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

Of course, it would be nice if AMD would soften their prices before I do that build because it's awkward that I can put together a competitive 13600k system for hundreds of pounds less. Sad news for everyone if that's not going to happen - probably most for AMD. It's tough trying to sell a product for more than its perceived value! The reasons for the cost don't matter, it's how much everyone else can deliver something similar for that has to set your pricing.
Value is value. If it's offering the same performance as a cheaper platform but charging more, then it's poor value.
Intel is currently the way to go for people that don't care what company they throw their money at. Both companies will always have the fans though, and I'm guessing that will help a little.
 
240mm AIO on the intake will do great, it is still a 125w class CPU.
My 5800X is cooled by 240mm AIO in a more cramped case. Not an issue as long as it is getting cool outside air through radiator. And I am considering upgrade to 7700X in same Rajintek Thetis case.

Good to know :) A 95W eco mode is of course available for a 7700X, but I don't think anyone's done any really good benchmarking of the 7000s when you put the power limiter on. Will wait a while and hope something shows up. I'm starting to feel like Zen 4 might actually shine when you power limit it, a few have reported better gaming performance because the temps drop and the clocks go up...

Gigabyte B650M elite ax?

I was thinking the Asus Gene, that thing looks overengineered to heck and should be solid for however many generations land on AM5 :) Although I am in theory happy with a B650, I'm picky and immediately exclude anything that puts an m.2 slot behind the GPU and doesn't provide a heatsink. Been in that situation before, my poor 960 pro was hitting 90 degrees under gaming load because of that placement and lack of anywhere to dump the heat! I think it's the Asrock mATX board that puts the 2nd m.2 down in the far right corner which is very sensible, but then goes on to pair good layout with being the cheapest board with the weakest components.

The Gene is stupid expensive though, costs more than the CPU! I may yet settle for a regular ATX build because I'm not sure the price justifies the satisfaction of a smaller PC. Maybe there will be a B650 Gene later?
 
Picked up a 7700x and MSI MAG Tomahawk for £638. Makes the CPU around £90 cheaper bought in the bundle (or vice versa). First build in around 15 years, so I'm looking forward to putting it together. Got an Arctic Liquid Freezer ii 280 to go with it, just waiting on decision on a GPU before I start the build. Eyeing up the 6800xt at the moment, waiting for the new AMD cards to come out to see what happens to the prices.
 
I settled with -12 curve editor magnitude on all cores for my Ryzen 7700X in the end.

Load Line Calibration at the highest /most stable setting (Level 1 on ASRock boards) for both the Vcore and SOC voltage.

90 Celsius PBO temp limit.

4+ hours tested in P95 AVX-512 enabled

4+ hours tested in P95 AVX disabled.

I hope that saves a few people some time mucking about in their BIOS! I feel as if I've tested just about every possible option by now...

With these settings, in the CPU-Z benchmark I get 5.2Ghz all core, 5.3Ghz all core with only 8 threads active.

Note - Minus 13 all core resulted in instability after 1-2 hours of testing.
 
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What kind of curve editor settings have guys managed to get stable in P95 with a 7700X? I'd guess most people are opting for an AIC water cooler, rather than an air cooler?

It looks like PCIe gen 5 is not needed for RDNA3 or RTX 4000 series cards... I suppose it might eventually improve performance a little bit? But any performance improves would come perhaps in 2-3 years time.
 
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Installed the Asus armoury crate thing. It locked my top fans at ,100% and messed up the rest. Windows now ignoring bios q fan settings. Then realised I had a dodgy cpu fan, then realised I wouldn't be able to fit an AIO. Took it all apart, ordered O11D Evo like I originally planned. Didn't even get as far as messing with the CPU settings.
 
I believe this is eco mode - enforces a power limit (e.g. 65W or 105W) to help keep thermals under control. There's not much hard data around on it right now, but there's suggestions that people only drop 5% MT performance in exchange for a huge power and temperature drop.

On that note, maybe this is the thread to ask; anyone know whether a 7700X can be cooled adequately in a smaller case like this one?


I've had a hankering to do a micro atx build for years, and for once there is at least one good mATX motherboard available so maybe this is the time. I would be willing to consider permanent eco mode if the performance loss isn't massive (and I don't think it will be) and tend to undervolt stuff on instinct. I believe that case could handle a Noctua D15S, or a 240mm AiO - is that going to work out?



