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Hot!PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect?

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ZoranC
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/02/23 12:12:22 (permalink)
harley262
ive become disenchanted with this 760 classified mb for a couple of issues with the bios, plus the i had forgotten that these 780ti are such flamethrowers and i merely wanted this board to go with those gpus for appearance only.
anyways, i moved the adapter and ssd to a p6x58d premium to see how it performs. asus is the top image, similar performance in the first two and last tests, but the third is way different. any ideas why?
 




It seems to me you are comparing apples and oranges, different block sizes, queue depths and number of threads. Take a look at second line for example: sequential 128K queue 32 thread 1 vs. 1MB queue 1 thread 1. Also keep in mind results with one CPU can't be same as ones from different CPU, more powerful per thread CPU can throw bigger load per second which will show up as higher results.
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harley262
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/02/23 14:23:14 (permalink)
ZoranC
 
It seems to me you are comparing apples and oranges, different block sizes, queue depths and number of threads. Take a look at second line for example: sequential 128K queue 32 thread 1 vs. 1MB queue 1 thread 1. Also keep in mind results with one CPU can't be same as ones from different CPU, more powerful per thread CPU can throw bigger load per second which will show up as higher results.


 
thanks, i didnt know that there be a difference between those 2 cpu (5675/975), go xeon!
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ZoranC
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/02/23 14:40:24 (permalink)
harley262
ZoranC
It seems to me you are comparing apples and oranges, different block sizes, queue depths and number of threads. Take a look at second line for example: sequential 128K queue 32 thread 1 vs. 1MB queue 1 thread 1. Also keep in mind results with one CPU can't be same as ones from different CPU, more powerful per thread CPU can throw bigger load per second which will show up as higher results.

thanks, i didnt know that there be a difference between those 2 cpu (5675/975), go xeon!

Change in CPUs power will always result in a difference. Even if you don't change neither machine nor CPU but just, say, change clock speed that will result in different values. Raising clock from 4.3GHz to 5GHz will raise these results too. Which is something I haven't seen "reviewers" take into account but instead publish charts of performance that indicates drive X is better than Y but they tested Y months/years ago on God knows what.
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yzw031
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/04/15 00:22:29 (permalink)
 
 
PCIe 1.0 is causing by NF200 chip.   E762 have two of them.
 
For details, see this:
 
www.overclock.net/threads/what-is-a-nvidia-nf200.600896
post edited by yzw031 - 2022/04/15 00:50:35
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glnzglnz
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/05/13 11:40:29 (permalink)
 
I have a related question, and this is definitely the right group of knowledgeable people to help me.
 
A couple of months ago, for my Win 10 Pro 64-bit machine, I got a SAMSUNG 970 EVO Plus SSD 2TB - M.2 NVMe Interface Internal Solid State Drive with V-NAND Technology (MZ-V7S2T0B/AM), to replace a HDD.

This Samsung 970 EVO Plus M.2 is supposed to run at up to 3,500 MBps, but I'm getting only 1,700 MBps. (I've been testing the speed using CrystalDiskMark.)

I put this NVMe in my Dell Optiplex 7010 Mini-Tower, which has an i3 CPU and 16GB RAM (running Win 10 Pro 64-bit v21H2) and a Q77 chipset, but no one else reports a speed problem in this context.

It doesn't seem to get hot. (At least not at that speed.)
 
So:
  1. Am I getting only 1,700 MBps (an not 3,500 MBps) because I have only PCIe Gen 2?
  2. Would I maybe get PCIe Gen 3 if I changed my i3 to an i5 or i7, and then would I get 3,500 MBps on this NVMe?
  3. By the way, there is at least one person out there who is getting 3,500 MBps on the same Optiplex 7010 PC - see
    article described below **  but I don't know his other specs.  (And that's an interesting article.)
And open to other suggestions !!!

Thanks.
 
**  I'm not permitted to post links here, so please google Tachytelic 7010 NVMe.  You'll see the article title "Install and boot from an NVMe SSD on a Dell OptiPlex 3010, 7010 or 9010".  Interesting article.  But please let me know your thoughts on my questions 1, 2 and 3 ,
post edited by glnzglnz - 2022/05/13 11:54:59
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rjohnson11
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/05/13 11:46:40 (permalink)
First of all how many slots of M.2 does the motherboard have? Do you have the M.2 installed in the slot closest to the CPU?

