Review AMD Ryzen 7 3800X Review: Core i7 Has a New Challenger

[TJ Hooker]

Hi, I see this table which says that if you use 4 pcs. of single rank memory modules they can work only at 2933 MHz (or less) , but is it possible to make 4 pcs. single rank 3200 MHz memory modules work at full speed? Is it necessary to up some voltage or is it not possible at all?

Yes it's possible (although not guaranteed), it's just technically an overclock at that point. No different than people running >3200 MHz RAM even though 3200 MHz is the max official speed.

like anything else, if you have a strong enough board that can provide the power and cooling, then you might be able to oc the sticks like anything else.

but i suspect this won't happen on a budget bottom of the barrel board. it's a matter of not being designed to handle the faster speeds since it was not designed to. but you'll need to do some research since this is all so new. i'd wait for some folks to try it out first and see what happens before spending the money.

It has more to do with the memory controller in the CPU than anything on the motherboard (or the cooling).

 

[Pebls2]

But, like most humans, if you do things other than gaming, the Ryzen 7 3800X offers a better mixture of performance in single- and multi-threaded applications. The

This kind of arguments crack me up....
Let me just preface this by saying that there should be no doubt to anyone that the ryzen cpus are extremely competitively priced right now.. BUT
The idea that the average user ("most humans" in this case) is at all likely to leverage the multi threaded advantage a ryzen 2 cpu possesses over intel's current offering is just completely laughable.

 

[realneil]

I just decided on the Ryzen-7 3800X CPU installed on the Gigabyte X570 Aorus Ultra mainboard. AMD is finally delivering in a way that's pressuring Intel and I like it.

My choice of RAM could be one of two kits that I already have here. One is a 32GB kit of GEIL Super Luce 4133MHz. (4-8GB sticks)
The other is a 32GB kit of GSKILL Ripjaws 3600MHz. (2-16GB sticks)

I'm buying this to help support AMD's efforts and it will be the third PC setup here at the house. I keep three systems going here so that when my kids and grandkids visit, we can play LAN games together.
The other two systems are Intel branded. (an 8700K and a 9700K) I don't care which one is the fastest because they'll all be good for my family's gaming needs.

 

[Phaaze88]

I just decided on the Ryzen-7 3800X CPU installed on the Gigabyte X570 Aorus Ultra mainboard. AMD is finally delivering in a way that's pressuring Intel and I like it.

My choice of RAM could be one of two kits that I already have here. One is a 32GB kit of GEIL Super Luce 4133MHz. (4-8GB sticks)
The other is a 32GB kit of GSKILL Ripjaws 3600MHz. (2-16GB sticks)

I'm buying this to help support AMD's efforts and it will be the third PC setup here at the house. I keep three systems going here so that when my kids and grandkids visit, we can play LAN games together.
The other two systems are Intel branded. (an 8700K and a 9700K) I don't care which one is the fastest because they'll all be good for my family's gaming needs.

Go with the 3600mhz kit. 4133 will actually be worse:

AMD Zen 2 Memory Performance Scaling with Ryzen 9 3900X

We take a close look at memory scaling on AMD's new Zen 2 Ryzen 3900X, testing both application and gaming performance at seven different memory speed and timing combinations ranging from 2400 MHz all the way up to 4000 MHz.

www.techpowerup.com

 

[Cherry2blost]

I was a little confused when reading the review on 3800X here..... I purposely bought the 3800X with the express intention of not 'having' to manual OC to get the performance I required, so updated my Aorus X470 Ultra Gaming to BIOS F41 (AB) and slipped the 3800X into place. Fired up machine, set XMP on 4 x 8GB GSKILL F4-3600C18D-TZRX RAM and entered windows 10 1903. Perfectly fine no issues at all. HWINFO was showing in excess of 1.5v as was CPUID and temps on CM 360mm AIO were high 70's touching 80C load and 60 idle.

The temps and volts were concerning to me so, I tried dropping volts (BSOD)... PBO (no change), auto OC (lower all core clocks 4275).... installed BIOS F42d (ABBA) and max boost finally touched 4500 fleetingly, but CB R20 all core freq was between 4150 and 4250 with CB scores in the 4600 range. All this time the CPU was hitting mid to high 80'sC and the fans on radiator were LOUD.

So maybe I got a duff chip?

Went to Ryzen Master again, dialled in 4300 All core @ 1.35 v ran again, temps still high (low 80's) but CB now at 4850 ish... improvement I thought?

played around for a couple of hours with voltages and finally settled on this...

Giving CB R20 score as follow... however I did make another small change. I went to RAM settings in BIOS and set as follows 16-18-18-18-38 @ 1.4v

Yielding a 5117 CB R20 score and 511 SC at the following levels in RM at 90% of the way through the run...

Userbenchmark gave good results, too...

