SLI / CrossFire FAQs - Page 7
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Last response: in Graphics & Displays
meodowla
December 22, 2008 3:58:00 PM
Edit:Read this
http://forums.guru3d.com/showthread.php?t=281801
http://forums.guru3d.com/showthread.php?t=281801
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Reply to Maziar
Related resources
- SLI / CrossFire FAQs - Forum
- CrossFire FAQs - Forum
- crossfire-faqs - Forum
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meodowla
December 23, 2008 9:56:36 AM
From Guru3D Forum:
This driver will help do it possible:
http://www.donotargue.com/dna_hybrid/DNA-ATi-Hybrid_Vis...
This driver will help do it possible:
http://www.donotargue.com/dna_hybrid/DNA-ATi-Hybrid_Vis...
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Reply to meodowla
meodowla
December 23, 2008 9:59:35 AM
Decibel
December 26, 2008 3:20:57 PM
hello Maziar..
Thanks for all the info on crossfire..very insightful.....I was having problem myself to understand how to get most from my mobo crossfire potential... I need your help to find a good but not very expensive video card from my Asus P5Q Pro...it seems to me you really know this stuff...I have BFG 8400 GS, but i would really upgrade it to something more powerful for my gaming experience....I have a dual CPU, 2GB memory ram ddr2, 300GB hard disk.
Thanks Maz...I appreciate..Decibel
Thanks for all the info on crossfire..very insightful.....I was having problem myself to understand how to get most from my mobo crossfire potential... I need your help to find a good but not very expensive video card from my Asus P5Q Pro...it seems to me you really know this stuff...I have BFG 8400 GS, but i would really upgrade it to something more powerful for my gaming experience....I have a dual CPU, 2GB memory ram ddr2, 300GB hard disk.
Thanks Maz...I appreciate..Decibel
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Reply to Decibel
Hello mate
glad you found this useful
Well asking about which card to get is in this thread:
http://www.tomshardware.com/forum/169937-33-short-list-...
glad you found this useful
Well asking about which card to get is in this thread:
http://www.tomshardware.com/forum/169937-33-short-list-...
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Reply to Maziar
Decibel
December 26, 2008 8:14:39 PM
hey thanks....you would not believe but i am registered on that forum!
...Good eh!! But i would like to have your opinion, what you think i should do!!!!Because you mentioned few of the Asus mobos previously, i was wondering if you could gave me an hint of which graphic card would do good on my pc....
i appreciate Maz....Thanks for the heads up about tom hardwareweb.....
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Reply to Decibel
OMGiTzzFATAL
January 9, 2009 9:17:21 AM
Hi, i have a question:
im looking to go crossfire with 2xHD4870's, i already have one at the moment and im looking to get another one, my current card is 512MB, and im going to get another 512MB card. Will i see any performance gain if a game wants more than 512MB of memory? (am i write in thinking that the memory from both cards will NOT be combined ?)
Ive looked on some benchmarks and ive seen that the 1gb card does better than the 512MB card when the game wants more than 512MB's, also when the resolution is high and theres AA and AF enabled.
I have a second question:
If i get the 1GB version and use it with my current 512MB card in crossfire, and use the 1gb card as the primary card will my memory be 1GB?, or will it go down to 512mb?
please help im so confussed >.<
P.S i game @ 1920x1080
im looking to go crossfire with 2xHD4870's, i already have one at the moment and im looking to get another one, my current card is 512MB, and im going to get another 512MB card. Will i see any performance gain if a game wants more than 512MB of memory? (am i write in thinking that the memory from both cards will NOT be combined ?)
Ive looked on some benchmarks and ive seen that the 1gb card does better than the 512MB card when the game wants more than 512MB's, also when the resolution is high and theres AA and AF enabled.
I have a second question:
If i get the 1GB version and use it with my current 512MB card in crossfire, and use the 1gb card as the primary card will my memory be 1GB?, or will it go down to 512mb?
please help im so confussed >.<
P.S i game @ 1920x1080
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Reply to OMGiTzzFATAL
to decibel:
I dont know your budget but an ATI HD 4850/4870 would be good for you.
to OMG:
Hello mate
Well first of all,the difference between 1GB cards and 512MB cards aren't much son don't worry much about it.also when you combine 2 HD 4870s cards which both have 512MB memory,you still will have 512MB memory,as multiGPU won't double the memory.
About mixing a 512MB 4870 with a 1GB 4870 ,read this thread:
http://forums.guru3d.com/showthread.php?p=2935216
5. What happens when graphics cards with varying memory speeds and engine clocks are paired together?
A. In this scenario, overall performance will be adjusted to match the memory speeds and engine clocks of the lower clocked card. To obtain ideal performance, graphics cards should be paired correctly.
