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#1
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SLI 7800GT or 1x 7900GT?
Ok, so it appears that the 7900GT will cost a little bit more than a 7800GT
costs right now (vendors depending, of course, and this in Australia where everything is a little more expensive video-card wise). If the 7900GT slightly exceeds the base clocks of a 7800GTX (450/1320 vs. 450/1250), I'm assuming 2x 7800GT (in SLI) will outperform a single 7900GT. Um...is this right? Essentially - should I go ahead and buy a second 7800GT (leadtex extreme 450/1050)? Or wait and buy a single 7900GT? I think this might turn out to be a very, very stupid question...but I need reassurance! |
#2
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SLI 7800GT or 1x 7900GT?
personally, i would drop in a second 7800, but thats until i see any reviews
of the new ones. power consumption is supposed to be less on the new card. they are out today, so shouldnt be long before the likes of anandtech have them dissected, then you will be able to make a more informed choice. |
#3
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SLI 7800GT or 1x 7900GT?
If you google .. there's a 1Kwatt psupply out there just
for the nVidia cards. I think it is only $600, and comes with a dozen eggs. johns |
#4
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SLI 7800GT or 1x 7900GT?
A lot of great choices.
Hmmm I'm not as confident about SLI yet so I'd probably find a buyer for your current 7800GT or give it to a friend and buy one 7900 GTX but then I realize that is a more pricey option and one 7900 GTX isn't going to give much more performance than two 7800 GTs I suppose. Of course, that fluctuates game-to-game. Did you see the review/comparison he http://enthusiast.hardocp.com/articl...ZW50aHVzaWFzdA They actually show a lot about the exact situations you are thinking about! -- Scotter Tyan Thunder K8WE Dual Opteron 252s (2.6ghz) 4 gig Corsair XMS DDR400 RAM XFX 7800 GTX 256 w/VGAsilencerV3 500 gig Hitachi SATA 300 160 gig Seagate SATA 150 Dual Dell 24" wide aspect LCDs 550W Antec power supply X-Fi Platinum Soundblaster - "DC" dragoncarer@woops wrote in message ... Ok, so it appears that the 7900GT will cost a little bit more than a 7800GT costs right now (vendors depending, of course, and this in Australia where everything is a little more expensive video-card wise). If the 7900GT slightly exceeds the base clocks of a 7800GTX (450/1320 vs. 450/1250), I'm assuming 2x 7800GT (in SLI) will outperform a single 7900GT. Um...is this right? Essentially - should I go ahead and buy a second 7800GT (leadtex extreme 450/1050)? Or wait and buy a single 7900GT? I think this might turn out to be a very, very stupid question...but I need reassurance! |
#5
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SLI 7800GT or 1x 7900GT?
"Scotter" wrote in message ... A lot of great choices. Hmmm I'm not as confident about SLI yet so I'd probably find a buyer for your current 7800GT or give it to a friend and buy one 7900 GTX but then I realize that is a more pricey option and one 7900 GTX isn't going to give much more performance than two 7800 GTs I suppose. Of course, that fluctuates game-to-game. Did you see the review/comparison he http://enthusiast.hardocp.com/articl...ZW50aHVzaWFzdA They actually show a lot about the exact situations you are thinking about! Thanks heaps for that Scotter - it was really helpful. And, briefly looking over that, I think I will stick with my plan of buyinmg a second 7800GT for SLI. The performance gain in buying the new cards doesn't seem worth the extra expense and bother. I like my games to look pretty, but I reckon a SLI 7800GT will be more than adequate for all the latest games for the next year or so. -- Scotter Tyan Thunder K8WE Dual Opteron 252s (2.6ghz) 4 gig Corsair XMS DDR400 RAM XFX 7800 GTX 256 w/VGAsilencerV3 500 gig Hitachi SATA 300 160 gig Seagate SATA 150 Dual Dell 24" wide aspect LCDs 550W Antec power supply X-Fi Platinum Soundblaster - "DC" dragoncarer@woops wrote in message ... Ok, so it appears that the 7900GT will cost a little bit more than a 7800GT costs right now (vendors depending, of course, and this in Australia where everything is a little more expensive video-card wise). If the 7900GT slightly exceeds the base clocks of a 7800GTX (450/1320 vs. 450/1250), I'm assuming 2x 7800GT (in SLI) will outperform a single 7900GT. Um...is this right? Essentially - should I go ahead and buy a second 7800GT (leadtex extreme 450/1050)? Or wait and buy a single 7900GT? I think this might turn out to be a very, very stupid question...but I need reassurance! |
#6
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SLI 7800GT or 1x 7900GT?
