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November 29th, 2005, 11:35 PM
#1
Is DDR RAM a bottleneck?
I've recently been reading about computer hardware like RAM, the CPU, and the FSB. The book I have says that the FSB is a big bottleneck between RAM and the CPU, but with the current AMD processors having a 1000mhz FSB and PC3200 (400mhz) RAM is the fastest available, how is this the case? Also, won't dual-core processors like the AMD x-2 have huge problems with the FSB being a bottleneck, as they have 2x the processing power but the same FSB width? Thanks for the help,
Jared
It is better to die on your feet than to live on your knees.
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November 30th, 2005, 01:27 AM
#2
Hi Jareds FSB = Front Serial BUS, that is the motherboard, The processor is generally much faster as is the RAM. Actually there is RAM faster than 400Mhz
At the moment the MoBo is the bottleneck, BUT please remember that the actual speed of the peripherals also counts, like PCI = 33Mhz, AGP = 66Mhz etc.
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November 30th, 2005, 03:21 AM
#3
Nihil,
I just looked on newegg.com, pricewatch.com, and bestbuy.com, and the fastest available RAM was DDR2 PC-6400, which runs at 800mhz. Please explain how the 1000mhz FSB is the bottleneck if it's faster than all (readily) available RAM.
It is better to die on your feet than to live on your knees.
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November 30th, 2005, 03:44 AM
#4
I'm not really sure how to answer your main question, but I needed to clear something up. AMD X2's are NOT 2x faster than a regular version of that processor at the same speed. It's dual core, which doesn't actually make it 2x faster.
[H]ard|OCP <--Best hardware/gaming news out there--|
pwned.nl <--Gamers will love this one --|
Light a man a fire and you\'ll keep him warm for a day, Light a man ON fire and you\'ll keep him warm the rest of his life.
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November 30th, 2005, 03:54 AM
#5
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November 30th, 2005, 04:14 AM
#6
That last line is a bit off. If you have certain dual core systems, it doesn't matter what support the OS has for it, the splitting of the load is at the hardware level.
[H]ard|OCP <--Best hardware/gaming news out there--|
pwned.nl <--Gamers will love this one --|
Light a man a fire and you\'ll keep him warm for a day, Light a man ON fire and you\'ll keep him warm the rest of his life.
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November 30th, 2005, 04:19 AM
#7
Hi The Grunt
Yes, I was actually thinking more in terms of applications than operating systems.
EDIT: Incidentally, it is nice to have a theoretical discussion in "Hardware", makes a change from the usual "doom and gloom"?
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November 30th, 2005, 11:58 AM
#8
Originally posted here by nihil
Hi Jareds FSB = Front Serial BUS,
Ehhmm.. It's Front Side Bus.
http://www.computerhope.com/jargon/f/fsb.htm
It's the bus the processor uses to communicate with the rest of the hardware, IO and memory.
And yes, it's THE bottleneck (there are a few others like the PCI bus). This FSB bottleneck is the reason why there's first and second level cache on your processor.
Please explain how the 1000mhz FSB is the bottleneck if it's faster than all (readily) available RAM.
Because the processor runs 2-3 times faster then the fastest RAM available. They can make the actual RAM chips as fast as the processor (the cache in modern processors runs at the same speed as the processor) but the problem is in the connection between the processor and the memory.
This has to do with physics.. Electricity travels at about half the speed of light. With these extremely high frequenties, electrons can't travel fast enough to cope with the physical distance involved.
Oliver's Law:
Experience is something you don't get until just after you need it.
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