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 Post subject: Core i5
PostPosted: Tue Sep 08, 2009 7:38 am 
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Finally i5 is formally announced along with some new i7 CPUs. Going through the usual hardware site writeups in detail now. They're pretty much as expected, like their big brother i7 with one less memory channel and ditching of HT and the QPI links, offset somewhat by the moving of one 16x (splitable to two 8x) PCIe onto the CPU itself. So multi GPU types will still prefer i7 but I think normal people wont be hurt by these limitations at all.

Street pricing at one supplier I looked at shows the i5 750 to be about 75% the price of the lowest i7 920. More savings should be possible on the motherboards, although for now it is a little harder to compare here. So while there are savings to be had, it isn't quite as big as I hoped, but it is still early days.

The i5 systems should be lower power consuming overall but the new stepping i7 are also lower power consumption. It's going to be a hard choice between them for my next box, and will likely be decided by motherboard choice.

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 Post subject:
PostPosted: Tue Sep 08, 2009 7:56 am 
i dont know, for the power user the 9xx i7's represent a huge dirrerence, mainly for the tripple channel RAM as opposed to only dual on the new i7 and i5.(thats me) and some of the other losses you mentioned earlier. ow and 8 threads is nice for anyone :)

that said if i got my mum a PC right now i would not bother with the 9xxi7's

at my local PC store the 920 is cheaper than the new i7 860 and 870.

werid hey?


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 Post subject:
PostPosted: Tue Sep 08, 2009 11:39 am 
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As always new stuff often comes at a premium initially but should reach more reflective levels shortly. The 860 and 920 have the same list price, and in the longer term the 860 should be the desirable one with a higher clock and lower power consumption.

If absolute performance is the concern, then i7 is a no brainer. But under the vast majority of circumstances the increased bandwidth isn't needed. HT is more of a wild card. I don't know if it has improved from the P4 implementation. There I saw in best case conditions a 50% increase in throughput from having it, but more normally it was closer to zero. For my expected workload I don't think I'd really gain from having the increased number of virtual cores, and may even be a negative impact.

The only curiosity I have at the moment is that there is only a single i5 CPU. I'm guessing the older Core 2 will hold onto the lower positions for a while yet, before lower i5 is introduced. They may make the price/performance ration even more tempting.

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 Post subject:
PostPosted: Tue Sep 08, 2009 12:49 pm 
From the AnandTech article, they look promising. Online stores show that the 860 cost a few dollars more than the 920 but even before the prices have fallen, you will save a lot by going with P55 for the motherboard.

Intel and the mobo manufacturers have done well to make sure that there were plenty of boards available at launch.

Curious to see how they overclock...


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 Post subject:
PostPosted: Tue Sep 08, 2009 8:26 pm 
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I just realised I made a mis-reading earlier today. The new i7 CPUs from today are in the same socket as i5, not the old i7 socket. So there are some interesting combinations possible. Maybe I'd go for the i7 860...

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 Post subject:
PostPosted: Mon Sep 14, 2009 8:57 pm 
I've been looking into getting a new PC for a while now and despite the fact that I would probably prefer one built by a well known brand because of warranty, I just can't find a combination close to what I'd want, so it seems I'll be building my own computer again.

I won't go for i7 9xx, as the cheapest of them are said to be discontinued and it's likely that anything faster than a i7 920 would cost me what I probably won't be willing to pay in the future.

I was playing with the idea of building myself an AMD rig again, but what I'd build using either Core i5 750 or i7 860 wouldn't cost me that much more and even i5 750 seems to perform like the Phenom II X4 955 or better, and while there's Athlon II X4 620 which seems to perform as well or better than Q8200 and costs half of what the i5 750 does while having about 80-95% of its performance, I think I'll go for the i7 860 as I think I'll be able to exploit that 8 thread capable CPU well, while having a more room for multitasking if I manage to make a few cores busy.
The i860 does cost about three times more than the Athlon II X4 620, but right now, it seems to me to be a more future proof investment.


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 Post subject:
PostPosted: Tue Sep 15, 2009 9:21 am 
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1156 is for consumer/enthusiast line

1366 is for workstation/server use

Also the i7 processors are slightly faster than the equivalent on 1156, but do bare in mind the processor isn't always getting a full load or use of the tipple channel memory in most "normal" applications just now, thats when you'll see the 1366 varients pull ahead, despite being slightly older.

Also bare in mind the 1366 socket fits the Xeon line and the upcomign Core i9 6-core processors, hyperthreaded meaning 12 threads per cpu. Xeon boards can take dual cpu's so thats 24 threads...

Socket 1366 is clearly ment to be a bit of a beast, the motherboards designed around it show this too. Theres boards out there with some crazy configurations.

Socket 1156 and the Core i5 is more than good enough for gaming just now as little or no difference has been shown in most of the benchmarks.

That said, I want a bit more upgradeability in the next 12 months, I knew the Core i9 was on the roadmap so seemed like a good idea. 32nm 6 Core 3GHz 12-16MB Cache CPU's can't be a bad thing?

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