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Asher
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Calgary, Alberta
Nov 1999
time: 22:29
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quote:
Originally posted by panag
look at the future , its G5 now , .... 
link , so you dont know apples site , .... 
allas at your special request >>> www.apple.com |
The G5 has zero L3 cache, according to Apple! How long are you going to play this game?
quote:
and you are sure about your calculations , ..... no way they are going to beat 999mb , ..... so one of the two is wrong , and huh , under what OS , ....
have a nice day |
Huh?? Even the 32-bit Windows allows 2GB RAM/2GB virtual per process. 
panag, you seriously don't have a clue what you're talking about. Stop trying.
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panag
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MY WORDS ARE BACKED WITH BIO-CHEMICAL WEAPONS
Oct 2000
time: 07:29
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quote:
Originally posted by Asher
panag, since you apparently can't even figure out how to click links, I took the liberty of taking a screenshot and highlighting the important part:
Wiglaf: 
Apple's been behind in that department, too. Intel's been on 512KB for the desktop chips for a LONG time, and a month after the G5 comes out, both AMD and Intel are using 1024KB L2 cache.  |
hi ,
but who is talking about the level , you are , .....
the difference still is eight to six , read the post again , nowhere did i start to speak about L2 or L3 or L25 or L99 for that matter , ....
have a great one
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Wraith
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Austin, Texas, USA
Aug 1999
time: 23:29
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Define fastest, Asher. IBM just put out scores for one of their 32 core Power4 machines beat the 64 processor Itanium II.
It's all going to come down to what you're trying to do, what code you've already got, and what resources you have to spend on new code.
--" I fail to see any serious competition beside AMD's Opteron."
Different markets. Opteron is going to do a lot to keep the Itanium out of the workstation space, but they're mostly targeted for different areas of the server market.
Although IBMs cluster-focused rack-mount Opteron server might help push it up there.
--" but the Opteron can only work in systems with up to 8 CPU"
Oh, Asher, you know better than that. It can work in up to 8-way configurations without extra glue logic. Your precious Itanium needs the extra glue logic if you want to do more than one processor at a time. There are already 32-way Opteron servers announced, and they are going to scale far better than the Xeon line (and even the Itaniums).
--"they're small-time Texas companies). "
Like IBM, you mean?
--"Opteron also can only address 16GB of data"
You're wrong about that one, actually. There's a difference between what the Opteron can address and what current memory modules can provide on current motherboards. The CPU itself can address 4.5TB of physical memory.
--"Asher, no one uses computers for Photoshop, or at least no one needs excessive speed for it."
Well, I don't use Photoshop, but I'd never pass up more CPU power to put behind the batch image editing processes I do run with The Gimp...
Wraith
I'm really quite pleasant until I'm awake
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Asher
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Calgary, Alberta
Nov 1999
time: 22:29
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quote:
Originally posted by panag
hi ,
might all be well , but when is that in the store , ..... when , ......
as long as it aint commercially of the shelf it does no-one good , .....
it has to be build in a comp with an OS , .....
and by the time it does , there shall be a new mac comp aswell , ......
have a nice day |
People don't buy these babies on the shelves. They're for professionals, G5s are for inept Mac users.
It's like going to a used car lot, you're not likely to find a Ferrari F50 there, but you'll find lots of Oldsmobile Delta 88s. 
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panag
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MY WORDS ARE BACKED WITH BIO-CHEMICAL WEAPONS
Oct 2000
time: 07:29
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quote:
Originally posted by Asher
What the hell is this supposed to mean? 
If that was true, Apple would have zero customers right now. |
hi ,
but aint that what you say what you hope for , .....
 , that aint funny , .....
btw , its a typo , there should have been a " T " , as in canT wait inbetween turns , ......
but its a good joke , .....
allas , see ya next time
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Asher
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Calgary, Alberta
Nov 1999
time: 22:29
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quote:
Originally posted by monolith94
Could you explain to me what L3 cache is, btw? |
Sure.
The CPUs these days work by fetching data from memory, then working on them.
By far, the fastest (instantaneous) access is in system registers. There's a limited number of these on each chip, the data is moved from memory (RAM, HD) into these registers and operated on, and the result is stored in another register.
But chips have things called a cache that usually sits on the CPU, or really close to it, to put stuff it uses a lot. The idea is by moving things much closer to the chip, with much more bandwidth, it can get it far faster (hundreds of thousands times faster, even).
There are up to 3 levels of cache usually: L1, L2, and L3.
L1 is Level 1, it's very very very fast, but also very small (32KB or so).
L2 is Level 2, it's very very fast, but moderately small (512KB is the norm today, PCs are moving to 1024KB in September)
L3 is Level 3, and is almost always found only in servers. Apple kinda cheated, they put regular DDR SDRAM near the chip and called it L3. While technically correct, it's not very fast. Chips like the Itanium II have this L3 cache physically built into the chip, and it's far faster.
If the data the CPU is looking for isn't in the L1, L2, or L3 caches, it goes to the RAM. There's a HUGE delay pentalty to do this.
And if it's not in the RAM, it tries the virtual memory on the harddrive. Literally millions of times slower than a cache.
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