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Graphics PCIE 16 slots

Daniel91
By Daniel91
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Go to solution Solved by Archangel1994,

Running at 4x there is actually a difference, part of why Nvidia won't allow SLI on 4x

http://images.pugetsystems.com/images/pic_disp.php?id=25616&width=601

 

The FPS difference is within margin of error and these cards ran in both PCIe 2.0 8x (Which is PCIe 3.0 4x) and PCIe 3.0 8/16x. There is no noticeable difference. Nvidia restricts is because SLI is incredibly restricted.

Posted

ok I know there are 3 pcir 16 slot settings but can soeone explaine to me x4

 

my friend said that I shouldn't get Matx boards because most of them are X 16 and X4 , ether go full ATX or go ITX

 

I told him I'm running AMD crossfire and not SLI so I don't see  any diffrence so he laughed and called me a noob

 

OK so I started tinkering with PCs this year I'm a bit of a noob so can anyone explain??

what's the diffrence with the X8 and the X4 other then SLI needs X8

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4x means less potential memory bandwidth. However the performance doesn't really degrade at PCIe 3.0 4x (Equal to PCIe 2.0 8x). So really, you will not notice a real difference (A few frames at most).

RIG: I7-4790k @ 4.5GHz | MSI Z97S SLI Plus | 12GB Geil Dragon RAM 1333MHz | Gigabyte G1 Gaming GTX 970 (1550MHz core/7800MHz memory) @ +18mV(Maxed out at 1650/7800 so far) | Corsair RM750 | Samsung 840 EVO 120GB, 1TB Seagate Barracuda | Fractal Design Arc Midi R2 (Closed) | Sound Blaster Z                                                                                                                        Getting: Noctua NH-D15 | Possible 250GB Samsung 850 Evo                                                                                        Need a console killer that actually shits on every console? Here you go (No MIR/Promo)

This is why you should not get an FX CPU for ANY scenario other than rendering on a budget http://linustechtips.com/main/topic/286142-fx-8350-r9-290-psu-requirements/?p=3892901 | http://linustechtips.com/main/topic/266481-an-issue-with-people-bashing-the-fx-cpus/?p=3620861

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It all comes down to bandwith. Obivously 16x will provide the most, but consumer (mainstream) grade cpus don't have enough pcie lanes to power two pcie slots at 16x, so a typical board with two pcie 16x gen 3 slots populated will run at 8x 8x mode.

Case: Corsair 4000D Airflow; Motherboard: MSI ZZ490 Gaming Edge; CPU: i7 10700K @ 5.1GHz; Cooler: Noctua NHD15S Chromax; RAM: Corsair LPX DDR4 32GB 3200MHz; Graphics Card: Asus RTX 3080 TUF; Power: EVGA SuperNova 750G2; Storage: 2 x Seagate Barracuda 1TB; Crucial M500 240GB & MX100 512GB; Keyboard: Logitech G710+; Mouse: Logitech G502; Headphones / Amp: HiFiMan Sundara / Mayflower Objective 2; Monitor: Asus VG27AQ

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4x means less potential memory bandwidth. However the performance doesn't really degrade at PCIe 3.0 4x (Equal to PCIe 2.0 8x). So really, you will not notice a real difference (A few frames at most).

Running at 4x there is actually a difference, part of why Nvidia won't allow SLI on 4x

 

 

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so what is the diffrence please explain?

Bandwith

Case: Corsair 4000D Airflow; Motherboard: MSI ZZ490 Gaming Edge; CPU: i7 10700K @ 5.1GHz; Cooler: Noctua NHD15S Chromax; RAM: Corsair LPX DDR4 32GB 3200MHz; Graphics Card: Asus RTX 3080 TUF; Power: EVGA SuperNova 750G2; Storage: 2 x Seagate Barracuda 1TB; Crucial M500 240GB & MX100 512GB; Keyboard: Logitech G710+; Mouse: Logitech G502; Headphones / Amp: HiFiMan Sundara / Mayflower Objective 2; Monitor: Asus VG27AQ

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  • Solution

Running at 4x there is actually a difference, part of why Nvidia won't allow SLI on 4x

http://images.pugetsystems.com/images/pic_disp.php?id=25616&width=601

 

The FPS difference is within margin of error and these cards ran in both PCIe 2.0 8x (Which is PCIe 3.0 4x) and PCIe 3.0 8/16x. There is no noticeable difference. Nvidia restricts is because SLI is incredibly restricted.

RIG: I7-4790k @ 4.5GHz | MSI Z97S SLI Plus | 12GB Geil Dragon RAM 1333MHz | Gigabyte G1 Gaming GTX 970 (1550MHz core/7800MHz memory) @ +18mV(Maxed out at 1650/7800 so far) | Corsair RM750 | Samsung 840 EVO 120GB, 1TB Seagate Barracuda | Fractal Design Arc Midi R2 (Closed) | Sound Blaster Z                                                                                                                        Getting: Noctua NH-D15 | Possible 250GB Samsung 850 Evo                                                                                        Need a console killer that actually shits on every console? Here you go (No MIR/Promo)

This is why you should not get an FX CPU for ANY scenario other than rendering on a budget http://linustechtips.com/main/topic/286142-fx-8350-r9-290-psu-requirements/?p=3892901 | http://linustechtips.com/main/topic/266481-an-issue-with-people-bashing-the-fx-cpus/?p=3620861

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