No, CPU design and manufacturing is just complicated.oh you mean Intel. That’s a low bar.
First time a race to finish last.Intel: "Our microcode update for our 13th and 14th generation of processors is a tiny bit more complicated than anticipated and as a result the releasedate will slip from August the 15th to the 16th."
Per GN Steve, It was AMD's validation team that identified "something they didn't like".I wonder if Youtubers like GamersNexus etc noticed a problem and let AMD know? Either way, better now than a full recall later. It's just two weeks, no lifes will be lost.
"This is not because AMD’s found any issues with the actual chips, spokesperson Stacy MacDiarmid tells The Verge. Rather, AMD discovered some of its chips didn’t go through all of the proper testing procedures, and the company wants to make sure they do."
Pure speculation, but from the statement, and what we've seen from ES samples, and the fact that the top SKUs are affected more, I would guess hitting spec clock speeds (5.7/5.6 GHz for 9950X/9900X). Maybe some of the retail units only hit 5.5 GHz or so.Well... if they catch it before launch they're about 640 days ahead of the x64 competition.
But I wonder what they weren't testing previously.
an OSAT goof?
I couldn't help it.+32% IPC Zen5 on August 15th!!
Do you remember the launch problems of Zen 4 and burned burned sockets? Maybe AMD simply prefer a launch without bugs, as in September no one will remember if it was a late July or early August launch. They will however remember if their CPU is not working.My decision to get the 7700x is looking increasingly better every day. What a cluster fudge of a launch.
AMD - The Software Company!Maybe AMD simply prefer a launch without bugs
They said that it was about what could be obtained at stock but the chip was under LN2 when they got this number.
Looking at the 55046 pts score at 6.375Ghz then those 42k were performed at 4.86GHz, beside the alleged 7 Zip 214,113 score is only 3.83% better than the 7950X, wich lead me to think that those numbers are not what we ll see in reviews.
The 7950X 7 Zip score can be found here, it s 206,214 :
Intel Core i9-14900KS im Test: Anwendungs-Benchmarks, Leistungsaufnahme & Temperatur
Intel Core i9-14900KS im Test: Anwendungs-Benchmarks, Leistungsaufnahme & Temperatur / Testsystem und Testmethodik für Anwendungenwww.computerbase.de
I doubt that. Having out of stock products for a few months has never been an issue before.My best guess is that the Yields just aren't there. 5.4 and 5.5GHz kinda works, so the 2 small SKUs can Release on 8th, but the number of 5.6 and 5.7GHz CCDs is so low that it would've been a paper launch. That's the only reason I could imagine where this launch window makes sense.
It's still stock, just a non-thermally limited one (and slightly more efficient operating condition).
True. I am not denying that. It’s just AMD needs to have better communication. On July 15th they said it’s launching by 31st of June. So in just one week they found out that testing wasn’t done properly.No, CPU design and manufacturing is just complicated.
These companies are packed with talented and highly professional people, yet things go wrong from time to time. This (Zen 4/RPC) gen should be very indicative of that.
That s not a more efficient condition, rather the contrary since mosfets are slower at very low temps, the higher the temp the more the transconductance up to a given temp, generaly in the 100-120°C range, at wich the conduction and speed at a given voltage start to decline, it s just that under LN2 you wont overheat the chip with a hugely over specced TDP.
Actually at -100°C you need to pump higher voltage to reach the same frequencies than at 50°C, and as already said i dont believe that the 9950X has only 3.85% better 7 Zip perf than the 7950X, this very number just doesnt make sense.
Edit : Methink that in reviews the CBR23 score will be up to 10% higher and the 7 Zip one 15-20% higher, AMD stated perf improvement over the 7950X is 22%.
Ryzen 9000/AI 300: Details zu Zen 5, RDNA 3.5, Zen 6(c) & Zen 7
Ryzen 9000 kommt am 31. Juli. Schon heute gibt es weitere technische Details zu den Desktop-CPUs und Ryzen AI 300 Strix Point für Notebooks.www.computerbase.de
22% is for Blender, not CB R23. They gave a specific 17% IPC uplift for R23. That will not change. At least for ST, all you need to do is extrapolate the score vs 7950X and you will have the score for 9950X. 2050*1.17= ~2398That s not a more efficient condition, rather the contrary since mosfets are slower at very low temps, the higher the temp the more the transconductance up to a given temp, generaly in the 100-120°C range, at wich the conduction and speed at a given voltage start to decline, it s just that under LN2 you wont overheat the chip with a hugely over specced TDP.
Actually at -100°C you need to pump higher voltage to reach the same frequencies than at 50°C, and as already said i dont believe that the 9950X has only 3.85% better 7 Zip perf than the 7950X, this very number just doesnt make sense.
Edit : Methink that in reviews the CBR23 score will be up to 10% higher and the 7 Zip one 15-20% higher, AMD stated perf improvement over the 7950X is 22%.
Ryzen 9000/AI 300: Details zu Zen 5, RDNA 3.5, Zen 6(c) & Zen 7
Ryzen 9000 kommt am 31. Juli. Schon heute gibt es weitere technische Details zu den Desktop-CPUs und Ryzen AI 300 Strix Point für Notebooks.www.computerbase.de
Static power is reduced because the lower transconducatnce imply lower leakage but that also mean lower speed at a given voltage.Temperature decrease reduces all of the conductor and channel resistances as well as decreases the static power consumption of the FETs. So your RC delay goes down and your static power goes down. In turn, the CPU will consume less power as the temperature is decreased, all else being equal, and will lead to more efficient performance by the CPU.
Without CB testing a 9950x, you shouldn't compare their 7zip results with AMD's as evidence that AMD's stock test is under performing. Too many variables come into play.
The 22% in the slide i linked is a global number comprising an average of several benches, that s in AMD s footnotes.22% is for Blender, not CB R23. They gave a specific 17% IPC uplift for R23. That will not change. At least for ST, all you need to do is extrapolate the score vs 7950X and you will have the score for 9950X. 2050*1.17= ~2398
Static power is reduced because the lower transconducatnce imply lower leakage but that also mean lower speed at a given voltage.
Beside the conductors resistance shouldnt be significant at currents required to hit 5GHz, the RC delay getting lower wont automaticaly compensate for the lower transconductance that will increase the time required to charge the parasitic capciatances of all kind (wich are left unchanged by the low temp).
Some people on Xitter are saying it might be a packaging issue, whatever that means. Obviously, that's not in reference to the box the CPU comes in, although it would be funny if the issue was to fix a typo on the box (gotta remove that "+32% IPC" claim )