The Ryzen platform is still very young. We are seeing improvements on a regular basis. As board partners and AMD iron out any existing bugs, the performance will only improve.

One of the most interesting discoveries about Ryzen was that RAM speed can have a significant impact on performance. For years with Intel’s various processors and platforms, RAM speed didn’t have much of an impact on compute performance. AMD’s new infinity fabric is directly effected by the speed of your RAM.

So I wanted to put this to the test. I was using a dual channel 32GB kit of Corsair Vengeance LPX 2400MHz RAM. I then ordered a 3000MHz kit. I wanted to control as many variables as I could. These RAM kits are practically identical aside from the speed and timings. Now let’s take a look at the test system.

For testing I used the system components featured in my latest Ryzen 7 build inside an S4 Mini case.

Test System Components

CPU AMD Ryzen 7 1700
MOTHERBOARD Biostar X370 Mini-ITX AM4
GPU Zotac GTX 1060 Mini
CPU Cooler Noctua NH-L9a
HDD Samsung 960 EVO 256GB
RAM 32GB Corsair Vengeance DDR4 2400MHz

Interestingly when I began testing, the Biostar X370GTN mini-itx motherboard would not run RAM over 2400MHz. I had to download and install the most recent BIOS update which added memory support up to 3200MHz.

The BIOS update was only released a few days ago. I noticed it also added voltage stability when overclocking as well. If you are building a system with this board make sure you grab the new updated BIOS.

RAM Testing Methodology

ryzen ram test corsair vengeance lpx kits

For testing, I put the system through my typical synthetic and gaming benchmarks. I tested everything at stock settings first, then ran all tests with the Ryzen 7 1700 overclocked to 3.625GHz at 1.275v. All tests were run with the newest BIOS for my motherboard installed.

The charts will be broken down into three sections. First you will find synthetic CPU benchmarks, then Synthetic gaming benchmarks, and lastly real world gaming benchmarks.

RAM Timing & Specs

Model Timing Tested Speed Voltage
PC4-19200 2x16GB 16-16-16-39 2400MHz 1.2V
PC4-24000 2x16GB 15-17-17-35 2932MHz 1.35V

Full RAM Speed Test Benchmark Video

If you prefer to watch rather then read, you can see the full benchmark video here. Or you can simply scroll down and browse through the benchmarks in written form.

Ryzen RAM Test: Synthetic CPU Benchmarks

ryzen ram test cpu benchmarks

Benchmarks – (3.25GHz Stock) 2400MHz 3000MHz +/-
Cinebench CPU 1403 1410 +0.5%
Geekbench (Single Core) 3914 4297 +9%
Geekbench (Multi Core) 20875 21643 +3.5%
Passmark CPU 14170 15050 +5.9%
CPU-Z (Single Core) 363 375 +3.2%
CPU-Z (Multi Core) 3952 3957 +0.2%
Benchmark – (3.625GHz OC) 2400MHz 3000MHz +/-
Cinebench CPU 1571 1585 +0.9%
Geekbench (Single Core) 4133 4325 +5%
Geekbench (Multi Core) 23044 24062 +4.3%
Passmark CPU 15575 16104 +3.3%
CPU-Z (Single Core) 412 415 +0.8%
CPU-Z (Multi Core) 4448 4430 -0.41%

In the CPU tests I saw performance increases across the board. At stock on average I saw increases of 3.71% at stock, and 2.32% when overclocked. While these are not massive improvements they are repeatable.

Ryzen RAM Test: Synthetic GPU Benchmarks

ryzen ram test gpu benchmarks

Benchmarks – (3.25GHz Stock) 2400MHz 3000MHz +/-
3D Mark Timespy 4272 4315 +1%
3D Mark Firestrike 11048 11157 +1%
Valley 3990 4172 +4.4%
Heaven 3070 3133 +2.1%
Benchmark – (3.625GHz OC) 2400MHz 3000MHz +/-
3D Mark Timespy 4339 4359 +0.5%
3D Mark Firestrike 11149 11347 +1.8%
Valley 4392 4605 +4.7%
Heaven 3089 3104 +0.5%

Other than the Valley benchmark, you will see much lower gains in these benchmarks. The GPU benchmarks don’t rely on the CPU’s performance as much. I saw an average of +1.63% with the Ryzen 1700 at stock speeds, and +1.88% when overclocked.

Ryzen RAM Test: Gaming Benchmarks

ryzen ram test gaming benchmarks2400MHz

Game Avg. fps Max Min
Metro Last Light 142 276 22
Tomb Raider 196 230 160
Batman Arkham Asylum 101 130 61

3000MHz

Game Avg. fps Max Min
Metro Last Light 150 282 27
Tomb Raider 198 230 160
Batman Arkham Asylum 103 135 52

You can expect to gain around 2-3fps in games. I would be interested to see what type of increase you could get from RAM clocked at 4000MHz. Metro Last light turned in interesting results, with +8 average fps.

Conclusion

In my testing I found that faster RAM speed does effect Ryzen CPU performance. My tests were definitive and repeatable. You should expect to see even more gains with faster RAM speeds.

3 COMMENTS

  1. Hi Jay, At first, very good post! I have a question for you: The reason why Corsair Memories (PC4-24000 2x16GB – CMK32GX4M2B3000C15) do not reach the 3000MHz and only run at 2993MHz with Ryzen processors is due to: “The AMD Ryzen™ processor does not offer memory dividers for DDR4-3000 or DDR4-3400. Users shooting for higher memory clocks should aim for 3200 or 3500 MT/s.” source: https://community.amd.com/community/gaming/blog/2017/03/14/tips-for-building-a-better-amd-ryzen-system Do you think this will be resolved in the future with a bios update? Thanks for your time, regards from Argentina!

    • I made a mistake, I meant “… and only run at 2933MHz (not 2993) with Ryzen processors …” regards!

    • Hey Adrian, I don’t think AMD is going to change their RAM frequencies in the future. Now that most Ryzen motherboards can hit 3200MHz I don’t tihnk it matters too much.

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