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*** AMD "Zen 4" thread (inc AM5/APU discussion) ***

LtMatt said:
That's interesting and wets my appetite for testing when i get my 7950X, as my 5800X3D was almost double the (FPS) performance of the 12900K in Valorant, but Ryzen 7000 appears to be even faster than the 5800X3D. Valorant is super CPU limited.

5800X3D

12900K
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Interesting. So the 12900k draws 70 to 85w in valorant but reviewers are using the 12900ks at 200w to prove a point. Lol incredible stuff
 
Steedie said:
Slightly annoyed now that I only ordered 5200MHz RAM, seems like even if you're not overclocking, the stuff to go for is 6000MHz to keep a 1:1 ratio. Bugger. That'll learn me for rushing my purchase
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The Auto setting (for infinity fabric) provides optimal performance and will keep the memory controller and DRAM at a 1:1 ratio, with the infinity fabric at a 3:2 ratio.

Here are some examples:
  • DDR5-4800 = 2400MHz RAM, 2400MHz IMC (1:1 ratio) and 1600MHz Fabric (3:2 with mclk)
  • DDR5-5200 = 2600MHz RAM, 2600MHz IMC (1:1 ratio) and 1733MHz fabric (3:2 with mclk)
  • DDR5-6000 = 3000MHz RAM, 3000MHz IMC (1:1 ratio) 2000MHz Fabric (3:2 with mclk)
Once you push the memory frequency above 6000Mhz the Auto ratio will change, and this is dependant on the memory frequency used. Memory clock (uclk) will switch to 1:2 ratio with memory frequency, and the Fabric ratio will fluctuate to maintain 1850-2100MHz range. This is why the sweet spot is 6000Mhz. However, that does not mean that there is no benefit to going above that on Ryzen 7000, but YMMV. For the best and most reliable performance out of the box, 6000Mhz with Auto infinity fabric is where you want to be.
 
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Steedie said:
Ok great, thanks again Gibbo. If it matters, I went for the Kingston FURY Beast 32GB (2x16GB) DDR5 PC5-41600C40 5200MHz, have you had much chance to test these yet to see if they have any headroom?
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According to Igor's Lab, Zen 4 will generally only be required to reduce the memory controller ratio at speeds above 6400 MT/s, depending on RAM setup.

At the moment though, it looks like speeds above 6400 are very difficult to achieve, whatever config is used.
 
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Bencher said:
I agree, avx increases performance for both. Intel goes up to more than 70, 7950x goes up to 56.
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you kind of keep going back to an edge case. The AVX-512 support sucks on the 12th gen. 56 FPS is decent on Zen 4, as some have hinted, 60+ may be doable.
 
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Steedie said:
Ok great, thanks again Gibbo. If it matters, I went for the Kingston FURY Beast 32GB (2x16GB) DDR5 PC5-41600C40 5200MHz, have you had much chance to test these yet to see if they have any headroom?
Click to expand...

They are likely going to be Micron, maybe Samsung IC's if you are lucky. So expect 5600/6000 at best, and not amazing timings. You want the Corsair 5600, or even the Kingston 5600 (Hynix M die) if you want to OC them beyond 6000 MT/s.
 
Bencher said:
Interesting. So the 12900k draws 70 to 85w in valorant but reviewers are using the 12900ks at 200w to prove a point. Lol incredible stuff
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it was 1 reviewer and I only posted to show what can be done with tweaking zen4 now more are starting to play with it , hope they let you tweak the 3d part this time but doubt it wondering what the prices will be for the B650/B650e boards thinking b650e as you still get pcie 5.0 and 1 m.2 gen5 AMD dont restrict any form of tweaking in the bios
 
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tbf, 16gb modules are expensive still, especially at higher frequencies. I would just try to get the most out of the 5200 MT/s modules.

It all depends on your budget, really.
 
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uscool said:
it was 1 reviewer and I only posted to show what can be done with tweaking zen4 now more are starting to play with it , hope they let you tweak the 3d part this time but doubt it wondering what the prices will be for the B650/B650e boards thinking b650e as you still get pcie 5.0 and 1 m.2 gen5 AMD dont restrict any form of tweaking in the bios
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Is there a point in breaking the 1k fps barrier?
 
g67575 said:
tbf, 16gb modules are still expensive still, especially at higher frequencies. I would just try to get the most out of the 5200 MT/s modules.

It all depends on your budget, really.
Click to expand...

No the are not, you can get a 5600 MT/s 32GB kit for ~£170, as already pointed out some of these kits have Hynix IC's so will easily go to 6400 MT/s. The Kingston KF556C36BBEK2-32 are M-die and priced below £170 as well.
 
Journey said:
No the are not, you can get a 5600 MT/s 32GB kit for ~£170, as already pointed out some of these kits have Hynix IC's so will easily go to 6400 MT/s. The Kingston KF556C36BBEK2-32 are M-die and priced below £170 as well.
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This sounds reasonable. I was actually just looking at the KF556C36BBEK2-32 modules.

Maybe you could point out which ones use Hynix ICs?

I would call the price affordable at around £150...
 
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Bencher said:
Again, wtf are you talking about. I was QUOTING the review grim5 posted and people just like you are attacking me. Just because you dont like the results the review you posted are showing. That's actually insane.
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Has it ever even occirred to you taht when so many people think you are wroing there may be a chance that you are wrong? Plus you just go on and on, it never stops.
 
Bencher said:
Is there a point in breaking the 1k fps barrier?
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almost feels like you are disappointed let me guess why because its AMD also thats like saying lower the performance bump gen on gen we would be happy for less increases , lets go back to the days with lower increases gen on gen because whats the point getting these big increases this is what competition brings we should all be happy :) pleased what Intel did with the pricing hopefully makes AMD rethink pricing :)

dont get this being total fanboy of intel
if friend / family wanted me to do budget gaming build I would be looking at the 13600k with b550 board ddr4
 
cliffy said:
Has it ever even occirred to you taht when so many people think you are wroing there may be a chance that you are wrong? Plus you just go on and on, it never stops.
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But people don't disagree with me, they disagree with the review they themselves posted. Take for example the rpcs3 numbers. The review grim5 posted says that basically the 12900k just caps on the 7950X. I quoted the numbers from the actual review and people started attacking me. Like what the hell??
 
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