If u alreayd haven't purchased your VGAs,go for 1 HD 4870X2 instead,because it has an overall better performance,i myself have the same monitor like you and went for HD 4870X2,because its basically 2 HD 4870's on one card but it produces less heat,requires one slot and has better performance in some cases.
I dont know your budget but an ATI HD 4850/4870 would be good for you.
to OMG:
Hello mate
Well first of all,the difference between 1GB cards and 512MB cards aren't much son don't worry much about it.also when you combine 2 HD 4870s cards which both have 512MB memory,you still will have 512MB memory,as multiGPU won't double the memory.
About mixing a 512MB 4870 with a 1GB 4870 ,read this thread:
http://forums.guru3d.com/showthread.php?p=2935216
5. What happens when graphics cards with varying memory speeds and engine clocks are paired together?
A. In this scenario, overall performance will be adjusted to match the memory speeds and engine clocks of the lower clocked card. To obtain ideal performance, graphics cards should be paired correctly.
If u alreayd haven't purchased your VGAs,go for 1 HD 4870X2 instead,because it has an overall better performance,i myself have the same monitor like you and went for HD 4870X2,because its basically 2 HD 4870's on one card but it produces less heat,requires one slot and has better performance in some cases.
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Reply to Maziar
OMGiTzzFATAL
January 9, 2009 6:30:45 PM
OMGiTzzFATAL
January 9, 2009 6:39:26 PM
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Reply to OMGiTzzFATAL
OMGiTzzFATAL
January 9, 2009 7:18:39 PM
OMGiTzzFATAL
January 9, 2009 7:40:03 PM
yeah ive got 8.12
well i can play fallout 3 with al the bells and whistles (8xAA and 15xAF samples).
urrr obviously crysis kills my hole system
GRID i ran play on max with everyytihing on.
COD4 i can play on max with AA and AF max @ 1920x1080
it seems to be the newer, more demanding games that my card doesnt handle well.
well i can play fallout 3 with al the bells and whistles (8xAA and 15xAF samples).
urrr obviously crysis kills my hole system
GRID i ran play on max with everyytihing on.
COD4 i can play on max with AA and AF max @ 1920x1080
it seems to be the newer, more demanding games that my card doesnt handle well.
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Reply to OMGiTzzFATAL
If you dont have problems with GRID and COD4,then there isnt a problem with your card,your card is a solid card who says your card can't handle games with it? about Crysis,its strange,however adding AA with 1920x1080 resolution won't make alot of difference since it doesn't have noticeable jaggies.
I tested it myself.
I tested it myself.
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Reply to Maziar
OMGiTzzFATAL
January 10, 2009 8:06:56 AM
1_Yes you will get a decent boost in FPS,since you play at a high resolution.but i again say this:90% of games won't need AA for 1920x1080 resolution,because you won't see a lot of jaggies.
2_I answered you
if you crossfire a HD 4870 512MB with a HD 4870 1GB,you will have 512MB still,read my postes above.
2_I answered you
if you crossfire a HD 4870 512MB with a HD 4870 1GB,you will have 512MB still,read my postes above. -
Reply to Maziar
meodowla
January 11, 2009 7:46:48 PM
meodowla
January 11, 2009 7:49:41 PM
For crossfire it would only use the first 512MB's of memory. The card would still have all the ram, but not be able to use it
In crossfire BOTH cards always hold the same textures and information. As such it will have to go with the memory of the lowest card(512). If the card was on its own it would have both.
In crossfire BOTH cards always hold the same textures and information. As such it will have to go with the memory of the lowest card(512). If the card was on its own it would have both.
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Reply to nukemaster
terr281
January 13, 2009 7:58:43 PM
(Sorry if this is mentioned earlier, but this post is extremely long.)
Notes:
1. I would distinguish between the 680i and the 680i lt MB, in regard to the 3-way SLI and duel x16 lanes. The 680i lt has 2 PCI-E x16 slots, so it can't 3-way SLI...but does have the duel x16 lanes.
2. You may or may not want to include a note regarding 8800 GT and 9800 GT video cards being "the same," and thus being able to SLI them together. (I know the difference is in the BIOS... and the manufacturing process of "new" 9800 GTs...thus Hybridpower support.) For the common user, they can't be SLI'ed together. However, if someone wants to risk flashing the bios of one of the cards, they can be SLI'ed. (I am not one of those people to risk it though.)
3. You may want to include a note regarding PCI-E 1.0/1.1/2.0 as well.
Notes:
1. I would distinguish between the 680i and the 680i lt MB, in regard to the 3-way SLI and duel x16 lanes. The 680i lt has 2 PCI-E x16 slots, so it can't 3-way SLI...but does have the duel x16 lanes.
2. You may or may not want to include a note regarding 8800 GT and 9800 GT video cards being "the same," and thus being able to SLI them together. (I know the difference is in the BIOS... and the manufacturing process of "new" 9800 GTs...thus Hybridpower support.) For the common user, they can't be SLI'ed together. However, if someone wants to risk flashing the bios of one of the cards, they can be SLI'ed. (I am not one of those people to risk it though.)