http://www.anandtech.com/video/showdoc.aspx?i=2717&p=8
2x 7800GT is over 60% faster than a single 7900GT in extremely fillrate-limited situations. Add another 7800GT and you can play Quake 4 at 2048x1536 4xAA and still keep your head above 60 fps... -- "War is the continuation of politics by other means. It can therefore be said that politics is war without bloodshed while war is politics with bloodshed." "DC" dragoncarer@woops wrote in message ... Ok, so it appears that the 7900GT will cost a little bit more than a 7800GT costs right now (vendors depending, of course, and this in Australia where everything is a little more expensive video-card wise). If the 7900GT slightly exceeds the base clocks of a 7800GTX (450/1320 vs. 450/1250), I'm assuming 2x 7800GT (in SLI) will outperform a single 7900GT. Um...is this right? Essentially - should I go ahead and buy a second 7800GT (leadtex extreme 450/1050)? Or wait and buy a single 7900GT? I think this might turn out to be a very, very stupid question...but I need reassurance! |
#7
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SLI 7800GT or 1x 7900GT?
On 10 Mar 2006 10:35:33 -0800, "johns" wrote:
If you google .. there's a 1Kwatt psupply out there just for the nVidia cards. I think it is only $600, and comes with a dozen eggs. johns Warning: ATi troll. (For the OP, please see:- http://www.anandtech.com/video/showdoc.aspx?i=2717 ) For the troll, the following power-related information is extracted from the above article and other sources:- ( OT mode on ) Even the dual 7900GTX(512) will do quite nicely on a 600watt SLI rated supply (~ $140 max.). Need a PC Power & Cooling 850 watt (~ $450) only for dual ATi X1900XTX (512) and for dual configurations of the now-obsolete 7800GTX512. Read on.... The sharply lower power consumption is not surprising since the ATi X1900XT(X) GPU (R580) is 353mm square and the 7900GT(X) (G71) is 196mm square, which according to my math makes the ATi R580 3.24 times the area of the G71, both on the 90nm process. Maximum power consumption of the G71 GPU at GTX speed is about 50% that of the R580 GPU at XTX speed, resulting in a power ratio at board level of about 75%. The 7900GTX512 has almost exactly the same maximum power consumption as a current 7800GTX(256) at default clock speed. And a dual-SLI configuration of these latter boards does not need any more than a 600 watt-rated SLI ATX 2.x supply ( Enermax 701 or similar) ATi's R580 design is very wasteful of silicon area and power, and results in a die cost at least 4x that of the G71 (3.24x plus a yield loss factor for the much larger die). This translates into a ~2x cost ratio for ATi/nVidia for the packaged and tested GPUs, factoring in the packaging and test overheads. Not good news for ATi at all, especially since the power- and cost-efficiency differences will also be mirrored in the Xbox360 and PS3 GPU designs. The G71 has ~ 40 million fewer transistors than the G70 (7800GTX) with improved functionality too. nVidia has cranked the G71 and G73 with the deliberate intent of competitively and drastically lowering prices but simultaneously offering much higher clock speeds, lower power and no loss of functionality over the G70/72. Also a further die shrink of the G71 and G73 on to the TSMC 80nm 'half-node' process can happen at any time with zero design changes when the manufacturing yields are judged satisfactory -- the design rules do not change. (OT mode off) John Lewis |
#8
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SLI 7800GT or 1x 7900GT?
"First of One" wrote in message ... http://www.anandtech.com/video/showdoc.aspx?i=2717&p=8 2x 7800GT is over 60% faster than a single 7900GT in extremely fillrate-limited situations. Add another 7800GT and you can play Quake 4 at 2048x1536 4xAA and still keep your head above 60 fps... lol...this is brilliant. Thanks for this First. Ha and it appears that SLI 7800GT setup has higher fps than a single 7900GTX... There may be more than meets the eye in these benchmarks, but as far as I can tell this is all good. Nice and reassuring! Thanks again First of One. -- "War is the continuation of politics by other means. It can therefore be said that politics is war without bloodshed while war is politics with bloodshed." "DC" dragoncarer@woops wrote in message ... Ok, so it appears that the 7900GT will cost a little bit more than a 7800GT costs right now (vendors depending, of course, and this in Australia where everything is a little more expensive video-card wise). If the 7900GT slightly exceeds the base clocks of a 7800GTX (450/1320 vs. 450/1250), I'm assuming 2x 7800GT (in SLI) will outperform a single 7900GT. Um...is this right? Essentially - should I go ahead and buy a second 7800GT (leadtex extreme 450/1050)? Or wait and buy a single 7900GT? I think this might turn out to be a very, very stupid question...but I need reassurance! |
#9
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SLI 7800GT or 1x 7900GT?
