3700X arriving today - infinity fabric question

[JonFlower]

Hi all.

I'm due to receive an 3700X and MSI B450 Tomahawk Max motherboard today. Currently running an i7 7700k system (which I see still command a great resale price on ebay).

I've done some reading...

I'm planning to, hopefully, run the infinity fabric at 1900MHz, with my RAM in sync 1:1 i.e. 1900MHz / DDR 3800 with tight timings (Team Group / 8PACK 4133 kit, 4x 8GB sticks)

In terms of actual overclocking then I understand that the Ryzen chips are very different to intel and probably best left at the default settings? i.e. allowing the CPU turbo up on its own accord.

Does that sound realistic in terms of the infinity fabric speed? Is 1800MHz the official upper range?

 

[Panos]

Hi all.

I'm due to receive an 3700X and MSI B450 Tomahawk Max motherboard today. Currently running an i7 7700k system (which I see still command a great resale price on ebay).

I've done some reading...

I'm planning to, hopefully, run the infinity fabric at 1900MHz, with my RAM in sync 1:1 i.e. 1900MHz / DDR 3800 with tight timings (Team Group / 8PACK 4133 kit, 4x 8GB sticks)

In terms of actual overclocking then I understand that the Ryzen chips are very different to intel and probably best left at the default settings? i.e. allowing the CPU turbo up on its own accord.

Does that sound realistic in terms of the infinity fabric speed? Is 1800MHz the official upper range?

Use first the Thaiphoon burner program to extract the RAM data to import them to the DRAM Calculator to get speed, timings and power settings.
How much your IF will go, depends the CPU. 1800 is more or less guaranteed even with just XMP settings. 1900 depends various things.

1866 IF is the official "max" before you delve into overclocking. So 3733 ram speed.

 

[Dying_Snail]

Hi all.

I'm due to receive an 3700X and MSI B450 Tomahawk Max motherboard today. Currently running an i7 7700k system (which I see still command a great resale price on ebay).

I've done some reading...

I'm planning to, hopefully, run the infinity fabric at 1900MHz, with my RAM in sync 1:1 i.e. 1900MHz / DDR 3800 with tight timings (Team Group / 8PACK 4133 kit, 4x 8GB sticks)

In terms of actual overclocking then I understand that the Ryzen chips are very different to intel and probably best left at the default settings? i.e. allowing the CPU turbo up on its own accord.

Does that sound realistic in terms of the infinity fabric speed? Is 1800MHz the official upper range?

From what I've read the speed that infinity fabric will run at is dependent on your chip and not many will run at 1900mhz most will do 1800mhz but your get some that won't run at that its the good old silicone lottery.

Not sure what the official upper limit is but I would guess its the same as the official memory speed 3200mhz/1600mhz because of the 1:1, I got lucky with my 3600x and it runs 1900mhz 1:1 fine had no problem hope your 3700x does too.

I've got the same motherboard a you too, I'm on bios v35 as seen reports that the latest one as some issues with changing settings where it can be unresponsive when trying to change some settings like fan curves and the like.

 

[JonFlower]

Thanks for the replies. Yes, I've got the DRAM calculator (great utility) and the Typhoon Burner for RAM info

Cheers about the BIOS version

 

[Dying_Snail]

Thanks for the replies. Yes, I've got the DRAM calculator (great utility) and the Typhoon Burner for RAM info

Cheers about the BIOS version

I had no luck with the dram calculator so I just let my motherboard take care of it my memory runs at 3800mhz c18 which I'll take for now mite give the dram calculator another go one day, I just wanted my pc up and run as not had one for about 11 years and it so good to be back in the pc game again.

You welcome about the bios I'm never one to update the bios straight away I like to see if there's any problems first then decide.

With v36 I thought better of it as I have a custom fan curve set up and my pc is working fine as is and I don't think there's any performance to be had with the v36 bios.

 

[JonFlower]

I love my new machine. The light show from the NZXT H710i is great.

I have the Infinity Fabric at 1800MHz / 3600MHz stable, anything above that seems to cause problems. RAM in 1:1. Tweaked the RAM down to CAS16 timings at 3600 speed. I'm reasonably happy with that outcome

 

[FireTwo]

max mine would do was 1866, was fine and stable on auto settings

1900 wouldn't even post no matter what volts I added.

tbh 1800/3600 vs 1866/1733 wasnt much in it maybe 1or2ns and 1GB/s on maxxmem

 

[Dying_Snail]

max mine would do was 1866, was fine and stable on auto settings

1900 wouldn't even post no matter what volts I added.

tbh 1800/3600 vs 1866/1733 wasnt much in it maybe 1or2ns and 1GB/s on maxxmem

I'd of been the same when I get time I mite play more with the settings see if I can get better then c18 not that I need to add I'm happy with how my pc is right now.

