Can I fit gpu and pcie ssd on my motherboard without losing performance?

Roxas2030 · Jul 7, 2016

Hey guys, I have a Fatal1ty Z77 Professional-M motherboard. It's currently equipped with a GTX 1070. If I wanted to put a Samsung 850 EVO M.2 Series 250GB SATA III M.2 would I see performance loss? Would the gpu perform worse if I added a pcie ssd? Much thanks!

Barty1884 · Jul 7, 2016

The 850 EVO M.2 is a SATA based M.2 SSD, so will operate over SATA speeds (max theoretical 6GB/s assuming you connect to a SATA3 port).

If you were to add a true PCIe based SSD, it'll likely require a PCIe x4 or x8 slot, which you have available, and can run in conjunction with your GPU.

If it needs PCIe x4, you're fine. There won't be any impact to your GPU.

If it needs an x8 slot, your GPU x16 will become x8 as a result of utilizing both slots.
In theory, that'll impact performance a little - but in the 'real world', you're not likely to see any performance difference.

Flyfisherman · Jul 7, 2016

Well that is what I'm curies about to.

This seems to show 6 slots and 24 lanes. However when using both x16 slots both drop down to x4 speeds. This is probably where your "I did hear someone say" comes from. Not from the M2 part, even though M2 connectors can also be x4.

M2 however, can (and should) carry both SATA and PCI-e, eitherwith 2 or with 4 lanes.

In your case you can put a SATA SSD in the M2 slot. This will disable to of you normal SATA slots (see manual) and give you no speed advantage over a regular SSD. Not a good thing, unless you have a spare SATA M2 or like the smaller form factor.

If you connect a PCI-e based SSD to the M2 slot it will disable two different SATA ports, but you will potentially get more speed. The manual does not mention reducing lanes the the x16 slots. Those will be unaffectec by the M2 SSD.

Fewer lanes does mean less maximum thoughput. I reasonable guess is that using two PCI-e devices in both x16 slots will drop the performance of the cards by about 4%. Not much. But if you really want max gaming performance and two graphics cards then select another Z170 board, one which can power at least two slots at x8 (or fall back to older boards based on Hasswell-E (28 or 40 lanes) or X58 (40 lanes).

If you do not want extreme gaming (just very high performance gaming) then go for a single graphics card and put that in slot PCI-e #2. Put other cards in the x1 slots (you have 3 of those!) or in the other x16 slot if you can afford to drop about 4% in graphics performance.
Citat from http://superuser.com/questions/1020268/does-m-2-ssd-card-mess-with-pci-express

Best regards from Sweden

Roxas2030 · Jul 7, 2016

that sounds nice, also I meant Samsung 950 PRO Series - 256GB PCIe NVMe - M.2 Internal SSD, which uses x4. in that sense I should be fine correct?

Flyfisherman · Jul 7, 2016

Yes.
More than perfect.

I myself have this configuration:
Motherboard: Asus Z97 Deluxe
CPU: Intel Core i7 4790K @4.6GHz
Memory: 16GB 2133MHz Cl11 G-Skill
Monitor: 2x BenQ 24"1 920x1080
Graphic: ASUS Radeon R9 290 4GB
C: SSD: Intel 520 180GB for Windows and some essential s/w
D: SSD: Samsung 850 Pro 1TB for all other s/w including games etc.
H: HDD: WD Velociraptor 10 000rpm 450GB
F: HDD: WD Black Caviar 2TB
E: HDD Samsung 1TB for other things
G: HDD: Seagate 3TB
The last one for backup mainly.

Best regards from Sweden
Ps. But I'm looking for a m2. ssd myself and as I can figured it out, it will not hamper the speed of my installed machinery, as I can understand.

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Can I fit gpu and pcie ssd on my motherboard without losing performance?

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