SM951 Performance
- Thread starter ginjaninja
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Ive just had a thought. Seen lots of reviews where this card when been benched thermally throttles.
All depends how good your airflow is inside your case and whether you have a hot graphics card near it.
Thats why i bought a few cheap ramsinks to go on mine.
it only takes 2 mins of constant benchmarking to get these thermally throttling.
http://www.anandtech.com/show/8979/samsung-sm951-512-gb-review/11
difference with or without heatsinks can be as much as 600Mb/s in benchmark tests!
http://www.anandtech.com/show/9396/samsung-sm951-nvme-256gb-pcie-ssd-review/2
In real life i doubt you will get mcuh thermal throttling but its soemthing that you should be aware of. Perhaps people with better benchmark results just have cooler cases with better airflow?
All depends how good your airflow is inside your case and whether you have a hot graphics card near it.
Thats why i bought a few cheap ramsinks to go on mine.
it only takes 2 mins of constant benchmarking to get these thermally throttling.
http://www.anandtech.com/show/8979/samsung-sm951-512-gb-review/11
difference with or without heatsinks can be as much as 600Mb/s in benchmark tests!
http://www.anandtech.com/show/9396/samsung-sm951-nvme-256gb-pcie-ssd-review/2
In real life i doubt you will get mcuh thermal throttling but its soemthing that you should be aware of. Perhaps people with better benchmark results just have cooler cases with better airflow?
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It has worked well for me with both bios 0904 and 1702.
But always worth updating to the latest bios, especially if you have something strange going on... then don't forget to reset to defaults after applying the bios, save and restart before re-configuring.
But always worth updating to the latest bios, especially if you have something strange going on... then don't forget to reset to defaults after applying the bios, save and restart before re-configuring.
Thanks for the thoughts.
But putting rams sinks on was one of the first thing I did when I bought the drive a month ago
CDM, if you only run the one test only takes 20 second or so to complete.
But just to be sure Ive just had a desk fan blowing into the case on full speed and run the test, It made no difference at all. the drive got to 35C
Im running 1702. So probably not that then...sigh
If only I could be sure which gen the the M.2 slot was running. Just find it strange that if I want gen 3 on the graphics I have to force it, yet no option to force it on the the M.2 or slot 5 ( M.2 shares bandwidth slot 5)
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if it helps, i didnt and cant find any setting for pcie mode on m.2..all asus literature always says these are PCIe3, so im pretty sure that is not the reason.
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I assume you've tried resetting to factory defaults etc?
Yes several times.
But thanks for giving me a nudge to try it again, as Ive discovered what is happening.
I reset to defaults again and this time before rebooting I decided to have a look in the settings for the nb pcie config and low and behold there was settings there to be able to alter the gen version of all the slots, where usually I only had the option to change the gen of slot 1,2 and 4.
Saved and exited, benched and the results were even worse.
Rebooted, back in the bios into the nb pcie config and those settings had disappeared again and just left with the option to alter slot 1,2 and 4 again.
Something weird is going on.
So reset to defaults again, back into nb pcie config, those settings had re-appeared, This time before rebooting set slot 5 to gen 3.
Saved and exited, benched and the results were now as they should be.
Back in the bios, settings were gone again, but this time after a reboot, even though they have gone gen 3 has stayed.
Just have to figure out why the settings disappear now....lol
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That's very strange... I can't say I've noticed that behaviour.
I have, however seen the two places where you can set the pcie speed... one more general setting and the other slot-specific... I have them all at 3
I have, however seen the two places where you can set the pcie speed... one more general setting and the other slot-specific... I have them all at 3
So you have the option to change the gen on all of the 5 slots all of the time ?
This is how mine looks after a reboot
Ive been trying all sorts today and cannot get the option there unless I "load optimised defaults" and still disappears after a reboot.
Can you do me a favour please and actually confirm that you have the option to set the gen version for slots 3 and 5.
It'd be much appreciated.
Its in Advanced > System agent configuration > NB PCI-e configuration
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youve considered that the asus manual says m.2 shares bandwidth with one of the pcie slots?
Yes it does. It shares with slot 5. If I force gen 3 on slot 5 then the 951 performs at full speed.
The problem I'm having now is the BIOS is not displaying the options for all of the slots all of the time.
Read a few posts back
Suppose now I ort to create a new thread in the motherboard section, as your thread is going a bit OT
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Here's a few snapshots... doesn't look to be all that different from yours 
Here's a few snapshots... doesn't look to be all that different from yours
http://i.imgur.com/iBnvF25.jpg
http://i.imgur.com/8OymcqQ.jpg
http://i.imgur.com/OKK1lg8.jpg
Thanks allot for taking the time to confirm that, saved me from pulling out what's left of my hair out
.It is identical, even in the second image, if you reset to defaults underneath the option for the speed for the 4x slot should be an option to change the speed for slot 5
In your 3rd image that is just the speed the NB talks to the PCH from what I can tell is normal
Im guessing they are camera shots, if you want to take screenies of the bios just insert a usb stick and press f12.
thanks again.