Worried about my 960 EVO M.2 SSD placement/temps/write speed !

[MasterPc]

Hi,
My Specs :
ASUS ROG STRIX Z370-G Gaming LGA 1151 Motherboard
Intel Core i7 8700k Coffee Lake Cpu
ZOTAC NVIDIA Geforce GTX 1080Ti AMP! Extreme Core Edition 11GB GDDR5X
Team Force Group Nighthawk RGB 16 GB 8gbx2 3200Mhz DDR4 Memory
Cooler Master MasterCase Pro 5 Nvidia Edition
Cooler Master MasterAir Maker 8 Cpu Cooler
EVGA 650W Golden Quality Power Supply

a picture inside of my case :

I Recently Bought a SAMSUNG SSD 960 EVO NVMe M.2 250GB and since my board is mATX and my cpu cooler is big and my gpu is extremely big as well i had to put my gpu in my second PCI_Express and so it covers my m2_1 port.(the m2_1 is behind the gpu) .i mounted my ssd behind the graphics because the m2_2 port is in front of my rams and ruins the looks of my case 😀.
is that okay that my m2 is behind my gpu ? dosent the heat from the gpu bother the ssd or make it throttle or ruin its lifetime ? my gpu is 45/47 idle and 70 on load (8-9 hours a day on load). my ssd temps on idle is 49(hw monitor) and 43(samsung magician smart) should i use the m2_2 slot next to my rams ? is it necessary ? or it wont get damaged or throttled at these temps during lifetime ? i read that its safe temps are 0-70 degrees . is it worth it to mount it vertically near the rams for the temps ? ( i had it on that slot and it was 39 degrees)

and another question i had a samsung 850 evo sata ssd 250 gb and switched to this m2 ssd and my boot speed even got higher 😀 (bios time is 12 sec right now/9-10 with 850evo) . whats wrong ? my ssd is genuine though . even alocating space for games on steam and restoring backups are very slower than my previous ssd. is is it normal ? here is its benchmark (no ram cache or cache-write enabled on it neither on my previous ssd) :

(i compared my write speed to same ssds other benchmarks its very low why is that ?! 🙁
and do the 2 m.2 ports have diffrence on my motherboard ? (speeds and ...).?

UPDATE : i enabled write cache in device manager on my ssd and my write speed got 1500 mb/s like advertised.
but im still worried about the temps and placement.

Thanks !

 

[CountMike]

Check MB manual, M.2-2 may be running in SATA mode instead of NVME. HWinfo or such a program should give you it's temperature, it tends to throttle above 65c.

 

[MasterPc]

Update : i switched my ssd from behind my gpu m.2_1 to m.2_2 next to my rams that is in between my cpu cooler fan and case fan (between airflow) it's temps droped from idle 45-46 to 35. and about the speeds i was worried about it was because i disabled write/cache :| i turned it back on and i got 3400 mb/s read and 1500 mb/s write speed same as advertised and other people's benchs!
Problem Solved.