Linked by Thom Holwerda on Sat 3rd Jun 2006 16:12 UTC, submitted by anonymous
Morphos In a comment on the Power.org blog, Pieter Van den Abeele wrote that Genesi will be releasing the Open Server Workstation, which will be based on the PowerPC 970 (G5) chip. The system is scheduled for release this month give or take a few weeks, and will cost $1599. Developers can also register for a free workstation.
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RE[4]: g5
by encia on Mon 5th Jun 2006 10:36 UTC in reply to "RE[3]: g5"
encia
Member since:
2005-11-16

>the PowerPC 970MP is arguably a more capable >processor than the Opteron

Depends on the application e.g. Cinebench X64 vs Cinebench MacOS X.

>gives you twice as many GPRs

Opteron delivers larger L1 cache.

>consumes less power,

One shouldn’t compare IBM’s "Typical" TDP to AMD’s max power TDP. Also factor in "Opteron HE".

Reply Parent Score: 1

RE[5]: g5
by Simba on Mon 5th Jun 2006 14:56 in reply to "RE[4]: g5"
Simba Member since:
2005-10-08

> Opteron delivers larger L1 cache.

Which is partly to compensate for the fact that the CPU itself doesn 't have enough GPRs.

Reply Parent Score: 1

RE[6]: g5
by encia on Tue 6th Jun 2006 08:26 in reply to "RE[5]: g5"
encia Member since:
2005-11-16

>Which is partly to compensate for the fact that the >CPU itself doesn 't have enough GPRs.

Look up the purpose of "register renaming" hardware tricks in relation ISA limited GPRs.

Reply Parent Score: 1

RE[6]: g5
by encia on Tue 6th Jun 2006 08:40 in reply to "RE[5]: g5"
encia Member since:
2005-11-16

>Which is partly to compensate for the fact that the >CPU itself doesn 't have enough GPRs.

Modern x86 CPUs use more than eight/sixteen GPR internally, that allows them to use several versions of the same GPR. This is called register renaming.

Specfic for K8...
Not visible for the software programmer are eight more 64 bit scratch registers used to store intermediate results for micro code routines.

According to chip-architect.com, Opteron may have upto 96 "renamed registers".

Reply Parent Score: 1

RE[5]: g5
by Simba on Mon 5th Jun 2006 15:36 in reply to "RE[4]: g5"
Simba Member since:
2005-10-08

Oh yeah. PowerPC 64 bit also supports up to 16 Gb of memory. Opteron only supports 8.

Reply Parent Score: 1

RE[6]: g5
by Wes Felter on Mon 5th Jun 2006 16:06 in reply to "RE[5]: g5"
Wes Felter Member since:
2005-11-15

A two-socket Opteron system should easily take 16 or even 32 GB of RAM.

Reply Parent Score: 1