AMD Ryzen 9 5950X,  Corsair Mp600 Pro M.2, 128GB DDR4  Crosshair VIII Hero, RTX 3090ti FTW Ultra Associate Code: H5U80QBH6BH0AXF. I am NOT an employee of EVGA

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glnzglnz
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/05/13 11:52:56 (permalink)
rjohnson - to see what I did, there's an article on Tachytelic about using an NVMe to boot an Optiplex 7010 that normally does not boot from an NVMe.  I'm not permitted to post links here, so please google Tachytelic 7010 NVme.  You'll see the article title "Install and boot from an NVMe SSD on a Dell OptiPlex 3010, 7010 or 9010".  Interesting article.
 
I have the NVMe in the adapter card in the x16 PCIe slot.  It gets about 1,700 MBps.  It's a bit slower if I put it in the x4 slot.
 
What's interesting is that the author is getting 3,500 MBps on his Optiplex 7010, but I don't know his other specs.
 
Again, please see my questions 1, 2 and 3 above.  Very curious to know what you think.
 
Thanks.
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ZoranC
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/05/13 11:59:01 (permalink)
glnzglnz
 
I have a related question, and this is definitely the right group of knowledgeable people to help me.
 
A couple of months ago, for my Win 10 Pro 64-bit machine, I got a SAMSUNG 970 EVO Plus SSD 2TB - M.2 NVMe Interface Internal Solid State Drive with V-NAND Technology (MZ-V7S2T0B/AM), to replace a HDD.

This Samsung 970 EVO Plus M.2 is supposed to run at up to 3,500 MBps, but I'm getting only 1,700 MBps. (I've been testing the speed using CrystalDiskMark.)

I put this NVMe in my Dell Optiplex 7010 Mini-Tower, which has an i3 CPU and 16GB RAM (running Win 10 Pro 64-bit v21H2) and a Q77 chipset, but no one else reports a speed problem in this context.

It doesn't seem to get hot. (At least not at that speed.)
 
So:
  1. Am I getting only 1,700 MBps (an not 3,500 MBps) because I have only PCIe Gen 2?
  2. Would I maybe get PCIe Gen 3 if I changed my i3 to an i5 or i7, and then would I get 3,500 MBps on this NVMe?
  3. By the way, there is at least one person out there who is getting 3,500 MBps on the same Optiplex 7010 PC - see
    but I don't know his other specs.  (And that's an interesting article.)
And open to other suggestions !!!

Thanks.
 


PCIe one has at their disposal is determined by chipset used on motherboard and slot something is in. Q77 has Gen2 and Gen2 has maximum theoretical bandwidth of 2GB/sec in x4. So you are limited by your motherboard. If I were you I wouldn't be concerned about that, synthetic benchmarks try to see how far something can be pushed but vast majority of real world applications don't put anywhere near that much load so it is not like you are going to notice huge difference when actually using it. At least not with your system.
 
So only thing I would do, if I were you, is make sure Samsung's NVMe driver is installed and used and be done with it.
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Hoggle
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/05/13 14:50:05 (permalink)
glnzglnz
 
I have a related question, and this is definitely the right group of knowledgeable people to help me.
 
A couple of months ago, for my Win 10 Pro 64-bit machine, I got a SAMSUNG 970 EVO Plus SSD 2TB - M.2 NVMe Interface Internal Solid State Drive with V-NAND Technology (MZ-V7S2T0B/AM), to replace a HDD.

This Samsung 970 EVO Plus M.2 is supposed to run at up to 3,500 MBps, but I'm getting only 1,700 MBps. (I've been testing the speed using CrystalDiskMark.)

I put this NVMe in my Dell Optiplex 7010 Mini-Tower, which has an i3 CPU and 16GB RAM (running Win 10 Pro 64-bit v21H2) and a Q77 chipset, but no one else reports a speed problem in this context.

It doesn't seem to get hot. (At least not at that speed.)
 
So:
  1. Am I getting only 1,700 MBps (an not 3,500 MBps) because I have only PCIe Gen 2?
  2. Would I maybe get PCIe Gen 3 if I changed my i3 to an i5 or i7, and then would I get 3,500 MBps on this NVMe?
  3. By the way, there is at least one person out there who is getting 3,500 MBps on the same Optiplex 7010 PC - see
    article described below **  but I don't know his other specs.  (And that's an interesting article.)
And open to other suggestions !!!

