buying a new computer

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Uri Blass
Posts: 8587
Joined: Wed Mar 08, 2006 11:37 pm
Location: Tel-Aviv Israel

Re: buying a new computer

Post by Uri Blass » Thu Sep 26, 2019 11:36 am

I still did not buy a new computer.

Today I went to a shop and they told me that they can sell me only
AMD Ryzen 9 3700X and not AMD Ryzen 9 3900X so I wonder what is the speed difference between them.

How much faster is CPU: AMD Ryzen 9 3900X 12 Core relative to 3700?

Zenmastur
Posts: 487
Joined: Sat May 31, 2014 6:28 am

Re: buying a new computer

Post by Zenmastur » Thu Sep 26, 2019 5:32 pm

Uri Blass wrote:
Thu Sep 26, 2019 11:36 am
I still did not buy a new computer.

Today I went to a shop and they told me that they can sell me only
AMD Ryzen 9 3700X and not AMD Ryzen 9 3900X so I wonder what is the speed difference between them.

How much faster is CPU: AMD Ryzen 9 3900X 12 Core relative to 3700?
The 3900X have been hard to find. I put myself on notification list on several sites. I have received several notification that they are back in stock, but by the time I actually read the message and go to the site they were out of stock again. I got a notification yesterday that Newegg had them back in stock. But I had a medical procedure done in which I was put under so I was groggy most of the day and I didn't see the notification until this morning. By that time they were out of stock again.


I have seen only one chess benchmark on the 3700X. IIRC it was around 23.5M nps. But they didn't give much data as to what the configuration was or the condition under which the test was run so I didn't pay it much attention. It seemed a little slower than I expected. 27-29M nps seems likely on a well optimized 3700x system. Compare this to a 3900X at 40-44M nps. 40M nps at 3.8 ghz base clock on all cores and around 44M nps at 4.2Ghz all core.

If I were forced to buy/build a system now, I think I would get a Ryzen 5 3600 and then when the 3900X or 3950X's becomes available I would simply swap it for the 3600. But, that's just me. Many people would be hesitant to do such things.

Regards,

Zenmastur
Only 2 defining forces have ever offered to die for you.....Jesus Christ and the American Soldier. One died for your soul, the other for your freedom.

Uri Blass
Posts: 8587
Joined: Wed Mar 08, 2006 11:37 pm
Location: Tel-Aviv Israel

Re: buying a new computer

Post by Uri Blass » Fri Sep 27, 2019 9:33 pm

Zenmastur wrote:
Thu Sep 26, 2019 5:32 pm
Uri Blass wrote:
Thu Sep 26, 2019 11:36 am
I still did not buy a new computer.

Today I went to a shop and they told me that they can sell me only
AMD Ryzen 9 3700X and not AMD Ryzen 9 3900X so I wonder what is the speed difference between them.

How much faster is CPU: AMD Ryzen 9 3900X 12 Core relative to 3700?
The 3900X have been hard to find. I put myself on notification list on several sites. I have received several notification that they are back in stock, but by the time I actually read the message and go to the site they were out of stock again. I got a notification yesterday that Newegg had them back in stock. But I had a medical procedure done in which I was put under so I was groggy most of the day and I didn't see the notification until this morning. By that time they were out of stock again.


I have seen only one chess benchmark on the 3700X. IIRC it was around 23.5M nps. But they didn't give much data as to what the configuration was or the condition under which the test was run so I didn't pay it much attention. It seemed a little slower than I expected. 27-29M nps seems likely on a well optimized 3700x system. Compare this to a 3900X at 40-44M nps. 40M nps at 3.8 ghz base clock on all cores and around 44M nps at 4.2Ghz all core.

If I were forced to buy/build a system now, I think I would get a Ryzen 5 3600 and then when the 3900X or 3950X's becomes available I would simply swap it for the 3600. But, that's just me. Many people would be hesitant to do such things.

Regards,

Zenmastur
Do you suggest that the difference in speed between 3600 and 3700 is small but the difference in price is high so it is better to buy 3600 and not 3700?

mwyoung
Posts: 1641
Joined: Wed May 12, 2010 8:00 pm

Re: buying a new computer

Post by mwyoung » Fri Sep 27, 2019 10:53 pm

Uri Blass wrote:
Thu Sep 26, 2019 11:36 am
I still did not buy a new computer.

Today I went to a shop and they told me that they can sell me only
AMD Ryzen 9 3700X and not AMD Ryzen 9 3900X so I wonder what is the speed difference between them.

How much faster is CPU: AMD Ryzen 9 3900X 12 Core relative to 3700?
Hello Uri,
Unless you need a new system right now. It would be better to wait until the 3900x is more available.

Here are the stats.

CB r 20 score (Cinebench is a good benchmark. When looking at what CPU is best for running chess engines)

3900x 1 thread score 502.
3700x 1 thread score 482
3900x is 4.1% faster.

3900x multi thread score 7155
3700x multi thread score 4760
3900x is 50.3% faster.
Professing themselves to be wise, they became fools,
Take on me. foes 0

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Ovyron
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Re: buying a new computer

Post by Ovyron » Fri Sep 27, 2019 10:54 pm

jp wrote:
Sun Aug 25, 2019 8:59 am
The harder it is for Uri to decide and the longer he waits, the better his final decision will be
Unless he decides to not buy at all? Once a I had the money to buy a decent GPU for Leela I decided to buy a 40-inch TV instead.

