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View Full Version : AGP 8X vs. PCI Express 16


dsessom
12-15-04, 10:32 PM
I am curious to see an apples to apples comparison of the performance increase going from AGP 8X to PCI Express 16.
Does anyone have know of a good comparo, or have 2 identical rigs - one with AGP and one with PCIe?

tristancarton
12-15-04, 11:08 PM
the difference with videocards right now is negligible. however in the future this will change. if you really need a comparison i can find one.
I am curious to see an apples to apples comparison of the performance increase going from AGP 8X to PCI Express 16.
Does anyone have know of a good comparo, or have 2 identical rigs - one with AGP and one with PCIe?

dsessom
12-15-04, 11:22 PM
I will be switching from AGP 8X to PCI Express 16 in the next few months, so I was just curious to see a comparison.

XP_GUN
12-15-04, 11:26 PM
Yeah I heard that right now theres no difference, Maby next Graphics upgrade Ill be going to it too.

One question dsessom

Pentium5 @ 6.4ghz (400x16) 8GB (4x2GB) Corsair XMS PC6400 XFX Geforce 8800 Super Ultra GTX 4x800GB WD SATA2 RAID 0 750W PSU Windows 2005 SemiPro w/SP1.25

Nice computer (snowlol)

dsessom
12-15-04, 11:47 PM
Yeah I heard that right now theres no difference, Maby next Graphics upgrade Ill be going to it too.

One question dsessom

Pentium5 @ 6.4ghz (400x16) 8GB (4x2GB) Corsair XMS PC6400 XFX Geforce 8800 Super Ultra GTX 4x800GB WD SATA2 RAID 0 750W PSU Windows 2005 SemiPro w/SP1.25

Nice computer (snowlol)

I just wanted to see if anyone would notice. :)

rohit
12-15-04, 11:49 PM
Ther cant b apples-to-apples comparison betwn the 2. thats y not a single review has covered it. there is surely a benefit of pci-express over AGP but its very limited at the moment.
There was a review on anadtech.
but systems wer like Amd Athlon64 3400+ With Agp8x nv40GT & intel prescott (Lga-775) 3.4ee with 925x mobo and nv40Gt

So cant say apples to apples.

jAkUp
12-16-04, 12:26 AM
With the new NForce4 boards coming out I'm sure there can be more level comparirions now

Decimator
12-16-04, 05:52 AM
X-bit labs did some benchmarks with the Hlaf Life 2 Timedemos that used PCIe and AGP 8x cards, they benched them with a P4 3.6 Ghz and an A64 3200 though, so they weren't exactly Apples v. Apples.

http://www.xbitlabs.com/articles/video/display/cs-source.html

Dazz
12-16-04, 06:33 AM
Infact that has been on and, nForce4 Vs nForce3 and the i875 Vs the 925X with DDR.

dsessom
12-16-04, 07:06 AM
I think this would be a pretty good apple to apples comparison:

ABIT Fatal1ty AA8XE mobo w/P4 3.4Ghz 1MB cache
1GB PC2-3200 DDR2
XFX 6600GT PCIe16

vs

ABIT IC7-MAX3 mobo w/P4 3.4Ghz 1MB cache
1GB PC3200 DDR
XFX 6600GT AGP

Each with the same HDD, Optical drive, etc.

Faster
12-16-04, 10:28 AM
Yes they have done a comparison at Tomshardware and the truth is that the graphics cards dont need the bandwidth yet.

You can get the same effect by forcing your card to run in 4x AGP. Since there is ALMOST enough bandwidth to run at 4x, there is plenty at 8x and 16x right now, is just a overkill.

Still it is a good marketing ploy and you can bet that intel, AMD, motherboard makers are loving all you guys going out and upgrading. So for those that want to save money, wait 12months till they put out some 4ghz CPUs and a new generation of graphics cards.

Dr.Nick
12-16-04, 10:51 AM
From all the reviews I've seen its actually a tiny bit slower. But like others said, this will change

Dazz
12-16-04, 12:25 PM
Even 4x PCI-E is good enough for gfx. never mind 16x!

Decimator
12-16-04, 12:35 PM
According to X-bit labs:

Moreover, the shift to PCI express x16 also provides a number of other advantages. First of all I would like to mention the independent channels for transferring the data both ways. PCI Express x16 guarantees the 4GB/sec bandwidth for data transfers in either of the directions or in both of them. The AGP 8x bus didnít have any dedicated channels that is why the data could be transferred either one way or another only.


...and I thought that meant that we'll only see the benefits of that ability to transfer 4 GB/s in both directions if developers start coding games, etc to take advantage of it.

Faster
12-16-04, 02:20 PM
...and I thought that meant that we'll only see the benefits of that ability to transfer 4 GB/s in both directions if developers start coding games, etc to take advantage of it..

The developers of games cant do that, the point comes down to the graphics card itself is the limiting factor. The cards today just arnt fast enough to utilize the avaliable bandwidth in PCI-X.

It is just good marketing to get more sales for everyone. Rather then everyone just upgrade to AGP. Nvidia, ATi and whoever else, bring out new graphics cards and then push a new slot type for their card. Instanly everyone needs a new motherboard, CPU and ram too.

I know people who have ditched their P4 systems and gone out to do this for their new 6800 ultra or XT-PE card.

red_star
12-16-04, 03:38 PM
In the Q2 PCIE 2.0 is coming running at 5Ghz. The card having spec of PCIE 2.0 would not be compatible with today's motherboards. However the cards PCIE 1.0 would run on motherboard with PCIE 2.0.

As I said they just ****ing out our heads, and there is no thing called we do for customers. They do only for themselves especially ATI who is not even consider to make AGP cards.

PCIE won't see a benefit in the next 4 years. Even AGP8x has no advantage over AGP4x.

Dazz
12-17-04, 11:16 AM
Or 2x lol there was a diffrence from AGP 1x and 2x but after that nothing.