AMD memory speed issues

Here are the shots at 2133


As far as I know, Coram is correct and our MOBO does not support DDR4 memory.

MaxMEM at 2133 and 1866 for me:

Just look at the 3 readings:
My i7-Brix ddr3-798 ( 1596)
30,916, 20,688 21,426
then my AMD ddr3-1070( 2140)
14240, 12,015, 8092
so far the weaker memory kills the AMD with 2133 mem.
looking at yours
11,378, 11,294, 5680
ddr3-802(1604)
So the issue I guess is why less mem speed on AMD?
Roe5685

Coram Daes said:

I cant wait for Zen, Doverboy...

Sorry, just trying to help with another comparison with pretty similar specs...

Two conclusions. I should return the faster on paper Kingston. Score no better than the old slower memory ( GSkill ).

Also look at my i7 brix results for slower yet again memory on paper. it achieves twice the AMD score.

Now why is that? Is it a known fact AMD cpus do a lousy job on the memory?

OR do I have setting wrong? Can anyone on an AMD cpu fx-8350 or better get score up to 30,000 like the i7 brix?

Roe5685.

Archie123 said:

looking at your cpu/z screenie for that ram your northbridge is reporting 2207? remember its dual channel so the 1070.2 is x 2.

apologies if im getting the wrong end of the stick but your new kingston ram is running perfectly in that rig :)

remember the ram in your other rig is DDR4 regardless of frequencies DDR4 is much faster in benchmarks (not so much in real world applications)

Probably not because it's dual channel, but rather because it's DDR (double data rate, 2 transfers per clock tick.). Quad channel memory doesn't report 4X the clock frequency.

I believe that DDR4 and DDR3 have about the same performance at the same clocks. DDR4 uses a lower voltage, and is scalable to higher clock frequencies.

Just out of curiosity, I looked up:

PassMark Software - Memory Write Performance with AMD CPUs Benchmark Charts

PassMark Software - Memory Write Performance with Intel CPUs Benchmark Charts

I don't pretend to understand why, but these show much higher memory write speeds for Intel CPUs than for AMD. It's similar for uncached reads.

Weird. I haven't stayed current with AMD CPUs since my last system with one of their processors, in the Socket 939 days.

thanks for looking at passmark. It confirms the AMD lower than the test Intel.

But now why are the two AMD's the same even though one is higher speed than the other?