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AMD choice

sargan

sargan

sargan

Associate
Joined
16 Feb 2019
Posts
141
Intend this time (first time) to move off Intel to AMD
Use is for video editing / rendering inc 4k at 100fps on Davinci.

Unsure whether to go for AMD 9900X or 7900X
Performance seems very similar with 9900 only 6% better
The 9900X being Zen 5 Granite Ridge is newer technology and does have 50W lower TDP

Same cache, cores, threads etc.


The 9900X costs about 30% more, what is the view - jump in and get 9900X as power saving will pay for the extra cost in 2-3yrs, and getting later technology chip
 
Very hard to give advice on these CPUs at the moment, because their performance is not settled. It does well in some tasks, e.g. V-Ray, but in some apps there's next to nothing. You'd also see decent gains in anything that uses AVX-512, like AV1 encoding.

www.pugetsystems.com

AMD Ryzen 9000 Content Creation Review

Introduction Following some launch delays, AMD has now released their entire AMD Ryzen 9000 Series of processors. These CPUs are based on AMD’s new Zen 5
www.pugetsystems.com www.pugetsystems.com

If time is money (it often is for video editors/artists) then I'd get it anyway and hope for future gains, though it does depend if there's somewhere better you can invest that money in your build for more performance, like RAM or graphics.
 
Similar spot here. Struggling to figure out what I should do. Been starting at review videos and benchmarks for days.

I'm sitting on a 3700x and generally quite happy with it. However I need a core # and memory (64gb) upgrade as I'm doing a lot of ML training in python for my PhD, and my current CPU doesn't quite cut it.

I value good efficiency and low noise. My cooler is a Corsair h115i pro 280mm AIO, which I don't particularly want to change. I don't think a bigger one will fit in my Meshify C case. I'm reluctant to get a beefy CPU (>120w) that may thermal throttle and sound like a helicopter.

Can't decide whether i should just drop in a 5950x (why is the 5900xt more expensive?!), for a hassle free upgrade.

The chip I like the most is the 7900 (non x), it seems unbelievably efficient, similar performance to the 5950x, but much lower power. However it requires as new motherboard and more expensive memory, just to save 40 watts. Doesn't seem worth.

Alternatively I could jump to the 9900x, but I'm concerned that I may be disappointed by the noise and temps, and it doesn't seem to have the undervolting potential of the previous generation.

105w 5950x?
65w 7900?
120w 9900x?
 
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sargan said:
Intend this time (first time) to move off Intel to AMD
Use is for video editing / rendering inc 4k at 100fps on Davinci.

Unsure whether to go for AMD 9900X or 7900X
Performance seems very similar with 9900 only 6% better
The 9900X being Zen 5 Granite Ridge is newer technology and does have 50W lower TDP

Same cache, cores, threads etc.


The 9900X costs about 30% more, what is the view - jump in and get 9900X as power saving will pay for the extra cost in 2-3yrs, and getting later technology chip
Click to expand...
Get a 7950X and sell the game codes so its around the same price as a 9900X but has 4 extra cores. Run it at ECO 105W and it would probably use less power than the 9900X too.
 
FredFlint said:
Get a 7950X and sell the game codes so its around the same price as a 9900X but has 4 extra cores. Run it at ECO 105W and it would probably use less power than the 9900X too.
Click to expand...
Even though 7950 is about £50 more you think it a better value for money CPU ?
 
FredFlint said:
In my opinion, the 7950X is the best value AMD chip. It can be found f
Click to expand...
I had assumed that Zen5 would be better as architecture nearly 2 years further on, but comparison shows performance is better (assume the 16 cores) the negative seems to be the 170W.
Certainly something for me to consider.
 
sargan said:
I had assumed that Zen5 would be better as architecture nearly 2 years further on, but comparison shows performance is better (assume the 16 cores) the negative seems to be the 170W.
Certainly something for me to consider.
Click to expand...
The 9x chips have much faster AVX512 (20-50%), its just a bit buggy at this time. If the software uses AVX512, it could be worth spending extra. I run my 7950X using ECO 65W (max power of 88W), it looses ~20% multi-core performance at 65W, at ECO 105W (~130W max power) it looses ~ 5-10% but saves > 100W.
 
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FredFlint said:
The 9x chips have much faster AVX512 (20-50%), its just a bit buggy at this time. If the software uses AVX512, it could be worth spending extra. I run my 7950X using ECO 65W (max power of 88W), it looses ~20% multi-core performance at 65W, at ECO 105W (~130W max power) it looses ~ 5-10% but saves > 100W.
Click to expand...
OK ... Davinci does not use AVX512 instruction, so could be relevant in my choice.
 
Zoroaster said:
Do you have any links to 9000 undervolting potential?
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There aren't many curve optimiser reviews out there yet
One that goes deeper is skatterbencher getting -35 all core curve on 9700X https://skatterbencher.com/2024/08/...o-5860-mhz/#OC_Strategy_3_PBO_Curve_Optimized
And my own 9700X does -35 on all but one core. And thats with +200 clock ceiling. Without it I bet curve could go lower yet.

So if paired with lower power limit, it is hands down most efficient CPU out there
 
alec said:
There aren't many curve optimiser reviews out there yet
One that goes deeper is skatterbencher getting -35 all core curve on 9700X https://skatterbencher.com/2024/08/...o-5860-mhz/#OC_Strategy_3_PBO_Curve_Optimized
And my own 9700X does -35 on all but one core. And thats with +200 clock ceiling. Without it I bet curve could go lower yet.

So if paired with lower power limit, it is hands down most efficient CPU out there
Click to expand...
Thanks for your help, really valuable.

I'd almost decided on picking up a 7950x for 105w or 90w eco mode, but I'll have to rethink (Again!)
 
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