3. You may want to include a note regarding PCI-E 1.0/1.1/2.0 as well.
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Reply to terr281
This things that you mentioned are mostly for motherboards but i will add some of them.
1_That was necessary i added it,thanks
2_You can't SLI a 8800GT with 9800GT,but with hacking its other story,you can do many things with hacking but its not recommended and it may hurt the cards too.
3_Thats not very related to SLI/CrossFire, about motherboards,i mention which chipset support MultiGPU and in which ways and things like this,my main focus is on MultiGPU technology and VGA cards not on motherboards.
However thanks alot mate
1_That was necessary i added it,thanks
2_You can't SLI a 8800GT with 9800GT,but with hacking its other story,you can do many things with hacking but its not recommended and it may hurt the cards too.
3_Thats not very related to SLI/CrossFire, about motherboards,i mention which chipset support MultiGPU and in which ways and things like this,my main focus is on MultiGPU technology and VGA cards not on motherboards.
However thanks alot mate
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Reply to Maziar
black_storm
January 14, 2009 3:39:32 PM
black_storm
January 14, 2009 8:43:18 PM
black_storm
January 15, 2009 3:30:57 PM
nerdic
January 20, 2009 2:47:09 PM
black_storm said:
Hi;Can I use this card as SLİ ? because this card's fan is very big. ?
(SPARKLE CALIBRE 9600GT 512MB 256Bit)
http://img.donanimhaber.com/upfiles/185897/6D6C62761DED419CBF9AD5468846C5D0.jpg
damn thats a handsome card
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Reply to nerdic
InfoNex
January 21, 2009 12:31:57 AM
radeonman
January 23, 2009 5:13:51 PM
sorry for such a noob question but here go;s : i have a 3870x2 -1gig-512 card and was wondering if i could xfire it with a cheaper 3870-512-256 card for a boost ? or will the x2 then lower itself to the 256 mb card ? if i understand the guide correctly then the bigger card will lower itself down to the smaller card ? just need to clarify before i buy a smaller card instead of buying another 3870x2 and then xfire them . also , how stable is sli and xfire ? been browsing ati site and a lot of people seem to be having problems putting 2 or 3 cards together .
once again sorry if i am probably answering my own question but just not realising it .
radeonman .
once again sorry if i am probably answering my own question but just not realising it .
radeonman .
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Reply to radeonman
radeonman
January 26, 2009 4:30:57 AM
thanks maziar ,
i think maybe a better thing would be to just get a 2g card and save myself the hassle . seems a lot of folks have trouble getting their xfire/sli setups working easily although i can see the benifit it does present with maybe 2 x medium range cards .
thanks for your help again .
may i inquire about your 4870x2 card ? im not sure wether i should go for the new 295 from nvidia or get a 4870x2 - i like the fact that the 4870 seems to be a full 2g card although many folks have told me to wait until nvidia comes up with its own version of a full 2g card . im sure with such feirce competition the price's will drop on the 4870x2 as they are still darn expensive here in south africa .
radeonman .
i think maybe a better thing would be to just get a 2g card and save myself the hassle . seems a lot of folks have trouble getting their xfire/sli setups working easily although i can see the benifit it does present with maybe 2 x medium range cards .
thanks for your help again .
may i inquire about your 4870x2 card ? im not sure wether i should go for the new 295 from nvidia or get a 4870x2 - i like the fact that the 4870 seems to be a full 2g card although many folks have told me to wait until nvidia comes up with its own version of a full 2g card . im sure with such feirce competition the price's will drop on the 4870x2 as they are still darn expensive here in south africa .
radeonman .
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Reply to radeonman
Well it depends on what resolution you play too.
For me i am happy with my HD 4870X2s performance,this card and GTX 295 are very good cards,in some games the HD takes the lead and in some games GTX 295 has a lead,if you want to wait,you can't ever buy anything.
Also if you are satisfied with your current card,then there is no need to upgrade.Upgrade something when you really dont get the performance you need.
For me i am happy with my HD 4870X2s performance,this card and GTX 295 are very good cards,in some games the HD takes the lead and in some games GTX 295 has a lead,if you want to wait,you can't ever buy anything.
Also if you are satisfied with your current card,then there is no need to upgrade.Upgrade something when you really dont get the performance you need.
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Reply to Maziar
tomasf
February 5, 2009 2:57:53 PM
tomasf
February 5, 2009 4:18:46 PM
tomasf
February 5, 2009 6:53:14 PM
tomasf
February 6, 2009 9:57:32 AM
meodowla
February 6, 2009 3:57:44 PM
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Reply to Maziar
meodowla
February 8, 2009 3:05:10 PM
meodowla
February 8, 2009 3:41:17 PM
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