.

I think that entire argument seems a bit flawed...especially considering minimum FPS.

Conveniently, you like to ignore minimum FPS though...
 


Or you could take the other way and say that you often quote benchmarks biased against AMD.
 
There could be a SP/MP bias going on, where SP benefits AMD more then MP. That would be an interesting discussion if true, since you'd reason MP would end up more threaded in most cases. Might be something worth looking into.

I believe they're MP code isn't finished yet and thus the "beta" moniker. Also exactly what part of the game are they benchmarking? I say this because doing controlled runs where your just looking at scenery or in very limited fights won't get you anymore then three or four cores worth of load. That's why the discrepancy in the minimum vs average FPS.

I could setup a benchmark where all I did was stare at a tree for 10 minutes and you'd get the i3 ranking close to the i5. Now I don't think people are doing that but I do believe the exact environment needs to be described. This is the problem with benchmarking "live" games, any situation that would be repeatable wouldn't have much actual load in it.
 


The complain is not about that statement, but about others quoted above where you pretended that the CPU was clocked at 2.75GHz. You can continue negating it...



Funny how you changed your words, from your initial I never said AM3+ to your I said AM3+. Any bet that if I had not liked to a post with your exact words you would be still negating what you said?


Effectively, you said it.
 
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