Crossfire 4830's on a P35 motherboard?

BrooksyX · Apr 23, 2009

Hey so I've been thinking about picking up a second 4830 for cheap and crossfiring them. However the only thing that is holding me back is that the second pci-e slot is only 4x speed. Would it be worth going crossfire on a P35?

Well I decided to give it a try and here are the results so far with 3Dmark06 and Vantage.

3dmark06 with crossfire disabled:

3dmark vantage with crossfire disabled:

3dMark06:

3DMarkVantage:

As you can see I got a pretty big increase with crossfire enabled.

method526 · Apr 23, 2009

save your money for a new board if you want crossfire (x38, x48, x58, maybe p45 if you want but the x series takes it). no point for crossfire unless you play on large resolutions. just my opinion.

Kursah · Apr 23, 2009

What resolution do you game at BrooksyX? method has a good point there. I've heard CF with 16x and 4x isn't as bad as many would assume, but I really don't know tbh as I prefer single slot/gpu/card solutions, but you could get the card now and upgrade the board to an x38/48 later if you feel it'd be worth it.

I'd say do some google searching on p35 CF vs x38 CF, see what you come up with, and if the extra power is even needed at your current gaming resolutions (barring Crysis lol, but who cares anymore?). I'd say if you wanna do it, go for it, and if you're not happy you can always upgrade later. I'm sure more experienced CF users will pipe in soon enough, my suggestion could be really bad lol!

:toast:

BrooksyX · Apr 23, 2009

Right now I play at 1680 x 1050. I may upgrade to a 24" by the end of the summer though and that will have a much bigger resolution.

DaMulta · Apr 23, 2009

two of those cards runs about as fast as one 280GTX card.

Go look up reviews to all that do not believe me.

Kursah · Apr 23, 2009

I just upgraded from an Acer 22" 1680x1050 to an Asus 24" 1920x1080, looks amazing, I didn't notice any performance drop nor had to change any settings in any games I play. If you plan to go with a larger monitor down the road it wouldn't hurt to have more power I'm sure but even a single 4830 is pretty damn powerful. I know Shadowfold ran at 1920x1080 on his 4830 and 4830CF setups. I think you'll be pretty happy overall.

:toast:

kenkickr · Apr 23, 2009

I would not waste your money due to the motherboard chipset. I have two 4830's in CF and they are awesome but I think due to the 2nd PCI-E slot only running x4 your not going to notice much performance wise. I would save up for a newer board, then go and get a 4830(Get the new single slot XFX one...HOT and SEXY!!)

BrooksyX · Apr 23, 2009

kenkickr said:
I would not waste your money due to the motherboard chipset. I have two 4830's in CF and they are awesome but I think due to the 2nd PCI-E slot only running x4 your not going to notice much performance wise. I would save up for a newer board, then go and get a 4830(Get the new single slot XFX one...HOT and SEXY!!)

Yeah, unfortunately I don't wanna purchase another 775 motherboard. I think it would be a waste considering i7 is out now. But there is no need to upgrade from my q6600 and I can't afford to go i7 right now anyways.

mlee49 · Apr 23, 2009

I say no, the preformance increase for my second 4830 was a few thousand 3D06 marks but not double so I say the $80 you'll be dropping on the second card may not show up in the overall FPS for a higher resolution.

How do you like the current settings you game at? I'd say stick it out for a minute longer or just do a complete part out of your 775 stuff and jump ship to an i7. Theres got to be some $ comming your way, birthday/graduation present/parents loaning you couple hundred bucks. :laugh:

mrhuggles · Apr 23, 2009

you'll be fine, personally i would go with something WAY bigger, and a Q8200 with 600mhz fsb 7x multiplier, 1:1 memory ratio [ddr2 1200mhz]

something you cant do so terribly easy on a X38/X48/p45

BrooksyX · Apr 23, 2009

mlee49 said:
How do you like the current settings you game at? I'd say stick it out for a minute longer or just do a complete part out of your 775 stuff and jump ship to an i7. Theres got to be some $ comming your way, birthday/graduation present/parents loaning you couple hundred bucks.

Well I don't have any free money coming my way, but I am about to get hired on for a second job. Just have to pass a background check and drug test. Which won't be a problem considering I have never committed a felony and I have never done drugs. Don't wanna spend to much cash though as I am saving for my next year of college.

I would probably be able to sell my q6600 for quite a bit. They go pretty high on ebay.

mrhuggles said:
you'll be fine, personally i would go with something WAY bigger, and a Q8200 with 600mhz fsb 7x multiplier, 1:1 memory ratio [ddr2 1200mhz]

something you cant do so terribly easy on a X38/X48/p45

A q8200 would be a performance decrease from a q6600.

Mussels · Apr 23, 2009

BrooksyX said:
Hey so I've been thinking about picking up a second 4830 for cheap and crossfiring them. However the only thing that is holding me back is that the second pci-e slot is only 4x speed. Would it be worth going crossfire on a P35?

i ran crossfired 4870's on my P35 and had less than a 10% boost upgrading to an x48.

Its pure BS when people talk about this stuff, the second GPU doesn't need as much bandwidth as the first, the communication goes over the crossfire bridge.

BrooksyX · Apr 23, 2009

Mussels said:
i ran crossfired 4870's on my P35 and had less than a 10% boost upgrading to an x48.

Its pure BS when people talk about this stuff, the second GPU doesn't need as much bandwidth as the first, the communication goes over the crossfire bridge.

