CompatibilityPost Date: 2009-07-31 |
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zmank 
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Joined: 12 Jul 2009 Online Status: Offline Posts: 89 |
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 Topic: CompatibilityPosted: 31 Jul 2009 at 9:49am |
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I wanted to know for in the future if you could have 2 video cards of different types?
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justin.kerr
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Posted: 31 Jul 2009 at 9:52am |
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what do you mean by different types? different models? different manufacturers?
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zmank
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Posted: 31 Jul 2009 at 10:12am |
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Different models, like a Geforce 295 with a Geforce 275
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DST4ME
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Posted: 31 Jul 2009 at 11:35am |
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don't think you can do that.
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zmank
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Posted: 31 Jul 2009 at 11:42am |
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Okay thanks!
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justin.kerr
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Posted: 31 Jul 2009 at 12:13pm |
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wouldn't that make tri-sli? (3) 275's??
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Alex
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Posted: 31 Jul 2009 at 12:23pm |
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You can't, but, you could use the other graphics card for PhysX/CUDA, etc...
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justin.kerr
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Posted: 31 Jul 2009 at 12:27pm |
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?? you could. lol but would it lower the 295 to 275's output, or would it tri-sli??
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DST4ME
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Posted: 31 Jul 2009 at 1:28pm |
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no I think Alex means that you use the 275 for physx, won't tri sli.
Edited by DST4ME - 31 Jul 2009 at 1:28pm |
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lgm25c
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Posted: 31 Jul 2009 at 1:41pm |
If you mean use those cards together in SLI mode, no.
The manuf. can be different, but the GPU has to be the same.
Here's a part from Nvidia's site on SLI tech, and their "how-to" guide;
) Ensure that the second graphics card you plan to install:
Edited by lgm25c - 31 Jul 2009 at 1:43pm |
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justin.kerr
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Posted: 31 Jul 2009 at 1:41pm |
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YOU SURE?
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DST4ME
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Posted: 31 Jul 2009 at 3:39pm |
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I'm not sure, why you know something we don't? if so then spill it, whats all the questions about
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justin.kerr
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Posted: 31 Jul 2009 at 4:34pm |
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since it is just 3 275's it seems like it would work., maybe. My wife is starting her new build soon, ll have 295's, maybe I can swap one out with one of our spare 275's. lol
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DST4ME
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Posted: 31 Jul 2009 at 5:05pm |
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if you can check it and let us know, I'm thinking the a 295 is more of a 260+ then a 275 tho, otherwise 2 x 275 wouldn't outperform a single 295, I can also you tell you that you will get lot more folding with 2 x 275 then you do with the 295(sli disabled and each GPU folding separately)
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justin.kerr
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Posted: 31 Jul 2009 at 5:10pm |
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no no, a 295 is 2 275's slapped together, downside it produces more heat, so they down clocked the 295's to combat heat. The only reason 2 275's beat a 295 is because of the clock speeds. I guarantee that one of my wife's 295's will beat two stock 275's, or any factory OC'ed ones also. lol
Edited by justin.kerr - 31 Jul 2009 at 5:11pm |
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DST4ME
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Posted: 31 Jul 2009 at 5:13pm |
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so you oced the wifes 295, thats why it beats the 2 x 275
I don't know about it being 2 x 275 justin, other the cores (from the 280), everything else matches a 260+. Edited by DST4ME - 31 Jul 2009 at 5:16pm |
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justin.kerr
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Posted: 31 Jul 2009 at 5:26pm |
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No, the 275 hardware matches exactly the 295.. Thought this was well known info. lol
If we OCed a 295 to the same speeds as the 275, then a 295 and 2 275's would have the same graphic power, barring the 295 was on a PCIex16 slot
Edited by justin.kerr - 31 Jul 2009 at 5:28pm |
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DST4ME
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Posted: 31 Jul 2009 at 5:40pm |
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memory bandwidth and all match a 260
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justin.kerr
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Posted: 31 Jul 2009 at 5:42pm |
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like I said the hardware is 275, then they downclocked it for heat reasons.... |
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DST4ME
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Posted: 31 Jul 2009 at 5:52pm |
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but they down clocked to 260?
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justin.kerr
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Posted: 31 Jul 2009 at 6:02pm |
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ding ding we have a winner. lol
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DST4ME
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Posted: 31 Jul 2009 at 6:06pm |
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which hardware are you saying is 275?
all the reivews I saw when it came out, they all said it was a 280 core and the rest was 260. Edited by DST4ME - 31 Jul 2009 at 6:16pm |
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justin.kerr
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Posted: 31 Jul 2009 at 6:23pm |
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All of the hardware. lol 275 share the same hardware, as the 295 single PCB, the dual PCB had a Volterra voltage regulator, but the single has the same as the 275's
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DST4ME
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Posted: 31 Jul 2009 at 6:27pm |
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you got a link where I can see that info?
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justin.kerr
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Posted: 31 Jul 2009 at 6:49pm |
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I have the GPU's here, you can come over and look at all the chips, vrms, caps, ect and see for yourself.
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DST4ME
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Posted: 31 Jul 2009 at 6:53pm |
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lol well I believe you but I always like to see things for myself.
for me if it quacks like a duck and sounds like a duck its a duck, if it performs like a 260 then its a 260 as far as I'm concerned, even if it has a 275 hardware, its limitations are hindering its performance, so it might as well be 2 x 260. |
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justin.kerr
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Posted: 31 Jul 2009 at 7:12pm |
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not with 240 shaders, remember the big increase the 260 received when it went from 192 to 216? upping to 240 helps a lot, plus with the same chip, and mem, the 295 can clock the same as 275's, as long as you can cool them. I just wish they would have left the Volterra voltage regulator on the single PCB ones, that made for easy voltage adjustments.
 So those could actually clock higher than the 275's, ohh well, she better be happy with 2 fairly high OCed 295's. 
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DST4ME
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Posted: 31 Jul 2009 at 7:49pm |
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Yes 240 helps but even stock with that, it does not perform as well as stock 275, it performs like 2 x 260 stock.
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justin.kerr
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Posted: 31 Jul 2009 at 8:44pm |
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that is because the mem,shader,core clocks are down clocked.
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DST4ME
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Posted: 31 Jul 2009 at 8:56pm |
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but most people don't mess with voltages and stuff and use them stock, besides it is because of heat that they are down clocked, bottom line is that in performance stock 295 perfoms like a 260 cause its matches a 260 settings down to the mem bandwidth, I don't see why they would downclock the bandwidth to a 260, some of it makes no sense.
but at the end of the day, for whatever reason, stock you get 2 x 260. |
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justin.kerr
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Posted: 31 Jul 2009 at 9:09pm |
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a bit more than 2 260s, with the added shaders, but not 2 275's because of the slower clocks.
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venom
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Posted: 01 Aug 2009 at 12:04am |
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Stock 295 might _perform_ like 2x260s, but the actual hardware (not clocks) are 2x275.
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