Core i7-4770K: Haswell's Performance, Previewed

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PCI-E 3.0 is a marketing gimmick. it will be 2-3 more generations of GPUs before it will show even a slight performance boost over pci-e 2.0x16.

Benchmarks I remember seeing gave PCIe 3.0 x16 a 1-2% advantage for single-GPU setups. While this is negligible and within what would generally be considered within measurement error, I would still technically count it as a 'slight' (measurable but not directly observable) improvement.

Pretty sure I have seen SLI/CFX scaling benchmarks showing a wider gap for x8x8 but I think even that was only ~5%.

Nothing worth spending $200 on a new CPU for but slight improvements nonetheless.

 

[ingtar33]

PCI-E 3.0 is a marketing gimmick. it will be 2-3 more generations of GPUs before it will show even a slight performance boost over pci-e 2.0x16.

Benchmarks I remember seeing gave PCIe 3.0 x16 a 1-2% advantage for single-GPU setups. While this is negligible and within what would generally be considered within measurement error, I would still technically count it as a 'slight' (measurable but not directly observable) improvement.

Pretty sure I have seen SLI/CFX scaling benchmarks showing a wider gap for x8x8 but I think even that was only ~5%.

Nothing worth spending $200 on a new CPU for but slight improvements nonetheless.

i'd like to see those numbers, because they're contrary to every test i've seen.

I've seen a 1-2% spread on - 2.0x16 vs 2.0x8, and 5% on a 2.0x8 vs 2.0x4... but i've never seen any numbers indicating an improvement over 2.0x16

 

[ubercake]

2.0 x16 bandwidth=3.0 x8 bandwidth.

When 2 PCIe 3.0 slots are populated on a z77 board, most motherboards have each slot running x8 (=PCIe 2.0 x16).

The only bandwidth advantage might be realized with a 2 GPU card at PCIe 3.0 x16 (only one slot populated) rather than in a board with PCIe 2.0 x16.

 

[InvalidError]

i'd like to see those numbers, because they're contrary to every test i've seen.

I've seen a 1-2% spread on - 2.0x16 vs 2.0x8, and 5% on a 2.0x8 vs 2.0x4... but i've never seen any numbers indicating an improvement over 2.0x16

Here's a rather exhaustive comparison from Techpowerup:
http://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI-Express_Scaling/12.html

PCIe 3.0 x16 is at least 1% ahead of PCIe 2.0 x16 in almost every benchmark at 1200p and 1600p. I doubt many people buy HD7970s to play at 1680x1050 or lower where PCIe 2.0 sometimes pulls ahead of 3.0.

 

[ingtar33]

i'd like to see those numbers, because they're contrary to every test i've seen.

I've seen a 1-2% spread on - 2.0x16 vs 2.0x8, and 5% on a 2.0x8 vs 2.0x4... but i've never seen any numbers indicating an improvement over 2.0x16

Here's a rather exhaustive comparison from Techpowerup:
http://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI-Express_Scaling/12.html

PCIe 3.0 x16 is at least 1% ahead of PCIe 2.0 x16 in almost every benchmark at 1200p and 1600p. I doubt many people buy HD7970s to play at 1680x1050 or lower where PCIe 2.0 sometimes pulls ahead of 3.0.

i'd call 1% difference within a margin of error. but thank you for the link. that is the first article i've ever seen that was able to achieve a result that favored 3.0 over 2.0...

which i'd say only highlights the fact that pci-e 2.0 x16 isn't being saturated yet by modern gpus.

 

[Prasanth Davade]

Review is very informative. But I think AMD needs more cooling than Intel processors. Am i Right ?

 

[ingtar33]

Review is very informative. But I think AMD needs more cooling than Intel processors. Am i Right ?

yep

not only are they more energy inefficient, but they operate with a lower thermal ceiling... meaning even IF they were as efficient, you'd still NEED a better cooler

 

[urbanman2004]

I'm still anticipating when companies like EVGA and ASUS will finally have a release date for the Z87 mobos. It's just a matter of time before I decide to upgrade, but I doubt I’d be upgrading to a Haswell CPU if it’s only going to show little to marginal gains.

 

[yogesh_gamer]

if iGPU and power consumption doesn't matter than is there any difference between i5 3570 and i5 4670?

 

[yogesh_gamer]

[citation][nom]yogesh_gamer[/nom]if iGPU and power consumption doesn't matter then is there any difference between i5 3570 and i5 4670?[/citation]