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Intel Pentium III 1000 - RB80526PZ001256 (BX80526C1000256)

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Intel Pentium III 1BGHz (Socket 370) specifications

The specs can be used for short-term
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General information
TypeCPU / Microprocessor
Market segmentDesktop
Family
Intel Pentium III
Model number  ? 1BGHz
CPU part numbers
  • RB80526PZ001256 is an OEM/tray microprocessor
  • BX80526C1000256 is a boxed microprocessor
Frequency  ? 1000 MHz
Bus speed  ? 133 MHz
Clock multiplier  ? 7.5
Package370-pin Flip-Chip Pin Grid Array (FC-PGA)
1.95" x 1.95" (4.95 cm x 4.95 cm)
SocketSocket 370 / PGA370
Introduction dateMar 8, 2000
Price at introduction$990
S-spec numbers
Part number ES/QS processors Production processors
  QAN1 QAT7 QAZ1 QEJ0 QX93 SL4C8 SL4F9 SL4MF
BX80526C1000256     + +
RB80526PZ001256++++++ +
Unknown      + 
 
Part number Production processors
  SL4WM SL52R SL5B3 SL5DV SL5FQ
BX80526C1000256 ++++
RB80526PZ001256++ + 
Unknown     
Architecture / Microarchitecture
MicroarchitectureP6
Processor core  ? Coppermine
Core steppings  ? C0 (QAN1)
cC0 (QAT7, SL4C8, SL4MF, SL4WM)
cD0 (QAZ1, QEJ0, SL4F9, SL52R, SL5B3, SL5DV, SL5FQ)
CPUIDs686 (SL4C8, SL4MF, SL4WM)
68A (QAZ1, QEJ0, SL4F9, SL52R, SL5B3, SL5DV, SL5FQ)
Manufacturing process0.18 micron
28 million transistors
Die90mm2 (CPUID 0686h)
94.7mm2 (CPUID 068Ah)
Data width32 bit
Data bus width64 bit
The number of CPU cores1
The number of threads1
Floating Point UnitIntegrated
Level 1 cache size  ? 16 KB 4-way set associative instruction cache
16 KB 4-way set associative data cache
Level 2 cache size  ? Full-speed integrated 8-way set associative 256 KB
MultiprocessingUp to 2 processors
Extensions and Technologies
  • MMX instructions
  • SSE / Streaming SIMD Extensions
Low power features
  • AutoHALT state  ? 
  • Stop Grant state  ? 
  • Sleep state  ? 
  • Deep Sleep state  ? 
  • System Management Mode
Electrical / Thermal parameters
Min/Recommended/Max V core1.62V / 1.7V / 1.74V
1.67V / 1.75V / 1.79V
1.76V / 1.76V / 1.86V
Minimum/Maximum operating temperature  ? 0°C - 70°C (1.7V and 1.76V core)
75°C (1.75V core)
Maximum power dissipation  ? 32.98 Watt (1.7V core)
35.35 Watt (1.75V core)
Thermal Design Power  ? 29.6 Watt (1.76V)
26.1 Watt (CPUID 0686h)
29 Watt (CPUID 068Ah)
Notes on Intel Pentium III 1BGHz (Socket 370)
  • The processor is usually marked as 1000/256/133/1.7V, 1000/256/133/1.75V or 1000/256/133/1.76V, where the last number specifies processor's core voltage. If the processor is marked with RB80526PZ001256 part number then use processor specification number to identify processor's core voltage
  • This part is usually referred to as 1B GHz or 1.0B GHz CPU

Detailed side-by-side comparison

If you want to compare in detail the Intel 1BGHz (Socket 370) with any other processor from our CPU database please select desired processor using one of the following methods:

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Pentium III 1BGHz (Socket 370) Overclocking

Sorry, we do not have overclocking data for this processor at this time.

Intel 1BGHz (Socket 370) Benchmarks and Performance evaluation

Compare Intel 1BGHz (Socket 370) benchmark results with all tested CPUs from one of the following families:

You can also compare this model with other tested CPUs in our

For averaged performance in integer, floating-point, SIMD and memory-intensive applications please see the next section.


Integer, Floating-Point, SIMD and Memory performance

The graphs below show up to 10 microprocessors with approximately the same level of performance in integer (CPU), floating-point (FPU), SIMD and memory benchmarks. All processors were not overclocked, and were tested at a nominal frequency, with a stock heatsink and default BIOS settings. Click on the '?' mark next to each model name to see specifications of that model, and details of the test platform.

