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

cHk4 · 30 Sep 2022 at 16:04

I’ll be honest I cancelled my order earlier as I phoned up and the ram I wanted they thought wasn’t in until next week… anyway hit refresh and saw it was in stock so got me 64GB and a Saturday delivery!

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www.overclockers.co.uk

Still nervous going from blue to red but when the 7950x3D comes out I think I would regret having gone 13th gen.

humbug · 30 Sep 2022 at 16:12

cHk4 said:
I’ll be honest I cancelled my order earlier as I phoned up and the ram I wanted they thought wasn’t in until next week… anyway hit refresh and saw it was in stock so got me 64GB and a Saturday delivery!

Corsair Dominator Platinum RGB EXPO 32GB (2X16GB) DDR5 PC5-48000C36 6000MHz Dual Channel Kit - Black (CMT32GX5M2D6000Z36)

Order Corsair Dominator Platinum RGB EXPO 32GB (2X16GB) DDR5 PC5-48000C36 6000MHz Dual Channel Kit - Black (CMT32GX5M2D6000Z36) now online and benefit from fast delivery.

www.overclockers.co.uk

Still nervous going from blue to red but when the 7950x3D comes out I think I would regret having gone 13th gen.

Why are you nervous? I went from a period of Intel back to AMD in 2017, at the time a 4690K to a Ryzen 1600, then Ryzen 3600 and now 5800X for two years, i have no regrets. in 25 years of owning all sorts of CPU's the 5800X is my favourite. Its infinitely tweakable, as easy or as hardcore as you like and it just does what its supposed to do without ever complaining.

LtMatt · 30 Sep 2022 at 16:26

Soon.

VortexA1 · 30 Sep 2022 at 16:31

Bencher said:
Nope, that's marketing nonsense that amd came up with to not get any flak about these scorching hot cpus. If you cool them properly, they won't boost until 95c, just like any other CPU. The problem here is that's its almost impossible to cool them properly at these monstrous wattages and with that heat density, so in most cases it will thermal throttle before it power throttles.

TLDR : Zen 4 works like any other CPU in the history of CPUs pretty much, it boosts until it powers or thermal throttles, whichever comes first, it's just very very hard to cool so usually thermal throttling comes first.

no it isn't 'monstrous' heat. the new 7000 series doesn't work on the principle you think. I have already linked a review with jayzcents to explain at least in part. You don't seem to realise how they work and come across as a downer towards them.

Steedie · 30 Sep 2022 at 16:40

humbug said:
That's 91% of the performance for 55% of the power.

Yeah, well chuffed with that. I will play around tonight with just setting the thermal limit with a negative voltage offset to see if that's any better

I still want new RAM though, this Kingston kit is Micron stuff so it maxes out at 5600 which is does just fine at the same timings. I'm going to get the Corsair Dominator 6000 kit, not that it will make much of a difference with the undervolt I'm running, but still...

humbug · 30 Sep 2022 at 16:48

Steedie said:
Yeah, well chuffed with that. I will play around tonight with just setting the thermal limit with a negative voltage offset to see if that's any better

I still want new RAM though, this Kingston kit is Micron stuff so it maxes out at 5600 which is does just fine at the same timings. I'm going to get the Corsair Dominator 6000 kit, not that it will make much of a difference with the undervolt I'm running, but still...

If you can get it to 95% of the performance for 60/65% of the power then then you really do win.

Clearly these are incedibly effisient but AMD have pushed them for every point they are worth, which is a trend these days and you might loose if you don't.

uscool · 30 Sep 2022 at 16:56

Bencher said:
Nope, that's marketing nonsense that amd came up with to not get any flak about these scorching hot cpus. If you cool them properly, they won't boost until 95c, just like any other CPU. The problem here is that's its almost impossible to cool them properly at these monstrous wattages and with that heat density, so in most cases it will thermal throttle before it power throttles.

TLDR : Zen 4 works like any other CPU in the history of CPUs pretty much, it boosts until it powers or thermal throttles, whichever comes first, it's just very very hard to cool so usually thermal throttling comes first.

Totally incorrect stop making stuff up please

If that was the case why isn't the scores dropping over longer runs the clocks are staying the same

Please stop spreading false information

700 seconds doesnt drop frequency

95°C is Now Normal: AMD Ryzen 9 7950X CPU Review & Benchmarks

Support our in-depth testing! Grab a 3D Component Coaster Pack https://store.gamersnexus.net/products/3d-coaster-pack-4-component-coasters on the GN store, o...

youtu.be

gbgt2 · 30 Sep 2022 at 16:57

Journey said:
They are designed to take advantage of all of the thermal headroom, and will keep boosting until they hit that 95c, however that is done with a largely aggressive voltage boost algo, and depending on silicon lottery similar results can be achieved (to stock perf) with manual adjustments to the voltage, resulting in lower temps and much lower power draw.

Which makes total sense for enthusiasts. But I see a lot of comments like "non-enthusiasts won't know how to do that" and "those temps are high for gaming". Non-enthusiasts don't need to know how to make manual adjustments and those stock temps aren't high for gaming. Stock it's working exactly as AMD designed it to work which is to boost until it hits 95c regardless of how good (or not) the cooling is. Gimping performance to get lower temps/power doesn't make any sense. If you can get the same performance with lower temps/power then go for it.

