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Old October 10, 2007, 11:57 PM
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Default HD 2600XT Crossfire vs HD2900XT

Could anyone tell me which setup would give me better performance?

2X 2600xt 256mb gddr3 crossfire
or
1X 2900xt 500mb gddr3

someone told me there is a stability issues with crossfire/sli, is it true and is there any other issues with cf/sli that i should be aware of? I would be using asus P5K-E/WIFI-AP or asus P5K-DELUXE/WIFI-AP in my rig

Thanks in advance
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Old October 11, 2007, 12:19 AM
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With those motherboards your crossfire is going to cut you down to 4x in the second PCI-E x16 lane unlike SLI 32 that would give you true 16x times in each lane. If you are an ATI then I would get the single 2900XT 512 but you may want to get an NVIDIA GeForce 8800 GTS 640MB

Sapphire Radeon HD 2900XT 740MHZ 512MB 1650MHZ GDDR3 Dual DVI-I HDCP VIVO Video Card - $479.99

EVGA E-GEFORCE 8800GTS 500MHZ 640MB 1.6GHZ GDDR3 Dual DVI-I HDTV Out HDCP DIRECTX10 Video Card - $385.99

The 2900 XT does not compare to the 8800 GTS 640MB. By getting the 8800 GTS 640 MB you are saving almost $100.00

You can do a comparison here. VGA Charts 2007 | Tom's Hardware
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Last edited by BALISTX; October 11, 2007 at 12:21 AM.
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Old October 11, 2007, 04:27 AM
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I agree- as a rule, I would ususally recommend goin with the fastest card you can afford rather than two slower cards- often the single faster one will perform at least as well- then later you can twin that card when you can afford it and the price goes down.
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Old October 11, 2007, 08:40 AM
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I cant afford a $400 card, that is why i was thinking about going with 2 2600xt, which i can get for around 120 canadian each. i dont mind crossfire or sli, its just that the motherboard i looked at is crossfire certified?

is there a motherboard that has 2 pci-e X16 for crossfire that doesnt cost $300 with p35 chipset or equivalent? i dont mind a sli based motherboard as well. could anyone please explain the difference between sli certified psu and a normal one that comes with 2X PSI-e?

I talked with a guy at best buy and he said that a crossfire/sli setups have stability issues, would anyone clear that to me please:help:......

thank you all for your help......
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Old October 11, 2007, 08:56 AM
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I don't know of any stability issues. There currently is not a Crossfire board that is 2 x16 for the P35 chipset. SLI certified just basically means the company has paid to get NVIDIA to certify their PSU. They have tested the PSU and it can run SLI without any issues. You don't need an SLI certified PSU to run SLI. Corsair makes excellent PSUs and I would recommend the CMPSU-620HX 620W.

Are you going to be running Vista and playing DX10 games. For around $150 you can get a Radeon X1950 pro and that will smoke two 2600XT's It's not a DX10 based card but it will still run on Vista and play a lot of the current games. Not to mention the X1950 Pro is 256-bit for the memory and the 2600XT is only 128-bit memory.
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Old October 11, 2007, 10:35 AM
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xFire/SLI are overrated and not needed and are only wanted for braggin' rights.

Just get one fast card and you'll be satisfied.
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Old October 11, 2007, 10:46 AM
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For HD 2600 XT Crossfire, 16X/4X will not be an issue and they will both deliver their full performance. HD2900's would still only lose about 5-10% tops from one card running 4X. That is a crock of BS that you need full 16X lanes, even for 8800 ULTRA SLI.

As for performance, the HD2900 is faster than the 8800 GTS. I have had both. The HD 2900 is definitely faster. I would not sell a GTS to get a HD 2900, but if I was gonna spend the $$$ again I'd go with the better HD 2900 every time.

Tom's Hardware is not a site to use as a bible. It is a good resource for comparison, but many of their tests are flawed and just cannot be used as the only source.

If you have to have a solution now, I'd get HD2600 XT Crossfire if I was gonna spend the $$$ the way you are. Otherwise, a whole new crop of midrange cards are coming in the next few months. I would most definitely avoid the 8600 cards since they are utter crap for the price. Depending on the resolutions, a single X1950 PRO is a great choice. Higher resolutions are where Crossfire shines. If you play @ 1280X1024 or lower, you don't need dual cards of any kind since you are putting the strain on the CPU much more than the GPU.

What resolution is your monitor? What games do you play? What's your OS?
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Old October 11, 2007, 01:47 PM
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balistx: thanks for clearing the cf/sli stability and the sli certified psu question i had. just as an information, there are crossfire motherboards with 2X pci-e, i only know of asus ones, they r under "gaming" boards. also, i will take a look at the psu u recommended. i am already running vista ultimate and i am planning on running "crysis" so thats y i am looking at DX10 cards

b1lk1: I am currently running vista ult at 1280X1024 res and i want to play bioshock and crysis, which is coming out next month. i can wait till new year if i would get better card for the same price. if u had 2900, could u tell me if a 2600xt crosfire would out perform it, even if i were to wait till new year, this is something i would like to add to my knowledge. from what u said i dont think i need dual setup. also, where can i find some info on the new cards u were talking about? thanks


I am trying to build a gaming rig under $1000. currently my list has intel quad 6600, asus p5k e, 2gig ocz ddr2-800, hd 2600xt and 600w psu, costing me around $830.

and to everyone who replied, thanks guys

Last edited by kING4000; October 11, 2007 at 02:27 PM.
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Old October 11, 2007, 04:35 PM
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You want this card:

Canada Computers - Video Cards > PCI-Express Cards > Powered By ATI : Sapphire ATI RADEON HD 2900 Pro 512MB GDDR4 Dual Dual-Link DVI HD Audio Shader Model 4.0 320 Unified Shaders PCI-Express Graphics Card.

Might be slightly over your budget, but it will easily outperform HD 2600 XT Crossfire.
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Old October 11, 2007, 05:35 PM
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Thank you all. Much appreciate the help.

This is an offtopic question, but does NCIX/directcanada charge tax?
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