LTC8K6
Lifer
- Mar 10, 2004
- 28,520
- 1,576
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Can you even get an 8700K to stay at base frequency under load on it's own?Great, show me a CPU only load that uses 95W on 8700K while running at 3.7Ghz
Can you even get an 8700K to stay at base frequency under load on it's own?Great, show me a CPU only load that uses 95W on 8700K while running at 3.7Ghz
So, that is two codes out of...……………..?
Sure you can, put an AVX load on it, maybe spice it up with some GPU load, it will eventually lower clocks to keep power at 95W IF this power target is configured as stock on the motherboard. (I doubt any Z board enforces stock TDP)Can you even get an 8700K to stay at base frequency under load on it's own?
Yep, and he explained why. Perhaps you should re-read them.He didn't sum up your point. He went in hard against you. You were the one saying Intel is price-gouging. Right?
This was all about using 15% from Stilts test as a means of comparing between processors based on core counts, like Epsilon did:
IMO a number derived only based off single core, opens source with lastest Intel compiler, is less representative IMO,than one using off the shelf software with SMT/HT enabled. But neither is really generally applicable.
IMO there are no blanket IPC numbers.
You really need a formula like
Clock Speed X Core Count X IPC of specific load(and accounting for HT/SMT).
So in the case of comparing a 8C 9900K to a 1920x, it depends heavily on what you are doing. Playing games, the 9900K will clearly be better, doing 3D rendering, the 1920x will have sizable lead.
Prices have been released. The 2920X is $649 - I've seen the 1920X for $523. The 2950X is $899, 2970WX is $1299, and the 2990WX is $1799. 32-core launches 8/13 , 16-core 8/31, 12 and 24-core in October. It doesn't look like there's going to be an 8-core 2900X.I agree that there is no universal 'absolute IPC', it all depends on the software suite used. As abwx pointed out, you can actually find comparisons that show AMD having almost no IPC deficit, then others like techspot showing something in between, compared to Stilt's 'Intel favouring' results. Who is correct? They all are. Also, you are correct that there is ST IPC, and then there is MT IPC which has to take into account scaling of HT/SMT - the only problem is that this is a moving target as well, as HT/SMT improvements range from almost nothing (sometimes negative scaling even) to over 40% depending on the software.
FWIW, my point doesn't really change WR to the 9900X vs 1920X even if you change the 1.15x IPC advantage to something like 1.1x or even 1.05x
4.7 x 8 x 1.1 = 41.36
4.7 x 8 x 1.05 = 39.48
3.7 x 12 = 44.4
Let me put it another way - the 9900K would be closer in overall performance to a 1920X (or 2920X even) than it is to a 2700X. So I actually do agree that potentially pricing those chips close to the $500 mark could steal some of the 9900K thunder, but X399 motherboards won't be discounted anytime soon, unfortunately. Then again, when you are in this price range, do people care that you have to spend $300 on a motherboard?
I agree that there is no universal 'absolute IPC', it all depends on the software suite used. As abwx pointed out, you can actually find comparisons that show AMD having almost no IPC deficit, then others like techspot showing something in between, compared to Stilt's 'Intel favouring' results. Who is correct? They all are. Also, you are correct that there is ST IPC, and then there is MT IPC which has to take into account scaling of HT/SMT - the only problem is that this is a moving target as well, as HT/SMT improvements range from almost nothing (sometimes negative scaling even) to over 40% depending on the software.
FWIW, my point doesn't really change WR to the 9900X vs 1920X even if you change the 1.15x IPC advantage to something like 1.1x or even 1.05x
4.7 x 8 x 1.1 = 41.36
4.7 x 8 x 1.05 = 39.48
3.7 x 12 = 44.4
Let me put it another way - the 9900K would be closer in overall performance to a 1920X (or 2920X even) than it is to a 2700X. So I actually do agree that potentially pricing those chips close to the $500 mark could steal some of the 9900K thunder, but X399 motherboards won't be discounted anytime soon, unfortunately. Then again, when you are in this price range, do people care that you have to spend $300 on a motherboard?
But as mentioned I am skeptical of the rumored 4.7 all core clocking of 9900k. Let's just push them as far as reasonable.
Say you can OC 9900K to 5GHz, and 1920x to 4Ghz. Seems in the realm for both. So that yields.
5 x 8 = 40
vs
4 x 12 = 48
Before you get to IPC difference. If you have the load that is neutral or favors Ryzen then you have a case. But again, it is highly load dependent.
The $300 MB. Yeah, I thought there were $200 models, but it appears $300 is the floor. So it will definitely cost more.
Bottom line, I guess you need a load that is at least neutral, preferably favoring Ryzen, to make it an attractive alternative for someone considering a 9900K.
Probably more useful as marketing stunt that real sales movers. Like the 8086K trade in program.
