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Can a 9800 GTX sli with a 9800 GTX+ ?

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Howdy...Happy thanksgiving! :bounce: Just got my 9800 GTX's I ordered from newegg ( refurb) and one was DOA. I got return auth. and got to looking on the web and found our local Fry's had them in stock...so I headed off to buy one. After looking at them in the store it looks like the ones that I got from newegg are gtx+ 's....huge case ..but they are marked GTX's. So to replace the DOA one I got a GTX+. Just in case IM wrong, and these really are just gtx's... can I sli the gtx with the gtx+ ?
Thanks! Tim

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The GTX+ was only a die-shrink enabling higher clocks if i remember correctly. You should plug the GTX into the first PCIe1 and the GTX+ into PCIe2 so the faster card gets clocked down to GTX level. While i don't know for a fact that it works, i do think it should work.

Reply to Slobogob

Slobogob wrote :

The GTX+ was only a die-shrink enabling higher clocks if i remember correctly. You should plug the GTX into the first PCIe1 and the GTX+ into PCIe2 so the faster card gets clocked down to GTX level. While i don't know for a fact that it works, i do think it should work.



I believe thats with ATi cards, unsure about nvidia cards tho, wait for a pro to comment on this one ;)

Reply to apache_lives

apache_lives wrote :

I believe thats with ATi cards, unsure about nvidia cards tho, wait for a pro to comment on this one ;)


I just took a short look at the nvidia page and they simply lack a chart with cards that are compatible. The only thing i found was a list with cards that can do sli.

Reply to Slobogob
- 0 +

well if youve already got both cards, try it and let us know if it works, GTX in slot 1, GTX+ in slot 2.

Reply to Flakes

Thanks! OK... Newbie SLI 101 question... which slot is #1 and which is #2 ? :pt1cable:

Reply to cessnac182golf

cessnac182golf wrote :

Thanks! OK... Newbie SLI 101 question... which slot is #1 and which is #2 ? :pt1cable:



first slot it always the highest/closest to the cpu

i dont see why either slot would matter ie why one card should go in first slot when they supposed to be matching cards etc

Reply to apache_lives
- 0 +

100% yeppers it will work!

slot #1 is the one closest to the northbridge... (dont ask what the northbridge or i will go emo :lol:) and the second is the one closest again to that...

a question that may sound stupid, do you actually have an sli mobo or..

Reply to V3NOM

Thanks! Naturally I have them in backwards right now...so ...... back on goes the anti static strap! :D Thanks! Tim

Reply to cessnac182golf

Quote :

a question that may sound stupid, do you actually have an sli mobo or..


:lol: If he comes back with an "I only have 1 brown slot" I'm going to crap myself...

I've read on other sites that this method is exactly how you do it, so the 2nd card will downclock itself as needed, and it should work with no problem.
Hope he post back to verify...


Message edited by codaciousbodacious on 11-29-2008 at 12:37:57 PM
Reply to codaciousbodacious

Thanks everyone.........up and running great..... but :cry: I still would like to be able to see some even faster frame rates with FSX... or at least be able to set the traffic sliders all the way to the right with medium high on everything else. Heard the Q6600 overclocks well. Wonder if I took it up to 3.0 ( sounds like a piece of cake after reading the how to... GULP ... :o ) if it would help.
Thanks!! Tim

Reply to cessnac182golf
- 0 +

you have both cards in but is SLI enabled? there are 3 different rendering modes to choose from as well. you might see which one works best on the games you play most.

Reply to roofus

Yes there is sli mode. 3 renderings.... are you talking about the performance settings...ie quality, bal, and perf? I also did some tests this morning on my system....I still have a funny feeling about the one of the 2 9800 GTX's that I got from newegg...the first one being DOA.....and now I have figured out that this re-certif. 9800 GTX is really a down clocked + . That is why it is the same size as the new 9800GTX+ that I purchased. I installed each one by itself again and noted frame rates on FSX in the same test zone i picked. The real wierd thing is that the frame rates were higher with the lower clocked re-furb card than the new + card. And I also tried my 2 9600GT's sli ( was packing these to sell to a forum member and thought I would give them a test) and they are just as fast as the sli'd 9800 GTX re-furb in slot one and the new GTX+ in slot 2 sli'd. Maybe they are having a hard time sli ing together. How do you tell?
Tried crysis and all run it flat out. What should I use as a test? Nvidia has a bunch of download demos. Thanks! Tim

Reply to cessnac182golf
- 0 +

FSX is a poor graphics benchmarking tool! It is very dependant on the CPU, Even super-fast cards can give poor framerates if paired with a less than potent CPU.
Crysis has been well optomised for Nvidia hardware and seems to work well with SLI, what other new(er) games do you have to test with?

Reply to coozie7
- 0 +

2 Different GPUs it won't work. From all my experiences :)

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Reply to L1qu1d

cessnac182golf wrote :

Yes there is sli mode. 3 renderings.... are you talking about the performance settings...ie quality, bal, and perf? I also did some tests this morning on my system....I still have a funny feeling about the one of the 2 9800 GTX's that I got from newegg...the first one being DOA.....and now I have figured out that this re-certif. 9800 GTX is really a down clocked + . That is why it is the same size as the new 9800GTX+ that I purchased. I installed each one by itself again and noted frame rates on FSX in the same test zone i picked. The real wierd thing is that the frame rates were higher with the lower clocked re-furb card than the new + card. And I also tried my 2 9600GT's sli ( was packing these to sell to a forum member and thought I would give them a test) and they are just as fast as the sli'd 9800 GTX re-furb in slot one and the new GTX+ in slot 2 sli'd. Maybe they are having a hard time sli ing together. How do you tell?
Tried crysis and all run it flat out. What should I use as a test? Nvidia has a bunch of download demos. Thanks! Tim



Matched cards are the best bet

Nvidia 9800GTX and 9800GTX+ - my shop has seen a pathetic 50% sucess rate after even a week, if that - stopped ordering large ammounts because of it, from both ASUS and MSI, good one nivida.

8800GT/GTS512/9600GT/9800GTX etc - all esentially the same cards, dont expect leaps from any of em, and your cpu may limit you eg hit a point where you gain no performance hence why 9600 SLI vs 9800 SLI appears to have no gain - you double your video card memory/performance, your not doubling your sytem eg CPU, RAM, fsb bottleknecks, etc - why i dont see SLI and an option, not worth it.

Reply to apache_lives

Thanks! I agree with you........ no leaps for sure. Wish I had got the faster quad chip. Going to try to take my q6600 to 3.0. I have great cooling and am adding more. Thanks everyone again! Tim :pt1cable:

Reply to cessnac182golf

cessnac182golf wrote :

Thanks! I agree with you........ no leaps for sure. Wish I had got the faster quad chip. Going to try to take my q6600 to 3.0. I have great cooling and am adding more. Thanks everyone again! Tim :pt1cable:



i got my Q6600 G0 @ 3.5ghz - even at 3ghz is still plenty of power and will definitly help performance etc - go for it!

Reply to apache_lives
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