Ryzen 7950X3D with One CCD Disabled

[Max(IT)]

AMD is the new Intel: the delay of 7800X3D (the only reasonable choice in the lineup) is a shameful marketing move by Lisa Su.

 

[Rubinhood]

Qq, shouldn't the order between the "Relative Perf" and "Average FPS" columns match?
Or doesn't "Relative" depend on "Average"?

 

[HD64G]

Qq, shouldn't the order between the "Relative Perf" and "Average FPS" columns match?
Or doesn't "Relative" depend on "Average"?

View attachment 285701

You got it. If in some high-FPS games a CPU is 10% faster but in the rest the other CPU is 5% faster, the 1st one will win in the average FPS but lose on the performance % analogy.

 

[W1zzard]

But the high clocks are only for the cacheless CCD, if I understand correctly.

Correct, I explained this in the article, but seems nobody reads the text

A bit sad that Ryzen 7 5800X3D is missed in charts. It was interesting to compare with 7800X3D.

Added, charts are rendering right now, should be a minute or two

My biggest issue? Most of the FPS graphs for gaming exclude the 5800X3D. Why oh why?

No reason, just didnt think of it while selecting comparison entries, added now

Qq, shouldn't the order between the "Relative Perf" and "Average FPS" columns match?

Good observation, this is an artifact of the way the two charts are calculated.

For "Relative Performance" each number in each chart is multiplied so that "stock green bar" has a score of 100 in that chart, then everything is averaged
For "Average FPS", all the FPS are averaged, without scaling, so higher FPS numbers have a higher effect on the average

Neither approach is wrong. I guess I could use geomean for Average FPS, but that would give different rankings, too, and would be based on a more complex method than what I currently have. If someone can make good arguments for either or any other change I'm totally open to improving things

 

[Upgrayedd]

Curious as to what GPU usage looks like at 720p with RT in CP2077.

Is something finally able to feed the GPUs fast enough?

 

[Lew Zealand]

AMD is the new Intel: the delay of 7800X3D (the only reasonable choice in the lineup) is a shameful marketing move by Lisa Su.

This is business, not a charity. Recent releases:

Raptor Lake K SKUs first
Ryzen 7K X SKUs first
RTX 4080 and 90 SKUs first
Radeon 7900 SKUs first

You release your margin-leaders first to make money from eager early adopters.

 

[maximoor]

Great review! Very interesting. Was an excelent idea for an early look at 7800X3D!

 

[x4it3n]

Great review W1zzard ! Must have been a lot of work to pull out all those numbers and data so congratulations
It's crazy to see that Spider-Man, Far Cry 6, AoE 4 are still hugely CPU bottlenecked at 4K (whether it's with or without RT)... like +50% more fps, that's literally insane! It means that with Next-Gen GPUs we're going to have to upgrade our CPUs even for 4K Gaming lol

 

[Daven]

This test is very flawed. The 7800x3D is 700mhz slower than the 7950x3D so just disabling half the cores is not even close to an accurate comparison. AMD is doing that on purpose to keep the price to performance correct in their x3D lineup. It's the same reason they disable overclocking on them too.

The higher clock CCD is disabled. In this test, the clock speed is only around 200 MHz higher than the upcoming 7800X3D.

 

[BrwPcNrd87]

Very interesting article. Still going to stick with my 5800X3D for a LONG time, but I love the back and forth between Intel and AMD. Competition is a wonderful thing.

 

[Tek-Check]

This! i9 uses almost three times more power in games ~120W.
Suddenly, AM5 platform could become more interesting with 7800X3D.
It feels like Deja-vu from 5800X3D.

 

[THU31]

Interesting to see a CPU limit in many of those 4K results. There is no way CPUs will be able to keep up with GPUs. A 5090 will likely be severly bottlenecked by whatever CPUs come out in 2-3 years.

 

[FLEXOBENDER]

Doesn't need AIO, doesn't need fancy memory, doesn't need 800 watts.
Intel is in deep shit here.

 

[Jism]

Bit of expected, that the gains in some applications are not worth it to completely disable a CCD. It's like running a 2700X with a halved CCD / only 4 cores and 8 threads rather then the 8 / 16.

I'm sure a few percent can be gained here and there by deep diving into OC'ing and in particular memory speeds and timing.

 

[nikoya]

An other month to wait then
hope AMD will consider the release of x3D before the non 3D versions for future generations.

feels strange to pay the high price menu and beeing served last. right. AMD is playing cache cache (hide and seek) haha.

also I guess many people would have jumped for the x3D instead of waiting 5 months the 7600/7700. that would have translated by globally more benefits for AMD.

Im waiting the 7800x3d vs 7700 charts as you did for the 5800x3d vs non 3d. if possible with mins. in my mind this is were the extra cache shines.

anyway, excellent article! really exciting times for CPU hunters.

