Memory CL17 vs CL14

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fvolk
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Memory CL17 vs CL14

Unread post by fvolk » Mon Aug 05, 2019 5:19 am

So I wanted to know how the memory speed differs from low-cost to high end memory for the H2.
Low cost: 2x4GB SK Hynix HMA851S6AFR6N - 2400 17-17-17-39
(This appears to be the Ram in MacBooks because a lot of upgraders are selling these used for cheap (I paid 15 EUR for 2x4=8GB)
High end: 2x16GB Kingston HyperX HX424S14IB/16 - 2400 14-14-14-35
ram.jpg
ram.jpg (127.81 KiB) Viewed 1241 times
skhynix.png
skhynix.png (62.59 KiB) Viewed 1241 times
hyperx.png
hyperx.png (72.48 KiB) Viewed 1241 times
After running memtest for 3h12 (8Gb) and 16h30 (32Gb), the results are:
Cheap ram: 7912 MB/s,
high-end: 8318 MB/s
---> ~5% throughput difference.
Whether you can feel this in practice with any applications, well, I don't know.... :-)
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odroid (Mon Aug 05, 2019 12:16 pm) • mad_ady (Tue Aug 06, 2019 1:49 pm) • Mullcom (Thu Aug 08, 2019 4:17 pm) • domih (Fri Aug 09, 2019 1:02 pm) • RomaT (Fri Aug 09, 2019 9:04 pm)

fvolk
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Re: Memory CL17 vs CL14

Unread post by fvolk » Thu Aug 08, 2019 1:57 am

For science, I was also able to st...borrow a set of 2x16GB 2666 HyperX (new price ~140 EUR)
Running memory test with it on the H2 it initially seems to be stable, however after several minutes of running some bit errors turn up.
This 2666 memory works fine in a "normal" PC, so it must be the H2.
Consequently, I would rather warn that 2666 ram may appear stable at first while it is not, however, maybe 2666 ram with slower timings is also longer stable on the H2?
Anyway, maybe @odroid wants to add these results to the Wiki page....
All measurements done with latest 1.05 BIOS and MemTest V8.0 Free
hynix2666.jpg
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Mullcom (Thu Aug 08, 2019 4:17 pm)

RomaT
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Re: Memory CL17 vs CL14

Unread post by RomaT » Thu Aug 08, 2019 7:45 pm

I bought a kit of two modules of 16GB, Kingston HyperX Impact [HX424S14IBK2/32]
I confirm - it works great !!!
.
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Last edited by RomaT on Sat Aug 10, 2019 3:30 am, edited 4 times in total.
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domih (Fri Aug 09, 2019 1:08 pm)

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Re: Memory CL17 vs CL14

Unread post by domih » Fri Aug 09, 2019 1:05 pm

fvolk wrote:
Mon Aug 05, 2019 5:19 am
So I wanted to know how the memory speed differs from low-cost to high end memory for the H2.
Low cost: 2x4GB SK Hynix HMA851S6AFR6N - 2400 17-17-17-39
(This appears to be the Ram in MacBooks because a lot of upgraders are selling these used for cheap (I paid 15 EUR for 2x4=8GB)
High end: 2x16GB Kingston HyperX HX424S14IB/16 - 2400 14-14-14-35

ram.jpg

skhynix.png
hyperx.png

After running memtest for 3h12 (8Gb) and 16h30 (32Gb), the results are:
Cheap ram: 7912 MB/s,
high-end: 8318 MB/s
---> ~5% throughput difference.
Whether you can feel this in practice with any applications, well, I don't know.... :-)
I'm interested. With the tests I'm doing with RDMA (see viewtopic.php?f=171&t=35614&start=50) +5% in memory throughput might have an effect.

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Re: Memory CL17 vs CL14

Unread post by domih » Fri Aug 09, 2019 1:09 pm

RomaT wrote:
Thu Aug 08, 2019 7:45 pm
Tomorrow I will have two modules of 16GB, Kingston HyperX Impact [HX424S14IBK2/32]
At the weekend I will unsubscribe what results.
I'm ordering too (for my 2nd H2 and also for testing RDMA).

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Re: Memory CL17 vs CL14

Unread post by Mullcom » Fri Aug 09, 2019 4:23 pm

Can you make me a guide how i can install this software and ware i came find it? I can test my to module to. Two 16

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Re: Memory CL17 vs CL14

Unread post by RomaT » Fri Aug 09, 2019 4:37 pm


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Re: Memory CL17 vs CL14

Unread post by Mullcom » Mon Aug 12, 2019 10:30 pm

How did you get this to boot with H2. I have try too boot USB drive but it's not working.

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RomaT
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Re: Memory CL17 vs CL14

Unread post by RomaT » Mon Aug 12, 2019 10:37 pm

Write the image to the flash drive, boot from it.
When loading from a flash drive for a long time, a black screen.
Just wait for the boot.

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Re: Memory CL17 vs CL14

Unread post by Mullcom » Mon Aug 12, 2019 10:47 pm

Get it to boot now. With test is moste important to do ? I do all. 3 times. I'll leave it there until it's done

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Last edited by Mullcom on Mon Aug 12, 2019 10:47 pm, edited 1 time in total.

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Re: Memory CL17 vs CL14

Unread post by Mullcom » Mon Aug 12, 2019 10:52 pm

Some imgImageImageImageImage

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RomaT
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Re: Memory CL17 vs CL14

Unread post by RomaT » Mon Aug 12, 2019 11:50 pm

only this is a topic about memory with timings CL14, not CL16 :)
general theme here viewtopic.php?p=265406#p265406
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