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OcUK Amd Zen4 official review thread

I'll add this before anyone else does, we did hit Nvidia with it with the 40 series and sadly AMD with the CPUs need the same..

6urw71.jpg



Nice CPUs but way too hot and too much power use, too expensive motherboards and DDR5 prices still too high. 7950x with less power use would have been really nice but clearly we are now at the levels of more power = more performance so will wait till they figure out these architectural power issues they are all having it seems now. The PC is turning into a room heater now with these silly power levels being used by the cpus and gpus now.

Lets hope things are better for their gpus.. so far not massively impressed by the cpus considering the power use. Feels a bit like more bad news added to the 40 series news so far to me. The short version of AMD cpus are basically 100% more power use than a 5950x = 7950x 50%-ish faster in multithread in certain apps.

Nice gains but using twice the power for a 50%-ish gain... in my book sadly that's a fail for AMD, but compared to Intel power use and performance it looks like a win just only..

AM5 as a platform and cpus to come in the future will be a winner for sure, just we need to wait a little longer for cpus it seems if still on 5000 series cpus, but for the people that need 50% multithread increase for their app that gives that it's a winner, but for most of us on this forums that are gamers, well not really worth it to update from AM4 and a 5000 series cpu yet.

Question is ... is Moore's Law dead now or just poor inefficient designs ?
 
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Purgatory said:
I'll add this before anyone else does, we did hit Nvidia with it with the 40 series and sadly AMD with the CPUs need the same..

6urw71.jpg



Nice CPUs but way too hot and too much power use, too expensive motherboards and DDR5 prices still too high. 7950x with less power use would have been really nice but clearly we are now at the levels of more power = more performance so will wait till they figure out these architectural power issues they are all having it seems now. The PC is turning into a room heater now with these silly power levels being used by the cpus and gpus now.

Lets hope things are better for their gpus.. so far not massively impressed by the cpus considering the power use. Feels a bit like more bad news added to the 40 series news so far to me. The short version of AMD cpus are basically 100% more power use than a 5950x = 7950x 50%-ish faster in multithread in certain apps.

Nice gains but using twice the power for a 50%-ish gain... in my book sadly that's a fail for AMD, but compared to Intel power use and performance it looks like a win just only..
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The only time Greta seems right.
 
Looking at benchmarks, I don't regret upgrading from 5800X to 5900X few days ago, I don't like how much more power these new CPUs consume, and add in the power consumption of new GPUs coming out and it's just a bit too much.

The iGPU performance seems decent for only having 2 CU, it's not too far behind Vega 8 iGPU from what I can see, which is much better than I expected.
 
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The temperature thing is interesting. They target 95c and will keep pumping power and clocks till it gets there. Be curious to see what happens with a fairly basic cooler, my guess is power consumption would come down pretty quickly.

Thinking about it I bet budget end motherboards would also hit power limits much sooner than the high end boards all the reviews are on.

I think its quite an interesting situation.
 
rare said:
So my first gut reaction is, if you are in to any kind of productivity the top end chips are absolutely mega and make a very good case for themselves in that context.

If you only play games and you are already on AM4, buy a 5800X3D. Seems pointless at this moment in time changing platforms when pretty much any decent AM4 board will take a 5800X3D. None of the other new platform features really mean anything meaningful for games yet and probably won’t for a while.

If you own Alder lake, just upgrade to raptor lake.

Otherwise it looks expensive, new CPU, expensive motherboards, new ram. Personally I would wait it out, see what happens next year, unless you are on a really old platform.
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After reading the reviews I've come to the same conclusion that this is the cheapest most cost effective upgrade.

So going to buy a 5800X3D to replace the 5900X in my gaming PC tomorrow.
Then the 5900X will move over into my daily driver replacing a 3900X, and the 3900X will be sold to claw back some cash.

Will end up costing me around £200 I figure.

And that's me sorted until the Zen 4 3DVcache CPUs drop next year, simples. :cool:
 
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The Old School Gamer said:
After reading the reviews I've come to the same conclusion that this is the cheapest most cost effective upgrade.

So going to buy a 5800X3D to replace the 5900X in my gaming PC tomorrow.
Then the 5900X will move over into my daily driver replacing a 3900X, and the 3900X will be sold to claw back some cash.

Will end up costing me around £200 I figure.

And that's me sorted until the Zen 4 3DVcache CPUs drop next year, simples. :cool:
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Sounds good mate! By the time the 3D versions come round at least DDR5 will be plentiful and you will know the full lay of the land with motherboards. The 5800X3D will be an amazing CPU for years yet when it comes to gaming.
 
Looks good, but nothing that makes me remotely want to upgrade. The plan still is to wait another 4-5 years where I can go for another 12 core cpu that has double the single thread performance :)

AM6 platform is probably when I would look to upgrade or pick up the last gen of AM5 used or something.
 
TNA said:
Looks good, but nothing that makes me remotely want to upgrade. The plan still is to wait another 4-5 years where I can go for another 12 core cpu that has double the single thread performance :)

AM6 platform is probably when I would look to upgrade or pick up the last gen of AM5 used or something.
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I was actually thinking the same after seeing the reviews hopefully can hold out till AM6 or what intel has currently have 5900x

Most likely drop in another GPU upgrade (not 40 series) before platform change
 
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95 degrees dam that's a toasty one. I know it's rated to run at that, but the cooling will be a huge factor now for people to consider too. Case fans to get the heat out of the case, unless you're open case, are also going to be a factor too.

Sticking to my 5900x though until the AM5 platform matures and DDR5 comes down more.
 
Wow these seem bad, barely competitive with alderlake and you can turn your heating off in the winter
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12700k is looking like it was a super good purchase :D
 
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Is the temp actually an issue given as it's designed run like that? So long as you don't need your fans at 100% to keep it like that, I don't see an issue. Although it would hold me back if that was the case, noisy cooling is a deal breaker for me.

I think I may hold out for a used 5950X bundle to upgrade my 6700k. I game & 3D render but I don't think this is worth a ground-up rebuild yet (I'd need new PSU, case, AIO etc)
 
Having seen a few more reviews the power efficiency is impressive. If you don't need the absolute fastest an under volted chip could be very nice.
 
arknor said:
Wow these seem bad, barely competitive with alderlake and you can turn your heating off in the winter

12700k is looking like it was a super good purchase :D
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Temperature does not equal power.

If I light a match it can be over a thousand degrees. Does that mean I can turn off the heating since that's a higher temperature than my central heating?

You need to look at the actual power consumption.
 
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