Benchmarked processor:

CPU ID:0686h
CPU vendor string:GenuineIntel

Integer performance

Model / Part number   Result  
AMD Duron 1GHz DHL1000AKT1B
119.8%  ? 
AMD Duron 1GHz DHD1000AMT1B
119.5%  ? 
AMD Athlon 900MHz A0900AMT3B
108.3%  ? 
AMD Duron 900MHz D900AUT1B
107.6%  ? 
AMD Athlon 850MHz A0850APT3B
102.4%  ? 
Intel Pentium III 1BGHz (Socket 370)
100%  ? 
Intel Pentium III 933MHz RB80526PZ933256
93.2%  ? 
AMD Athlon 750MHz A0750APT3B
90.2%  ? 
Intel Pentium III 866MHz RB80526PZ866256
86.5%  ? 
Intel Pentium III 800EB (Socket 370)
79.8%  ? 
AMD Athlon 650MHz AMD-K7650MTR51B C
77.6%  ? 

Floating Point performance

Model / Part number   Result  
AMD Duron 1GHz DHL1000AKT1B
117.5%  ? 
AMD Athlon 1GHz A1000AMT3B
116.9%  ? 
AMD Athlon 900MHz A0900AMT3B
105.2%  ? 
AMD Duron 900MHz D900AUT1B
104.6%  ? 
Intel Celeron 1.8GHz RK80531RC033128
100.3%  ? 
Intel Pentium III 1BGHz (Socket 370)
100%  ? 
AMD Athlon 850MHz A0850APT3B
99.4%  ? 
Intel Pentium III 933MHz RB80526PZ933256
93.2%  ? 
Intel Celeron 1.6GHz RK80532RC025128
88.3%  ? 
AMD Athlon 750MHz A0750APT3B
87.6%  ? 
Intel Pentium III 866MHz RB80526PZ866256
86.5%  ? 

MMX / SSE / SSE2 performance

Model / Part number   Result  
AMD Athlon 1.1GHz A1100AMS3B
115.2%  ? 
AMD Duron 1.1GHz DHD1100AMT1B
114.7%  ? 
AMD Athlon 1GHz A1000AMT3B
104.3%  ? 
AMD Duron 1GHz DHL1000AKT1B
104.2%  ? 
AMD Duron 1GHz DHD1000AMT1B
104.2%  ? 
Intel Pentium III 1BGHz (Socket 370)
100%  ? 
AMD Athlon 900MHz A0900AMT3B
93.9%  ? 
AMD Duron 900MHz D900AUT1B
93.8%  ? 
Intel Pentium III 933MHz RB80526PZ933256
93.2%  ? 
AMD Athlon 850MHz A0850APT3B
88.9%  ? 
Intel Pentium III 866MHz RB80526PZ866256
86.5%  ? 

CPU ID information for the Pentium III 1BGHz (Socket 370)

Detailed characteristics of processor's internals, including x86 instruction set extensions and individual instructions, high- and low-level technologies, are listed below. This list was acquired from an actual Intel Pentium III RB80526PZ001256 processor with the help of the x86 CPUID instruction. Any discrepancies between CPUID features and official specifications are likely due to some features being disabled in BIOS, or due to a bug in our CPUID decoding algorithm. Different steppings of Intel processors may also have slightly different features.

Our CPUID database contains 6 records for this microprocessor. See all submitted records.

Use our CPU identification tool to check features of your processor.

Submission details
Manufacturer:IntelMeasured frequency:1002 MHz
CPU Family:Pentium IIIComment:
Processor Number: 
Part number (supplied):BX80526C1000256Submitted by:TheRealZago
Part number (guessed):
RB80526PZ001256
Submitted on:
S-Spec Number:SL52RCWID version:0.5
General information
Vendor:GenuineIntel
Processor type:Original OEM Processor
CPUID signature:68A
Family: 6 (06h)
Model: 8 (08h)
Stepping:10 (0Ah)
TLB/Cache details:Data TLB: 4-KB Pages, 4-way set associative, 64 entries
Data TLB: 4-MB Pages, 4-way set associative, 8 entries
Instruction TLB: 4-KB Pages, 4-way set associative, 32 entries
Instruction TLB: 4-MB Pages, fully associative, 2 entries

Cache details
Cache: L1 data L1 instruction L2
Size: 16 KB 16 KB 256 KB
Associativity: 4-way set
associative		 4-way set
associative		 8-way set
associative
Line size: 32 bytes 32 bytes 32 bytes