Glad you didn't get a dud that won't do 1800, I think the c16 will make up for not doing 1900/1866 so you not missing much if anything not that I'm a expert or anything just from what I've read online.

Now time too sit back enjoy your new baby.

 

[subbytna]

Thanks for the replies. Yes, I've got the DRAM calculator (great utility) and the Typhoon Burner for RAM info

Cheers about the BIOS version

What's the link for the DRAM calc and whats' it for? Got some time to kill today and fnacy a look if it's worth while

 

[Illuminist]

Mine does 1900mhz and 3800 but only if i ease it through other timings first, and even then it had to have the exact right settings in the LLC and soc voltage otherwise it won't boot and I have to start from scratch.

My advice is get it stable at as fast as you can and leave it alone.
Advice I don't take lol
I had mine at 4.6ghz one ccx and 4.1 all others with 3800 1900 and fiddled with it, now it won't go back to that no matter what I try

 

[Nutella33]

What's the link for the DRAM calc and whats' it for? Got some time to kill today and fnacy a look if it's worth while

https://www.overclock.net/forum/13-...locking-dram-am4-membench-0-8-dram-bench.html

Its not plug and play but gives you a good idea what you can try and aim for with ram timings. Really is worth looking at the recommendations link Usmus has in that post as well, as it helps fault find when things arent working

now it won't go back to that no matter what I try

Have you tried 3733/1866? Think that's the highest officially supported for 1:1?

 

[opethdisciple]

Mine does 1900mhz and 3800 but only if i ease it through other timings first, and even then it had to have the exact right settings in the LLC and soc voltage otherwise it won't boot and I have to start from scratch.

My advice is get it stable at as fast as you can and leave it alone.
Advice I don't take lol
I had mine at 4.6ghz one ccx and 4.1 all others with 3800 1900 and fiddled with it, now it won't go back to that no matter what I try

The issue is once you start tinkering you cant stop.

 

[Panos]

Mine does 1900mhz and 3800 but only if i ease it through other timings first, and even then it had to have the exact right settings in the LLC and soc voltage otherwise it won't boot and I have to start from scratch.

My advice is get it stable at as fast as you can and leave it alone.
Advice I don't take lol
I had mine at 4.6ghz one ccx and 4.1 all others with 3800 1900 and fiddled with it, now it won't go back to that no matter what I try

Some Ryzen 3000, if go over 1866 Infinity Fabric they clock down losing 100-200Mhz from CPU clock. So there is silicon lottery draw in this aspect.
If you can go 3733C14 with tight timings, having the strongest cores clocking to 4650Mhz on light loads is pretty solid and up with the top 1% CPU/RAM combo performance before we go to exotic cooling and overclocking. (with the IPC difference between Intel & Zen 2 is the equivelent of bit over 5Ghz in gaming).

My 3900X cannot do over 1900 IF, while my brother's 3800X eats 1933 IF for breakfast. If it was scaling 1:1 to 2000 it would probably have done it.

 

[subbytna]

Ok ta

 

[bongo78]

Forget about that phony calculator, educate yourself a bit on the DDR4 and do a full manual oc. You will be much surprised on the outcome. Wasted so much time going the "easy way". Finally gave up and rtfm . I know it might all sound like poo from the start, but give it a bit of thought and it will clear.

 

[FireTwo]

Forget about that phony calculator, educate yourself a bit on the DDR4 and do a full manual oc. You will be much surprised on the outcome. Wasted so much time going the "easy way". Finally gave up and rtfm . I know it might all sound like poo from the start, but give it a bit of thought and it will clear.

thanks for the link will deffo check it out!
calculator seems ok thou can help a lot of people out I like the memtests ect

 

[opethdisciple]

My 3700x only does 1800MHz FCLK.

How high your CPU can run the FCLK determines how fast you run your ram.

Your be between 1800MHz - 1900MHz FCLK.

 

[bongo78]

Its the simplest and straightforward piece on the DDR4 that I have found so far.

 

[willhub]

I tried using the DRAM calculator and overclocking on my B350F, nothing would work.

 

[Panos]

I tried using the DRAM calculator and overclocking on my B350F, nothing would work.

Did you used the Thaiphoon Burner first to export your RAM stats and load them in DRAM Calc?
Can you show us your DRAM Calc page?