Thanks.
 
**  I'm not permitted to post links here, so please google Tachytelic 7010 NVMe.  You'll see the article title "Install and boot from an NVMe SSD on a Dell OptiPlex 3010, 7010 or 9010".  Interesting article.  But please let me know your thoughts on my questions 1, 2 and 3 ,




The question should be do you really notice the SSD being slow? For some work you would notice the speed being double but a lot of people have trouble telling the difference between a SATA SSD and an M.2 so it's worth asking since doubling the speed from what you feel is instant is still instant.

Use an Associates Code & SAVE 5% - 10% on your purchase. Just click on the associates banner to save, or enter the associates code at checkout on your next purchase. If you choose to use my code I want to personally say "Thank You" for using it. 
 
 
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ZoranC
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/05/13 15:17:05 (permalink)
Hoggle
glnzglnz
 
I have a related question, and this is definitely the right group of knowledgeable people to help me.
 
A couple of months ago, for my Win 10 Pro 64-bit machine, I got a SAMSUNG 970 EVO Plus SSD 2TB - M.2 NVMe Interface Internal Solid State Drive with V-NAND Technology (MZ-V7S2T0B/AM), to replace a HDD.

This Samsung 970 EVO Plus M.2 is supposed to run at up to 3,500 MBps, but I'm getting only 1,700 MBps. (I've been testing the speed using CrystalDiskMark.)

I put this NVMe in my Dell Optiplex 7010 Mini-Tower, which has an i3 CPU and 16GB RAM (running Win 10 Pro 64-bit v21H2) and a Q77 chipset, but no one else reports a speed problem in this context.

It doesn't seem to get hot. (At least not at that speed.)
 
So:
  1. Am I getting only 1,700 MBps (an not 3,500 MBps) because I have only PCIe Gen 2?
  2. Would I maybe get PCIe Gen 3 if I changed my i3 to an i5 or i7, and then would I get 3,500 MBps on this NVMe?
  3. By the way, there is at least one person out there who is getting 3,500 MBps on the same Optiplex 7010 PC - see
    article described below **  but I don't know his other specs.  (And that's an interesting article.)
And open to other suggestions !!!

Thanks.
 
**  I'm not permitted to post links here, so please google Tachytelic 7010 NVMe.  You'll see the article title "Install and boot from an NVMe SSD on a Dell OptiPlex 3010, 7010 or 9010".  Interesting article.  But please let me know your thoughts on my questions 1, 2 and 3 ,




The question should be do you really notice the SSD being slow? For some work you would notice the speed being double but a lot of people have trouble telling the difference between a SATA SSD and an M.2 so it's worth asking since doubling the speed from what you feel is instant is still instant.

That is exactly why I said he wouldn't notice huge difference in actual real world use, at least not with his system, and thus shouldn't sweat it.
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glnzglnz
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/05/13 18:52:13 (permalink)
rjohnson, ZoranC and Hoggle - you are all quite correct and wise that I probably don't need the higher throughput number. 
But I have a number of these old 7010s to convert, and others are definitely getting 3,500 MBps for them.
Given your expertise, may I ask you to take another look at my questions 1, 2 and 3 above and let me have your thoughts?
Thanks.
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ZoranC
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Re: PCIe 3.0 x4 SSD on PCIe 2.0 slots, what would I expect? 2022/05/13 19:23:41 (permalink)
glnzglnz
rjohnson, ZoranC and Hoggle - you are all quite correct and wise that I probably don't need the higher throughput number. 
But I have a number of these old 7010s to convert, and others are definitely getting 3,500 MBps for them.
Given your expertise, may I ask you to take another look at my questions 1, 2 and 3 above and let me have your thoughts?

When you say "others are definitely getting 3,500 MB/sec" who/what exactly is "others"? One guy on the Web or many others? In any case, like I said, Intel's official specs for Q77 chipset say it is PCI Gen2. 970 Evo Plus is 4 lanes. Maximum theoretical bandwidth of 4 lanes in Gen2 is 2GB/sec. Thus it is impossible to get double with Gen2.
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