Overclock.net › Forums › Components › Memory › i7 - Why use tri-channel RAM?
New Posts  All Forums:Forum Nav:

i7 - Why use tri-channel RAM? - Page 4

post #31 of 37
Ok test results using aida64. Unfortunately I do not have a triple and dual channel kit of the same size to get a really good test but the results.

Triple Test Average: 12 gb (3 x 4gb) corsair vegeance 9-9-9-24 CR2
Read:13191 MB/s
Write:11393 MB/s
Copy: 12306 MB/s
Latency: 60.2 ns

Dual Test Average: 8gb (2x4gb) corsair vegeancr 9-9-9-24
Read:13278 MB/s
Write: 11394 MB/s
Copy: 11879 MB/s
Latency: 52.1 ns


For each test I did 3 runs and took the average. With the exception of latency the results seem to be pretty close.

The big thing though and this is huge, with 3 sticks I could not get stable at anything over 3.86ghz. Previously I'd tried the next mult for 3.990 (133x30) and I stopped at 1.33v and still was unstable. Now with 2x4gb I can hit 4.02 (134x30) at 1.3v.

I might donate the other stick to my i3 rig, it's running 1x4gb of the same ram now.
Edited by cavallino - 3/18/11 at 12:11pm
XEON POWER
(17 items)
 
  
CPUMotherboardGraphicsRAM
Xeon E3-1280 V2 Asus p8h77-i EVGA GTX 570  Corsair Dominator Platinum 1866 cl9 16gb 2x8gb 
Hard DriveHard DriveHard DriveOptical Drive
Samsung Spinpoint F3 Samsung 830 Crucial C300 Samsung USB Blu-Ray 
OSMonitorMonitorKeyboard
Windows 8 Dell U2711 HP 2709m Razer Blackwidow 
PowerCaseMouseMouse Pad
Silverstone Strider Essentials ST60ES-F Bitfenix Prodigy Razer Naga Molten razer sphex 
Audio
onboard 
  hide details  
Reply
XEON POWER
(17 items)
 
  
CPUMotherboardGraphicsRAM
Xeon E3-1280 V2 Asus p8h77-i EVGA GTX 570  Corsair Dominator Platinum 1866 cl9 16gb 2x8gb 
Hard DriveHard DriveHard DriveOptical Drive
Samsung Spinpoint F3 Samsung 830 Crucial C300 Samsung USB Blu-Ray 
OSMonitorMonitorKeyboard
Windows 8 Dell U2711 HP 2709m Razer Blackwidow 
PowerCaseMouseMouse Pad
Silverstone Strider Essentials ST60ES-F Bitfenix Prodigy Razer Naga Molten razer sphex 
Audio
onboard 
  hide details  
Reply
post #32 of 37
Ok I did some further testing. Despite the results of the memory specific benchmarks I was getting worse results on the benchmarks that combined cpu and memory which was odd. Photoworxx and AES really dropped desipte the 250 mhz increased in frequency. Additionally my 3dmark score results dropped especially the cpu reliant physics score.

I switched one DIMM with my i3 rig to get back to 3x4gb and now I suddenly seem to be able to run 4.00ghz with 3 dimms. Very odd, is it possible I just had 1 slightly bad dimm?

I will do a longer stability test to be sure but usually if I am 30-minutes stable with aida64 I seem to be stable in everything.

Here is the average of 3 runs at 4.00ghz (134x30) with 12gb (3x4gb) same timings
Read:13302 MB/s
Write:11509 MB/s
Copy:12455 MB/s
Latency:60.8 ns
XEON POWER
(17 items)
 
  
CPUMotherboardGraphicsRAM
Xeon E3-1280 V2 Asus p8h77-i EVGA GTX 570  Corsair Dominator Platinum 1866 cl9 16gb 2x8gb 
Hard DriveHard DriveHard DriveOptical Drive
Samsung Spinpoint F3 Samsung 830 Crucial C300 Samsung USB Blu-Ray 
OSMonitorMonitorKeyboard
Windows 8 Dell U2711 HP 2709m Razer Blackwidow 
PowerCaseMouseMouse Pad
Silverstone Strider Essentials ST60ES-F Bitfenix Prodigy Razer Naga Molten razer sphex 
Audio
onboard 
  hide details  
Reply
XEON POWER
(17 items)
 
