Overclock.net › Forums › AMD › AMD Motherboards › PCI-E x16x16 vs x8x8
New Posts  All Forums:Forum Nav:

PCI-E x16x16 vs x8x8

post #1 of 10
Thread Starter 
Hey Guys,

I have a Asus M2N-SLI Deluxe with a BFG 8800 GT OC.

The PCI-E slots in the M2N-SLI Deluxe are only at x8x8 when you have it on SLI.

1.) Would it be worth getting another BFG 8800 GT OC? (considering it will only be at x8x8)

2.) How much of a performance drop is the x8x8 setting compared to the x16x16?

Thanks
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD X2 5200+ @ 2928 MHz @ 1.475v M2N-SLI DELUXE BFG 8800 GT OC @ 720/1010 MHz 2x1 gb Crucial Balistix 6400, 2x1 gb OCZ SLI 6400 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Caviar SE16 7200rpm SATA II Samsung SH-S203N 20X SpeedPlus™ DVD-Writer w/ Ligh Windows XP Home Edition SP3 1 x 22" Samsung 2220WM & 1 x 22" Samsung 2253BW 
KeyboardPowerCaseMouse
Logitech Cordless Desktop® LX 310 Laser ANTEC TruePower Trio 550W Power Supply w/ Triple + ANTEC Nine Hundred Ultimate Gamer Case Logitech Cordless Desktop® LX 310 Laser 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD X2 5200+ @ 2928 MHz @ 1.475v M2N-SLI DELUXE BFG 8800 GT OC @ 720/1010 MHz 2x1 gb Crucial Balistix 6400, 2x1 gb OCZ SLI 6400 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Caviar SE16 7200rpm SATA II Samsung SH-S203N 20X SpeedPlus™ DVD-Writer w/ Ligh Windows XP Home Edition SP3 1 x 22" Samsung 2220WM & 1 x 22" Samsung 2253BW 
KeyboardPowerCaseMouse
Logitech Cordless Desktop® LX 310 Laser ANTEC TruePower Trio 550W Power Supply w/ Triple + ANTEC Nine Hundred Ultimate Gamer Case Logitech Cordless Desktop® LX 310 Laser 
  hide details  
Reply
post #2 of 10
The performance drop should be barley noticeable with 8800gt's.
SUPERPWN
(12 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 4670K Asus z87-Pro MSI GTX 1080 Aero 32GB DDR3 Gskill Ripjaws 
Hard DriveOSMonitorMonitor
4TB Seagate Windows 8 x64 Overlord x270 OC HP ZR27 
MonitorKeyboardPowerAudio
Asus PG279Q G-Tune Topre Realforce 800w Yulong D100 DAC with Denon D7000 headphones 
  hide details  
Reply
SUPERPWN
(12 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 4670K Asus z87-Pro MSI GTX 1080 Aero 32GB DDR3 Gskill Ripjaws 
Hard DriveOSMonitorMonitor
4TB Seagate Windows 8 x64 Overlord x270 OC HP ZR27 
MonitorKeyboardPowerAudio
Asus PG279Q G-Tune Topre Realforce 800w Yulong D100 DAC with Denon D7000 headphones 
  hide details  
Reply
post #3 of 10
Thread Starter 
why will it not be noticable with 8800 gt's? when will it be noticable?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD X2 5200+ @ 2928 MHz @ 1.475v M2N-SLI DELUXE BFG 8800 GT OC @ 720/1010 MHz 2x1 gb Crucial Balistix 6400, 2x1 gb OCZ SLI 6400 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Caviar SE16 7200rpm SATA II Samsung SH-S203N 20X SpeedPlus™ DVD-Writer w/ Ligh Windows XP Home Edition SP3 1 x 22" Samsung 2220WM & 1 x 22" Samsung 2253BW 
KeyboardPowerCaseMouse
Logitech Cordless Desktop® LX 310 Laser ANTEC TruePower Trio 550W Power Supply w/ Triple + ANTEC Nine Hundred Ultimate Gamer Case Logitech Cordless Desktop® LX 310 Laser 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD X2 5200+ @ 2928 MHz @ 1.475v M2N-SLI DELUXE BFG 8800 GT OC @ 720/1010 MHz 2x1 gb Crucial Balistix 6400, 2x1 gb OCZ SLI 6400 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Caviar SE16 7200rpm SATA II Samsung SH-S203N 20X SpeedPlus™ DVD-Writer w/ Ligh Windows XP Home Edition SP3 1 x 22" Samsung 2220WM & 1 x 22" Samsung 2253BW 
KeyboardPowerCaseMouse
Logitech Cordless Desktop® LX 310 Laser ANTEC TruePower Trio 550W Power Supply w/ Triple + ANTEC Nine Hundred Ultimate Gamer Case Logitech Cordless Desktop® LX 310 Laser 
  hide details  
Reply
post #4 of 10
Maybe 1 or 2 fps lower than 16x16
I LOVE 939
(13 items)
 
