Pre-Release PowerMac/XServe Replacement CPU Benchmarks?

[AidenShaw]

The woodcrest 1333 chipset is not truely 1333. it's a dual 667. the 2 cpu's, which is what woodcrest is meant for, will both have their own 667 bus, so no sharing, but not high speed either. it's that way for reliability

The Intel 5000 chipset (for Xeon 5100 CPUs) front side bus is a pair of 1066 MT/s or a pair of 1333 MT/s, not two at 667 MT/s.

If the bus is double pumped, the frequency of the bus clock is half the frequency of the data. If quad pumped, the bus clock is 1/4 of the data frequency. Data frequency is almost always used in the spec sheets, not the bus clock frequency. For the Intel 5000, the FSB clock is 266 MHz (1066 MT/s) or 333 MHz (1333 MT/s) - the multiplier is 4, making it a quad-pumped bus.

http://download.intel.com/design/chipsets/datashts/31307101.pdf

The MCH supports 1066 MHz FSB which is a quad-pumped bus running off a 266 MHz system clock, and a point to point DIB processor system bus interface. Each processor FSB supports peak address generation rates of 533 Million Addresses/second.

Both FSB data buses are quad pumped 64-bits which allows peak bandwidths of 8.5 GB/s (1066 MT/s). The MCH supports 36-bit host addressing, decoding up to 64 GB of the processor’s memory address space.

The term DIB means Dual Independent Bus, referring to a separate FSB per socket.

Each socket has its own FSB to the Northbridge, similar to the structure of the G5.

Figure 1.1 on page 23 from: http://download.intel.com/design/chipsets/datashts/31307101.pdf

 

[dante@sisna.com]

3.0ghz Conroe = 3.6ghz G5 when you add the 20% advantage. plus the shared L2 , now do u still think this is a down grade. you really think that Quadstill looks so good now.

Okay, I read the report, and I'll say it again: YES that dual Conroe IS a downgrade over the current Quad when using highly processor intensive applications combined with a multitasking (ie 10 or more app's open) environment. The current Quad, especially under Leopard, will easily outproduce this Dual Conroe.

DJO

 

[trekbody]

Woodcrest is not nor will it ever see daylight in a power mac/Mac Pro. Conroe will do just fine and from most benchmarks it out performs the Athlon X2 by atleast 20% clock 4 clock. Hate to break It to you but the dual socket days are over for Desktop macs. You really think apple is gonna put is gonna put 2 $80 cpu's in a prosumer machine....not. maybe in an Xserve but not a mac pro. here's how it will break down. iMac will use Merom as it is already pin compatible with the current Core duo mobile chips. no need to change the motherboard.

MacMini / Core Duo 1.86-2.0 2MB L2

Macbook / Core Duo 2.16-2.33 2MB L2

iMac / Core 2 Duo(merom) 2.16-2.33 4MB L2

Macbook Pro / Core 2 Duo(merom) 2.1-2.33 4MB L2

Mac Pro / Core 2 Duo(Conroe) 2.4-2.67 and 2.93 XE 4MB L2

Dude, you've got to be feeling sheepish today. This posting became a joke yesterday.