ATI demo's Rad9700 with DDR II

[tart666]

ATI demo's Rad9700 with DDR II During a show on TechTV
They say the Ram speed was 550 MHz.

Now, on the other hand, NV30 is being planned with 1000MHz DDRII

Need some clarification here.

Is DDR II kind of double-DDR? I think I remember that it's actually running at 250MHz, but making 4 transfers per clock. Are these sources confused about how to report the ram speed ? Otherwise it would appear that the production-quality NV30 beats a prototype R300. Not very fair.

 

[Rand]

Otherwise it would appear that the production-quality NV30 beats a prototype R300.

Assuming your comparing peak memory bandwdith, the NV30 with DDR II at 1000MHz still only provides 16.0GB/s, one has to remember that nVidia has evidently decided to stick to a 128bit memory bus.
The current R9700 Pro offers 19.7GB/s of main memory bandwidth.

That said, nVidia's supposedly finally implementing some of GigaPixel's technology into the NV30... so real world memory bandwidth likely won't be quite as favourable for the R9700.

 

[Yohhan]

What's the memory bus on the R9700?

 

[Jeff7]

Originally posted by: tart666Is DDR II kind of double-DDR? I think I remember that it's actually running at 250MHz, but making 4 transfers per clock. Are these sources confused about how to report the ram speed ? Otherwise it would appear that the production-quality NV30 beats a prototype R300. Not very fair.

Yeah, it's sort of a QDR memory type; quad data rate, or double-double data rate.
Different places use different ways of reporting RAM speed. Some report effective speed, some report actual. I usually prefer something like this, to describe the P4 bus (example): 100MHz (400 effective). Reporting it like that makes it much clearer.

 

[Entropy007]

It's not QDR. It's DDR with some modifications to allow it to run faster and be cheaper to produce.
Hence DDRII = Second Generation of DDR

 

[SSXeon5]

Originally posted by: tart666
ATI demo's Rad9700 with DDR II During a show on TechTV
They say the Ram speed was 550 MHz.

Now, on the other hand, NV30 is being planned with 1000MHz DDRII

Need some clarification here.

Is DDR II kind of double-DDR? I think I remember that it's actually running at 250MHz, but making 4 transfers per clock. Are these sources confused about how to report the ram speed ? Otherwise it would appear that the production-quality NV30 beats a prototype R300. Not very fair.

Thats DDR-II 550 meaning 1100Mhz (1.1GHz) Ram, the current Radeon has DDR 310Mhz so it acually runs @ 620Mhz. NVidia can do anything they want but there NV30 is still not here and plains for Q1/2 2003 isnt looking good when the R9700 DDR-II is coming. Samsung has already shown 1GHz+ DDR-II graphic memory for production at the end of the year, and ATi just loves samsung With ATis image quality, 16x Trilinear Anisotropic Filtering, fast 2/4x AA speeds, and fast 256-bit memory the NV30 will have a fight with the 9700. ATi needs to improve there drivers a bit more to be 100% competitive, NVidias latest 40.xx driver improved the GF4 so much that it shows how advanced there driver developers are. Im hoping to see R9500 128MB reviews to see if i will grab that Hercules 9500

SSXeon

 

[SickBeast]

SELL YOUR NVIDIA STOCK!!!