Of course, it would be nice if AMD would soften their prices before I do that build because it's awkward that I can put together a competitive 13600k system for hundreds of pounds less. Sad news for everyone if that's not going to happen - probably most for AMD. It's tough trying to sell a product for more than its perceived value! The reasons for the cost don't matter, it's how much everyone else can deliver something similar for that has to set your pricing.

Gamers nexus did a good video testing performance of 7950x in 170w tdp vs 110w and 65w eco modes.

Edit - missed that it had been posted already
 
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Gamers nexus did a good video testing performance of 7950x in 170w tdp vs 110w and 65w eco modes.

Edit - missed that it had been posted already

That's quite ok, I missed the original posting so I shall go look it up now! Thanks for the tip :D

*edit* Dropping a 7950X to 105W mode and only dropping 300mhz while cutting off 34 degrees C seems absurdly good. The efficiency rockets up with only that modest drop and you still have a 16c/32t cpu :eek:
 
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That's quite ok, I missed the original posting so I shall go look it up now! Thanks for the tip :D

*edit* Dropping a 7950X to 105W mode and only dropping 300mhz while cutting off 34 degrees C seems absurdly good. The efficiency rockets up with only that modest drop and you still have a 16c/32t cpu :eek:

Temp drop doesn't matter, power savings do.

Temperature really only matters when it's causing you to lose performance but that's not the case with zen4; temps are irrelevant unless you are losing performance. Eco mode power savings are worth discussing
 
Temp drop doesn't matter, power savings do.

Temperature really only matters when it's causing you to lose performance but that's not the case with zen4; temps are irrelevant unless you are losing performance. Eco mode power savings are worth discussing

Tbh, I prefer a PC that doesn't heat the room so I tend to think in terms of thermals :D But fair, power consumption is what leads to heat generation.

Either way, it really feels like the 7000 series has been pushed past it's actual 'intended' speed when there's so much efficiency gained by giving up just 5% performance. But I guess that's what happens when all marketing focus goes on the performance numbers. We've been here a few times over the decades but it seems to be particularly savage right now :cry:
 
Tbh, I prefer a PC that doesn't heat the room so I tend to think in terms of thermals :D But fair, power consumption is what leads to heat generation.

Either way, it really feels like the 7000 series has been pushed past it's actual 'intended' speed when there's so much efficiency gained by giving up just 5% performance. But I guess that's what happens when all marketing focus goes on the performance numbers. We've been here a few times over the decades but it seems to be particularly savage right now :cry:

Seems like Intel, Amd and Nvidia are just throwing power at things this iteration.
 
Can anyone with a Zen4 CPU try this benchmark:

We already have a Core i5 13600K in it(but with DDR4).
 
Set my 7950x to Eco Mode 105w. Weirdly, it performs better than setting the power limit manually to 125w with a negative 10 offset on all cores.
 
Set my 7950x to Eco Mode 105w. Weirdly, it performs better than setting the power limit manually to 125w with a negative 10 offset on all cores.

Probably because setting 125w locks to 125w but the 105w TDP profile actually allows it to pull up to 160w so since the 105w profile actually has a higher power limit it's gonna be faster
 
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Probably because setting 125w locks to 125w but the 105w TDP profile actually allows it to pull up to 160w so since the 105w profile actually has a higher power limit it's gonna be faster
Ah I just assumed 105w limits it to 105w. Interesting. Thanks :)
 
Sleep mode (S3 suspend to RAM) beta BIOS update is available on some ASRock AM5 boards now :)

https://www.asrock.com/MB/AMD/B650 PG Lightning/index.asp#BIOS

I will wait for the full release BIOS version, then try to update via ASRock's APP Shop.

Has anyone used the APP Shop (Windows) to update a BIOS before?

Or, would it be better to flash it via a FAT32 USB stick instead?

I'm hoping there will be better support for 6400 MT/s DDR5 modules soon (not that it makes that much difference).

Note - In command line, you can run this command, to check support for sleep mode:
Powercfg /a
 
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It looks like it might be possible to disable AVX2/ AVX512 on some AM5 motherboards soon:

Potentially useful if you want to achieve higher stable clock frequencies, or just avoid higher CPU temps in general...
 
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