Clawhammer v San Diego?

[Frills]

Wondering what the difference and which is better between the AMD 4000+ Clawhammer and San Diego cores.

Thanks in advance

 

[Brutal]

San Diego is the newer/better core.

Clawhammer :

The AMD64 core provides leading-edge 32-bit performance and support for future 64-bit applications
AMD64 technology provides full speed support for x86 code base for uncompromising 32-bit performance, with readiness for 64-bit applications
40-bit physical addresses, 48-bit virtual addresses
Eight new (sixteen total) 64-bit integer registers
Eight new (sixteen total) 128-bit SSE/SSE2 registers
Including support for 3DNow!™ Professional technology and SSE2


Enhanced Virus Protection for the upcoming Windows® XP SP2
Enhanced Virus Protection together with the upcoming Windows XP Service Pack 2 are designed to prevent the spread of certain viruses, like MSBlaster and Slammer; significantly reducing the cost and down-time associated with similar viruses and improving the protection of computers and personal information against certain PC viruses


A high-bandwidth, low-latency integrated DDR memory controller
Supports PC3200, PC2700, PC2100 or PC1600 DDR SDRAM
Unbuffered DIMMs
72-bit DDR SDRAM memory (64-bit interface + 8-bit ECC)
Up to 3.2 GB/s memory bandwidth
ECC protection enables increased system reliability


HyperTransport™ technology for high speed I/O communication
One 16-bit link up to 2000MHz
Up to 6.4GB/s HyperTransport™ I/O bandwidth
Up to 9.6GB/s total delivered processor-to-system bandwidth


Large high performance on-chip cache
64KB Level 1 instruction cache
64KB Level 1 data cache
Up to 1MB Level 2 cache
Improved branch prediction for greater accuracy in anticipating instruction calls
Enhanced TLB structures for better memory management of complex workloads

Core: ClawHammer
Operating Frequency: 2.4GHz
FSB: Integrated into Chip
Cache: Leval 1 64KB+64KB; Level 2 1MB
Voltage: 1.510V (SanDiego runs @1.4v)
Process: 130nm
Socket: Socket 939
Multimedia Instruction: MMX(+), 3DNOW!(+), SSE, SSE2, x86-64
with Heatsink and Fan


SanDiego:

The AMD64 core provides leading-edge 32-bit performance and support for future 64-bit applications
AMD64 technology provides full-speed support for x86 code base for uncompromising 32-bit performance, ready for 64-bit applications
40-bit physical addresses, 48-bit virtual addresses
Eight new (sixteen total) 64-bit integer registers
Eight (sixteen total) 128-bit SSE/SSE2/SSE3 registers
Including support for 3DNow!™ Professional technology and SSE3


A high-bandwidth, low-latency integrated DDR memory controller
Supports PC3200, PC2700, PC2100 or PC1600 DDR SDRAM
Unbuffered DIMMs
72-bit DDR SDRAM memory (64-bit interface + 8-bit ECC)
Up to 6.4 GB/s memory bandwidth
ECC protection enables increased system reliability


HyperTransport™ technology for high speed I/O communication
One 16-bit link up to 2000MHz
Up to 8 GB/s HyperTransport™ I/O bandwidth
Up to 14.4 GB/s total delivered processor-to-system bandwidth


Large high performance on-chip cache
64KB Level 1 instruction cache
64KB Level 1 data cache
Up to 1MB Level 2 cache
Improved branch prediction for greater accuracy in anticipating instruction calls
Enhanced TLB structures for better memory management of complex workloads
Core: San Diego
Operating Frequency: 2.4GHz
Cache: 1MB Level 2 Cache
Process: 90nm
Socket: Socket 939


http://forums.amd.com/lofiversion/index.php/t64040.html

 

[fishmahn]

Short version:

Clawhammer: 130nm
San Diego: 90nm

San Diego has an improved memory controller & I think SSE3 is also new. It overclocks a bit better and runs a bit cooler.

Mike.