Difference between pcie 1.1 & 2.0

[adi21goswami]

i have pcie 1.1
i wan to buy gtx 460 but it is pcie 2.0 card
gtx 460 run on pcie 1.1
if yes its performance reduces & how much...
pls help for this....

 

[Griffolion]

PCI E 1.0 spec has a bandwidth of 250GB/S, 2.0 is double that.

You will be running at a lower bandwidth between your GPU and CPU, this may hit performance somewhat, you won't be getting the most from your 460.

Upgrade your motherboard to a newer one (2007 onwards) and you'll see 2.0 spec slots.

 

[Zenthar]

If you are using a single card, the performance difference will be minimal to non-existent. Not worth upgrading your MB unless you can do that for dirt-cheap.

 

[demonsparkx]

since this thread seems to still be open, i too am also wondering about the 1.1 vs 2.0 PciE bandwidth issue. since as stated above the 1.1 PciE runs at a 250GB/Ps bandwidth, if your GPU runs/has a 250GB/Ps or lower data rate, wouldn't the 1.1 vs 2.0 be irrelevant in that case? for example, in my case i have a PciE x16 slot running at x16 1.1. and if i were to use say a GTX 550/560Ti on my board and they use less then the 250GB/Ps, my 1.1 wouldn't be limiting the card since its not even using the slots full bandwidth to begin with? i hope that came out right. it seems that the 1.1 vs 2.0/3.0 pciE really starts to differ in speed in terms of Xfire/SLI. which most 1.1 mobo's do not feature to begin with. i hope someone can clarify my statement.

 

[Zenthar]

since this thread seems to still be open, i too am also wondering about the 1.1 vs 2.0 PciE bandwidth issue. since as stated above the 1.1 PciE runs at a 250GB/Ps bandwidth, if your GPU runs/has a 250GB/Ps or lower data rate, wouldn't the 1.1 vs 2.0 be irrelevant in that case? for example, in my case i have a PciE x16 slot running at x16 1.1. and if i were to use say a GTX 550/560Ti on my board and they use less then the 250GB/Ps, my 1.1 wouldn't be limiting the card since its not even using the slots full bandwidth to begin with? i hope that came out right. it seems that the 1.1 vs 2.0/3.0 pciE really starts to differ in speed in terms of Xfire/SLI. which most 1.1 mobo's do not feature to begin with. i hope someone can clarify my statement.

Bandwidth isn't everything, there is a bit more involved as well, but you summed it up right. In reality, as the card gets close to the theoretical maximum, performance will start to drop. You will see the same behaviour with SSD and SATA2 vs SATA3, even if some SATA3 drives don't saturate the SATA2 throughput, they still perform slightly better on SATA3.

Does that help?

 

[demonsparkx]

okay yes, that makes sense. so in theory two same gpu's in this case just say a 550Ti. each on a pciE x16 slot, with one being the 1.1 and one being on a 2.0, the one in the 2.0 slot would technically perform slightly better,but more then likely wouldn't be a noticeable difference in the sense of say FPS increase.

 

[Zenthar]

okay yes, that makes sense. so in theory two same gpu's in this case just say a 550Ti. each on a pciE x16 slot, with one being the 1.1 and one being on a 2.0, the one in the 2.0 slot would technically perform slightly better,but more then likely wouldn't be a noticeable difference in the sense of say FPS increase.

If in either cases the usage doesn't get too close to the saturation of the 1.1 bandwidth, the difference would be minimal yes.