CPU/Mobo i5 vs i7

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Forerunner
I wanted a good gaming rig which would be future proof and also would be powerful enough for video encoding at high speeds.
I now have two options for the processor
the i5 and i7
which proccy shud i get??
Is there a lot difference in performance between the i5 and i7??
Please help........
 
ya there is a difference, i would say the i7 based on the 1366 pin is a good buy coz when the new hexa core CPUs come out you can upgrade without changing the MB :)
 
I would say i7 860 on LGA1156 with a cheap P55 motherboard, the combo will be much cheaper and will beat i7 920 at almost all the things, and be almost near the i7 940...

But you would be only as much future proof as the socket 1156, which I think intel will not abandon, and we will see toned down version of hexa core on this socket as well.

i5 is killed by lack of hyper threading and that is the main cause...

Another major difference is the dual channel memory controller in i5 and i7 8xx compared to i7 9xx which has triple channel memory controller but the performance difference is minimal. i5 and i7 8xx do have a better turbo mode, which sees i7 860 above i7 920.

And that is why i7 860 is the winner, as it retains hyper threading and dual channel does not make much difference and has a better turbo mode which makes a lot of difference in single core processes and gets a price cut and is below i7 920 only price wise.
 
i5 is killed by lack of hyper threading and that is the main cause...

Another major difference is the dual channel memory controller in i5 and i7 8xx compared to i7 9xx which has triple channel memory controller but the performance difference is minimal. i5 and i7 8xx do have a better turbo mode, which sees i7 860 above i7 920.
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Gaming hardly takes advantage of quad cores, forget hyper threading... IMO i5750 is the best VFM you have right now, and should fit the OP's criteria pretty well.
 
Aces170 said:
I5 is a simply better VFM, X58 mobos will cost you quite a lot.
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Aces170 said:
Gaming hardly takes advantage of quad cores, forget hyper threading... IMO i5750 is the best VFM you have right now, and should fit the OP's criteria pretty well.
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he has clearly written he also needs it for video encoding. afaik i5 doesnt have ht so i5 will only have 4threads while encoding. i7 will have 8threads & hence will be much faster than the i5 for cpu intensive apps like encoding.
 
Aces170 said:
Gaming hardly takes advantage of quad cores, forget hyper threading... IMO i5750 is the best VFM you have right now, and should fit the OP's criteria pretty well.
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what is your point, VFM? cause i7 860 + cheap P55 has a much better VFM then i5 750 + cheap P55...

difference of 3 to 4K and performance increase overall is awesome...

Forza Milan
 
3k to 4k increase in price, equates to 30-40% increase. Now AFAIK i7 860 is not 30-40% faster compared to i5750 and both the Lynnfield have have the PCIE bus locked issue while overclocking.
 
stormblast said:
he has clearly written he also needs it for video encoding. afaik i5 doesnt have ht so i5 will only have 4threads while encoding. i7 will have 8threads & hence will be much faster than the i5 for cpu intensive apps like encoding.
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Theoretically yes, but practically very little apart from X264 encoding.

AnandTech: The Intel Core i7 860 Review

In x264 encoding 860 is considerably quicker, i5750 is no slouch, & I stand by my initial post its yet a better VFM...

Also I think the gap will close quite a lot with a clock speed match up. Apart from a few test I havent come across HT being excessively benefecial. Gaming it has a nada difference.
 
Cheapest P 55 board in India is @ 6.8k+
Cheapest X58 mobo is 10k+

for workstation and heavy duty work i7 920 + MSI X58 is good.
it oveerclocks better than i5 too
 
An low end X58 platform and a i920 should do you good without ripping a hole in your wallet.
The i7 860 is expensive and castrated.
 
Go with a UD3R and a 920 , the 1366 platform should see an affordable 6/8 core towards the end of its life and that will extend the whole platforms life by a good margin.

It will also perform slightly better . The i7 860 is a little overpriced right now it doesnt make sense. Even though "games dont take advantage of cores" is a common lament and very often quoted its only a matter of time and if you can you would rather be prepared if the slight extension in budget isnt a problem.

Its how cpu's will evolve ..... instead of adding clock speeds they will add cores , so the coding is expected to catch up to that very very soon.
 
^^ You guys keep talking about future upgradability but how many of us upgrade the proccy only? 7 times out of 10 times we will upgrade the whole platform, because either one or more parts of the platform will create a bottleneck.

