How Low Can You Go? Memory Latency Competition - AIDA64

[heky]

One possible explanation for the lackluster performance… your north bridge clock seems a little low... AFAIK you should be able to push that well over 4500MHz with decent cooling.

Also, how much and what model memory are you running?




So I just made a number of changes to both leaderboards... I hope I didn't screw this up. We want concise information here so please take a moment to review them again and let me know if there are any remaining issues.

In the Points Classification my entry shows i have 2x8gb g.skill memory. I have 4x8gb Patriot Viper Steel.

 

[theonek]

One possible explanation for the lackluster performance… your north bridge clock seems a little low... AFAIK you should be able to push that well over 4500MHz with decent cooling.

Also, how much and what model memory are you running?




So I just made a number of changes to both leaderboards... I hope I didn't screw this up. We want concise information here so please take a moment to review them again and let me know if there are any remaining issues.

really don't know how to adjust it's clock, will have to go through bios more thorough, may it be possible the AIDa doesn't mark this northbridge clock right? and the memory is corsair dominator 3000 2x16gb Hynix dies.

 

[DR4G00N]

really don't know how to adjust it's clock, will have to go through bios more thorough, may it be possible the AIDa doesn't mark this northbridge clock right? and the memory is corsair dominator 3000 2x16gb Hynix dies.

It's called CPU Cache Ratio in the bios, not sure how it'll do with 16GB sticks but 4.5GHz Cache should be doable.

 

[agent_x007]

Red Lantern : No underclocking needed

 

[Bones]

I may have something for this one and will have to check and see.....

 

[DR4G00N]

Time for a proper sub.
I'll pass on any prizes if I hold 1st till the end since only a few boards and mem kit's will run these kinds of settings.
But I think 4800 C14 may have the edge for latency though if anyone has some great A2 B-Die around.

CPU.......................... Intel i3 7350K @ 5.08GHz 1.375V
COOLING................ Custom water
MEMORY................. 16GB 2X8GB G.Skill Trident Z F4-4133C19D-16GTZA @ 4200 12-11-11-28 1T, 2.016V. Good ol' fashioned B-Die A0.
MOTHERBOARD….. ASRock Z170M OC Formula

 

[storm-chaser]

Here is my new build to get a baseline run in, haven't done much in the way of memory tuning yet...

CPU...….........………..Intel X6 i5 9600KF @ 5.3GHz
Cooling…………...…..MSI Core Frozr XL 120mm air
MEMORY......………..16GB G.Skill Trident Z (non RGB) @ 4000MHz
MOTHERBOARD.....MSI MEG Z390 ACE

EDIT: I will update the leaderboards tonight, sorry for the delay, as I was building this rig and it took most of my time.

 

[TWK_OCZ]

DDR4 @ 4100 MHz

 

[storm-chaser]

I5 9600K, 5.2GHz @ 1.30 volts. Memory overclocked slightly to 4200MHz...
NB bump from 4800 to 4900...

CPU...….........………..Intel X6 i5 9600KF @ 5.2GHz
Cooling…………...…..MSI Core Frozr XL 120mm air
MEMORY......………..16GB G.Skill Trident Z (non RGB) @ 4200MHz
MOTHERBOARD.....MSI MEG Z390 ACE

 

[phanbuey]

I5 9600K, 5.2GHz @ 1.30 volts. Memory overclocked slightly to 4200MHz...
NB bump from 4800 to 4900...

CPU...….........………..Intel X6 i5 9600KF @ 5.2GHz
Cooling…………...…..MSI Core Frozr XL 120mm air
MEMORY......………..16GB G.Skill Trident Z (non RGB) @ 4200MHz
MOTHERBOARD.....MSI MEG Z390 ACE

View attachment 145694

Nice job !

Did you try cl17 @ 4000? You might get better latency around that range.

 

[storm-chaser]

Nice job !

Did you try cl17 @ 4000? You might get better latency around that range.

Yes, there is still some performance left on the table that I need to capitalize on.

Working on updating the Red Lantern Leaderboard, and when I'm done with that and it's posted I'm going to see about tightening up my memory timings...

Update #1
-Still running at 4000MHz G.Skill Trident Z @ 1.42volts
-CL reduced to 16 for clocks:
16-16-16-34

 

[phanbuey]

Yes, there is still some performance left on the table that I need to capitalize on.

Working on updating the Red Lantern Leaderboard, and when I'm done with that and it's posted I'm going to see about tightening up my memory timings...

Update #1
-Still running at 4000MHz G.Skill Trident Z @ 1.42volts
-CL reduced to 16 for clocks:
16-16-16-34

View attachment 145696

What's your trfc at? you should be way below 40ns with those kind of timings.
EDIT: just saw 700! make it 400... you will see a huge difference.

 

[storm-chaser]

What's your trfc at? you should be way below 40ns with those kind of timings.
EDIT: just saw 700! make it 400... you will see a huge difference.

Latest result with that set at 400...

Update:

Update:

 

[fly1ngh1gh]

4200 12-11-11-28 1T, 2.016V

Great result! Tell me, how did you cool your memory at this voltage? I got my result on a voltage of 1.6 v without any cooling. So I'm not ready to go any further)

Good ol' fashioned B-Die A0

I myself have several sets of memory on the A0 revision. They are really very good)

Latest result with that set at 400...