And, man, it's hard to regret when it has much better blacks and rich colors than my old 32-inch TV. It's as if most of the improvements of the TV weren't related to its size (though, since then I haven't gone to a movie theater anymore, so perhaps this size is "big enough".)
Great spirits have always encountered violent opposition from mediocre minds.

MikeB
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Location: Pen Argyl, Pennsylvania

Re: buying a new computer

Post by MikeB » Sat Sep 28, 2019 1:12 am

Uri Blass wrote:
Fri Sep 27, 2019 9:33 pm
Zenmastur wrote:
Thu Sep 26, 2019 5:32 pm
Uri Blass wrote:
Thu Sep 26, 2019 11:36 am
I still did not buy a new computer.

Today I went to a shop and they told me that they can sell me only
AMD Ryzen 9 3700X and not AMD Ryzen 9 3900X so I wonder what is the speed difference between them.

How much faster is CPU: AMD Ryzen 9 3900X 12 Core relative to 3700?
The 3900X have been hard to find. I put myself on notification list on several sites. I have received several notification that they are back in stock, but by the time I actually read the message and go to the site they were out of stock again. I got a notification yesterday that Newegg had them back in stock. But I had a medical procedure done in which I was put under so I was groggy most of the day and I didn't see the notification until this morning. By that time they were out of stock again.


I have seen only one chess benchmark on the 3700X. IIRC it was around 23.5M nps. But they didn't give much data as to what the configuration was or the condition under which the test was run so I didn't pay it much attention. It seemed a little slower than I expected. 27-29M nps seems likely on a well optimized 3700x system. Compare this to a 3900X at 40-44M nps. 40M nps at 3.8 ghz base clock on all cores and around 44M nps at 4.2Ghz all core.

If I were forced to buy/build a system now, I think I would get a Ryzen 5 3600 and then when the 3900X or 3950X's becomes available I would simply swap it for the 3600. But, that's just me. Many people would be hesitant to do such things.

Regards,

Zenmastur
Do you suggest that the difference in speed between 3600 and 3700 is small but the difference in price is high so it is better to buy 3600 and not 3700?

3700 complete system for $1386

https://www.cpusolutions.com/store/pc/G ... 7p5340.htm

my guess is that with 8 cores it will see just under 30M SF bench nps , and with using hyperthreading with 15 threads , it may see about 40 M nps ( I can be off plus or minus 10% since each system is different) Based on recent Geekbench integer scores ( the best chess proxy for A/B engines)

https://browser.geekbench.com/v4/cpu/14714139

Edit - I have seen Ryzen 5 3600 complete systems for $1000 , 6 cores should do about about 22M mis in SF bench and with using 11 threads , should be around 27M nos. based on Geekbench integer scores as a proxy https://browser.geekbench.com/v4/cpu/14705376

2nd Edit - I have seen 3900x system with NVIDIA GeForce RTX 2060 SUPER - 8GB for $2215 , 40M nps bench with 12 cores and and perhaps just under 60 M nps with 23 threads https://browser.geekbench.com/v4/cpu/14714217

just noticed, the Ipman has some 3900X's on his website - looks like I may have over estimated nps by 20% on all of the above. Not really sure.

cma6
Posts: 138
Joined: Thu May 29, 2014 3:58 pm

Re: buying a new computer

Post by cma6 » Sat Sep 28, 2019 3:04 am

Would it not be much better to wait till 11-12/2019 and get a much more powerful Threadripper system?

MikeB
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Location: Pen Argyl, Pennsylvania

Re: buying a new computer

Post by MikeB » Sat Sep 28, 2019 3:23 am

cma6 wrote:
Sat Sep 28, 2019 3:04 am
Would it not be much better to wait till 11-12/2019 and get a much more powerful Threadripper system?
I'm waiting to see the pricing and throughput for next gen Threadripper. I'm hoping for a 64 core model - having cores is critical for testing.

ouachita
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Full name: Bobby Johnson

Re: buying a new computer

Post by ouachita » Sat Sep 28, 2019 1:06 pm

cma6 wrote:
Sat Sep 28, 2019 3:04 am
Would it not be much better to wait till 11-12/2019 and get a much more powerful Threadripper system?
No need to wait on new systems. The 2-year old 7980XE is still the fastest single CPU system. See Ipman.
SIM, PhD, MBA, PE

Joost Buijs
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Joined: Thu Jul 16, 2009 8:47 am
Location: Almere, The Netherlands

Re: buying a new computer

Post by Joost Buijs » Sat Sep 28, 2019 3:56 pm

ouachita wrote:
Sat Sep 28, 2019 1:06 pm
cma6 wrote:
Sat Sep 28, 2019 3:04 am
Would it not be much better to wait till 11-12/2019 and get a much more powerful Threadripper system?
No need to wait on new systems. The 2-year old 7980XE is still the fastest single CPU system. See Ipman.
The 9980XE is even faster because it can reach higher clocks. Maybe the 7980XE was decapped with a cooler directly onto the silicon, I don't know.
Pretty soon Intel will release the 10980XE for half the cost of the 7980XE, this processor will make the 3950X look pale in comparison.

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