6870 in PCIe x16

[mailpranshu]

Hi Guys,

I am booking a 6870 along with a corsair HX 850W(plan to run cross fire later). How much of a performance difference will be there if I run a xfx 6870 on a PCIe x16 slot when compared to a proper PCIe 2.0 or 2.1?

I am upgrading my computer in btched and thats why this question is cropping up. I am upgrading my GPU + PSU first. Then my cpu and motherboard.

My motherboard is a Asus M2A - VM.

Please give me your thoughts.

 

[mailpranshu]

I meant upgrading in batches above.

 

[sportsfanboy]

Even the big boy cards, the GTX 580 and the soon to be released 5970, don't fully saturate the pci-e 1.0 @ 16X. The Future dual gpu cards might be a different story.

 

[henydiah]

check support Motherboard CF/SLI/Hybrid ?

 

[mailpranshu]

No no the mo-bo does not support sli or crossfire. Will performance be similar to a PCIE 2.0 X8?? Cos there is a minute difference in performance anyways between PCIE 2.0 X8 and X16.

 

[mailpranshu]

Along with that will be changing mobo and cpu in a month or two. I am more interested in performance hits. Already going to be bottle necked by my 5600+(2.9 Ghz).

 

[henydiah]

6870 not worth for your Mobo
your Chipset prefer to NVIDA get nvidia GTX450
read review your mobo : http://www.hardwaresecrets.com/article/ASUS-M2A-VM-Motherboard-Review/432/4

 

[Lian]

PCI-E x16 rev 1.1 and 2.0/1 has no performance difference on a 6870.

Had a MSI G31 mobo running that card at x16 1.0 and upgraded my mobo this last week to a Gigabyte P43 PCI-E x16 2.0.

Benchmarks are remarkably similar with no performance gains at all.

 

[mailpranshu]

6870 not worth for your Mobo
your Chipset prefer to NVIDA get nvidia GTX450
read review your mobo : http://www.hardwaresecrets.com/article/ASUS-M2A-VM-Motherboard-Review/432/4

Dude please do not give advice as above. Real benchmarks and numbers would be preferred. I have also clearly mentioned that I will be upgrading my rig over time. At least read the entire question before answering, else do not answer. I obviously already know the limitations of my Mo-bo and processor. (For example, will my card be hampered by less bandwidth?)

Thanks guys.

 

[mailpranshu]

Best answer selected by mailpranshu.

 

[mailpranshu]

PCI-E x16 rev 1.1 and 2.0/1 has no performance difference on a 6870.

Had a MSI G31 mobo running that card at x16 1.0 and upgraded my mobo this last week to a Gigabyte P43 PCI-E x16 2.0.

Benchmarks are remarkably similar with no performance gains at all.

Interesting. Could you post some numbers from some games please. I am hoping that you have your old Mo-Bo around.

 

[Lian]

All I have with old mobo and new mobo in regards to score is Unigine Benchmarks.

Old mobo (MSI G31 PCI-Ex16 1.0):

Unigine
Heaven Benchmark v2.1
FPS:
49.2
Scores:
1240
Min FPS:
22.8
Max FPS:
91.3
Hardware
Binary:
Windows 32bit Visual C++ 1500 Release May 21 2010
Operating system:
Windows 7 (build 7600) 64bit
CPU model:
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
CPU flags:
2921MHz MMX SSE SSE2 SSE3 SSSE3 HTT
GPU model:
Radeon HD 6800 Series 8.782.1.0 1024Mb​

New Mobo (Check sig):

Unigine
Heaven Benchmark v2.1
FPS:
48.6
Scores:
1225
Min FPS:
24.4
Max FPS:
90.8
Hardware
Binary:
Windows 32bit Visual C++ 1500 Release May 21 2010
Operating system:
Windows 7 (build 7600) 64bit
CPU model:
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
CPU flags:
2996MHz MMX SSE SSE2 SSE3 SSSE3 HTT
GPU model:
AMD Radeon HD 6800 Series 8.801.0.0 1024Mb​

On my old mobo i was limited to 2.93Ghz on my CPU coz i couldnt change my CPU voltage. Thats the only diffs other than the Mobo. The PCI-Ex16 2.0 on the score count is 15 less than the x16 1.0 on the benchmark but i would right that off as windows stuff that's not important. Also have CCC 10.12 installed on the new system. Regardless, u get the picture Theres no diffs.