You can throw off all your ASRock Timing Configuration timings in your personal messages and I will try to help you with the timing settings.

 

[datoek]

My i3-9100F

Galax Gamer II Plus 3000MHz CL16 running @2400 CL14 (2x8GB) Dual Channel

 

[agent_x007]

@storm-chaser My Pentium 4 1,5GHz does NOT use DDR memory.
It's Socket 423 with Rambus or RDRAM.
It's frequency is also at 800MHz effective (not 400MHz)

 

[DR4G00N]

Great result! Tell me, how did you cool your memory at this voltage? I got my result on a voltage of 1.6 v without any cooling. So I'm not ready to go any further)

I just have a small fan on them since they stay very cool. With your board you will likely not see any real benefit in pushing the voltage higher since it's a 4 dimm'er.

 

[R2DSF]

Hmmm, nobody hit 60ns latency on Zen. I wonder, because it possible hit 55ns and lower (of course without stability in long-term usage).

 

[storm-chaser]

I just have a small fan on them since they stay very cool. With your board you will likely not see any real benefit in pushing the voltage higher since it's a 4 dimm'er.

Hey you've got the magic touch when it comes to overclocking, no doubt about that. You should do a seminar on memory overclocking and memory tuning. We could all benefit from that.

Hmmm, nobody hit 60ns latency on Zen. I wonder, because it possible hit 55ns and lower (of course without stability in long-term usage).

Right? I guess I'm glad I went intel with my most recent build. In fact, the disparity is out of this world if you compare the top Intel machine to the top AMD Ryzen rig. What's the result? The Intel rig has less than HALF the memory latency than that of it's AMD counterpart. This is a deal breaker for me, as I focus most of my builds on system responsiveness. Also, judging from our leader boards, it appears AMD has difficulty with memory speeds above 3733MHz? I have not confirmed this so take with a grain of salt, however, in general terms it appears AMD is no where close to touching Intel when it comes to peak memory clocks.. That's now two strikes against Ryzen, in my book. Just a few observations from our leaderboard...

 

[Deleted member 178884]

it appears AMD has difficulty with memory speeds above 3733MHz

Are you sure about that? : P
Well, here's a friends TRX40 run (see attachment)
The issue with ryzen is that it's memory sub system is generally a complete mess - hence poor latency, not to mention it has an IO die too and it's not monolithic, Either way AMD did a relatively good job handling the memory though. I might edit this post later with a few X570 runs at >3733 (daily only not benching) as there are a good few people running above that - the only reason why people don't is because it will drop the 1:1 on the infinity fabric and it begins to loose ram scaling.

 

[storm-chaser]

Are you sure about that? : P
Well, here's a friends TRX40 run (see attachment)
The issue with ryzen is that it's memory sub system is generally a complete mess - hence poor latency, not to mention it has an IO die too and it's not monolithic, Either way AMD did a relatively good job handling the memory though. I might edit this post later with a few X570 runs at >3733 (daily only not benching) as there are a good few people running above that - the only reason why people don't is because it will drop the 1:1 on the infinity fabric and it begins to loose ram scaling.

Thanks for clearing that up.

Yeah, I was just basing that conclusion from looking at the leaderboard, because if you look at clock speed, the best performing AMD rig in the competition put out a mediocre 3733MHz on memory frequency. That limitation by the infinity fabric sucks. In a perfect world you should be able to build an architecture that doesn't lose performance when you increase memory frequency.

 

[fly1ngh1gh]

CPU - i7 8086k 5.4Ghz, Cash 5.3Ghz
Cooler - Cryorig R1 Universal
Motherboard - ASRock z370 Taichi
Memory - Corsair Vengeance LpX Red Version BoX AiR (CMK16GX4M2B4266C19R) @ 4600Mhz CL 19-19-19-40

 

[R2DSF]

In fact, the disparity is out of this world if you compare the top Intel machine to the top AMD Ryzen rig. What's the result?

Depends. If you compare memory effifacy, then intel rocks, because of more complex memory controller (AMD Ryzens memory controller based on previous gen FX MC).
But if you compare overall computing power or computings per dollar, then amd rocks.

Also, judging from our leader boards, it appears AMD has difficulty with memory speeds above 3733MHz?

Yes it is, especially on Zen 1 and Zen 1+ CPUs, because with memory bus overclocking you also overclock inter-CPU bus (Infinity fabric), on Zen 2 it has user-configurable clock dividers, and memory bus and infinity fabric may operate asynchronously, so you can overclock memory up to 6000+ MHz but IF clock maximum is 1900 (1933MHz for golden samples).
For example this is local (at our forum i guess) record, performed by Devil Driver from Russian overclockers community on Dual-rank Micron E-die RAM:

 

[storm-chaser]

AMD Ryzens memory controller based on previous gen FX MC)

What? AMD is using more or less the same memory controller they had on the FX chips? O. M. G.

That explains a lot....

 

[R2DSF]

What? AMD is using more or less the same memory controller they had on the FX chips? O. M. G.

That explains a lot....

Memory controller (added write-back cache instead of write-full, and added signal processing units for ddr4 memory) and FPU (added uOP cache, added more advanced TLB and branch prediction, remove fma4 and xop math units).