Intel 750 PCIe SSD 1.2TB Slow Benchmarks on CrystalDiskMark??

[TScha5]

Is anybody getting slow speeds with the Intel 750 SSD after updating to the Intel NVMe Drivers? I'm not positive that the speeds I'm getting are, in fact, slow but I have posted some pics below along with a comparison pic of a https://www.youtube.com/watch?v=JMSq8nmDTO0 video on YouTube by Asus and Intel where their speeds are much greater for some of the tests. I believe I set the test correctly. I set it to 3 (not sure what that is) and 8GB (not really sure what that is either but they say to do that in the video). Just looking for any input or ideas... And maybe I'm just being overly neurotic about the numbers matching exactly but in some cases their numbers are literally double what mine are, and I have the Intel NVMe drivers installed...soooooo....not sure what to do, or if there even is anything I can do at this point...????

PC Build:

CPU: i7-6700k Skylake

MoBo: GA-Z170X Gaming 7 Gigabyte Motherboard (BIOS: F6b)

RAM: 16GB G.Skill DDR4

Primary Drive: Intel 750 PCIe SSD 1.2TB (Intel Driver 1.3.0.1007 (Latest))

Secondary Drive: 8TB HGST UltraStar HDD 7200RPM

This was the test prior to installing Intel NVMe drivers.... (my apologies for the sideways pics....)

This is after installing Intel NVMe drivers......

HOWEVER, if you look at the benchmarks from thehttps://www.youtube.com/watch?v=hxpwmrmw6jI Intel 750 Interview by Intel and Asus on YouTube....at 20:15 their speeds are significantly higher for Seq, 4k, and 4kQ32T1.....

As you can see, their 4K Reads/Writes are double mine. And the "Seq" numbers are significantly greater as well.

I believe I have installed the proper Intel NVMe drivers but I took some pics just in case... from reading other posts here at the Intel Community Forum I realized I was initially looking in the wrong place b/c I was thinking I couldn't get the Intel drivers to install b/c I was looking at the disk drive details..like below...

So I looked at the Storage Controller in Device Manager...

So I guess my question is why am I getting such slow speeds if I've done everything I can to get this working right.....??????????? Any ideas..??

Thanks,

Tyson

[nbocc]

tysoncreative wrote:

Is that not right? Why would it be routed over the PCH?

Yes, it's true the processor has 20 lanes available. However, if your discrete GPU is occupying 16 lanes, the remaining 4 are for the DMI connection to the PCH. Prior to Skylake, the DMI was running at 4 lanes Gen 2.0 creating a massive bottleneck (~1.5GB/s max realized xfer speed) so the drive was a worthless purchase if not linked directly to the CPU. With z170, there is an additional 20 Gen 3.0 lanes available on the PCH (that's why the article says with Z170, not with intel 6th gen cpus), however, all data is still routed over the DMI.

I don't know your motherboard..it may not be possible, but you definitely would need to see your GPU reduced to 8x speed or slower in GPUz. At that point 4 of your CPU lanes would be unused. No big deal. I can't do this because I have the 2.5" and a limited ITX board.

This is my system:

i5-6600k

Asus Maximus 8 Impact

16GB TridentZ 2800MHz Ram

2.5" Intel 750 ssd 400GB firmware 8EV10171 w/ driver 1.3.0.1007

No other storage devices

With your initial post you had decent numbers except for the Q32T1. You just needed to change it to T4 or 8 for that one 4k test. I however have a problem. My numbers are quite worse than yours. See attached. I've tried everything including suggestions from Jonathan. I may need to open a service request with intel on mine.

[TScha5]

Yup. You were right. Once I figured out where to go to change it to T8 the numbers are looking much better. I have attached results below. Everything looks basically ok at this point. The only thing that confuses me is the bottom 4k reading. It doesn't seem to change no matter what. But maybe that doesn't matter....?? Are the only ones that are important the top 2 numbers? Meaning the Q32... numbers?

[TScha5]

Oh and here's the actual printout of the CrystalDiskMark results.... for IOPS... and to see how it was setup...

[jbenavides]

Hello tysoncreative,

The numbers from the last test are low due to the configuration it uses, it is Random Read test using 4K, no queuing and a single worker (data thread):

Random Read 4KiB (Q= 1,T= 1) : 35.219 MB/s [ 8598.4 IOPS]

As we mentioned before, the Intel® 750 SSD is designed to work better with queuing and multiple threads as it would normally be under normal system operation. For example, the advertised performance is obtained with Queue depth 32 and 4 threads.

Queue Depth allows the SSD to have multiple requests from the host at the same time by enabling the concurrent processing of commands that the host can queue up.

Higher queue depths typically allow the SSD to generate higher IOPS through concurrent processing of commands. However, just keep in mind that if the queue size goes beyond the drive's specifications, latency may be increased.

[CBark1]

Where can I find more data comparing the performance of an Intel 750 series ssd (1.2TB HHHL) operating on native PCI-E lanes from the CPU vs PCH supplied lanes. (6700k, and z170.)