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Will the 8 PCIe lanes of the 3400G bottleneck me when I get a gpu?

AeroMagnus
By AeroMagnus
in CPUs, Motherboards, and Memory
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Just planning a build and if I don't get to fit in a gpu this black friday I'll have to get a 3400G instead of a 2600 so I was reading the specs and it says it only has 8 PCIe lanes and I think graphics usually take up 16? I don't know 

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PCIe 3.0 X8 is plenty for modern graphics cards, in all but the most extreme cases. 

I WILL find your ITX build thread, and I WILL recommend the SIlverstone Sugo SG13B

 

Primary PC:

i7 8086k - EVGA Z370 Classified K - G.Skill Trident Z RGB - WD SN750 - Jedi Order Titan Xp - Hyper 212 Black (with RGB Riing flair) - EVGA G3 650W - dual booting Windows 10 and Linux - Black and green theme, Razer brainwashed me.

Draws 400 watts under max load, for reference.

 

How many watts do I need? ATX 3.0 & PCIe 5.0 spec, PSU misconceptions, protections explained, group reg is bad

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8 lanes is fine, any GPU that benefits from more lanes will be bottlenecked by the CPU first.

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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You will be more limit by the 3400G itself then the 8 lanes. There is only a 2-3% gain from 8 to 16 lanes.

Main System: Ryzen 2700, Asus Crosshair VII Hero, EVGA GTX 1080ti SC, 970 EVO Plus NVMe, Crucial Ballistix 3200mhz CL14, CM H500, CM ML240L cpu cooler.

Second System: Ryzen 2400G, Gigabyte B450 DS3H, RX 580 Nitro+, Kingston A400 SSD, Team T-Force 3200mhz CL15

If it ain't overclocked it ain't good...

 

AM4 boards VRM rating list: https://docs.google.com/spreadsheets/d/1d9_E3h8bLp-TXr-0zTJFqqVxdCR9daIVNyMatydkpFA/htmlview?sle=true#gid=639584818

Buildzoid's AM4 motherboard roundup: https://www.youtube.com/watch?v=ti38JS8RuPU

 

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