To PCI-e or not to PCI-e

RacerChuck

Junior Member
Feb 26, 2004
15
0
0
I've got the upgrade bug again. My current system is an i845 Mobo running a 2.4 533 FSB S478 CPU

My Mobo doesn't support 8x AGP so I'm not getting everything I should out of my GeForce Ti 4800.

Anyway, I want to build a gaming monster, and can't seem to find the attributes/benefits of the new PCI-Express ports for the latest video cards (vs conventional AGP), and therefore can't decide what architecture platform to go with (LGA775 or i925)

The 925 Mobo Chipset does 8X AGP and the LGA775 only does PCI-Express

I'm trying to budget ~ $1,100 for the Mobo, CPU, RAM & Video Card

I know this sounds like a systems question, but my architecture decision is pivotal to my Video Card chioce.

Any suggestions?
 

Bateluer

Lifer
Jun 23, 2001
27,730
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Getting a mobo with a PCIe support would give you much more longevity with the system overall. I'd be surprised if we see AGP version of next gen graphics cards, honestly.
 
Feb 24, 2001
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I'm in the same boat, but I'm stuck on PCIe because in a year or year and a half, I don't want to try to sell something that is AGP.
 

DerwenArtos12

Diamond Member
Apr 7, 2003
4,278
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ditto, longevity is the only real plus side of PCIe graphics. NF4 will be out sooner than later with PCIe and all intel is already PCIe so you might as well if you want to make a monster that will last it certainly wouldn't be a bad thing. I take it you want it soon so that will put you with P4 prolly 925x like you said. let me dig around at newegg see what I can pull together. I like doing online system mock-ups.
 

Marsumane

Golden Member
Mar 9, 2004
1,171
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Originally posted by: Bateluer
Getting a mobo with a PCIe support would give you much more longevity with the system overall. I'd be surprised if we see AGP version of next gen graphics cards, honestly.

I couldnt disagree more. Think about it this way. NV and ATI want to sell. That is what they are in the buisness to do. How many people have PCI-e boards today? 10% or less? Thats about what I assume. How many do u think will be a year from now? Less then 50%? Im guessing so. If they were to make the decision to abandon agp, that would mean that atleast 80% of gamers would have to have PCI-E in their systems so that NV and ATI can sell their cards. The truth is that AGP will probably be around for a couple of years. Why did they stop making PCI cards? The bandwidth wasnt enough to support the higher end cards. AGP 4x is ample bandwidth for the majority of graphic cards today. The LATEST generation of cards (x800/6800) are just starting to see SOME benefit from AGP 8x. There were actually tests done with agp 4x vs 8x on a 9800xt and there was NO benefit from even using the "crippled" agp 4x mode. What does this mean? If the market is slow to adapt to pci-e as they have been, and the bandwidth is enough to support the higher end of cards, then nv and ati WILL have to make their cards in an agp form for their next gen (and i dont mean refresh) which will probably be around next year. Basically im saying that ur pretty safe with agp if you dont plan on upgrading until mid 2006 or whenever the generation AFTER the NEXT gen comes out, comes out.

-based on the above info, you are getting more then enough bandwidth for your card to use. You probably are barely even using agp 4x with your aged geforce 4.

-the benfits of pci express are the following:
-more future proof slots
-more bandwidth for video editing (4x) more bandwidth for gaming (2x) (4.2g/s up + 4.2g/s down)
-lack of need for molex connectors on graphics cards
-SLI (note that none of those motherboards support it that u mentioned)

-the drawbacks of pci express (on just setups that uve debated buying aka intel):
-costly for new archetecture in price/performance comparison
-slower then the similarly priced/performing a64 system (even more so in gaming)
-more power requirements (less juice for those future graphic cards)
-more heat emitted from processor (as compared to a64)
-less of a choice in graphic cards
-Intel seems to be lacking in their speed upgrades on processors lately and upgrade paths may change
-brittle pins on LGA775


-what i would do:
1) If i were u, id just upgrade my cpu to anything 3.0 gigs or above and get a 6800gt. This will be well under your budget, probably 1/2. Then, next year build a new rig if u still have that bug.
2) You could also build an A64 3500+ system on socket 939 and get the 6800gt and meet your budget. This is one of the fastest combinations u can have today and will stop that annoying itch to upgrade.
3) Stay away from intel. Intel seems to be having diminishing returns on their speed upgrades and AMD has them beat especially in gaming. A64= gaming chip. Its archetecture is designed in a way that gamers benefit HIGHLY on framerate.
4) Wait for the amd pci express boards to come out. U can use old ddr memory (which performs JUST AS FAST as ddr 2 memory at similar speeds) and u will have the benefits of pci express, without the drawbacks of an intel system in terms of gaming performance. This is expected out near the end of this year. Until then u could experement with your system by overclocking it and it may satisfy that bug long enough for the wait. You also could then take advantage of SLI by purchasing a board with 2 x16 pci-e slots and later, when u get the bug again, u would then just add another card :)

