Is it worth upgrading from a Q9550 to a i7 920?

[grap]

well .....

i have some idea to think
i m in summer holidays

do you know the tools and the spy/graphism to use for searching and see where is the bottleneck in our system ?

The acces time to read data on the disk or the ssd is too low and the system need to wait when it loads data from disk/sata2/ICH10/X58 chipset
it s look like the main trouble but ....

today, i search information on i7 and x58 chipset.
i m not sure of my result but i find this.

x58 use DMI 2 GB/s bidirectionnal with south/sata2 etc
sata2 is 300MB/sc so even 4Xssd raid 0 wont jam.
i try 4 ssd ocz core raid 0 and maxi was around 600 MB/s reading
reading burst acces a little more but short time, near 1000 MB/s so 1 GB/s

x58 use 36 lane PCIe v2.0
graphic card is connect on 16 line PCIe 2.0 so it s 8 GB/s

x58 use QPI with i7 920
4.8T/s so it s 9.6 GB/s unidirectionnel or 19.2 GB/s bidirectionnel
huge QPI 25.6 GB/s is for the i7 extem

http://en.wikipedia.org/wiki/Intel_X58

The total bandwidth of the two QPI ports is 25.6GT/s (which means, that taking away CRC bits and commands overhead, the data bandwidth may be more than 22GB/s). Single port max. productivity depends on the processor used - 4.8 or 6.4 with existing Core i7 and up to 12.8GT/s with 8-core future processors (though x58 manual states than on some operations x58 may work at up to 12.8GT/s even with the existing processors)

The X58 has two QPIs and can directly connect to two processors on a multi-socket motherboard or form a ring-like connection (1st processor - x58 - x58 - 2nd processor - 1st processor). When used with the Intel Core i7, the second QPI is usually unused (though, in principle, the second x58 might be daisy-chained on the board).

but only one QPI is connect, not the two ....


i7 use 3X RAM memory lines
our is pc3-ddr3-1600 so 48GB/s
initial was 8.5 GB/s so 21.5GB/s but lower speed

graphic card internal RAM speed of ATI4870 is 115 GB/s and Nvidia 159 GB/s for 285
so it can do the 8 GB/s of his pcie 16 in full work
Our GPU is 100percent with 5 wow

it means few times ... the CG 8 GB/s + ssd raid 0 + little other > QPI 9.6 GB/s
i m wrong ???
so if you plug 2 graphic cards .... 2X8 GB/s + disk + little other >> QPI 9.6 GB/s
1 graphic card can wait ? even with sli/cf bridge ?
i m wrong ???

in my PC, my ssd raid are plug on adaptec card 2405 PCIe 8X
i didnt check PCIe V1.0 with 1 GB/s or PCIe v2.0 with 2 GB/s.
if all is full load .... i m very near the QPI maxi


nb sorry for my english

[Sam DeathWalker]

i try 4 ssd ocz core raid 0 and maxi was around 600 MB/s reading

And thats your bottleneck.

Thats why I recomend this 32G system ram system (DDR2):

Wow folder in System Ram for $800


From what I read two video cards are more trouble then they are worth but as you say on X58 system once the data is in system ram you are good to go.

[grap]

yes but it s difficult to find ddr3 whith high capacity, usually it s 2 Go RAM or i need to change all

For memory card, you have some program to check the capacity in real time ?
i m curious to see in my computer what is the CG ram load for each wow in dalaran city.
maybe 2 GO ram in the CG will be enought ? and cancel all small lags there .....

[Sam DeathWalker]

Task manager will tell you that (look for wow.exe) ... I see 250M in EPL, per instance of wow. Look under "processes", not in real time but ....

Ya 4G DDR3 is to hard to find, and expensive. Thats why I suggest the DDR2 board (but its not I7).

[grap]

ok, thank s a lot

i didnt find on ressource monitor of w7 task manager but i havent the wow pc with me for few weeks, i ll search when i ll come back home.
i read my old screen and i see something strange in the reading disk.




first wow is main 1900X1200, other are 4 clones 1024X768 and all same around 525 Mo ram
C is velociraptor, D is old data samsung and F raid ssd ... in full work
You can see, except the main with reading 59 MB/min, each clone is half of half reading. 3.4 MB/min 2.5 MB/min 1 etc ...
it s look like the system remember a little the graphics data for the GPU

Edit : thank s for the mistake in GB MB

[KvdM]

You can see, except the main with reading 59 GB/min, each clone is half of half reading. 3.4G/min 2.5 GB/min 1 etc ...

Your numbers are a bit off... it's 59 MB/min (notice that the task manager's numbers are in B/min and not in kb/min).

[grap]

yes a mistake. i m not with optical connection
it s B/min
59 783 168 B/min = 59 783 KB/min = 59 MB/min = 1 MB/sec

Over wow ssd reading are lower 50 - 40 - 20 KB/s ... and it s statistic too

[KvdM]

59 MB/min = 980 MB/sec

You mean 980 kb/sec

[Sam DeathWalker]

If its using stored textures in video ram for other instances then my guess that 2G Video Ram cards are the way to go seems to be right ......

Thats a very valuable bit of information there Grap.

[grap]

59 MB/min = 980 MB/sec

You mean 980 kb/sec

yes !
hooooo not good day today !!!!!
i go to sleep now

i ll need to check my result because now 1MB/s is bad even it s small files to read, it must be better number