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8800gtx --> 2x4850 @ P35 ?

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June 23, 2008 1:17:45 PM

Hello. Neither guru3d nor tomshardware have put 4850 in CF in their vga charts yet, and no review I've found via google have compared a single 8800gtx to two of the new discount cards. How much would my performance improve when running stuff on a 22" monitor? Is it even a viable option, given my ga-p35-ds4 rev1.0 is only 8x pcie on the second slot ? I remember reading an article concluding that 8x would be enough bandwidth - but that was testing with an 8800 ultra or something.
And can I still use dual monitors with a cf configuration? (22" primary, 19" secondary)

Quick pc specs:
2x2pc2-6400c5
gigabyte P35 DS4 board
E6600 @380x9 (3420mhz)
8800gtx @ stock
corsair hx620
3x sata hd

More about : 8800gtx 2x4850 p35

a c 169 U Graphics card
June 23, 2008 3:20:42 PM

Hello and welcome to the forums mate :) 

Well i have a config very similar to yours:

Core2Duo E6600@3.2
ASUS P5KE- WIFI
SEAGATE BARRACUDA 500GB 16MB
OCZ VINDICATOR CPU COOLER
OCZ 4GB REAPER DDR2 800 4-4-4-15
OCZ 8800GTX @612/1080(=8800ULTRA)
OCZ PROXSTREAM 1000WAT
THERMALTAKE ARMOR CASE
LG M228WA MONITOR
XP 32 + SP3 RC1


And i have no problems with any games, i can max out every game even Crysis (i play it @ Ultra high with Triple C hack @ 1680x1050 0xAA and i get 20-30 FPS mostly)

So i say keep your 8800GTX, its a solid card

Also if u want to go with 2 HD 4850, u will have a problem:
http://www.tomshardware.co.uk/forum/245454-15-crossfire...

A note about Motherboards:

Some Motherboards support Multi-GPU Technology at Dual 16x mode, some support it at Dual 8x mode and some support it at 16x 4x mode, what are the differences?
Well for getting the best performance out of Multi-GPU cards,you need a Motherboard that supports Multi-GPU at dual(Or more) 16x mode like Nvidia 790i ULTRA SLI, Nvidia790i SLI, Nvidia 780i SLI, Nvidia 680i( As i said, NVIDIA 790i ULTRA SLI ,790i SLI ,780i SLI and 680i SLI support 3-Way SLI too),Nvidia 590i SLI, Nvidia nForce4 SLI 16x, ATI CrossFire Xpress 3200 or Intel X38 chipsets.

Dual 8x is a very good configuration too,it doesnt have alot of difference with Dual 16x and its cheaper too.
Chipests like Nvidia 750i SLI, Nvidia 650i SLI,NVIDIA 570i SLI, NVIDIA nForce4 SLI, ATI Radeon Xpress 200, Intel 975x and ONLY 2 Intel P35 boards(ASUS BLITZ FORMULA and ASUS BLITZ EXTREME) support Multi-GPU at dual 8x mode.

However,there are some expections too,for example EVGA has a 750i Motherboard(The model of it is
EVGA 750i SLI FTW)Which supports SLI at dual 16x mode unlike many 750i Motherboards which support SLI at dual 8x mode.

The last one is 16x 4x, this one is the weakest and doesn't perform very good compared to dual 8x or dual 16x,so i won't recommend it for Multi-GPU configuration. Intel P35 and P965 chipsets support Multi-GPU at
16x 4x mode.
a c 275 U Graphics card
June 23, 2008 3:28:21 PM

The 8800GTX is a very good card. For an upgrade to be significantly better, you need to jump a couple of levels in card power.

Would crossfire 4850 be significant? I don't know. Multiple vga cards will help some games, and not others. Look for tests of other similar cards in crossfire for the games you play. It will also be diferent for different resolutions. Crossfire/sli apply the vga power to only one monitor, so you will need to add a pci vga card to get the second monitor working.

I think I would look for a single GTX260 or better. You can then hang your second monitor off of that. A second cheap vga card for the second monitor is also an option to free up resources for your primary gaming monitor.
June 23, 2008 3:37:00 PM

2 4850s would be significant, but not on that motherboard the new cards REALLY almost require x16/x16. I recommend holding your cash until the 4870 or 4870 X2.
June 23, 2008 4:09:50 PM

The_Blood_Raven said:
2 4850s would be significant, but not on that motherboard the new cards REALLY almost require x16/x16. I recommend holding your cash until the 4870 or 4870 X2.


Pure FUD, PCI-E 2.0 at 8x is MORE than enough bandwith for any card.

If its PCI-E 1.1, 8x MIGHT start to bottleneck, but even then it would probably only be the GTX280 or a 4870x2 that could fill them up.

http://www.tomshardware.com/reviews/pci-express-2-0,1915-10.html <--Tom's review of PCI2.0 bandwidth needs.

EDIT: I realized I pretty much avoided the actual topic of the thread, and 16x + 4x 1.1 from the P35 is not going to do justice to a Crossfire setup.
June 23, 2008 4:35:43 PM

Anandtech.com has benchmarks of the 4850 in CF..check it out
June 23, 2008 5:52:48 PM

Okay, so if I add another card to my motherboard the second one would run x4 ? I thought x8 - but didn't actually check the specs. I really thought to remember the second slot on a p35 was x8 ..... and if indeed only asus provides a p35 board with that capability, I'd rather avoid it altogether. I don't want an asus board ever again. Unless ecs is the alternative, and even then I'm not sure I'd pick asus.

Anyhow, back on topic - my concerns weren't about finding 4850 cf scores, but a place that has both scores of that, and of an 8800gtx - and that I couldn't find. It's pretty useless to have a base score of a cf setup, if I don't have anything to compare it to.

In any event - if I have to switch motherboard to get cf working properly, I'll just have to wait till ati or nvidia release some gx2/x2 variant for reasonable enough a price.

ps. @ the guy running crysis - I don't believe you. If I'm to run crysis at very high I'm running it at 1280x720 with 2xaa - running at 1680x1050 at very high won't do, and running at medium or a mix of medium to very high is an unreasonable compromise. Anyhow, I'm looking ahead, and I want to make sure my system can handle farcry 2 when it's released. So I have to upgrade - and that means an ati cf configuration or a monster nvidia card (as I want to stay with intel chipsets ; most reliable since i815)
June 23, 2008 5:55:25 PM

btw @ crysis guy too : I'm running with a tr120 extreme (with 2 120mm arctic fan 12) in a custom desktop chassis ; only my memory modules prevent me from getting higher clocks - and I just replaced the kvr ddr2-667 modules with geil's black dragon ones, so I expect to get to 3,6ghz once I tire with wow - and I'll still no be able to run crysis at 1680 with that
a c 169 U Graphics card
June 23, 2008 6:38:44 PM

lol if u read the forum a bit, u will see that i have done it and i have posted the pics too

here are some screenshots:







CRYSIS @ 1680x1050 with 0xAA and everything @ ULTRA HIGH QUALITY (With Triple C Hack) with Nvidia 169.21 driver

I am trying to help u here mate
!