LtMatt · 30 Sep 2022 at 17:02

The only new things not going into this build will be a lightly used 2TB SN850 and a Sapphire 6950 XT Toxic LE. All set now to build it tomorrow. :cool:

Bencher · 30 Sep 2022 at 17:13

uscool said:
Totally incorrect stop making stuff up please

If that was the case why isn't the scores dropping over longer runs the clocks are staying the same

Please stop spreading false information

700 seconds doesnt drop frequency

95°C is Now Normal: AMD Ryzen 9 7950X CPU Review & Benchmarks

Support our in-depth testing! Grab a 3D Component Coaster Pack https://store.gamersnexus.net/products/3d-coaster-pack-4-component-coasters on the GN store, o...

youtu.be

Why would they drop over longer periods of time? My 12900k at 280w barely thermal throttles at 100c but the scores stay consistent. Zen 4 works exactly like any other cpu, it's just very hard to cool so it hits a thermal limit before a power limit usually.

Gibbo · 30 Sep 2022 at 17:45

The 6000MHz C30 Dominator and Vengeance RGB kits now online.

Stock due in about a weeks time.

I shall split the section up next week to speed categories like we have for DDR4 to make life a bit easier browsing.

cHk4 · 30 Sep 2022 at 17:45

humbug said:
Why are you nervous? I went from a period of Intel back to AMD in 2017, at the time a 4690K to a Ryzen 1600, then Ryzen 3600 and now 5800X for two years, i have no regrets. in 25 years of owning all sorts of CPU's the 5800X is my favourite. Its infinitely tweakable, as easy or as hardcore as you like and it just does what its supposed to do without ever complaining.

Hearing stuff like that is reassuring.

I think it’s just because I had AMD a long time ago had a few issues, went intel and it was always pretty smooth sailing. So guess it’s more fear of the unknown.

humbug · 30 Sep 2022 at 17:46

cHk4 said:
Hearing stuff like that is reassuring.

I think it’s just because I had AMD a long time ago had a few issues, went intel and it was always pretty smooth sailing. So guess it’s more fear of the unknown.

That's perfectly understandable, AMD have had problems in the past but all that is long gone.

LtMatt · 30 Sep 2022 at 17:47

humbug said:
That's perfectly understandable, AMD have had problems in the past but all that is long gone.

Yeah fear of the unknown is not unreasonable to be fair.

I haven't touched an Intel system since Ryzen 1000 launched, so I'd probably be the same switching over now.

RavenXXX2 · 30 Sep 2022 at 18:53

LtMatt said:
The only new things not going into this build will be a lightly used 2TB SN850 and a Sapphire 6950 XT Toxic LE. All set now to build it tomorrow.

[/spoi

nice, do you run an oled? if so can you test if the igpu is capable of 4k 120Hz RGB.

LtMatt · 30 Sep 2022 at 19:23

RavenXXX2 said:
nice, do you run an oled? if so can you test if the igpu is capable of 4k 120Hz RGB.

I do, but I already know the full specs of the integrated GPU so I can just tell you now.

Display output support:
HDMI® 2.1 with: HFR, 48Gbps FRL, DSC, HDR10+, and VRR extensions
DisplayPort™ 2.0 Ready with: Adaptive Sync, DSC, UHBR10, and HDR extensions

Hardware encode/decode capabilities:
Encode: H.265 10bpc/8bpc, H.264 10bpc/8bpc
Decode: AV1 10bpc/8bpc, VP9 10bpc/8bpc, H.265 10bpc/8bpc, H.264 10bpc/8bpc

RavenXXX2 · 30 Sep 2022 at 19:27

Yeah but can you confirm, UHD 770 is listed as hdmi 2.1 but can't do 4k 120 rgb. AMD lists it as 4k 60hz capable. Could be limited to 4k 60hz. Cheers.

LtMatt · 30 Sep 2022 at 19:30

RavenXXX2 said:
Yeah but can you confirm, UHD 770 is listed as hdmi 2.1 but can't do 4k 120 rgb. AMD lists it as 4k 60hz capable. Could be limited to 4k 60hz. Cheers.

Where does it list it?

As far as I understand it should be 4K120HZ. However, this is dependant on the motherboard port supporting HDMI 2.1. If the HDMI port is only 2.0, it'll be 4K60HZ.

I'm building the system tomorrow, so I'll test it out regardless and let you know if it works or not.

Richdog · 30 Sep 2022 at 19:35

Big Zen4 review roundup on Reddit analyzing all of the data. End result? The 58003DX is as fast as any other CPU at gaming. https://www.reddit.com/r/hardware/comments/xs82q2/amd_ryzen_7000_meta_review_25_launch_reviews/

RavenXXX2 · 30 Sep 2022 at 19:36

In their slides. Main thing is 120hz at rgb/444 chroma. uhd 770 can do 120hz but not rgb.

LtMatt said:
Where does it list it?

As far as I understand it should be 4K120HZ. However, this is dependant on the motherboard port supporting HDMI 2.1. If the HDMI port is only 2.0, it'll be 4K60HZ.

I'm building the system tomorrow, so I'll test it out regardless and let you know if it works or not.

AMD confirms Ryzen 7000 integrated RDNA2 graphics features - VideoCardz.com

AMD Ryzen 7000 RDNA2 GPU features confirmed AMD Ryzen 7000 are the first desktop Ryzen non-G series to feature RDNA2 graphics. Ryzen 7000 iGPU has powerful video decoding and display output specs. AMD today reaffirms that the built-in RDNA2 GPU has two Compute Units. As mentioned before, the...

videocardz.com

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

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