Supported instructions
Instruction set extensionsAdditional instructions
MMX CMOV
SSE CMPXCHG8B
  FXSAVE/FXRSTORE
  SYSENTER/SYSEXIT

Integrated features and technologies
Major featuresOther features
On-chip Floating Point Unit 36-bit page-size extensions
  Advanced programmable interrupt controller
  Debugging extensions
  Machine check architecture
  Machine check exception
  Memory-type range registers
  Model-specific registers
  Page attribute table
  Page global extension
  Page-size extensions (4MB pages)
  Physical address extensions
  Processor serial number
  Time stamp counter
  Virtual 8086-mode enhancements

CPUs, related to Intel Pentium III 1BGHz (Socket 370)

The list of related CPUs does not include all models. For the complete list, please see the related "P6" processors for socket 370 page.

Model Frequency L2
cache		 Multi-
processing		 TDP Features  
Intel Pentium III (Coppermine) family, Socket 370
   Pentium III RB80526PZ733256 (733 MHz)733 MHz256 KB222.8W>
   Pentium III RB80526PY750256 (750 MHz)750 MHz256 KB223.2W>
   Pentium III 800EB (Socket 370)800 MHz256 KB224.5W>
   Pentium III RB80526PY800256 (800 MHz)800 MHz256 KB224.5W>
   Pentium III RB80526PY850256 (850 MHz)850 MHz256 KB225.7W>
   Pentium III RB80526PZ866256 (866 MHz)866 MHz256 KB226.1W>
   Pentium III RK80526PZ866256 (866 MHz)866 MHz256 KB229.5W>
   Pentium III RB80526PY900256 (900 MHz)900 MHz256 KB226.7W>
   Pentium III RB80526PZ933256 (933 MHz)933 MHz256 KB227.5W>
   Pentium III RK80526PZ933256 (933 MHz)933 MHz256 KB231.5W>
   Pentium III 1BGHz (Socket 370)1 GHz256 KB229.6W 
   Pentium III 1BGHz (Socket 370)1 GHz256 KB233.9W>
   Pentium III RB80526PY001256 (1 GHz)1 GHz256 KB229W>
   Pentium III RB80526PY005256 (1.1 GHz)1.1 GHz256 KB233W>
   Pentium III RK80526PZ006256 (1.13 GHz)1.13 GHz256 KB237.5W>
Intel Pentium III (Coppermine) family, P6 micro-architecture, Other sockets
   Pentium III 80526PZ933256 (933 MHz)933 MHz256 KB2 >
   Pentium III 1BGHz (Slot 1)1 GHz256 KB2 >
   Pentium III 80526PY1000256 (1 GHz)1 GHz256 KB2 >
Other families, P6 micro-architecture, Socket 370
   Celeron RK80530RY013256 (1.3 GHz)1.3 GHz256 KB  >
   Pentium III RK80530PZ014256 (1.33 GHz)1.33 GHz256 KB1 >
   Celeron RK80530RY017256 (1.4 GHz)1.4 GHz256 KB  >
   Pentium III RK80530PZ017256 (1.4 GHz)1.4 GHz256 KB1 >
   Pentium III 1.4GHz-S1.4 GHz512 KB2 >
   Celeron RK80530RY021256 (1.5 GHz)1.5 GHz256 KB  >
 • Within each category, the CPUs are sorted from slower (at the top) to faster (at the bottom)
 • Background color of specs and features indicate whether they are better or worse than similar spec/feature of the Pentium III 1BGHz (Socket 370)
 • Click on the >  icon to compare any CPU in the table with the Intel Pentium III 1BGHz (Socket 370) (Javascript required).

Pictures (12)

1000/256/133/1.7V

1000 MHz
133 MHz bus
370-pin flip-chip PGA		 Intel Pentium III 1000 - RB80526PZ001256 (BX80526C1000256)
1000/256/133/1.75

1000 MHz
133 MHz bus
370-pin flip-chip PGA		 Intel Pentium III 1000 - RB80526PZ001256 (BX80526C1000256)
Engineering sample

1000 MHz
133 MHz bus
370-pin flip-chip PGA

Engineering sample		 Intel Pentium III 1000 - RB80526PZ001256 (BX80526C1000256)
Diferent look
2006-05-09 13:06:58
Posted by: Andy

My CPU looks like this, is there any diference?
Response: Your CPU has 1.75V core voltage, higher maximum operating temperature and higher power dissipation than the pictured one.
 Diferent look
 
2010-06-02 03:53:03
Posted by: Fuynfactory

  		 
 
