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128 bit vs. 256 bit HD 5770?

Last response: in Graphics & Displays
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March 29, 2010 9:44:32 PM

Basically I can get a 256 bit version for about 30 bucks more than the 128 bit... I am intending to be gaming.

Is 256 bit a substantial performance increase over 128 bit?

Thanks

More about : 128 bit 256 bit 5770

March 29, 2010 9:53:23 PM

Give me a link to a 256bit 5770 since, as far as I know, they don't exist. 128bit vs. 256bit would be a nice bump for the 5770 as its pretty clear the memory bus is the bottleneck. But yeah- I'd love to see a 256bit memory bus 5770.
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March 29, 2010 9:56:50 PM

You sure that 256 bit 5770 you are seeing isn't a 5830?

EDIT: just saw the link. I didn't think they made a 256 bit 5770? Typo?
March 29, 2010 9:57:00 PM

Seconded. The 256 bit memory bus would run the same speed as a 512 bit bus with DDR3. A definitely boost and totally worth the money.
a b 4 Gaming
March 29, 2010 9:59:37 PM

mustardsteve said:
Basically I can get a 256 bit version for about 30 bucks more than the 128 bit... I am intending to be gaming.

Is 256 bit a substantial performance increase over 128 bit?

Thanks


get the 5830 but its more then $30 more
March 29, 2010 9:59:46 PM

I have a feeling that is a typo or mislabeled product because the GPU used in the 57xx cards is a 128bit bus, especially since that card looks like its a straight up reference card with reference cooler and everything. I would contact the company and verify before buying it.
March 29, 2010 10:00:59 PM

Excellent! Thanks everybody. I don't think it's a typo, as there's 256 bit versions by Sapphire AND Diamond on this page. I could call them up and ask them to verify, if you folks think I should?
March 29, 2010 10:04:40 PM

I would absolutely call and verify. And if they say it's true, make sure you get a 30 day return policy in case of false advertising and check spec with GPUZ.

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March 29, 2010 10:10:36 PM
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Definitely call and verify as I've never heard of that, and I've followed the GPU tech quite closely for a while now. Also- if ATI had released a 256Bit memory bus version of the 5770, why would they not call it the 5790 or something?
Edit: Just saw this on their website:
"DISCLAIMERS

Visual & Typographical Errors

Since common errors are liable to occur, PC CYBER CANADA reserves the right to modify product prices and product images on its website at any given time. Occasionally, there could be cases of visual and/or typographical errors in pricing, item models and/or product description. While we do endeavor to keep these accurate and up to date, it is not impossible for mistakes to arise on our part. Hence, we appreciate constructive feedback from customers that might aid us in improving the online representations of our merchandise. All prices and other monetary amounts appearing on the Website are quoted in Canadian dollars. "

Makes me a little nervous and think maybe they are covering themselves in advance:-p
March 29, 2010 10:11:53 PM

Ooookay... Called, the guy said it was probably an error, but he told me to Google it, didn't have a way to verify as they didn't have the part in stock.
Diamond's website spec sheet on the card is here
http://www.diamondmm.com/5770PE51G.php
The thing is, I can't find a bus width. What it DOES say is
Memory Bandwidth : 76.8 GB/sec
I don't know if that actually answers the question though?

Edit:
flyinfinni said:


Visual & Typographical Errors

Since common errors are liable to occur, PC CYBER CANADA reserves the right to modify product prices and product images on its website at any given time. Occasionally, there could be cases of visual and/or typographical errors in pricing, item models and/or product description. While we do endeavor to keep these accurate and up to date, it is not impossible for mistakes to arise on our part. Hence, we appreciate constructive feedback from customers that might aid us in improving the online representations of our merchandise. All prices and other monetary amounts appearing on the Website are quoted in Canadian dollars. "

Makes me a little nervous and think maybe they are covering themselves in advance:-p



Yeah basically that's what the guy said to me on the phone. I haven't really followed the graphics card scene, so I didn't know to be skeptical. Thanks for all the replies though.

I guess I shouldn't be too upset... since it's DDR5, 128-bit is fine, I guess? It's still on the best cards for the money article, so I'm still pretty sure I want to get this card
March 29, 2010 10:19:46 PM

Best answer selected by mustardsteve.
March 29, 2010 10:20:32 PM

Its definitely a typo, that card DOES NOT exist.
You can go right to AMD's web site, they make the gpu. A card vendor can make custom cards , but not changes to chip architecture. Meaning they have changed ram speed in past. But in this case the card is already designed around gddr5.
http://www.amd.com/us/products/desktop/graphics/ati-rad...
March 29, 2010 10:20:54 PM

That is 128 bit, no question. I also looked the model number up and found it listed as 128bit on other sites. 76.8 GB/s is also the same as the normal 128bit 5770's.

Edit- Yes the 5770 even with 128bit bus is a great card and a great buy.:-)
Also- too many people posting at the same time lol!:-p
March 29, 2010 10:21:55 PM

That puts it to rest, then. No 256-bit, and PCCyber is a joke.
a b 4 Gaming
March 30, 2010 2:55:40 PM

Well, I wouldn't buy Diamond anyway, even if it is notably cheaper. Past experience suggests grief, and no competent and/or available tech support.
!