lesser-equity

Magazine
Go Back   Computer Juice > Computer Hardware > CPUs, Motherboards & RAM

Register


 Default 

Must FSB Speeds Match?




Reply
 
Thread Tools
  #1  
Old 20th Dec 2007, 18:39
New Member Group
 
Default Must FSB Speeds Match?

Processors list a FSB speed, and motherboards list a FSB speed. RAM also has a speed, although for some reason the units (MHz) are usually left off.

But I'm wondering, do all these speeds have to match? Or, if a slower item is paired with faster items, will they all just use the slowest speed?

Example: If you want to use a processor that has a 1066MHz FSB, do you have to use DDR2 1066 memory and a motherboard with a 1066MHz FSB?
  #2  
Old 20th Dec 2007, 20:34
Banned Group
 
Default Must FSB Speeds Match?

Ok well for processors they have a front side bus and a multiplier to get their clock speed. The bus speed that is listed is the most stable for that processor, motherboards usually can dynamically set their front side bus or it can be set with the bios. If you set your FSB too high the CPU will not be able to handle it. Now as for the memory same concept stability vs productivity. Though I would say stick with the defaults Overclocking is tricky business. The values you see are about stability.
Also I wouldn't suggest using something like a 1066 FSB motherboard with a 800 mhz memory as it will just bottleneck the system to that speed.
  #3  
Old 22nd Dec 2007, 06:45
Member Group
 
Default Must FSB Speeds Match?

So, I would would want to buy the newest CPU (i.e. Intel QX9770) which has an FSB of 1600, then the 780i mobo is DDR2 so I cannot buy 1600Mhz RAM. What would you suggest?
  #4  
Old 22nd Dec 2007, 07:09
Donor Group
 
Default Must FSB Speeds Match?

Quote:
Originally Posted by dice14u View Post
Also I wouldn't suggest using something like a 1066 FSB motherboard with a 800 mhz memory as it will just bottleneck the system to that speed.

Why not?

FSB's are quad-pumped, so a 1066 is true 266mhz.

ram is double-pumped, meaning true 400mhz.

Where's the bottleneck? Even taking into account the bandwidth requirements of a dual-core.

If you were running ram that, at true speed, was slower than the true speed of the fsb then you'd have problems, not just bottlenecks.
__________________
heard wow is a better contraceptive then the pill, no joke i played rs for 2-3 years and 2 weeks after i stopped i lost my virginity.

-Kanoakavirus
__________________

My System: Zoomy

Processor(s):
E8400 @ 3.6ghz (400x9) @ 1.15v
Motherboard:
Asus P5K Premium
RAM Memory:
2GB Dominator 8500
Graphics Card(s):
BFG 8800GT
Sound Card:
Xfi Extremegamer
Hard Drive(s):
3.35TB ext storage. 2TB int storage
Optical Drive(s):
LG GGC H20L
Case / PSU:
Enermax 720w
Cooling:
AC7
Network / Internet:
Monitor(s):
245B, 931B (Samsung)
Operating System(s):
Vista 32P
Reply

Register

Bookmarks

Similar Threads
Thread Thread Starter Forum Replies Last Post
Reported Memory Does Not Match Amount of Installed Memory weedan_ash CPUs, Motherboards & RAM 3 13th Jan 2009 17:18
Bus speeds polakstanek CPUs, Motherboards & RAM 10 11th Oct 2008 16:13
FSB speeds robina80 CPUs, Motherboards & RAM 2 1st Dec 2007 11:38
Bus Speed Match Blazing933 CPUs, Motherboards & RAM 1 21st Oct 2007 16:23
Ram speeds xactly CPUs, Motherboards & RAM 3 2nd Sep 2007 17:26
Thread Tools




Arabic Bulgarian Chinese (Simplified) Chinese (Traditional) Croatian Czech Danish Dutch English Finnish French German Greek Hebrew Hungarian Italian Japanese Korean Latvian Lithuanian Norwegian Polish Portuguese Romanian Russian Serbian Slovak Spanish Swedish Thai Turkish Ukrainian

Copyright ©2006 - 2009 Computer Juice.

Powered by vBulletin® Copyright ©2000 - 2009 Jelsoft Enterprises Ltd. SEO by vBSEO ©2009, Crawlability, Inc.