"John Lewis" wrote in message ... On 10 Mar 2006 10:35:33 -0800, "johns" wrote: If you google .. there's a 1Kwatt psupply out there just for the nVidia cards. I think it is only $600, and comes with a dozen eggs. johns Warning: ATi troll. (For the OP, please see:- http://www.anandtech.com/video/showdoc.aspx?i=2717 ) Thanks John! First just slightly beat you to it with a direct link to the Quake 4 results - but all in all this is really quite reassuring. Spot on the sort of comparisons I was looking for. For the troll, the following power-related information is extracted from the above article and other sources:- ( OT mode on ) Even the dual 7900GTX(512) will do quite nicely on a 600watt SLI rated supply (~ $140 max.). Need a PC Power & Cooling 850 watt (~ $450) only for dual ATi X1900XTX (512) and for dual configurations of the now-obsolete 7800GTX512. Read on.... The sharply lower power consumption is not surprising since the ATi X1900XT(X) GPU (R580) is 353mm square and the 7900GT(X) (G71) is 196mm square, which according to my math makes the ATi R580 3.24 times the area of the G71, both on the 90nm process. Maximum power consumption of the G71 GPU at GTX speed is about 50% that of the R580 GPU at XTX speed, resulting in a power ratio at board level of about 75%. The 7900GTX512 has almost exactly the same maximum power consumption as a current 7800GTX(256) at default clock speed. And a dual-SLI configuration of these latter boards does not need any more than a 600 watt-rated SLI ATX 2.x supply ( Enermax 701 or similar) ATi's R580 design is very wasteful of silicon area and power, and results in a die cost at least 4x that of the G71 (3.24x plus a yield loss factor for the much larger die). This translates into a ~2x cost ratio for ATi/nVidia for the packaged and tested GPUs, factoring in the packaging and test overheads. Not good news for ATi at all, especially since the power- and cost-efficiency differences will also be mirrored in the Xbox360 and PS3 GPU designs. The G71 has ~ 40 million fewer transistors than the G70 (7800GTX) with improved functionality too. nVidia has cranked the G71 and G73 with the deliberate intent of competitively and drastically lowering prices but simultaneously offering much higher clock speeds, lower power and no loss of functionality over the G70/72. Also a further die shrink of the G71 and G73 on to the TSMC 80nm 'half-node' process can happen at any time with zero design changes when the manufacturing yields are judged satisfactory -- the design rules do not change. (OT mode off) John Lewis |
#10
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SLI 7800GT or 1x 7900GT?
"DC" dragoncarer@woops wrote in message ... "Scotter" wrote in message ... A lot of great choices. Hmmm I'm not as confident about SLI yet so I'd probably find a buyer for your current 7800GT or give it to a friend and buy one 7900 GTX but then I realize that is a more pricey option and one 7900 GTX isn't going to give much more performance than two 7800 GTs I suppose. Of course, that fluctuates game-to-game. Did you see the review/comparison he http://enthusiast.hardocp.com/articl...ZW50aHVzaWFzdA They actually show a lot about the exact situations you are thinking about! Thanks heaps for that Scotter - it was really helpful. And, briefly looking over that, I think I will stick with my plan of buyinmg a second 7800GT for SLI. The performance gain in buying the new cards doesn't seem worth the extra expense and bother. I like my games to look pretty, but I reckon a SLI 7800GT will be more than adequate for all the latest games for the next year or so. True. The 7900's *are* a bit faster and cooler running too. But it's more like the difference between Ti4600/Ti4800 or FX5800/FX5900 than the 'non-owners' are hollering about BTW; I am *NOT* disappointed in the quality or performance of my 7800GTX's at ALL. Going from 6xxx to 7xxx was deffo a good move McG. -- Scotter Tyan Thunder K8WE Dual Opteron 252s (2.6ghz) 4 gig Corsair XMS DDR400 RAM XFX 7800 GTX 256 w/VGAsilencerV3 500 gig Hitachi SATA 300 160 gig Seagate SATA 150 Dual Dell 24" wide aspect LCDs 550W Antec power supply X-Fi Platinum Soundblaster - "DC" dragoncarer@woops wrote in message ... Ok, so it appears that the 7900GT will cost a little bit more than a 7800GT costs right now (vendors depending, of course, and this in Australia where everything is a little more expensive video-card wise). If the 7900GT slightly exceeds the base clocks of a 7800GTX (450/1320 vs. 450/1250), I'm assuming 2x 7800GT (in SLI) will outperform a single 7900GT. Um...is this right? Essentially - should I go ahead and buy a second 7800GT (leadtex extreme 450/1050)? Or wait and buy a single 7900GT? I think this might turn out to be a very, very stupid question...but I need reassurance! |
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