ATI Radeon HD 4000 Series discussion

[Luka_Aveiro]

http://www.tweaktown.com/news/9691/e...and/index.html

I don't understand this. They say this is suppose to be HD4850 but GPU-Z shows some really weird data. Clock is much faster and it shows GDDR5 yet bandwidth is out of whack. On the other hand score is much higher than default HD4850.

I thought HD4850 will only support GDDR3. Unless of course they really meant to say this is HD4870.

Smells like fake to me. Or at least very strange.

Actually, the only differences between HD4850 and HD4870 are GPU clocks (625mhz, 800mhz respectively, IIRC) and memory type (GDDR3, GDDR5 respectively)

It also sounds very strange to me too, I don't know what to think, but my guess is its fake...

Actually I believe it IS the 4870

The 750MHz core cant be reached by CCC right now so unless they've already done BIOS editing, it has to be the 4870 since thats the core clock for it.

Also, 4 x 900 = 3600 MHz which is the stock mem clock of the 4870 as well. I know its not supposed to be QDR, but read the GDDR5 whitepaper by Qimonda: http://www.qimonda-news.com/download...whitepaper.pdf

GDDR5 has a lot of differences so it might not be properly detected by GPU-Z anyways. That might also be why Vantage crapped out and couldn't give a proper score since it might not be detecting the card properly.

However those test results are ridiculous for the card... if it truly performs at that level, then the 4870 might be closer to the GTX260 and 9800GX2 than we thought.

This is the other side of my thinkings, guess I'll need more facts to convince me

BTW, wasn't HD4870 supposed to be 800mhz core clock???