Re: Short Vectors Versus Long Vectors

On Wed, 24 Apr 2024 22:29:36 -0000 (UTC)
Lawrence D'Oliveiro <ldo@nz.invalid> wrote:

On Wed, 24 Apr 2024 09:18:56 GMT, Anton Ertl wrote:
 

But the Cray-1 is not an improvement on the Model 195. 

 
The Cray-1 was widely regarded as the fastest computer in the world,
when it came out. Cruising speed of something over 80 megaflops,
hitting bursts of about 120.
 
IBM did try to compete in the “supercomputer” field for a while
longer, but I think by about ten years later, it had given up.

In late 80s IBM joined forces with "attack of killing micros".
Their first POWER CPU was released in 1990 and did 82 MFLOPS (peak).

A single processor of contemporary Cray Y-MP was 4 times faster.
A single processor of older Cray-2 was almost 6 times faster, but by
1990 it was discontinued.
Wikipedia says that power consumption of Cray-2 was 150–200 kW,
probably for 4 processors with 2 GB of memory and peripherals.
I can't find data about power consumption of IBM Power processor. My
guess would be ~40 W for CPU and 1000-1500 W for a whole RS/6000
Model 550 with 1 GB of memory.

BTW, in the latest Top500 list you ca see IBM at #7 spot.
Things that carry name of Cray listed at #2 and #5. They are,
respectively, Intel Inside and AMD Inside.