@JamesJAB1 Nope! Disabling NUMA resulted in a memory mark reduction to 1650 (18% percentile) on the T7910. It must have something to do with ECC throttling therefore.
I am surprised, and disappointed, because according to PASSMARK, the world average memory mark is 2419 (160 min - 5061 max).
It seems that paying a premium, isn't always money well spent!
Could also have something to do with the bios version on each system. (The Specter and meltdown fixes slow down affected systems) Maybe the T7610 has an older bios from before the fixes.
The BIOS was updated a couple of weeks ago on both computers (to A33 on the T7910, and to A18 on the T7610), so it's not that either. Whatever the cause, it's highly unusual for DDR3 RAM to outperform DDR4!
P.S. Just had a look at the RAM sticks in the T7910.....they are all Hynix, running at 2133Mhz. This is a reputable brand, which makes the mystery even deeper.
It could also just be that the specter/meltdown fix has a bigger performance hit on the CPU in your T7910.
You might want to try downgrading the bios on both machines to versions from before the specter/meltdown fixes and see if that changes the performance numbers.
JamesJAB1
2 Intern
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217 Posts
0
December 6th, 2020 13:00
This could have something to do with NUMA (Non-Uniform Memory Access) being enabled in the Bios on one of the machines.
NUMA allows each CPU to access its own local memory faster.
Disabling NUMA Increases the latency of all the system memory to allow both CPUs to access all of the RAM at the same speed.
me.myself.i
2 Intern
•
135 Posts
0
December 7th, 2020 20:00
@JamesJAB1 Nope! Disabling NUMA resulted in a memory mark reduction to 1650 (18% percentile) on the T7910. It must have something to do with ECC throttling therefore.
I am surprised, and disappointed, because according to PASSMARK, the world average memory mark is 2419 (160 min - 5061 max).
It seems that paying a premium, isn't always money well spent!
JamesJAB1
2 Intern
•
217 Posts
0
December 7th, 2020 21:00
Could also have something to do with the bios version on each system. (The Specter and meltdown fixes slow down affected systems) Maybe the T7610 has an older bios from before the fixes.
me.myself.i
2 Intern
•
135 Posts
0
December 8th, 2020 16:00
The BIOS was updated a couple of weeks ago on both computers (to A33 on the T7910, and to A18 on the T7610), so it's not that either. Whatever the cause, it's highly unusual for DDR3 RAM to outperform DDR4!
P.S. Just had a look at the RAM sticks in the T7910.....they are all Hynix, running at 2133Mhz. This is a reputable brand, which makes the mystery even deeper.
JamesJAB1
2 Intern
•
217 Posts
0
December 8th, 2020 20:00
It could also just be that the specter/meltdown fix has a bigger performance hit on the CPU in your T7910.
You might want to try downgrading the bios on both machines to versions from before the specter/meltdown fixes and see if that changes the performance numbers.
me.myself.i
2 Intern
•
135 Posts
0
December 8th, 2020 21:00
Thanks for persevering with me @JamesJAB1. I will try the BIOS downgrade over the coming holidays. Cheers!