Hmm well if thats the case then I should definitely go for it.

mrhuggles · Apr 23, 2009

a Q8200 would be a performance decrease at 600mhz fsb? your right thats only 4.2ghz, much less than your erm, 3ghz? on the q6600... youd have it clocked much higher, and have much more memory bandwidth, where is the downside?

i guess the only down side is that you cant do that with a X38 or X48, you can with a p45 but only on water.

Mussels · Apr 23, 2009

mrhuggles said:
a Q8200 would be a performance decrease at 600mhz fsb? your right thats only 4.2ghz, much less than your erm, 3ghz? on the q6600... youd have it clocked much higher, and have much more memory bandwidth, where is the downside?

i guess the only down side is that you cant do that with a X38 or X48, you can with a p45 but only on water.

you're absolutely insane thinking that 600FSB is going to be possible. most of these chips cant even hit 500, regardless of the motherboard and how well its cooled.

erocker · Apr 23, 2009

For your current monitor two 4830 512mb cards would be great, even if the 2nd PCI-E slot was at 4x. If you are going to be running at 1920x1200 eventually you are going to want two 1gb cards.

BrooksyX · Apr 23, 2009

Mussels said:
you're absolutely insane thinking that 600FSB is going to be possible. most of these chips cant even hit 500, regardless of the motherboard and how well its cooled.

lol, I was thinking the same thing.

BrooksyX · Apr 23, 2009

erocker said:
For your current monitor two 4830 512mb cards would be great, even if the 2nd PCI-E slot was at 4x. If you are going to be running at 1920x1200 eventually you are going to want two 1gb cards.

alright, i might pull the trigger tonight. I found a second card (exact same as mine) new in box for $70 shipped. Very tempted. Even though I have no problems running everything I currently have.

Kursah · Apr 23, 2009

mrhuggles said:
a Q8200 would be a performance decrease at 600mhz fsb? your right thats only 4.2ghz, much less than your erm, 3ghz? on the q6600... youd have it clocked much higher, and have much more memory bandwidth, where is the downside?

i guess the only down side is that you cant do that with a X38 or X48, you can with a p45 but only on water.

True but pushing 600FSB 24/7 for a gaming rig makes little sense imo. If his setup is fine as-is as-far-as CPU/bandwidth-wise for gaming, he will see little to no benefit in that newer Q, DDR1200 memory and 600FSB. I've played with many OC's and builds over the years, the biggest impact is gaming and resolution. Sure having a faster CPU and some extra oomph from the FSB/memory does help, but not nearly as much as, say going from a 9600GT to a GTX260. If he's into benching, then that'd be a good way to go to extract as much performance as possible. Gaming-wise though, and just the risk of failure and the extra cost of a good water cooling setup seem to be a waste if what he has is working good enough for him. I bet he'd notice more of a gaming improvement from the 2nd 4830 than the suggested Q8200/DDR1200/P45 @ 600FSB, not being rude, just stating what I've experienced on that aspect. Again if he was benching that'd be the way to go and get an even better proc, and more expensive WC setups. But a decent quad in the 2.4-3.6 range is more than enough for current games, I only lose about 1-3FPS in games at MOST going from 3.6GHz @ 400FSB to stock 2.4GHz @ 266FSB. But I lose quite a bit more then that going from a GTX260 to a 9600GT, or even going back to stock clocks on the GTX260.

Going for a more sturdy gaming rig, a decent air cooled, lightly OC'd (no more than 400FSB is really needed for a gaming rig in my experience that's even too much), it's cheaper, easy to maintain, doesn't run as hot, and still gets the job done quite well.

:toast:

RadeonX2 · Apr 23, 2009

How bout on my Commando? the chip is P965 which is older than P35 it supports Xfire but the 2nd card will be x4. or just buy a single powerful card will it still bottleneck having a PCI-E 1.1? I know PCI-E 2.0 @ x8 = PCI-E 1.1 @ x16 if I put a single GTX280 will I see a performance drop?

Mussels · Apr 23, 2009

RadeonX2 said:
How bout on my Commando? the chip is P965 which is older than P35 it supports Xfire but the 2nd card will be x4. or just buy a single powerful card will it still bottleneck having a PCI-E 1.1? I know PCI-E 2.0 @ x8 = PCI-E 1.1 @ x16 if I put a single GTX280 will I see a performance drop?

the P35 is 16x/4x PCI-E 1.1

If P965 is the same, it should behave the same as well.

erocker · Apr 23, 2009

BrooksyX said:
alright, i might pull the trigger tonight. I found a second card (exact same as mine) new in box for $70 shipped. Very tempted. Even though I have no problems running everything I currently have.

Just keep the monitor you have. 1680x1050 is nice on a 20.1" in terms of pixel pitch and picture quality.

RadeonX2 · Apr 23, 2009

hmmm I might give this Xfire a shot. I wish I bought a Radeon card so I can test Xfire and save money.

wolf2009 · Apr 23, 2009

you might want to look at these PCI-E 1.0 vs 2.0 CF benchmarks

http://alienbabeltech.com/main/?p=2249

I think they ran like 10-11 benchmarks

Mussels · Apr 23, 2009

wolf2009 said:
you might want to look at these PCI-E 1.0 vs 2.0 CF benchmarks

http://alienbabeltech.com/main/?p=2249

i ran tests myself, P35 vs x48... synthetics showed 10-15% difference, games showed next to none. And thats on 4870's, let alone his 4830's.

These benchmarks dont show very much difference.

From what i can tell "CFX3" is a 4870 x2 with a 4870 for tri-crossfire, and you can see the performance gain isnt that huge. Then again thats THREE 4870's, not two 4830's

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