Sure you can, put an AVX load on it, maybe spice it up with some GPU load, it will eventually lower clocks to keep power at 95W IF this power target is configured as stock on the motherboard. (I doubt any Z board enforces stock TDP)
Anyway, my original post to which you replied with a hardly necessary explanation of how Intel TDP is defined was based on package power readings while running CB15 (heavy but realistic load) on CFL 6c/12t at 4.3Ghz. If I were to consider Prime 95 I would have said 110-120W instead. It so happens CB load pushes the CPU power usage in the same territory as TDP, but my point was average power consumption, as increasing core count and frequency would require process improvements to compensate. (otherwise the higher than 95W average power consumption would dictate higher TDP)
Since then I've been answered: we don't care about power anymore and related stock clocks either. I guess we'll end up comparing overclocked 2700X with overclocked 9900K and overclocked 2920X in MT loads and call it a day. (that is besides games where 9900K will be a god among puny chips)
Sure, you can be sceptical, but CFL chips are capable of scaling to 4.7GHz at default voltages. Not every chip, mind you, but many do (including my 8700K) and certainly you would expect Intel to use the best dies on the 9900K, that along with a soldered IHS means I don't really have doubts that it's technically feasible. Whether these are the actual launch clocks, we'll find out soon.
Prices have been released. The 2920X is $649 - I've seen the 1920X for $523. The 2950X is $899, 2970WX is $1299, and the 2990WX is $1799. 32-core launches 8/13 , 16-core 8/31, 12 and 24-core in October. It doesn't look like there's going to be an 8-core 2900X.
CFL is capable of 4.7GHz all core, but Intel tends to play that conservative and leave some headroom, for reliability. Let the Overclockers chase the extra. But out of the box they want the highest reliability they can get. Doing 4.3GHz means pretty much none will fail out at default clocks except is some extreme fluke situation.
As far as the soldered IHS, that is also a rumor. IMO when I saw those rumors together, it read like an enthusiast wish list. 8Cores with 5GHz Turbo, with 4.7GHz all core Turbo, and soldered IHS.
When I see rumors that look like a wish list, I can't help thinking there is some wishful thinking in there, or people having a laugh.
So I view those rumors with a LOT of skepticism.
Just like the rumored 8 Core CXX, giving 16 core 7nm Ryzen desktop parts in 2019, looks a lot like wishful thinking to me, so I am skeptical of that as well.
Quad channel is just 4 sticks, either 4 singles, 2 double or 4 pack. They don't have to be matched. All my TR boxes are 2 sets of 2 sticks, and they all run 3466 or faster.Reasonable prices all round, but with the exception of the 1920X, not really close enough to the 9900K to be truly disruptive. Still, the price of X399 mobos makes the 1920X a hard sell in a direct comparison to the 9900K, since we're looking at
$823 for a 1920X + X399 mobo ($300)
$600 for a 9900K + Z370/Z390 mobo ($150)
Quad channel memory could potentially be more expensive than dual channel as well.
I'm aware that X399 boards have additional features not found on Z370/Z390 so it's not exactly a direct apples to apples comparison, but that's what we have in front of us in terms of cost outlay.
I'm just merely speaking from what I believe is technically feasible, 4.7GHz is definitetly in the upper ranges of that, but still plausible.
I do see where your scepticism is coming from though, even though I believe the soldered IHS would be a great idea especially on a chip like the 9900K. Let's hope the rumours are true.
Yeah I understand that,Quad channel is just 4 sticks, either 4 singles, 2 double or 4 pack. They don't have to be matched. All my TR boxes are 2 sets of 2 sticks, and they all run 3466 or faster.
I think with quad channel, and all the other advantages, the 1920x would over be better, but it costs more.
Bottom line is we have more choices. Of course all this is dependent on the 9900k being $450, and I would not bet the farm on that. Good if it was.
Quad channel is just 4 sticks, either 4 singles, 2 double or 4 pack. They don't have to be matched. All my TR boxes are 2 sets of 2 sticks, and they all run 3466 or faster.
I think with quad channel, and all the other advantages, the 1920x would over be better, but it costs more.
Bottom line is we have more choices. Of course all this is dependent on the 9900k being $450, and I would not bet the farm on that. Good if it was.
I had no issue with using overclocked 9900K numbers, I had no issue with non-stock power numbers, what I did have an issue with was using stock clocks for 1920X in a comparison with obviously non-stock clocks for 9900K.I think you pretty much answered your own questions - TDP limits aren't enforced on enthusiastic level motherboards by either AMD nor Intel, so it's rather meaningless to discuss hypotheticals when we all know under worst case loads the power consumption will far exceed the rated TDP. If you want power efficiency then these chips aren't for you.
Bottom line - get a good cooler for a 9900K and you're set. Sure, it may consume 200W when overclocked to 5GHz, so what? A high end GPU consumes even more than that at stock and no one cares.