  
CPUMotherboardGraphicsRAM
Opteron 170 CCBWE 0550 UPMW ASUS A8N-SLI Deluxe EVGA 8800GT 2GB CorsairTwinX DDR500 CL3 
Hard DriveOptical DriveOSMonitor
WD250gig + WD500gig LG DVD-RAM/-R/+R/-RW x 2 Vista Ultimate Dell 20.1" Widescreen 
KeyboardPowerCaseMouse
Microsoft Cordless Hiper 580W Type-R ASUS Vento 3600 Black Logitech G7 
Mouse Pad
None 
  hide details  
Reply
I LOVE 939
(13 items)
 
  
CPUMotherboardGraphicsRAM
Opteron 170 CCBWE 0550 UPMW ASUS A8N-SLI Deluxe EVGA 8800GT 2GB CorsairTwinX DDR500 CL3 
Hard DriveOptical DriveOSMonitor
WD250gig + WD500gig LG DVD-RAM/-R/+R/-RW x 2 Vista Ultimate Dell 20.1" Widescreen 
KeyboardPowerCaseMouse
Microsoft Cordless Hiper 580W Type-R ASUS Vento 3600 Black Logitech G7 
Mouse Pad
None 
  hide details  
Reply
post #5 of 10
x16 isnt really a HUGE difference, as with 8800gt's dont really require much over 8 anyways.

x16 WILL be better, but if its worth an upgrade just for that... no.

I would wait though, get a new board in a short while and go with a 4870
Apollo
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 D0 Asus P6T Sapphire 4870X2 3x2GB OCZ Gold DDR3-1600 
Hard DriveOptical DriveOSMonitor
2 x 500gb RAID 0, 2 x 1TB Caviar Black Samsung 22x Sata DVD+-R/DL Vista x64 Acer x223w 
KeyboardPowerCaseMouse
Logitech G15 gen2 Cooler Master 850w 6 Rail Antec Twelve Hundred OCZ Equilizer 
Mouse Pad
Fellowes Ergonomic Wrist Support 
  hide details  
Reply
Apollo
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 D0 Asus P6T Sapphire 4870X2 3x2GB OCZ Gold DDR3-1600 
Hard DriveOptical DriveOSMonitor
2 x 500gb RAID 0, 2 x 1TB Caviar Black Samsung 22x Sata DVD+-R/DL Vista x64 Acer x223w 
KeyboardPowerCaseMouse
Logitech G15 gen2 Cooler Master 850w 6 Rail Antec Twelve Hundred OCZ Equilizer 
Mouse Pad
Fellowes Ergonomic Wrist Support 
  hide details  
Reply
post #6 of 10
its about 3% iirc drop in performance from 2x16 to 2x8.

makes you wonder about the why behind pcie2.....
still frags n00bs
(13 items)
 
  
CPUMotherboardGraphicsRAM
4770k z87 oc msi 290x gamer #996997 
Hard DriveCoolingOSMonitor
sandisk extreme 120 xspc raystorm winver 6.1 64 u QX2710LED 
KeyboardPowerMouse
knock off cherry reds 600w enermax volos 
  hide details  
Reply
still frags n00bs
(13 items)
 
  
CPUMotherboardGraphicsRAM
4770k z87 oc msi 290x gamer #996997 
Hard DriveCoolingOSMonitor
sandisk extreme 120 xspc raystorm winver 6.1 64 u QX2710LED 
KeyboardPowerMouse
knock off cherry reds 600w enermax volos 
  hide details  
Reply
post #7 of 10
i think its more for 'futureproofing' as far as it goes.

At least these board can handle gpus which require insane amounts of data over the pci-e bus, and users wont have to upgrade their board to be able to run these cards. I suspect the GTX280 might see a difference in 16 over 8
Apollo
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 D0 Asus P6T Sapphire 4870X2 3x2GB OCZ Gold DDR3-1600 
Hard DriveOptical DriveOSMonitor
2 x 500gb RAID 0, 2 x 1TB Caviar Black Samsung 22x Sata DVD+-R/DL Vista x64 Acer x223w 
KeyboardPowerCaseMouse
Logitech G15 gen2 Cooler Master 850w 6 Rail Antec Twelve Hundred OCZ Equilizer 
Mouse Pad
Fellowes Ergonomic Wrist Support 
  hide details  
Reply
Apollo
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 D0 Asus P6T Sapphire 4870X2 3x2GB OCZ Gold DDR3-1600 
Hard DriveOptical DriveOSMonitor
2 x 500gb RAID 0, 2 x 1TB Caviar Black Samsung 22x Sata DVD+-R/DL Vista x64 Acer x223w 
KeyboardPowerCaseMouse
Logitech G15 gen2 Cooler Master 850w 6 Rail Antec Twelve Hundred OCZ Equilizer 
Mouse Pad
Fellowes Ergonomic Wrist Support 
  hide details  
Reply
post #8 of 10
Thread Starter 
Quote:
Originally Posted by marsey99 View Post
its about 3% iirc drop in performance from 2x16 to 2x8.

makes you wonder about the why behind pcie2.....
What is "iirc"?

