Overclock.net › Forums › Graphics Cards › Graphics Cards - General › Memory interface, 128bit or 256bit differ??
New Posts  All Forums:Forum Nav:

Memory interface, 128bit or 256bit differ??

post #1 of 7
Thread Starter 
I wanted to ask this question for a long time, what's the performence difference between a graphic card that has 128bit memory interface & a card with 256bit?? And how the number of pipelines affect the overall performence??
E4500
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4500 XFX nForce 680i LT SLI EVGA GTX 470 4x1G OCZ Gold XTC 
Hard DriveOptical DriveOSMonitor
Western Digital 1TB LG DVD-RW Windows 7 Home 64-Bit Samsung Sync Master2343 
PowerCase
ULTRA LSP750 750-Watt CoolerMaster Centurion 
  hide details  
Reply
E4500
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4500 XFX nForce 680i LT SLI EVGA GTX 470 4x1G OCZ Gold XTC 
Hard DriveOptical DriveOSMonitor
Western Digital 1TB LG DVD-RW Windows 7 Home 64-Bit Samsung Sync Master2343 
PowerCase
ULTRA LSP750 750-Watt CoolerMaster Centurion 
  hide details  
Reply
post #2 of 7
the memory bit interface has to do with how much information can enter of leave the ram at any one time, so more is better. the number of pipelines is the number of pixels that the card can put out at one time
post #3 of 7
Quote:
Originally Posted by kevg73 View Post
the memory bit interface has to do with how much information can enter of leave the ram at any one time, so more is better. the number of pipelines is the number of pixels that the card can put out at one time
Well, the number of pixels which can be texture processed / clock cycle of the GPU. But, each GPU differs in how many ops/cycle they can handle. That's why tools like 3DMark06 are the only way to really judge the horsepower of any given video card.
TITAN-6
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600K @ 4GHZ ASRock Extreme 3 Gen 3 Gigabyte Nvidia GTX 570 8GB G.skill Sniper DDR3 1866 
Hard DriveOptical DriveCoolingOS
Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MATSHITA BD-CMB UJ160 Blu Ray DVD writer Cooler Master Hyper 212+ Windows 7 x64 
MonitorMonitorKeyboardPower
Sceptre 24" LCD BENQ 3D 24" LCD Logitech G510 Corsair 750W HX professional single rail 
CaseMouseMouse PadAudio
CM Storm Sniper Razer Naga left-handed version None Onboard 
  hide details  
Reply
TITAN-6
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600K @ 4GHZ ASRock Extreme 3 Gen 3 Gigabyte Nvidia GTX 570 8GB G.skill Sniper DDR3 1866 
Hard DriveOptical DriveCoolingOS
Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MATSHITA BD-CMB UJ160 Blu Ray DVD writer Cooler Master Hyper 212+ Windows 7 x64 
MonitorMonitorKeyboardPower
Sceptre 24" LCD BENQ 3D 24" LCD Logitech G510 Corsair 750W HX professional single rail 
CaseMouseMouse PadAudio
CM Storm Sniper Razer Naga left-handed version None Onboard 
  hide details  
Reply
post #4 of 7
Thread Starter 
Ok, if both Graphic card has the same# of pipeline, Coreclock, Memory speed, but different memory interface, 128bit & the other 256bit.

