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2 7800gt's = ?

post #1 of 23
Thread Starter 
Would two 7800gt's be better than one 7900gt or a 7950gt ?
post #2 of 23
Yes. 2x 7800GT's in SLI are equal to a single 7950GX2 performance wise I would say.
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post #3 of 23
Quote:
Originally Posted by kidwolf909 View Post
Yes. 2x 7800GT's in SLI are equal to a single 7950GX2 performance wise I would say.
No way, a 7950GX2 is basically two 7950's in SLI. The 7800 GT has 20 pixel pipelines, 256 memory, and a lower clock while the 7950 has 24 pixel pipelines, 512 memory, and higher clocks. I would say two 7800 GT (stock clocks) would be about the performance of one 7900 GTX overclocked... but im not absolutely sure...

Two 7800 GT SLI > 7900, 7950 I would imagine.
post #4 of 23
Quote:
Originally Posted by tubnotub1 View Post
No way, a 7950GX2 is basically two 7950's in SLI. The 7800 GT has 20 pixel pipelines, 256 memory, and a lower clock while the 7950 has 24 pixel pipelines, 512 memory, and higher clocks. I would say two 7800 GT (stock clocks) would be about the performance of one 7900 GTX overclocked... but im not absolutely sure...
But it's limited to the bandwidth of one single PCIe lane and has shown lack-lustre performance for what you would think it's capable of... Not to mention it's hotter than a steaming pile and can't OC well. It has 8 more pipelines, 512k more mem, a bit higher clock, but a limiting bus. It's probably the closest comparison to dual 7800's...
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post #5 of 23
Good points there for sure, however, im not sure if a full bandwith pci-e slot (16x) would actually hinder the performance of a card like that. After all, consider that a full bandwith slot can handle an 8800 GTX, which scores faster than two 7900 GTS in SLI... although I cant really say how much of that change is due to an architectural difference, or a data transfer difference. This really is a hard question that cant be answered w/o some benchies. Ill go see if I cant find any online. I personally think the best comparison for a dual 7800's would be a single X1950XTX...
post #6 of 23
Thread Starter 
Ok here is the question of the day, should I spring for two 7800gt's, or grap a 7950gt or a 1950xt ?
post #7 of 23
x1950xt easily
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post #8 of 23
Quote:
Originally Posted by tubnotub1 View Post
Good points there for sure, however, im not sure if a full bandwith pci-e slot (16x) would actually hinder the performance of a card like that. After all, consider that a full bandwith slot can handle an 8800 GTX, which scores faster than two 7900 GTS in SLI... although I cant really say how much of that change is due to an architectural difference, or a data transfer difference. This really is a hard question that cant be answered w/o some benchies. Ill go see if I cant find any online. I personally think the best comparison for a dual 7800's would be a single X1950XTX...
That's true, it's near impossible to make educated guesses about this simply based on specs... There are many factors that may benefit one and neglect the other. Just know that two 7800GT's in SLI is a pretty darn good system by today's standards, unless you bring DX10 into the picture cuz they can't do squat against a G80. However, dual 7800GT's will give you performance similar to some of the highest end OC'd 79xx series... And it should beat almost any single card above it (not including 7950GX2).

I wish I had another to SLi with...
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post #9 of 23
just get a 8800gts. you could find one for $380 (i think)
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post #10 of 23
Here is my dilema. First, if you go with the 1950xtx, then you wont be able to go crossfire later on if you need to, well, you can, but you will need a new mobo. Going with the 7800's will net you the most performance, however, upgrading from that will require two new cards! Going with the 7950 will most likely net you lower performance then the other two options, but does allow you to go SLI later on. This is a hard decision, im going to have to say 7950 all things considered.
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