-I hope this helps some. I'm out of time or id list more reasons/ pros / cons / opinions. If you have any questions just reply to the message and ill msg on here more later :p
 

Somniferum

Senior member
Apr 8, 2004
353
0
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Originally posted by: RacerChuck
My Mobo doesn't support 8x AGP so I'm not getting everything I should out of my GeForce Ti 4800.

Honestly, 8x AGP would not help your GeForce Ti 4800 one bit. That card comes nowhere near to saturating the 4x AGP bus.

I have a similar CPU/mobo setup as you, and I'm quite happy with it overclocked to 2.8GHz paired with a gig of DDR2700 and a 9800pro. Sure, the A64 chips are tempting, and I have been this close to buying an A64/mobo combo at Fry's on more than one occasion, but I just can't justify it to myself at this point. Of course, that's partly because I know I'd have to buy a $400 video card to see any benefit, and since you are willing to throw down for the whole package, it may be worth it to you.

Personally if I were to upgrade right now, I would go for the A64 Socket 939 on an NForce3 mobo and 6800GT. But that ain't gonna happen for me right now.

We all get the upgrade itch. Just make sure if you decide to scratch, that you're doing it for the right reasons. The fact that your mobo doesn't support 8x AGP is completely irrelevant to your situation. And make sure that you've wrung every last bit of performance out of your current system (overclocking, tweaking, etc.) before throwing down the money for a new one.
 

nitromullet

Diamond Member
Jan 7, 2004
9,031
36
91
You are confused...

i925 is a chipset, and LGA775 is the type of socket the new Intel cpu's use.Both Intel i915 and i925 are chipsets for LGA775 cpu's and support PCIe. They do not support AGP. The only LGA775 boards that support AGP are based on the i865 chipset.

Right now is honestly not a good time to build a high end computer because your options for PCIe are limited to Intel only. I would wait until PCIe motherbards becaome available for the Athlon64. If you are going high end (which you are), I would go ahead and make the switch to PCIe, but wait until there are more options.
 

RacerChuck

Junior Member
Feb 26, 2004
15
0
0

Nothing like a shot of fresh perspective with my coffee in the morning.

I'm thinking Marsumane is right, however I'm kind of stuck in atrophy land with my current Mobo. It was state of the art at the time, but it only does AGP X1 (v2.0) [It's an intel D845PEBT2] and I suspect it's choking my ti4800 and probably anything else I put in there.

So since the [Mobo/CPU/RAM] has to go, I wanted to head on an upgrade path that had some longevity.

I'm almost faced with the same conundrum as somebody building a fresh system from the ground up.

Who would have thought that was possible a year and a half ago with anything built with the S478

And yes, I did screw up when I was trying to delineate my architecture choices, I ment to say i875 vs D925 as the chipset choices.

Thanks for everyones help

 

Gamingphreek

Lifer
Mar 31, 2003
11,679
0
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NO 845 chipset only supports AGP 1x. All support 4x. P3's even supported 4x most of the time. THe only time it didn't was on early K62,3 and PII's.

PCI-E is only worth it if you are doing high end video encoding, and content creatiion and that as the upstream and downstream are so much faster. Other than that for us gamers it is not necessary yet.

-Kevin
 

apoppin

Lifer
Mar 9, 2000
34,890
1
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alienbabeltech.com
IF you are planning to change your MB (anyway), THEN pciE makes sense.;)

If not, be ASSURED, both nVidia and ATI will continue to support AGP - for the forseeable future (3+ years). ;)

 

OMG1Penguin

Senior member
Jul 25, 2004
659
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AGP came out when... TNT era? I know for sure they had AGP Geforce 256 (1 series), and the last PCI card was Geforce 5 series. That is 5 Generations of video cards in PCI.
So... AGP will probably last 5 more generations.
As far as AGP 4x to 8x, there is little performance difference, since the card doesn't need all the extra bandwidth (even though it IS available). So doubling the bandwidth of AGP 8x to PCI-E will be just as worthless. As far as longevity is concerned, I am sure chipsets will come in AGP and PCI-E versions for the vid card.