AMD Ryzen 7 3700X, 3800X and Ryzen 9 3900X - Page 2 - Overclock.net - An Overclocking Community

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AMD Ryzen 7 3700X, 3800X and Ryzen 9 3900X

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post #11 of 733 (permalink) Old 05-27-2019, 03:45 AM
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Quote: Originally Posted by ibb27 View Post
I'll get R7 3700X with Asus ROG Crosshair VIII Impact. Can't wait to build new PC!
Effectively doubling cores and threads to my current config, thank you AMD!
That board will probably cost more than the chip. Yuck. Asus sells too many boards. If you are going to spend the money for Asus, at least get a TUF series board for the reliability and 5-year warranty.
Quote: Originally Posted by deepor View Post
I would assume it's the same hardware design, it's just the turbo clocks set up differently for the default BIOS settings. The 105W model will keep the clock higher when all cores are in use.
It will be interesting to see overclockability. Perhaps the 65W will limit the chip and is a way to get people to pay for the faster chip.

Either way, I couldn’t imagine not spending the extra $100 to go right to the 3900X... and for how long a desktop can last it is obviously the best choice for anyone building a new system.

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post #12 of 733 (permalink) Old 05-27-2019, 04:24 AM
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Quote: Originally Posted by Dreamliner View Post
That board will probably cost more than the chip. Yuck. Asus sells too many boards. If you are going to spend the money for Asus, at least get a TUF series board for the reliability and 5-year warranty.
It's fine for me MB to cost more than a CPU. I'll def upgrade the CPU, when 16 core version is ready. Previous TUF boards were nothing special, but I'll keep eye on the Asrock miniITX boards too.
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post #13 of 733 (permalink) Old 05-27-2019, 06:22 AM
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The difference in power between these CPUs is interesting...

Ryzen 9 3900X
7nm 12/24
3.8 / 4.6 GHz
105W
499 USD

Ryzen 7 3800X
7nm 8/16
3.9 / 4.5 GHz
105W
399 USD

Ryzen 7 3700X
7nm 8/16
3.6 / 4.4 GHz
65W
329 USD

Ryzen 5 3600X
7nm 6/12
3.8 / 4.4 GHz
95W
249 USD

Ryzen 5 3600
7nm 6/12
3.6 / 4.2 GHz
65W
199 USD

The 3600X has a higher TDP compared to the 3700X, with only 0.2 GHz higher base clock and the same 4.4 GHz boost clock, while having 2 cores less...
The 3600 has the same TDP as the 3700X, despite having 2 cores less, the same base clock and a lower boost clock...
The 3800 and 3900 have the same TDP, despite the 3900 have 4 additional cores (that's 50% more cores), with only 0.1 GHz lower base clock and a 0.1 GHz higher boost clock...

If this was a leak, I would call it fake lol...
But in all seriousness... We know that the 3900X uses two 6 core chiplets. These are definitely binned much higher compared to the 3600 and 3600X. I don't think the 3600 and 3600X are using two 3 core chiplets. Maybe they are also binning the I/O dies to lower power consumption on the more expensive parts, because I see no other way that the TDP could be like it is now.
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post #14 of 733 (permalink) Old 05-27-2019, 06:35 AM
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What are two other chiplets? HBM2?

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post #15 of 733 (permalink) Old 05-27-2019, 07:17 AM
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Quote: Originally Posted by Offler View Post
What are two other chiplets? HBM2?
The big chip is the IO die while the smaller chiplets are the the actual 8 core CPU dies.

How they are set up we will see. I will take a guess and say the R7 3700X is a single CPU die while the R7 3800X is two chiplets with 4 cores active each. But we'll see if it's just binning or a difference in the topology between the two. We still don't know exactly where the caches are located etc. Might be the 3800X has more cache than the 3700X. But a bigger cache size on the R9 3900X suggests it might be located on the CPU dies.
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post #16 of 733 (permalink) Old 05-27-2019, 07:39 AM
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The 3700X with 65W TDP looks good to me.

I want to try to keep the temps down and maybe even use a fanless MB like the Gigabyte X570 AORUS XTREME.
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post #17 of 733 (permalink) Old 05-27-2019, 08:08 AM
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Very interesting! I'll be keeping an eye on the reviews and benchmarks as they come, but this could very well be a platform for me to upgrade to from my Broadwell-E at 4.6 GHz.
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post #18 of 733 (permalink) Old 05-27-2019, 11:17 AM
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Hey! A cpu thread in the AMD forums. Where is the motherboard thread?


Hmm. 3700X or 3800X?

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post #19 of 733 (permalink) Old 05-27-2019, 11:21 AM
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Quote: Originally Posted by miklkit View Post
Hey! A cpu thread in the AMD forums. Where is the motherboard thread?


Hmm. 3700X or 3800X?
Stick with m y 2700x till 2020 and hope for 3700x/3800x prices come down a little.


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post #20 of 733 (permalink) Old 05-27-2019, 12:46 PM
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I'm just waiting for Shrimpy to pop the top on one.

That and the release of these - Will be looking at them closely.

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