So to conclude I have an 8 core 16 Thread CPU @ stable 4.3 all core at a sustained 1.308V (Full load) with temps under full load at around 65C (22 ambient) and 35C Idle (at 22C ambient) ,that performs actually better than I expected. So yes maybe and only maybe, the 3800X is the better chip overall, due to binning and performance envelopes. As long as you are willing to take a (small) hit on potential single core boost speeds. At these voltages, temps and performance levels, i am more than happy to just let it run for the next 2 years like this, until Ryzen 5000 launches, and to enjoy how uncomplicated the 3rd Gen Ryzen is, as compared to my old R7 1700 @3.8 (RAM 3333 CL16) (which was the best I could ever get stable)

Hope it helps, Cherry.

 

[seansplayin]

Why choose the 3800x?
I just built C8H with 3800x using 32GB of Gskill 4266 DDR4 @3600 with timings from Ryzen Dram Calculator (fast profile)
I have a 5c cooling loop for CPU & Video Card. Using ASUS bios 1001 (AGEST 1003ABBA) with PBO + 200mhz boost clock and performance enhancer 3 (OC) my single thread load peak clock rate is at 4700mhz and with all core loads its at 4350mhz. Cinebench R15 scores 2317 and 232 on single core with background apps Hwinfo64, msi afterburner, steam, discord and other running. Unfortunately with the new ASUS bios 1105 (AGESA 1004) my single core has taken a 1%+ hit and now doesn’t boost over 4650 when running Cinebench R15 and R20, Multicore also took a small hit. I Don’t own a 9900k but I did some googling and I saw several results showing @5ghz it scores 217 single core and 2166 all core. I can’t remember my Cinebench R20 scores off the top of my head.

 

[zx128k]

https://www.3dmark.com/spy/9310136 - 11628 cpu score, PBO and scalar at x10 1.0.0.3 ABBA. Room temp does affect the score. Normal is about 11550 cpu score with the RAM (3800) and IF overclocked correctly (1900). With PBO and scalar at x10. If the day is very cold then you will get 11500 without pbo +scalar x10.

https://www.3dmark.com/spy/9310157

The issue here is there is some OC RAM side going on the 9900k @ 5GHz. That cpu stock RAM speed cant get over 11k cpu score. Stock RAM is 2667 for the 9900k. A stock 9900KS @ 5GHz is about 10764 with stock RAM. This is the same as a 3800x with IF1800 and 3600 RAM CL16. So whant you fined in reviews is the 9900k gets that special RAM speed to boost it above everyone else. The 9900k is only faster if you get that extreme overclock on RAM and cores. Most 9900k's hit on average 11k cpu score and most 9900ks's hit on average 11700 cpu score.

Source: https://www.3dmark.com/newsearch#advanced?test=spy P&cpuId=2402&gpuId=&gpuCount=0&deviceType=ALL&memoryChannels=0&country=&scoreType=physicsScore&hofMode=false&showInvalidResults=false

https://www.3dmark.com/newsearch#advanced?test=spy P&cpuId=2544&gpuId=&gpuCount=0&deviceType=ALL&memoryChannels=0&country=&scoreType=physicsScore&hofMode=false&showInvalidResults=false

So an overclocked 3800x with 3800 RAM speed tightened RAM timings CL15 and IF 1900 hitting 11500. PBO + scalar x10.

The 9900k/ks only pulls ahead when you tighten the RAM and increase the RAM frequency. This is where the silicon lottery hits the 9900k more than the 3800x. RAM overclocking on the 3800x is more reliable. Never heard a 3800x not hit IF1800 and 3600 RAM CL14. Sometimes you can't go over 3600 on the 9900k even if you get 5.3GHz all cores.

Once you get that RAM speed matters more in 3d mark, you understand why it is better on the 9900k. In games my 3800x is not behind the 9900k at 5GHz all cores. I boost to 4449 all cores, along with the IF 1900 and RAM 3800 CL15 I am gpu bound on an OC'ed RTX 2080.

Also if you want to talk security you have to disable HT on the 9900k/ks and fully patch you system/bios. That more or less kills the 9900k/ks performance wise. Like an overclocked 9700k, about 8000-9000 cpu score.

An 3800x would be with IF1800 and 3800 RAM CL16 10700 on this graph. The same as the 9900ks stock. Tighten to CL14 and watch the 3800x hit over 11.3K. With 3d mark your score can be increased massively by tightening very good RAM timings. I believe this is because of the heavy use of SSE instructions. More so than in games. You can tighten RAM timings on the 9900k as well and you will get better performance. With 9900k you spend more on better RAM and a better AIO cooler.

Note how in two different chants a cpu like the 9900k which is being patched to make it slower because of security issues gets over a 100 points more. Hell it's almost a 9900ks @ 5.2GHZ all cores. Yet the stock 9900ks all cores 5 GHz can't get above 10764 with stock RAM. The 9900k @ 5GHz gets 11755, that's one hell of a RAM overclock to beat AMD.