pci-express 8x/ pci-express 16x I confused

UpskirtHayley · 02-20-2008, 01:17 AM

what is the difference? I see some computer with pci-express 8x and some are 16x.

which is my x850xt pci-e compatible on?

hermeslyre · 02-20-2008, 01:49 AM

The amount of pins, is the difference. The number denotes a likewise number of lanes, which of course promotes extra bandwidth and by association, speed, power. The latter only becoming apparent when bandwidth is insufficient, bottlenecking. An x8 card will work in a x16 slot, as long as it physically fits.

The x850xt was PCI-e x16 so far as I know. There might have been x8 versions..

[-0MEGA-] · 02-20-2008, 02:27 AM

They never made a PCI-E x8 video card, a lot of older motherboards with AGP and PCI-E had a physical PCI-E x16 slot, however it only ran at 8x speed.

UpskirtHayley · 02-20-2008, 02:50 AM

I saw a computer at ebay that says pci-express 8x but I forgot to watch it in my watching list.

so pci-express 8x is no such thing?

hermeslyre · 02-20-2008, 02:57 AM

Makes sense. I've never seen one before.

StrangleHold · 02-20-2008, 03:13 AM

About all the AM2 Geforce 6100 boards with a nforce 400/405 only had a PCIe X16 slot that ran at X8

[-0MEGA-] · 02-20-2008, 12:16 PM

They do make PCI-E x8 slots, although they are very rare. I would bet that the motherboard you saw was a PCI-E x16 slot which ran at an x8 speed.

StrangleHold · 02-20-2008, 02:39 PM

Yea there physical X16 slots that run at X8. DFI made some boards with physical X8 and X4 slots
This one has a physical X4 slot
http://www.newegg.com/Product/Produc...82E16813136041

This one has a Physical X4 and X8 slot but the X4 slot is only at X1 if your running SLI
http://us.dfi.com.tw/Product/xx_prod...YPE=LP&SITE=US

02-20-2008, 01:17 AM	#1 (permalink)
UpskirtHayley Gold Member Join Date: Jan 2008 Posts: 495	pci-express 8x/ pci-express 16x I confused what is the difference? I see some computer with pci-express 8x and some are 16x. which is my x850xt pci-e compatible on?

02-20-2008, 02:27 AM	#3 (permalink)
[-0MEGA-] VIP Member Join Date: Nov 2004 Location: Goffstown, NH Age: 21 Posts: 30,000	They never made a PCI-E x8 video card, a lot of older motherboards with AGP and PCI-E had a physical PCI-E x16 slot, however it only ran at 8x speed. __________________ i7 920 eVGA E758-A1 X58 ATI 4870 X2 2GB GDDR5 6GB (3x2GB) XMS3 DDR3 1600 300GB Raptor // 2x 750GB // 3x 1.5TB Creative SB X-Fi Titanium Fatal1ty SilverStone 750W +12V@60A www.geoffjohnsonphotography.com

02-20-2008, 03:13 AM	#6 (permalink)
StrangleHold VIP Member Join Date: Nov 2005 Location: Every now and then. Posts: 12,557	About all the AM2 Geforce 6100 boards with a nforce 400/405 only had a PCIe X16 slot that ran at X8 __________________ NZXT Beta EVO Modded PC P&C S75QB 750W Phenom II 1055T ZEROtherm FZ-120 Gigabyte GA-MA790XT UD4P G Skill DDR3 1600 4gb. Sapphire 5850 G Skill Phoenix Pro 60gb. Seagate 7200.12 500gb. Welcome to the show

02-20-2008, 12:16 PM	#7 (permalink)
[-0MEGA-] VIP Member Join Date: Nov 2004 Location: Goffstown, NH Age: 21 Posts: 30,000	They do make PCI-E x8 slots, although they are very rare. I would bet that the motherboard you saw was a PCI-E x16 slot which ran at an x8 speed. __________________ i7 920 eVGA E758-A1 X58 ATI 4870 X2 2GB GDDR5 6GB (3x2GB) XMS3 DDR3 1600 300GB Raptor // 2x 750GB // 3x 1.5TB Creative SB X-Fi Titanium Fatal1ty SilverStone 750W +12V@60A www.geoffjohnsonphotography.com

02-20-2008, 02:39 PM	#8 (permalink)
StrangleHold VIP Member Join Date: Nov 2005 Location: Every now and then. Posts: 12,557	Yea there physical X16 slots that run at X8. DFI made some boards with physical X8 and X4 slots This one has a physical X4 slot http://www.newegg.com/Product/Produc...82E16813136041 This one has a Physical X4 and X8 slot but the X4 slot is only at X1 if your running SLI http://us.dfi.com.tw/Product/xx_prod...YPE=LP&SITE=US __________________ NZXT Beta EVO Modded PC P&C S75QB 750W Phenom II 1055T ZEROtherm FZ-120 Gigabyte GA-MA790XT UD4P G Skill DDR3 1600 4gb. Sapphire 5850 G Skill Phoenix Pro 60gb. Seagate 7200.12 500gb. Welcome to the show

02-20-2008, 01:49 AM	#2 (permalink)
hermeslyre VIP Member Join Date: Feb 2007 Location: Portland, Oregon Age: 20 Posts: 4,973	The amount of pins, is the difference. The number denotes a likewise number of lanes, which of course promotes extra bandwidth and by association, speed, power. The latter only becoming apparent when bandwidth is insufficient, bottlenecking. An x8 card will work in a x16 slot, as long as it physically fits. The x850xt was PCI-e x16 so far as I know. There might have been x8 versions..

02-20-2008, 02:50 AM	#4 (permalink)
UpskirtHayley Gold Member Join Date: Jan 2008 Posts: 495	I saw a computer at ebay that says pci-express 8x but I forgot to watch it in my watching list. so pci-express 8x is no such thing?

02-20-2008, 02:57 AM	#5 (permalink)
hermeslyre VIP Member Join Date: Feb 2007 Location: Portland, Oregon Age: 20 Posts: 4,973	Makes sense. I've never seen one before.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Newbie with Linux...	codeman0013	Operating Systems	34	01-04-2009 07:20 PM
Need PROFESSIONAL help on buying a new computer.	audiobahn1000	Desktop Computers	28	12-23-2008 07:11 AM
PCI Express or PCI Express 16?	anil099	Desktop Computers	7	05-18-2006 07:18 AM
PCI Express 16x or AGP 8x PRo...Faster?	randruff	Video Cards and Monitors	7	05-04-2005 11:19 PM
What does AGP 8x and PCI Express 16x stand for?	jancz3rt	Video Cards and Monitors	17	12-02-2004 07:11 PM