  
CPUMotherboardGraphicsRAM
Xeon E3-1280 V2 Asus p8h77-i EVGA GTX 570  Corsair Dominator Platinum 1866 cl9 16gb 2x8gb 
Hard DriveHard DriveHard DriveOptical Drive
Samsung Spinpoint F3 Samsung 830 Crucial C300 Samsung USB Blu-Ray 
OSMonitorMonitorKeyboard
Windows 8 Dell U2711 HP 2709m Razer Blackwidow 
PowerCaseMouseMouse Pad
Silverstone Strider Essentials ST60ES-F Bitfenix Prodigy Razer Naga Molten razer sphex 
Audio
onboard 
  hide details  
Reply
post #33 of 37
i get 39ns in triple ch
post #34 of 37
Yeah my ram sort of sucks in triple or dual. At least the voltage is low.
XEON POWER
(17 items)
 
  
CPUMotherboardGraphicsRAM
Xeon E3-1280 V2 Asus p8h77-i EVGA GTX 570  Corsair Dominator Platinum 1866 cl9 16gb 2x8gb 
Hard DriveHard DriveHard DriveOptical Drive
Samsung Spinpoint F3 Samsung 830 Crucial C300 Samsung USB Blu-Ray 
OSMonitorMonitorKeyboard
Windows 8 Dell U2711 HP 2709m Razer Blackwidow 
PowerCaseMouseMouse Pad
Silverstone Strider Essentials ST60ES-F Bitfenix Prodigy Razer Naga Molten razer sphex 
Audio
onboard 
  hide details  
Reply
XEON POWER
(17 items)
 
  
CPUMotherboardGraphicsRAM
Xeon E3-1280 V2 Asus p8h77-i EVGA GTX 570  Corsair Dominator Platinum 1866 cl9 16gb 2x8gb 
Hard DriveHard DriveHard DriveOptical Drive
Samsung Spinpoint F3 Samsung 830 Crucial C300 Samsung USB Blu-Ray 
OSMonitorMonitorKeyboard
Windows 8 Dell U2711 HP 2709m Razer Blackwidow 
PowerCaseMouseMouse Pad
Silverstone Strider Essentials ST60ES-F Bitfenix Prodigy Razer Naga Molten razer sphex 
Audio
onboard 
  hide details  
Reply
post #35 of 37
Thread Starter 
Quote:
Originally Posted by cavallino View Post
Yeah my ram sort of sucks in triple or dual. At least the voltage is low.
Sounds like you're using the same RAM as me - Corsair Vengeance 1600s, 3 x 4GB, 1.5V.
post #36 of 37
Thread Starter 
Quote:
Originally Posted by redhat_ownage View Post
i get 39ns in triple ch
That's because you've got your uncore running at 3.8GHz...

It's the differential between triple and dual channel performance for a particular system we're looking at.

If you dropped a DIMM and tried dual channel, you'd probably get 34ns or better.
post #37 of 37
Thread Starter 
Quote:
Originally Posted by cavallino View Post
Ok I did some further testing. Despite the results of the memory specific benchmarks I was getting worse results on the benchmarks that combined cpu and memory which was odd. Photoworxx and AES really dropped desipte the 250 mhz increased in frequency. Additionally my 3dmark score results dropped especially the cpu reliant physics score.
Yeah, similar results here.

My 3DMark11 result is about 50 points higher with triple channel. A small change though, so this could be just down to normal test variation.

The Photoworx test is a whacking great 8500 points improved with triple ch. No doubt here triple channel wins - by about 18%.

All other AIDA64 tests showed no significant difference - apart from latency score of course.

Cinebench 11.5 OpenGL bench favours dual channel by about 4%.

AvP bench shows no difference.

Would be good to test Crysis but I a haven't got it installed.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Memory
Overclock.net › Forums › Components › Memory › i7 - Why use tri-channel RAM?