And also, considering that my mobo is only PCIE 1.1, not 2.0. & that it is only x8x8 in SLI, not x16x16, will i get a significant drop in FPS?
From what i am getting from marsey99 is that it will only be a 3% drop?

Also, i have a Antec Trio 550w as my PSU. Will this be enough power to run 8800 gt OC in SLI considering that i have my CPU oc'd? (in signature) The Antec trio has 3x 12 volt rails, each has 18Amps
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD X2 5200+ @ 2928 MHz @ 1.475v M2N-SLI DELUXE BFG 8800 GT OC @ 720/1010 MHz 2x1 gb Crucial Balistix 6400, 2x1 gb OCZ SLI 6400 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Caviar SE16 7200rpm SATA II Samsung SH-S203N 20X SpeedPlus™ DVD-Writer w/ Ligh Windows XP Home Edition SP3 1 x 22" Samsung 2220WM & 1 x 22" Samsung 2253BW 
KeyboardPowerCaseMouse
Logitech Cordless Desktop® LX 310 Laser ANTEC TruePower Trio 550W Power Supply w/ Triple + ANTEC Nine Hundred Ultimate Gamer Case Logitech Cordless Desktop® LX 310 Laser 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD X2 5200+ @ 2928 MHz @ 1.475v M2N-SLI DELUXE BFG 8800 GT OC @ 720/1010 MHz 2x1 gb Crucial Balistix 6400, 2x1 gb OCZ SLI 6400 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Caviar SE16 7200rpm SATA II Samsung SH-S203N 20X SpeedPlus™ DVD-Writer w/ Ligh Windows XP Home Edition SP3 1 x 22" Samsung 2220WM & 1 x 22" Samsung 2253BW 
KeyboardPowerCaseMouse
Logitech Cordless Desktop® LX 310 Laser ANTEC TruePower Trio 550W Power Supply w/ Triple + ANTEC Nine Hundred Ultimate Gamer Case Logitech Cordless Desktop® LX 310 Laser 
  hide details  
Reply
post #9 of 10
Quote:
Originally Posted by jei View Post
What is "iirc"?

And also, considering that my mobo is only PCIE 1.1, not 2.0. & that it is only x8x8 in SLI, not x16x16, will i get a significant drop in FPS?
From what i am getting from marsey99 is that it will only be a 3% drop?

Also, i have a Antec Trio 550w as my PSU. Will this be enough power to run 8800 gt OC in SLI considering that i have my CPU oc'd? (in signature) The Antec trio has 3x 12 volt rails, each has 18Amps
iirc = If I Recall Correctly


The Antec Trio 550w does not have 3 18A rails.... the specs just don't say what it really can do. If it did, the PSU would be rated for 700-800w.
Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
  hide details  
Reply
Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
  hide details  
Reply
post #10 of 10
Here's a Tom's Hardware Review. Although the article is more swayed toward ATI and xfire it still does comparisons with Nvidia cards in x16 and x18 slots as well as comparisons with pciexpress 1.0 and 2.0. The review is a few months old but it is definitely a good read all the way through.
Game System
(15 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX 8320 ASUS Crosshair V Formula-Z Asus GTX 980 TI GTX980TI-6GD5 Corsair Vengeance 
Hard DriveOptical DriveCoolingOS
Crucial BX100 SSD 1TB LG CDRW/DVDRW Liquid cooled Windows 8.1 64 bit 
MonitorKeyboardPowerCase
27" Qnix QX2710 LED Blackwidow Ultimate Battlefield 3 Edition EVGA SuperNova 1300W Rocket Fish Full Tower Custom Modded 
MouseMouse PadAudio
Razer Deathadder Razer Exactmat Logitech G900 Headset  
  hide details  
Reply
Game System
(15 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX 8320 ASUS Crosshair V Formula-Z Asus GTX 980 TI GTX980TI-6GD5 Corsair Vengeance 
Hard DriveOptical DriveCoolingOS
Crucial BX100 SSD 1TB LG CDRW/DVDRW Liquid cooled Windows 8.1 64 bit 
MonitorKeyboardPowerCase
27" Qnix QX2710 LED Blackwidow Ultimate Battlefield 3 Edition EVGA SuperNova 1300W Rocket Fish Full Tower Custom Modded 
MouseMouse PadAudio
Razer Deathadder Razer Exactmat Logitech G900 Headset  
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD Motherboards
Overclock.net › Forums › AMD › AMD Motherboards › PCI-E x16x16 vs x8x8