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Whats the difference between PCIe 2.0 and PCIe 1.0

Last response: in Graphics & Displays
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August 9, 2010 7:43:34 PM

whats the difference between PCIe 2.0 and PCIe 1.0 and can i run a 2.0 card in a 1.0 slot and what would be the best graphics card for my system

System specs:
AMD Athlon 64 x2 dualcore processor 4200+ 2.2GHZ
4.00GB RAM
NVIDIA 8400 GS is the current card
a b U Graphics card
August 9, 2010 7:50:32 PM

PCIe 1.0 has half the bandwidth of a PCIe 2.0 slot of the same width

PCIe 1.0 and PCIe 2.0 are backwards and forwards compatible so you can put a 2.0 card in a 1.0 slot, but it will run at 1.0 speeds
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August 9, 2010 7:53:56 PM

So is it even worth buying a 2.0 card
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a b U Graphics card
August 9, 2010 7:54:47 PM

spliff5522 said:
whats the difference between PCIe 2.0 and PCIe 1.0 and can i run a 2.0 card in a 1.0 slot and what would be the best graphics card for my system

System specs:
AMD Athlon 64 x2 dualcore processor 4200+ 2.2GHZ
4.00GB RAM
NVIDIA 8400 GS is the current card


Other than bandwidth, there no difference between pci-e 1.0 and 2.0.

As for can you run a 2.0 card on a 1.0 slot? Yes. PCI-e slots & cards of both versions can run in any of the configurations.

http://en.wikipedia.org/wiki/PCI_Express

As for what gpu to get. Kind hard to say. You are going to lose a little bit of performance by not running a pci-e 2.0 card on a 2.0 slot, but the cpu is going to be more of the bottle neck. :/ 

Also what games are you playing?


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a b U Graphics card
August 9, 2010 7:56:54 PM

spliff5522 said:
So is it even worth buying a 2.0 card


Yeah it'll worth it.

PCI-e 1.0 x16 bandwidth = PCI-e 2.0 x8 speed

And we see even with the lastest gpu's that it takes a high end setup to see a difference between pci-e 2.0 x8 and x16.
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August 9, 2010 7:59:16 PM

i want to play starcraft 2
i forgot to mention my PSU is 450watt
my budgets around $400
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a b U Graphics card
August 9, 2010 8:03:14 PM

yes it is worth it, you'll only see about a 4% drop in performance from x16 to x8

i'd recommend an ati hd5770
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August 9, 2010 8:17:58 PM

cool so with the ati hd5770 there should no isuues even with a 2.2ghz cpu or should i try and upgrade that as well

sorry i'm still kinda new to the hardware stuff
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August 9, 2010 8:22:00 PM

What cpu? how many cores?
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a b U Graphics card
August 9, 2010 8:24:51 PM

spliff5522 said:
cool so with the ati hd5770 there should no isuues even with a 2.2ghz cpu or should i try and upgrade that as well

sorry i'm still kinda new to the hardware stuff


you might run into a slight bottleneck
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August 9, 2010 8:27:35 PM

AMD Athlon 64 x2 dualcore processor 4200+ 2.2GHZ 2 cores
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!