Question:
800Mhz (Bus) Processor + 667Mhz RAM = 667Mhz Total Processing Speed?
I'm wondering if a computer with a 2.0GHz/800Mhz FSB processor will run just as fast as a computer with a 2.0GHz/667Mhz FSB processor because the RAM's speed is 667Mhz in both.
Is it true?
Answer:
Re: 800Mhz (Bus) Processor + 667Mhz RAM = 667Mhz Total Processing Speed?
Nope.
RAM will be the bottle neck but if RAM is run in Dual channel the increase in bandwidth should be close to what the CPU can use.
Answer:
Re: 800Mhz (Bus) Processor + 667Mhz RAM = 667Mhz Total Processing Speed?
Even 667mhz ram without dual channel wont bottleneck the FSB.
667mhz DDR2 has a higher bandwidth then a 800mhz FSB. Plus there is more being send on the FSB then just Ram read and writes.
Answer:
Re: 800Mhz (Bus) Processor + 667Mhz RAM = 667Mhz Total Processing Speed?
Thanks! You guys are awesome.
Answer:
Re: 800Mhz (Bus) Processor + 667Mhz RAM = 667Mhz Total Processing Speed?
Even 667mhz ram without dual channel wont bottleneck the FSB.
667mhz DDR2 has a higher bandwidth then a 800mhz FSB. Plus there is more being send on the FSB then just Ram read and writes.
I don't see how, a 800FSB CPU has ~6.4gigs of bandwidth in theory. 667DDR2 has 5.4gigs.
Answer:
Re: 800Mhz (Bus) Processor + 667Mhz RAM = 667Mhz Total Processing Speed?
I don't see how, a 800FSB CPU has ~6.4gigs of bandwidth in theory. 667DDR2 has 5.4gigs.
So the intel systems of today are only about 8 years behind the DEC alpha? They're closing the gap! :D Too bad hp decided to buy Compaq and kill the alpha line. :mad:
* The DP264 (and DS20) from 1998/1999 had 5.2 GB/s of memory bandwidth in dual-channel mode.
Answer:
Re: 800Mhz (Bus) Processor + 667Mhz RAM = 667Mhz Total Processing Speed?
So the intel systems of today are only about 8 years behind the DEC alpha? They're closing the gap! :D Too bad hp decided to buy Compaq and kill the alpha line. :mad:
* The DP264 (and DS20) from 1998/1999 had 5.2 GB/s of memory bandwidth in dual-channel mode.
Well 8 years ago that was considered a super computer. Technology has come a long way. A desktop was what? A P2-300 64megs and 6-10gig HDD? That was the screamer for a desktop. My iPod and cell phone has more power than that computer now.
Answer:
Re: 800Mhz (Bus) Processor + 667Mhz RAM = 667Mhz Total Processing Speed?
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Well 8 years ago that was considered a super computer. Technology has come a long way. A desktop was what? A P2-300 64megs and 6-10gig HDD?
No, that was not considered a super-computer. The DP264 and DS20 were desktop computers with one hard drive and a CDROM. (see attached photo). It was a large desktop case, like some of the enthusiast tower cases today, but a desktop none the less. Also, it could take 4GB of memory (and actually use all 4 ;) )
The super-computer models were the GS60/140, replaced by the GS80/160/320 line. Those were large refrigerator-sized machines. Internal code-name for those was 'Wildfire'. They had memory bandwidth exceeding 60 GB/s. :eek:
Between the DS and GS line was the ES. ES40/45 came in two configurations, desk-side for a BIG workstation, or rack-mount as a server. ES45 internal codename was 'Privateer'.
I should know, I used to work for Compaq servicing their Alpha product line. ;)
For many years, the Alpha processor was so far ahead of intel processors, it was just silly. Don't forget that all Alphas, from the very first one ever made in 1992, through the current models, are all 100% 64-bit running a 100% 64-bit OS. I guess they're still ahead of intel in some ways. ;)
Answer:
Re: 800Mhz (Bus) Processor + 667Mhz RAM = 667Mhz Total Processing Speed?
Here's some specs from the last model of GS class super-computer:
CPU: 2 to 64 Alpha processors; EV7z ( EV7 @ 1.3 GHz) and EV7 1.15 GHz
Cache: 1.75 MB ECC on-chip L2 cache, 7-way set associative
Memory: Up to 512 GB (8 GB/processor); RAID memory optional
I/O Expansion: Up to 512 PCI-X slots, 192 PCI slots, 64 AGP 4X slots
I/O Bandwidth: Up to 222 GB/s I/O bandwidth
(from here: http://h18002.www1.hp.com/alphaserver/gs1280/ )
Answer:
Re: 800Mhz (Bus) Processor + 667Mhz RAM = 667Mhz Total Processing Speed?
No, that was not considered a super-computer. The DP264 and DS20 were desktop computers with one hard drive and a CDROM. (see attached photo). It was a large desktop case, like some of the enthusiast tower cases today, but a desktop none the less. Also, it could take 4GB of memory (and actually use all 4 ;) )
The super-computer models were the GS60/140, replaced by the GS80/160/320 line. Those were large refrigerator-sized machines. Internal code-name for those was 'Wildfire'. They had memory bandwidth exceeding 60 GB/s. :eek:
Between the DS and GS line was the ES. ES40/45 came in two configurations, desk-side for a BIG workstation, or rack-mount as a server. ES45 internal codename was 'Privateer'.
I should know, I used to work for Compaq servicing their Alpha product line. ;)
For many years, the Alpha processor was so far ahead of intel processors, it was just silly. Don't forget that all Alphas, from the very first one ever made in 1992, through the current models, are all 100% 64-bit running a 100% 64-bit OS. I guess they're still ahead of intel in some ways. ;)
Shows how much I know. What was the price tag on those? Weren't they used in research only?
Back in 98 I was 10 years old and I only knew how to use word and tinker in with Regedit now I'm an admin at a law firm. How times have changed indeed.
In my opinion Intel's weakest link is always in it's memory access. The bus in the P3 trails all the way to the PPro doesn't scale well. The P4's inital design was smart but it came from RAMBUS(problems of it's own) and had HUGE latency. AMD's EV6 bus licensed from Alpha was a huge step forward. Even now with the C2D Intel relies heavily on it's L2 Cache and prefetch to make up for it's huge latency and lack of bandwidth compared to AMD.