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is this why all ram perform similarly ?
drbaltazar
Member UncommonPosts: 7,856
in Hardware
OK I was rereading ram article and my mind felt I was misunderstanding something,so i checked pcie MSI (message signal interrupt),you know bored!then it hit me while rereading MSI definition,MSI and pcie play a huge role for ram.
Want to know what the issue is?look at pcie (speed etc)then look a message signal interrupt (and its extended variant if it apply)MSI use pcie to mention ram intent,I suspect in some circumstance either pcie cant keep up ,or MSI can't keep or both(because the os is preventing it or there aren't enough interrupt (recommended by ms for normal home desktop is 1 per core ,but they set it at 1 per socket,why?easier on programmer at amd nvidia and all other pc part maker.if they had to set 1 interrupt per CPU core ,imagine and,they have 1 ,2,3,4,6,8 core variant!yep its just less costly.so your ram not affected by speed mean something between CPU and ram (or GPU)is preventing it,since I know CPU GPU and ram can all keep up together only one part might not be able to ,the link between.either the pcie or MSI (I think its a combination,like the priority of pcie and MSI are in conflict and cause the slowdown
Want to know what the issue is?look at pcie (speed etc)then look a message signal interrupt (and its extended variant if it apply)MSI use pcie to mention ram intent,I suspect in some circumstance either pcie cant keep up ,or MSI can't keep or both(because the os is preventing it or there aren't enough interrupt (recommended by ms for normal home desktop is 1 per core ,but they set it at 1 per socket,why?easier on programmer at amd nvidia and all other pc part maker.if they had to set 1 interrupt per CPU core ,imagine and,they have 1 ,2,3,4,6,8 core variant!yep its just less costly.so your ram not affected by speed mean something between CPU and ram (or GPU)is preventing it,since I know CPU GPU and ram can all keep up together only one part might not be able to ,the link between.either the pcie or MSI (I think its a combination,like the priority of pcie and MSI are in conflict and cause the slowdown
Comments
RAM gives off the illusion of similiar performance. it's not that all RAM is the same, it's that RAM is never a bottleneck in your system because you can buy truck loads for pennies on the dollar. Your system is always held back by a poor:
GPU>CPU>Power Supply>Internet Speed>SSD>Cooling System>Motherboard>OS>User>Mouse>Keyboard>Monitor>Mouse Pad>Desk>Cabling>Aesthetic Case...............GIANT GAP HERE>RAM
In that order
It's more that RAM is now generally fast enough never to cause a problem in practice. The only applications that are really affected by memory speeds are memory benchmarks.
One exception is with AMD's APUs. The integrated GPU is connected to system memory (as it has no dedicated memory), and the GPU is powerful enough that it can be held back by slower memory, so you see performance increases in games with higher memory speeds.
Scott Mueller's Upgrading and Repairing PCs. Any recent edition is a great reference source for learning how a computer works. Find a used copy in a used book store if needed. You can probably get a copy in french.
http://www.quepublishing.com/imprint/series_detail.aspx?st=87406
Just don't get his Upgrading and Repairing Laptop PC edition. It is literally the PC version with the words 'portable computer' or 'laptop' copy and pasted wherever the other edition refers to a computer.
I am not sure what you are up to there...
Signaling is handled via dedicated interrupt line (PCI - 4 interrupts per device) or there is used I/O mapped memory(MSI) used by ie. PCIe.
The limit on interrupts using MSI is iirc 32. The difference in number of interrupts has no bearing on performance. Although, MSI should be sligtly faster and easier to work with since it bypass all the hassle with DMA write.
I think I found out why ,in this paper they mention the drawback of msi msix ,LATENCY.oh well,golfing ,maybe I should quit gaming and begin golfing
What about games like rts's. Something like Sins of a Solar Empire huge maps. How is GPU more important than CPU. It depends on what a person intends to do with a system. Having to choose I will personally take a bigger CPU over GPU because of the types of games I like.Just like some people here have said.
Ram is not usually a bottleneck in a system. For example my Phenom 2 x6 is perfect for DDR3 1600 7-7-7. Same with intel quad cores.
Now Intel 6 core and OC AMD 8 cores are a bit bottlenecked by 1600 and could really use some fast DDR3-1866.
AMD APU's need DDR3 2200-2400 for top performance.
It's pretty easy to make memory into a bottleneck if you're so inclined. Just get a Windows 7 or later system with only 1 GB of system memory.
But ultimately, once something is fast enough that it's not a meaningful bottleneck, making that component faster yet doesn't gain you anything.
Windows 8 isn't the server-oriented OS, that's Server 2012.