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Bandwidth limitation?

yikchandev
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I have 9700k, Asus z390-e, and rtx 2070 super.

 

I currently have a 500gb 970 evo Samsung nvme installed on the second m.2 slot. Also a crucial mx500 500gb installed via sata. 

 

I have a 1tb 970 pro nvme coming in the mail. Will installing both m2 drives limit the bandwidth of my gpu? 

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While technically they may share bandwidth, in real-world use its unlikely you're going to be trying to push maximum bandwidth on the NVME drives AND the GPU at the same time.

 

I've never seen my RTX 2080 use half the PCIe bus, an NVME drive only hits top speed for very short bursts, I doubt its something you would notice.

ASUS B650E-F GAMING WIFI + R7 7800X3D + 2x Corsair Vengeance 32GB DDR5-6000 CL30-36-36-76  + ASUS RTX 4090 TUF Gaming OC

Router:  Intel N100 (pfSense) Backup: GL.iNet GL-X3000/ Spitz AX Switches: Netgear MS510TXUP, MS510TXPP, GS110EMX
WiFi6: Zyxel NWA210AX (1.7Gbit peak at 160Mhz) WiFi5: Ubiquiti NanoHD OpenWRT (~500Mbit at 80Mhz)
ISPs: Zen Full Fibre 900 (~930Mbit down, 115Mbit up) + Three 5G (~1200Mbit down, 115Mbit up, variable)
Upgrading Laptop/Desktop CNVIo WiFi 5 cards to PCIe WiFi6e/7

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No it won't, instead the two M.2 drives (along with other stuff like the SATA SSD) will compete for bandwidth as those are all connected to the chipset, sharing the DMI 3 connection to the CPU with PCie 3.0 x4 equivalent of bandwidth

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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2 minutes ago, Jurrunio said:

No it won't, instead the two M.2 drives (along with other stuff like the SATA SSD) will compete for bandwidth as those are all connected to the chipset, sharing the DMI 3 connection to the CPU with PCie 3.0 x4 equivalent of bandwidth

Is it AMD that shares with the PCIe x16 slot?

ASUS B650E-F GAMING WIFI + R7 7800X3D + 2x Corsair Vengeance 32GB DDR5-6000 CL30-36-36-76  + ASUS RTX 4090 TUF Gaming OC

Router:  Intel N100 (pfSense) Backup: GL.iNet GL-X3000/ Spitz AX Switches: Netgear MS510TXUP, MS510TXPP, GS110EMX
WiFi6: Zyxel NWA210AX (1.7Gbit peak at 160Mhz) WiFi5: Ubiquiti NanoHD OpenWRT (~500Mbit at 80Mhz)
ISPs: Zen Full Fibre 900 (~930Mbit down, 115Mbit up) + Three 5G (~1200Mbit down, 115Mbit up, variable)
Upgrading Laptop/Desktop CNVIo WiFi 5 cards to PCIe WiFi6e/7

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2 minutes ago, Alex Atkin UK said:

Is it AMD that shares with the PCIe x16 slot?

No, Ryzen has 4 lanes for M.2 SSD, 16 lanes for GPU (cut to 8 on APUs) and 4 lanes for chipset. There are boards like the Asus B450-I that cuts GPU bandwidth for an extra M.2 slot (total of 2) but this is not the norm

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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28 minutes ago, Jurrunio said:

No, Ryzen has 4 lanes for M.2 SSD, 16 lanes for GPU (cut to 8 on APUs) and 4 lanes for chipset. There are boards like the Asus B450-I that cuts GPU bandwidth for an extra M.2 slot (total of 2) but this is not the norm

Good to know, a lot of people on the forum seemed to think that M.2 shares with the first PCIe slot so I really wasn't sure how common it was.

ASUS B650E-F GAMING WIFI + R7 7800X3D + 2x Corsair Vengeance 32GB DDR5-6000 CL30-36-36-76  + ASUS RTX 4090 TUF Gaming OC

Router:  Intel N100 (pfSense) Backup: GL.iNet GL-X3000/ Spitz AX Switches: Netgear MS510TXUP, MS510TXPP, GS110EMX
WiFi6: Zyxel NWA210AX (1.7Gbit peak at 160Mhz) WiFi5: Ubiquiti NanoHD OpenWRT (~500Mbit at 80Mhz)
ISPs: Zen Full Fibre 900 (~930Mbit down, 115Mbit up) + Three 5G (~1200Mbit down, 115Mbit up, variable)
Upgrading Laptop/Desktop CNVIo WiFi 5 cards to PCIe WiFi6e/7

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3 hours ago, Jurrunio said:

No it won't, instead the two M.2 drives (along with other stuff like the SATA SSD) will compete for bandwidth as those are all connected to the chipset, sharing the DMI 3 connection to the CPU with PCie 3.0 x4 equivalent of bandwidth

So should I not install both on the same board? 

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56 minutes ago, yikchandev said:

So should I not install both on the same board? 

Just dont expect them to reach full speeds together

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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