Intel Celeron 800: The first 100MHz FSB Celeron
by Anand Lal Shimpi on January 3, 2001 1:14 AM EST- Posted in
- CPUs
The Chip
The Celeron 800 remains unchanged from the previous Celeron processors. It is still manufactured by disabling half of the cache on low-yield Pentium IIIs that have bad cache blocks, thus giving the Celeron half the cache as well as making that cache half as associative as the Pentium III’s cache. This ends up hurting the Celeron severely as it, clock for clock, is unable to outperform the Pentium III, even when both are clocked at the same FSB/memory clock.
The explanation for this is simple, the less associative a processor’s cache is, the lower hit-rate it has, and the lower the hit rate, the more times the CPU has to go to main memory to fetch needed information. For more information on cache mapping techniques, check out our one page guide here.
Celeron 800 Specifications
· 0.18-micron Coppermine128 core
· 800MHz clock speed – 8.0x clock multiplier
· 32KB on-die L1 cache running at core speed
· 256-bit Advanced Transfer Cache – 4-way set associative 128KB on-die L2 cache running at core speed
· Advanced System Buffering
· 370-pin FC-PGA Socket-370 GTL+ CPU interface running at 66MHz
· 1.70v core voltage
CPU
Specification Comparison
|
||||||||
AMD Duron |
AMD
Athlon
|
Intel
Pentium III
|
Intel
Celeron
|
|||||
Core |
Spitfire
|
K7
|
K75
|
Thunderbird
|
Katmai
|
Coppermine
|
Mendocino
|
Coppermine128
|
Clock Speed |
600
- 800 MHz
|
500
- 700 MHz
|
750
- 1000 MHz
|
750
- 1200 MHz
|
450
- 600 MHz
|
500
- 1000 MHz
|
300
- 533 MHz
|
533
- 800MHz
|
L1 Cache |
128KB
|
32KB
|
||||||
L2 Cache |
64KB
|
512KB
|
256KB
|
512KB
|
256KB
|
128KB
|
||
L2 Cache speed |
core
clock
|
1/2
core
|
2/5
or 1/3 core
|
core
clock
|
1/2
core
|
core
clock
|
||
L2 Cache bus |
64-bit
|
256-bit
|
64-bit
|
256-bit
|
||||
System Bus |
100 MHz DDR (200 MHz effective) EV6
|
100
- 133 MHz GTL+
|
66/100
MHz GTL+
|
|||||
Interface |
Socket-A
|
Slot-A
|
Socket-A
Slot-A (OEM only up to 800MHz) |
Slot-1
|
Slot-1
Socket-370 |
Socket-370
|
||
Manufacturing Process |
0.18
micron
|
0.25
micron
|
0.18
micron
|
0.25
micron
|
0.18
micron
|
0.25
micron
|
0.18
micron
|
|
Die Size |
100mm^2
|
184
mm^2
|
102mm^2
|
120mm^2
|
128mm^2
|
106mm^2
|
153mm^2
|
106mm^2
|
Transistor Count |
25
million
|
22
million
|
37
million
|
9.5
million
|
28
million
|
19
million
|
28
million
|
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