 

[apyrexia]

i been reading through all the review and i am a little confused about one thing.
comparing the stock results with the results of only the 3d cache ccd - it doesnt seem to make any significant difference in my eyes.
my questions are
1. Do you agree with my statement or i might not seeing this right?
2. IF im actually right about Stock and only 1ccd performance quite the same - what conclusion can we make out of this?
does that mean we can say AMD have done really good job with their software/drivers making STOCK perform in gaming just as good as disabling 1ccd out of the box?
hope anyone can clarify this for me, hopefully w1zzard

 

[Aranarth]

This test is very flawed. The 7800x3D is 700mhz slower than the 7950x3D so just disabling half the cores is not even close to an accurate comparison. AMD is doing that on purpose to keep the price to performance correct in their x3D lineup. It's the same reason they disable overclocking on them too.

YOU DID NOT READ THE ENTIRE ARTICLE.

This is covered in the article, before he even starts the benches!

 

[sLowEnd]

The power consumption figures are excellent.

 

[trsttte]

Interesting to see a CPU limit in many of those 4K results. There is no way CPUs will be able to keep up with GPUs. A 5090 will likely be severly bottlenecked by whatever CPUs come out in 2-3 years.

All the more reason for them to focus on efficiency instead of raising power levels to the moon. For gaming we're at a performance level where there's little benefit going further until games start getting more demanding, for professional work you'll want the stability and efficiency of lower power targets (or offload to a server that's either in a different class entirely or also prioritises efficiency)

It's like running a 2700X with a halved CCD / only 4 cores and 8 threads rather then the 8 / 16.

Not really the same thing, the 2700x only had 1 ccd but divided into 2 ccx, I don't see any real reason where you'd want to disable a ccx. With dual ccd ryzen 9 x900/x950 I could the see the appeal to manage power/thermal budget but then why buy that in the first place!?

hope AMD will consider the release of x3D before the non 3D versions for future generations.

feels strange to pay the high price menu and beeing served last. right. AMD is playing cache cache (hide and seek) haha.

I think as the tech gets cheapper the not x3D versions will just disappear at least for higher end, maybe as soon as zen5 even. It's pretty much settled that it improves gaming a lot, for the diy market that's focused on that it's kind of a no brainer. Maybe it'll become like with Intel where you have the K versions first - X eventually to be replaced with X3D - and then regular cheaper versions locked - but still unlocked on AMD

This timing of launching later is a marketing move and the old game of catch up with whatever Intel may pull out of their sleeves - had raptor lake performed worse we probably wouldn't have this so soon and all 3 variants. I'd be pissed if I was an early adopter of zen4 but goes to show second mouse gets the cheese

 

[mrnagant]

Looking at these, I am actually pretty impressed by the 7700/X in games. Seems like a good chip. Going to be what, $120 cheaper than the 7800X3D?

 

[wolf]

Impressive power consumption and performance, but not enough to tempt me to upgrade from the 5800X3D yet. AM5 really shaping up to be a good socket though.

Classic move holding back the model the vast majority of people actually want too, and milking the market at the top end. Ahh business.

 

[dragontamer5788]

I guess I could use geomean for Average FPS

I'm not sure if that's 100% useful either, because Harmonic Mean could very well be argued as the proper FPS averaging methodology (representing the time it takes to render 1000-frames of each game, then averaging those times together, then 1/that value to represent the FPS average).

Ehhhh... writers choice? I think you're screwed no matter what method you choose to be your average.

 

[Rubinhood]

If someone can make good arguments for either or any other change I'm totally open to improving things

Thanks @W1zzard . I guess if you ever wanted to unify the Avg FPS and Relative Perf charts (with 2 labels for each entry, rather than 2 dedicated charts), you could simply derive one from the other like you wrote.
In my mind, it would only make sense for games like CSGO to have an outsized impact on the average FPS, if I *assumed* that readers prefer high-FPS twitch shooters to modern raytraced titles. While that's not impossible for some readers, I can't think of a reason to assume that generally.

 

[Godrilla]

Interesting to see a CPU limit in many of those 4K results. There is no way CPUs will be able to keep up with GPUs. A 5090 will likely be severly bottlenecked by whatever CPUs come out in 2-3 years.

Hopefully in 2 to 3 years resolutions higher than 4k become a reality. I have been saying this since last year eventually downscaling from a higher resolution to a lower resolution using techniques like dsr, dldsr, AMD'S Virtual super resolution and Nvidia's ai dlaa will become more popular especially when you have performance on the table to improve image quality.

AMD is the new Intel: the delay of 7800X3D (the only reasonable choice in the lineup) is a shameful marketing move by Lisa Su.

Live a Pavlov experiment gamers will be triggered a whole month and a half until the 7800X3D comes out. Are we triggered yet?

 

[R0H1T]

A 5090 will likely be severly bottlenecked by whatever CPUs come out in 2-3 years.

No, not unless you're counting that gimmicky frame gen in the FPS charts! CPU's have progressed at a much higher rate than GPU's in the last few years & that trend will continue for the next half a decade at least, although tbf they also stalled a lot in the decade from 2008-17 as Intel just sat on their backside.