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by morphious66
Tue Jul 30, 2019 1:47 pm
Forum: General discussion
Topic: Fastest Micro SD card for Pi 4? Does it support XC U3?
Replies: 38
Views: 9994

Re: Fastest Micro SD card for Pi 4? Does it support XC U3?

ok, here are the results with the new Rpi4 with a 64gig Sandick A2 U3 V30 micro SD card RPi3 - overclocked to 100mghz Timing buffered disk reads: 96 MB in 3.03 seconds = 31.66 MB/sec 419430400 bytes (419 MB) copied, 69.3182 s, 6.1 MB/s RPi4 - 50mgzh stock clock Timing buffered disk reads: 128 MB in ...
by morphious66
Wed Jul 03, 2019 8:34 pm
Forum: General discussion
Topic: Fastest Micro SD card for Pi 4? Does it support XC U3?
Replies: 38
Views: 9994

Re: Fastest Micro SD card for Pi 4? Does it support XC U3?

Also looking into an ultra small Samsung MUF-128AB option https://www.samsung.com/us/computing/memory-storage/usb-flash-drives/usb-3-1-flash-drive-fit-plus-256gb-muf-256ab-am/ reviews do not mention of any heating issues and its ultra small as well. and may be small enough to hide of on the side wit...
by morphious66
Wed Jul 03, 2019 8:28 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 951
Views: 114439

Re: Raspberry Pi 4 Thread - general discussion

If you want compact and not a bulky SSD dangling off it, get the SanDisk Ultra fit USB3.0/3.1 versions.(Samsung do a similar style) They are a similar price to their uSD counterpart. Other than everything being blindingly hot so I can't get the thing out without having to turn it all off and leave ...
by morphious66
Wed Jul 03, 2019 3:00 pm
Forum: General discussion
Topic: Fastest Micro SD card for Pi 4? Does it support XC U3?
Replies: 38
Views: 9994

Re: Fastest Micro SD card for Pi 4? Does it support XC U3?

I'm going to order and try the 64gig Sandick A2 U3 V30 card from https://www.amazon.com/SanDisk-Extreme-microSD-UHS-I-Adapter/dp/B07FCMBLV6/ref=asc_df_B07FCMBLV6/?tag=hyprod-20&linkCode=df0&hvadid=309776868400&hvpos=1o1&hvnetw=g&hvrand=322435027667366763&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlo...
by morphious66
Wed Jul 03, 2019 2:55 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 951
Views: 114439

Re: Raspberry Pi 4 Thread - general discussion

I posted the results of the pidramble benchmarks some days ago (pidramble have been used in MagPi and link the RPi Blog many times iirc) It is seen at 50MHz and the 'overclock' does nothing. Tested with SanDisk A1 card so far It nothing earth shattering, if not mostly slower than an overclocked SD ...
by morphious66
Tue Jul 02, 2019 10:04 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 951
Views: 114439

Re: Raspberry Pi 4 Thread - general discussion

The performance is about what you'd expect from DDR50 clocking. Here's the output from dmesg: root@raspberrypi:~# dmesg | grep mmc0 [ 1.129772] mmc0: SDHCI controller on fe340000.emmc2 [fe340000.emmc2] using ADMA [ 1.234256] mmc0: new ultra high speed DDR50 SDHC card at address aaaa [ 1.237037] mmc...
by morphious66
Tue Jul 02, 2019 9:37 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 951
Views: 114439

Re: Raspberry Pi 4 Thread - general discussion

Timing buffered disk reads: 132 MB in 3.00 seconds = 43.95 MB/sec That looks to be a little more the double the 3 B+ I wonder if this is due to a DDR50 increase or a clock speed increase. can you test for this one? Raspberry Pi Dramble microSD benchmarks Should see something like this: microSD cloc...
by morphious66
Tue Jul 02, 2019 8:15 pm
Forum: General discussion
Topic: Fastest Micro SD card for Pi 4? Does it support XC U3?
Replies: 38
Views: 9994

Re: Fastest Micro SD card for Pi 4? Does it support XC U3?

Perhaps this is also an option to consider: The fats sd card is 19 bucks. You get SSD drives new for around 15 bucks. An SATA USB adapter for around 8 bucks. Boot from sd card and put your root filesystem on ssd. If you do not mind the space. Performance is eye opening. Just did this on my new Pi 4...
by morphious66
Tue Jul 02, 2019 8:14 pm
Forum: General discussion
Topic: Fastest Micro SD card for Pi 4? Does it support XC U3?
Replies: 38
Views: 9994

Re: Fastest Micro SD card for Pi 4? Does it support XC U3?