What makes you think DDR 3 or PCIE bus wont reach the end of road by then, or what if DDR 3 prices are higher, performance is lower etc.

I would always recommend buy what is better at present, as predicting tech is next to impossible..
 
Forget hexa core gultown on lga 1366 (x58) platforms as they will retail for 1500$ and there won't be any applications to take advantage of it and even now games are optimised for quad core not designed for them.

Frankly speaking, i7 860 and i5 750 are much better than i7 920.

If ur priority is video encoding take i7 860 (granted u have budget for it) and take i5 750 (only when u don't have budget for it)

So here goes

P55 chipsets

Cpu : Core i5 750 - 10k/ Core i7 860 -15k

Mobo : Gigabyte GA P55m UD2 - 7k ( If u have no intention of Sli/CF)

MSI P55-GD65 - 10.5k ( If u have intention of Sli/CF)

X58 chipsets

Cpu : Core i7 920 -15k

Mobo : MSI x58 pro - 11k

Bear in mind that except video encoding , i5 750 is winner with eyes closed.

Everything depend on what ur budget is .
 
Aces170 said:
^^ You guys keep talking about future upgradability but how many of us upgrade the proccy only? 7 times out of 10 times we will upgrade the whole platform, because either one or more parts of the platform will create a bottleneck.
What makes you think DDR 3 or PCIE bus wont reach the end of road by then, or what if DDR 3 prices are higher, performance is lower etc.
I would always recommend buy what is better at present, as predicting tech is next to impossible..
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+ 1 for Aces120.

Very well wrapped buddy.
 
I donno dude..
if you buy a high end mobo now thinking that after 1-2yrs you can upgrade to a 6 core or 8 core or whatever, I'm pretty sure that at that point of time you are going to be told it is better to upgrade both cpu and mobo. And trusting Intel, whatever cpu is available then, probably isnt even going to fit on your board.

I would say best bet would be to buy the best combo that fits in your budget..

edit: +1 to what Aces170 said..
 
Aces170 said:
^^ You guys keep talking about future upgradability but how many of us upgrade the proccy only? 7 times out of 10 times we will upgrade the whole platform, because either one or more parts of the platform will create a bottleneck.
What makes you think DDR 3 or PCIE bus wont reach the end of road by then, or what if DDR 3 prices are higher, performance is lower etc.
I would always recommend buy what is better at present, as predicting tech is next to impossible..
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very well said...people keep saying about hexa core cpus...but how many of us really need it ?? and how many will upgraede immediately when they come ?
Also point to be noted here is that there is not huge difference in 860 and 750
and 750 once OCed not talkin about hitting 4GHz etc...but moderately gives very nice results. ;) I personally got it and i am loving it :)
 
In video encoding, i5 750 performs at 75% speed of the expensive i7 870 priced@ 28k. So no doubt, i5 750 performs at at least 85% speed of i7 860 for encoding. So, i5+ a better graphics card is always a better option. In gaming, the better card makes more difference if you use any of those cpus. But you would not go wrong with 860 anyway.
 
vercetti4x6 said:
In video encoding, i5 750 performs at 75% speed of the expensive i7 870 priced@ 28k. So no doubt, i5 750 performs at at least 85% speed of i7 860 for encoding. So, i5+ a better graphics card is always a better option. In gaming, the better card makes more difference if you use any of those cpus. But you would not go wrong with 860 anyway.
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Absolutely right. Go for wat fits in ur budget now, keeping in mind that it's futureproof and won't drill holes into ur pockets.

Very well said
 
Have you checked out the video encoding performance of Graphics cards? Since this is primarily a gaming system, you will be definitely getting a current gen GPU.

Both nVidia and AMD cards have softwares for GPU based video encoding.
Check the links below, in all of them the graphics cards are performing significantly faster than the CPUs.

Check the processors used as they are different in all the reviews.

Let?s Pull Some Shots! - Review Tom's Hardware : ATI Stream: Finally, CUDA Has Competition

AnandTech: Badaboom: A Full Test of Elemental's GPU Accelerated H.264 Transcoder

NVIDIA GPU Computing & CUDA FAQ | GT200,GTX 280,GTX 260,CUDA,PhysX,Tesla,F@H,heterogeneous computing,Questions and answers about NVIDIA heterogeneous computing with the GPU and CUDA. | Benchmark Reviews Performance Tests
only image quality comparison between nVidia and AMD. no benchmarks
Elite Bastards - GPU video transcoding image quality - NVIDIA CUDA versus AMD Stream
 
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