According to the tech specs, the new 15 and 17 have "512MB PC2-4200 DDR2 SDRAM (running at 333MHz)." Does this mean that the processor is now able to take advantage of DDR ram? Does the reference to "running at 333 mhz" mean that the data transfer rate of the front side bus has basically been doubled (167 x 2=334)?
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Will DDR2 ram improve performance of new PB?
- Thread starter lssmit02
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The G4 itself will never be directly connected to the RAM. The system controller may be improved but it's still a bit of a two lane road coming from a 10 lane freeway. The actual speed is 166 and 2/3 so, you can see why they label it 333.
I see no reason why switching RAM specifications would help, other than to use whatever RAM is in favour. It's all about giving the system controller better throughput to get and put data from/to that RAM.
I see no reason why switching RAM specifications would help, other than to use whatever RAM is in favour. It's all about giving the system controller better throughput to get and put data from/to that RAM.
V
VogonPoet
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Will this RAM work with the new 15" PBs?
Will this RAM work with the new 15" PBs?
Kingston 1GB 200 pin DDR2 SODIMM DDR2 533 (PC2 4200) Notebook Memory
Model #: KVR533D2S4/1G
http://www.newegg.com/Product/Product.asp?item=N82E16820144183
Will this RAM work with the new 15" PBs?
Kingston 1GB 200 pin DDR2 SODIMM DDR2 533 (PC2 4200) Notebook Memory
Model #: KVR533D2S4/1G
http://www.newegg.com/Product/Product.asp?item=N82E16820144183
I ordered this
I ordered a stick of OCZ ram based on the experience I had with them in my gaming rig I prefered to try them for my new powerbook.
http://www.newegg.com/Product/Product.asp?Item=N82E16820227110
I ordered a stick of OCZ ram based on the experience I had with them in my gaming rig I prefered to try them for my new powerbook.
http://www.newegg.com/Product/Product.asp?Item=N82E16820227110
bousozoku said:
Exactly right. The bottleneck is the FSB to the CPU, not the ram throughput. It will help battery life out because it runs on 1.5-1.6 volts instead of 2.6-2.8. DDR2 also has higher latencies than DDR1, so its possible in some cases you might see a slight drop in performance, as DDR2 at the same speeds as DDR1 is less than stellar.
The G4 can't even use the full bandwith of DDR, much less DDR2.
They changed the specification for supply reasons; DDR SO-DIMMs remain more expensive.
I will be surprised if there is anything but a marginal performance gain. Maybe even a performance decrease because DDR2 has higher latency.
Is there any upside to this? Sigh.
They changed the specification for supply reasons; DDR SO-DIMMs remain more expensive.
I will be surprised if there is anything but a marginal performance gain. Maybe even a performance decrease because DDR2 has higher latency.
Is there any upside to this? Sigh.
dferrara said:
At the higher latencys and same mhz, we will most likely see a performance decrease.
The ONLY advantages i can see is a slight improvement on power consumption, and higher margins for Apple because DDR2 SO-DIMMS are cheaper than their DDR counterparts.
*grumble*