Will the performence be cut "half"??? (that's what I heard from ppl)
E4500
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4500 XFX nForce 680i LT SLI EVGA GTX 470 4x1G OCZ Gold XTC 
Hard DriveOptical DriveOSMonitor
Western Digital 1TB LG DVD-RW Windows 7 Home 64-Bit Samsung Sync Master2343 
PowerCase
ULTRA LSP750 750-Watt CoolerMaster Centurion 
  hide details  
Reply
E4500
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4500 XFX nForce 680i LT SLI EVGA GTX 470 4x1G OCZ Gold XTC 
Hard DriveOptical DriveOSMonitor
Western Digital 1TB LG DVD-RW Windows 7 Home 64-Bit Samsung Sync Master2343 
PowerCase
ULTRA LSP750 750-Watt CoolerMaster Centurion 
  hide details  
Reply
post #5 of 7
Quote:
Originally Posted by Ron.L View Post
I wanted to ask this question for a long time, what's the performence difference between a graphic card that has 128bit memory interface & a card with 256bit?? And how the number of pipelines affect the overall performence??
Memory has an access window. You can ask the RAM for a chunk of information, then that window of opportunity closes as the RAM goes through it's internal refresh cycle. So, if your memory interface is 256bits, the GPU can grab 256bits at once before that window closes. All things being equal, that mean the RAM is essentially double the speed of 128bit RAM.
TITAN-6
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600K @ 4GHZ ASRock Extreme 3 Gen 3 Gigabyte Nvidia GTX 570 8GB G.skill Sniper DDR3 1866 
Hard DriveOptical DriveCoolingOS
Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MATSHITA BD-CMB UJ160 Blu Ray DVD writer Cooler Master Hyper 212+ Windows 7 x64 
MonitorMonitorKeyboardPower
Sceptre 24" LCD BENQ 3D 24" LCD Logitech G510 Corsair 750W HX professional single rail 
CaseMouseMouse PadAudio
CM Storm Sniper Razer Naga left-handed version None Onboard 
  hide details  
Reply
TITAN-6
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600K @ 4GHZ ASRock Extreme 3 Gen 3 Gigabyte Nvidia GTX 570 8GB G.skill Sniper DDR3 1866 
Hard DriveOptical DriveCoolingOS
Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MATSHITA BD-CMB UJ160 Blu Ray DVD writer Cooler Master Hyper 212+ Windows 7 x64 
MonitorMonitorKeyboardPower
Sceptre 24" LCD BENQ 3D 24" LCD Logitech G510 Corsair 750W HX professional single rail 
CaseMouseMouse PadAudio
CM Storm Sniper Razer Naga left-handed version None Onboard 
  hide details  
Reply
post #6 of 7
Quote:
Originally Posted by Ron.L View Post
Ok, if both Graphic card has the same# of pipeline, Coreclock, Memory speed, but different memory interface, 128bit & the other 256bit.

Will the performence be cut "half"??? (that's what I heard from ppl)
If ALL other features are the same, but one card has double the RAM bandwidth, then yeah, in theory it would be twice as fast assuming that the GPU is being bottlenecked by the RAM. In some cases, the RAM isn't the problem. The GPU itself isn't fast enough to process the data so doubling the ram bandwidth does little good.
TITAN-6
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600K @ 4GHZ ASRock Extreme 3 Gen 3 Gigabyte Nvidia GTX 570 8GB G.skill Sniper DDR3 1866 
Hard DriveOptical DriveCoolingOS
Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MATSHITA BD-CMB UJ160 Blu Ray DVD writer Cooler Master Hyper 212+ Windows 7 x64 
MonitorMonitorKeyboardPower
Sceptre 24" LCD BENQ 3D 24" LCD Logitech G510 Corsair 750W HX professional single rail 
CaseMouseMouse PadAudio
CM Storm Sniper Razer Naga left-handed version None Onboard 
  hide details  
Reply
TITAN-6
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600K @ 4GHZ ASRock Extreme 3 Gen 3 Gigabyte Nvidia GTX 570 8GB G.skill Sniper DDR3 1866 
Hard DriveOptical DriveCoolingOS
Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MATSHITA BD-CMB UJ160 Blu Ray DVD writer Cooler Master Hyper 212+ Windows 7 x64 
MonitorMonitorKeyboardPower
Sceptre 24" LCD BENQ 3D 24" LCD Logitech G510 Corsair 750W HX professional single rail 
CaseMouseMouse PadAudio
CM Storm Sniper Razer Naga left-handed version None Onboard 
  hide details  
Reply
post #7 of 7
Thread Starter 
cleared this one out of my head, reps +
E4500
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4500 XFX nForce 680i LT SLI EVGA GTX 470 4x1G OCZ Gold XTC 
Hard DriveOptical DriveOSMonitor
Western Digital 1TB LG DVD-RW Windows 7 Home 64-Bit Samsung Sync Master2343 
PowerCase
ULTRA LSP750 750-Watt CoolerMaster Centurion 
  hide details  
Reply
E4500
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4500 XFX nForce 680i LT SLI EVGA GTX 470 4x1G OCZ Gold XTC 
Hard DriveOptical DriveOSMonitor
Western Digital 1TB LG DVD-RW Windows 7 Home 64-Bit Samsung Sync Master2343 
PowerCase
ULTRA LSP750 750-Watt CoolerMaster Centurion 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Graphics Cards - General
Overclock.net › Forums › Graphics Cards › Graphics Cards - General › Memory interface, 128bit or 256bit differ??