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128 bit vs 256 bit

Last response: in Graphics & Displays
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July 3, 2012 9:32:35 PM

So my XFX GTS 250 1gb 256bit went out so I sent it in to be repaired. They replaced it with an AMD 6750 that's 128 bit. Now I realize that the 250 is DDR3 and the 6750 is DDR5, but I was curious if I'm getting jobbed here?
http://www.newegg.com/Product/Product.aspx?Item=N82E168... <---- 250
http://www.newegg.com/Product/Product.aspx?Item=N82E168... <--- replacement

More about : 128 bit 256 bit

a b U Graphics card
July 3, 2012 9:48:38 PM

No, those cards are roughly comparable.
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a c 116 U Graphics card
a b À AMD
July 3, 2012 9:50:39 PM

They're roughly the same. The 6750 may be a tad bit better

The GDDR5 memory makes 4 IO tansfers per bus clock cycle while the GDDR3 memory only makes 2
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a b U Graphics card
July 3, 2012 9:54:05 PM

Keep in mind GDDR5 is faster than DDR3 unless if it is 1gb, it can beat 2gb DDR3.
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a b U Graphics card
July 3, 2012 10:17:21 PM

if you want to know which graphics RAM is faster
6750 have 128bit with 4600mhz DDR5 the memory bandwidth of this card is 134.4GB/s
GTS 250 have 256bit with 2000 DDR3 the memory bandwidth of this card is 128GB/s
so 6750 have faster memory bandwidth and a little faster on games and it support DX11
GTS250 support DX10 so it cant enable some DX11 games effects .
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July 3, 2012 10:33:16 PM

the bits are bandwidth. you have less lanes going to your memory with 128bits, but the ddr5 ram really compensates for it.

therefore, as oxford said, they have pretty much upgraded you :p 
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