Reasonable prices all round, but with the exception of the 1920X, not really close enough to the 9900K to be truly disruptive. Still, the price of X399 mobos makes the 1920X a hard sell in a direct comparison to the 9900K, since we're looking at
$823 for a 1920X + X399 mobo ($300)
$600 for a 9900K + Z370/Z390 mobo ($150)
Quad channel memory could potentially be more expensive than dual channel as well.
I'm aware that X399 boards have additional features not found on Z370/Z390 so it's not exactly a direct apples to apples comparison, but that's what we have in front of us in terms of cost outlay.
Yes, but those results are derived from less than 10 applications (I believe 9, and 7 respectively). They are also highly threaded, and therefore plays into AMD's favour. I don't even know what methodology they used, but if you're going to test for IPC, you must test single core and multi-core separately. In the case of the latter, you must divide the total score by the number of threads. The Stilt's work and range of software covered is far superior to those benchmarks you referenced.I counted 3 if you took notice, that being said if those 14% were real then a 8700K should perform 25% better than a 2600X on average given the 10% frequency advantage, yet this average do not materialize elsewhere than in The Stilt s "results" :
https://www.computerbase.de/2018-04/amd-ryzen-2000-test/3/#diagramm-leistungsrating-anwendungen
https://www.hardware.fr/articles/975-17/indices-performance.html
9% at Computerbase and 11.3% at Hardware.fr, wich amount to the 8700K frequency advantage, in games it s 16% and 11.1% respectively, one more time perf is more frequency than throughput/Hz related...
But there is. There are even standard industry benchmarks. On the other points, read my reply to ABWX above.I agree that there is no universal 'absolute IPC', it all depends on the software suite used. As abwx pointed out, you can actually find comparisons that show AMD having almost no IPC deficit, then others like techspot showing something in between, compared to Stilt's 'Intel favouring' results. Who is correct? They all are. Also, you are correct that there is ST IPC, and then there is MT IPC which has to take into account scaling of HT/SMT - the only problem is that this is a moving target as well, as HT/SMT improvements range from almost nothing (sometimes negative scaling even) to over 40% depending on the software.
FWIW, my point doesn't really change WR to the 9900X vs 1920X even if you change the 1.15x IPC advantage to something like 1.1x or even 1.05x
4.7 x 8 x 1.1 = 41.36
4.7 x 8 x 1.05 = 39.48
3.7 x 12 = 44.4
Let me put it another way - the 9900K would be closer in overall performance to a 1920X (or 2920X even) than it is to a 2700X. So I actually do agree that potentially pricing those chips close to the $500 mark could steal some of the 9900K thunder, but X399 motherboards won't be discounted anytime soon, unfortunately. Then again, when you are in this price range, do people care that you have to spend $300 on a motherboard?
I had no issue with using overclocked 9900K numbers, I had no issue with non-stock power numbers, what I did have an issue with was using stock clocks for 1920X in a comparison with obviously non-stock clocks for 9900K.
You said it yourself, enthusiasts won't bother with power draw, so why do you insist on using 3.7Ghz for 1920X?
Running the chip beyond power specs is overclocking. If you want to be extremely specific and claim overclocking only happens when CPU runs beyond official multiplier for the number of cores, I would ask you what better term you have for non-stock power settings, especially considering power limits & temps are now being used to define stock clock behavior in some CPUs from both Intel and AMD as well as GPUs from both Nvidia and AMD.If you have another source that contradicts these leaked specs, then by all means, show us. But don't accuse me of 'overclocking' the 9900K when I'm clearly going by the rumoured specs.
Turbo boost != overclocking otherwise by definition EVERY SINGLE CPU with turbo boost clocks is 'overclocked' or 'pre overclocked'Running the chip beyond power specs is overclocking. If you want to be extremely specific and claim overclocking only happens when CPU runs beyond official multiplier for the number of cores, I would ask you what better term you have for non-stock power settings, especially considering power limits & temps are now being used to define stock clock behavior in some CPUs from both Intel and AMD as well as GPUs from both Nvidia and AMD.
My desktop CPU is a i7 8700 currently running without a 65W TDP limit. If you think that's not overclocking, please tell me what wording we can use to define this CPU running beyond manufacturer specs.
but if you're going to test for IPC, you must test single core and multi-core separately.
https://slickdeals.net/f/11909115-a...op-processor-yd195xa8aewof-599-shipped-amazon
1950x dropped down to $599 for some time today
https://old.reddit.com/r/buildapcsales/comments/957e3n/cpu_amd_ryzen_threadripper_1920x_24900/
1920x dropped down to $249
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Momma Su straight up spitting on Intel's grave. The absolute state....
Rest in pieces and enjoy the great times ahead !
The next couple of years of hardware is going to be like a freight train w/ no brakes
Nope, it was also amazon no. 1. CPU sold because of thatDamn $249 for a 1920x?! Has to be a mistake.