2010-06-02 03:58:07
Posted by: Fuynfactory

  		 
This is my CPU
2012-01-07 15:22:13
Posted by: Hegarth

This is my CPU 		This is my CPU
P3 1ghz
2013-02-13 23:26:18
Posted by: rizetki

cpuz 		P3 1ghz
 
2015-06-07 10:31:09
Posted by: Meft

  		 
SL52R
2015-06-07 10:32:19
Posted by: Meft

  		SL52R
 
2015-09-23 01:36:40
Posted by: Hyena

CPU-Z, SL52R 		 
SL5FQ
2015-10-16 13:27:47
Posted by: Oleksandr, Ukraine

Pentium III 1000/256/133/1.75V 		SL5FQ
Comments (8)

You're welcome to post suggestions, corrections, your own personal Intel Pentium III 1BGHz (Socket 370) review, or your experience with the microprocessor. Please do not ask upgrade and troubleshooting questions, and do not start discussions.

1312.5MHz on CopperMine core

2006-08-29 15:29:09
Posted by: Andy

Here is my Pentium III runing at 1.3GHz with homemade watercooling, the CPU stays in 30C, the bad part is that the onboard sound, vide, ethernet are not working at this FSB so I'm using a PCI sound, and network cards

1312.5MHz on CopperMine core

Upgrading this from Celeron

2007-02-11 17:07:08
Posted by: Joe Strong

I am planning to upgrade to the chip above(SL52R) from my Celeron 700MHZ. Its on a HP Pavilion XG823. Everything seems to match up can someone tell if this will work?

Upgrading this from Celeron

Response: Plase post upgrade questions in the forum.

Successful upgrade

2007-02-19 10:40:43
Posted by: Joe Strong

First of all I apologize for not posting in the forum.

The upgrade went successful from a Celeron 700Mhz to the above PIII chip. Of course it is recognized as 750Mhz because it's running at 100 FSB instead of 133. I could overclock but is this really wise when using the old heat sink and case fan?

Epic

2010-02-13 16:38:19
Posted by: Vitya

Top processor for s370 motherboards without tualatin support.
1,5x more faster than Celeron 950mhz/128 L2/100fsb.
10% slower than Celeron 1300/256/100 (tualatin)

Because for mpeg4 movies pentium-2 is not enough, but pentium-3 series still good after 10years as home computer for watch movies/music/internet same as pentium4 :)

For aesthetes p3-1000 is best choice.

For s370 with tualatin support better look at
Pentium III-S tualatin (server version 512L2) 1400/512/133.

GX110

2010-07-27 16:49:52
Posted by: maxfactor

I got 3 GX110 (desktop versions) and they all had 866 coppermines... I dug around at an old warehouse and found some of these will let yall know how they run later.

My favourite vintage CPU

2010-12-13 12:09:39
Posted by: Scribe

I bought a 1000/133/256/1,75 to "upgrade" my celeron-533 PC. It works great and runs XP Home SP2 with Avast 4.8 Pro quite good.
[u]Only problem[/u] : when I'm connected to the Internet,even if no web browser is opened, the Pentium runs at 100% !
My PC : Intel Pentium III @ 1000 Mhz
640 MB SDRAM PC-133
nVidia GeForce 256 SDR - 32 MB video memory
Seagate 10 GB HDD - 5400 rpm
Motherboard : ECS P6Bap-me (1999)

Dual cpu

2016-02-14 15:52:11
Posted by: Paul

I have a dual processor system with two of these. They're able to play 720p videos at full fps (without decoder on video card), and are good for all around tasks (internet etc).

Lucy is her name lol

2016-10-08 19:29:04
Posted by: DuRoi

My specs:


- PIII 1000 Mhz (1000/256/133/1.7V - SL4C8) with Slot 1 to Socket 370 asus adapter.
-Asus P3V4X mother-board (Bios 1006.­004 Latest) with Via 4in1 4.43v drivers installed.
- 2GB ram (4x512) PC133 133Mhz (timings 2.2.2.5).
- Asus Geforce MX400 V7100Pro 64Mg (AGP 4X). With "93.71_forceware_winxp2k_international_whql" Nvidia drivers.
- "Directx_Jun2010_redist" installed (Important).
- Sata II disk (160 Gb - 7200rpm - 8mg cache), with a sata to ide converter or adapter.
- Sound Blaster LIVE.

Love this machine (Lucy), once for a while i turn it on to play Wolfenstein 3D and Spear of Destiny.

NOT FOR SALE lol, museum piece.

Last modified: 25 Nov 2021
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