Andyroo wrote:
Tue Jul 02, 2019 7:57 pm
Do not run A2 cards on a Pi.

The Pi does not have the correct hardware to use the A2 config and it’s a waste of money. Reports on the forum starting e these result in slower than A1 speeds :shock:
Can you share the links and or the test results showing this please?
by morphious66
Tue Jul 02, 2019 8:13 pm
Forum: General discussion
Topic: Fastest Micro SD card for Pi 4? Does it support XC U3?
Replies: 38
Views: 9994

Re: Fastest Micro SD card for Pi 4? Does it support XC U3?

Commenting here to throw in what I've attempted to gather and the responses I've received. Mostly due to trying to obtain relatively the same information a few days ago both from a independent post and responding in the mega thread quoting someone with similar questions. My thread: https://www.rasp...
by morphious66
Tue Jul 02, 2019 8:09 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 951
Views: 114439

Re: Raspberry Pi 4 Thread - general discussion

I've removed references to commands that do "download this random shellscript and execute it as root". This is universally bad practice - don't do it. There are any number of benchmarking applications out there - bonnie++ and iozone are two examples. ok, Is this a better solution? Can someone here ...
by morphious66
Tue Jul 02, 2019 5:58 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 951
Views: 114439

Re: Raspberry Pi 4 Thread - general discussion

/dev/mmcblk0: Timing buffered disk reads: 96 MB in 3.03 seconds = 31.66 MB/sec Thanks for the reply. 31.66 MB/sec seems pretty fast for a SD Card, at least on the Pi. I see https://www.pidramble.com/wiki/benchmarks/microsd-cards reports about the same rate as the fastest result for the Pi2B using a...
by morphious66
Tue Jul 02, 2019 5:27 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 951
Views: 114439

Re: Raspberry Pi 4 Thread - general discussion

Can some one with a PI 4 go to the command line interface and run the command to test the MHZ speed on the MicroSD bus Hello morphious66 : Is there a good reason for your code to need to run with "sudo"? I suspect not everyone is (or should be) comfortable downloading and running an unknown script ...
by morphious66
Tue Jul 02, 2019 5:14 pm
Forum: General discussion
Topic: Fastest Micro SD card for Pi 4? Does it support XC U3?
Replies: 38
Views: 9994

Re: Fastest Micro SD card for Pi 4? Does it support XC U3?

No, you cannot overclock the SDHC interface on the Pi 4 (at least not easily). It's also not recommended or required. I was told that before....... didn't stop me then from doing it with zero issues to date,. Outcome was a Much faster responding Pi 3. My previous results: Mod: removed insecure link...
by morphious66
Tue Jul 02, 2019 4:29 pm
Forum: General discussion
Topic: Fastest Micro SD card for Pi 4? Does it support XC U3?
Replies: 38
Views: 9994

Re: Fastest Micro SD card for Pi 4? Does it support XC U3?

I do plan to Overclock this card as I previously did with my Pi 3 - I was about to double the bus speed to 100mghz and get 31.66 MB/sec Read speeds. From this thread - https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=140461 I hope that I can do the same with the Pi 4 and get in the 75 - 100 M...
by morphious66
Tue Jul 02, 2019 4:23 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 951
Views: 114439

Re: Raspberry Pi 4 Thread - general discussion

Can some one with a PI 4 go to the command line interface and run the command to test the MHZ speed on the MicroSD bus Mod: removed insecure link Then can you place the results here? I trying to determine the best / fastest Micro SD card as per my thread here: https://www.raspberrypi.org/forums/view...
by morphious66
Tue Jul 02, 2019 3:33 pm
Forum: General discussion
Topic: Fastest Micro SD card for Pi 4? Does it support XC U3?
Replies: 38
Views: 9994

Re: Fastest Micro SD card for Pi 4? Does it support XC U3?

ok, understand - Yes this spec is Much better / faster then the Samsung card I had above. - DDR50(max bandwidth: 50MB/s) - A2 category: Random Read: 4000 IOPS - Random Write: 2000 IOPS Looks like the best that is currently available is the Sandisk https://www.sandisk.com/home/memory-cards/microsd-ca...
by morphious66
Tue Jul 02, 2019 1:18 pm
Forum: General discussion
Topic: Fastest Micro SD card for Pi 4? Does it support XC U3?
Replies: 38
Views: 9994

Fastest Micro SD card for Pi 4? Does it support XC U3?

Hello community, I'm Ready to order a Pi 4 and want to order the fastest Mcro SD card currently available. Does PI 4 support the new Class 10 XC I U3 micro SD cards? Will it take advantage of the speed increase over the U1? Want to order the best / fastest micro SD. Looking at the https://www.samsun...

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