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390x low firestrike and heaven scores. - Page 2

post #11 of 15
The Intel Z170 Chipset is what they tested it on... The slots are limited by "Power Only"... The chipset specs are here... It makes up for this lack of power from the slot through the PCIe power... Only way to compare is if you can find 1 CPU that supports a PCIe 2.0 compliant Chipset & a PCIe 3.0 compliant Chipset... Can't compare PCIe 2.0 on a PCIe 3.0 compliant Chipset... All these really mean is power... has to do with more traces etc on newer tech board and chipsets...

PS - They show less than 1 fps less from PCIe 2.0 to 3.0... Install a 1080 in a PCIe 2.0 system and just watch how low the fps is at max details ... No where near 78fps on PCIe 2.0... hahahaha .. maybe 1080p .. that's like 100fps but it's when you get to 4k is when PCIe 3.0 really shows it's difference mainly and just how high you have the settings.... Max Anti aliasing and all that jazz your looking at 40fps on PCIe 2.0 haha

If they really wanted to know if setting their board or using a slot designated to be "Slower"... They would use AIDA GPGPU to see how fast the GPU memory read/ write is... PCIe 2.0 max theoretical is 8.0GB/s but in reality is 6.3 to 6.7GB/s... PCIe 3.0 is theoretical max 16.0GB/s but in reality 12 to 14GB/s on GPU memory read/ write.

Intel® Z170 Chipset

Expansion Options

PCI Support
No
PCI Express Revision
3.0
Max # of PCI Express Lanes
20
Edited by chris89 - 4/27/17 at 7:31am
post #12 of 15
Quote:
Originally Posted by chris89 View Post

The Intel Z170 Chipset is what they tested it on... The slots are limited by "Power Only"... The chipset specs are here... It makes up for this lack of power from the slot through the PCIe power... Only way to compare is if you can find 1 CPU that supports a PCIe 2.0 compliant Chipset & a PCIe 3.0 compliant Chipset... Can't compare PCIe 2.0 on a PCIe 3.0 compliant Chipset... All these really mean is power... has to do with more traces etc on newer tech board and chipsets...

PS - They show less than 1 fps less from PCIe 2.0 to 3.0... Install a 1080 in a PCIe 2.0 system and just watch how low the fps is at max details ... No where near 78fps on PCIe 2.0... hahahaha .. maybe 1080p .. that's like 100fps but it's when you get to 4k is when PCIe 3.0 really shows it's difference mainly and just how high you have the settings.... Max Anti aliasing and all that jazz your looking at 40fps on PCIe 2.0 haha

If they really wanted to know if setting their board or using a slot designated to be "Slower"... They would use AIDA GPGPU to see how fast the GPU memory read/ write is... PCIe 2.0 max theoretical is 8.0GB/s but in reality is 6.3 to 6.7GB/s... PCIe 3.0 is theoretical max 16.0GB/s but in reality 12 to 14GB/s on GPU memory read/ write.

Intel® Z170 Chipset

Expansion Options

PCI Support
No
PCI Express Revision
3.0
Max # of PCI Express Lanes
20

I fail to see the point you're trying to make. Is PCI-e 3.0 faster? Undoubtedly but how does that really translate in game? You're speaking of OpenCL GPGPU benchmark but what's the actual point there? There's none so stop trying to make your argument PCIe3 is actually going to make a huge difference because it won't. Period.
Show me pcie2 on pcie3 system is not pcie2. So far I couldn't see anybody reporting more than a couple of % performance difference. PCI-e does perform better the higher the resolution but I don't think the OP even has high resolution.
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post #13 of 15
The reason why they improve the PCIe bus is to speed up the GPU... It's as simple as that... If AMD knew PCIe 1.0 was only 0.00000001% slower than PCIe 5.0... then the latest GPU's would have PCIe 1.0 and would be limited to 4GB/s In & Out of the Slot from the SYSTEM MEMORY.

Maybe I put too much information... Pickup a PCIe 3.0 board Ryzen and compare the same GPU on both boards... Just watch how all the FPS you have been missing out on Unfolds before your very eyes Bro wink.gif Later
post #14 of 15
Quote:
Originally Posted by chris89 View Post

The reason why they improve the PCIe bus is to speed up the GPU... It's as simple as that... If AMD knew PCIe 1.0 was only 0.00000001% slower than PCIe 5.0... then the latest GPU's would have PCIe 1.0 and would be limited to 4GB/s In & Out of the Slot from the SYSTEM MEMORY.

Maybe I put too much information... Pickup a PCIe 3.0 board Ryzen and compare the same GPU on both boards... Just watch how all the FPS you have been missing out on Unfolds before your very eyes Bro wink.gif Later

It does not speed up the GPU but increase the data bandwidth. This is why PCIe-3.0 only start to *really* shine with high resolution.
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post #15 of 15
Quote:
Originally Posted by Just a nickname View Post

It does not speed up the GPU but increase the data bandwidth. This is why PCIe-3.0 only start to *really* shine with high resolution.

Thanks yes this is true. Though even 1080p can be limited by it on 8x AA Extreme Ultra Unigine for instance. If only I had Ryzen I would know the actual difference...
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