Tom's Hardware > Forum > Graphic & Displays > ATI > HD4850&4870, ati.com specifications 100% the same, huh?!

HD4850&4870, ati.com specifications 100% the same, huh?!

Forum Graphic & Displays : ATI - HD4850&4870, ati.com specifications 100% the same, huh?!

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zoog85   05-29-2009 at 06:04:53 PM

Ok, so I was checking the official specifications on ati.com for both the HD4870 and HD4850 and there is absolutely no difference at all in specifications, only the PSU requirements are different. How is this possible? There 4870 must have some advantage iver the 4850, right?

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Bronze Graphics badge hunter315   05-29-2009 at 06:12:23 PM
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the compare pages do not show you the number of SPUs, clock speed, or memory speed which are 800, 750, 900 vs 800, 625, 993. Also 4870 uses GDDR5 which is equivilant to a 4x multiplier on the memory clock compared to the 2x from the 4850's GDDR3

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zoog85   05-29-2009 at 06:19:09 PM
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Weird. I'm not comparing via the official compare option, I simple checked if there is any difference between the specs listed here:

http://ati.amd.com/products/Radeonhd4800/specs3.html

and here:

http://ati.amd.com/products/Radeonhd4800/specs.html

Which is pretty easy if you switch between the 2 Firefox tabs and looking at the same location (checking for differences in the text). Both pages list exactly the same information and it includes, as far as I can see, all the information.

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Bronze Graphics badge hunter315   05-29-2009 at 06:24:25 PM
- 0 +

yes but they dont list the clock speeds and technically yes they are the same GPU, however the difference between the clocks and the memory types is what sets them apart

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zoog85   05-29-2009 at 06:31:22 PM
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Ok thanks for the info :)

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505090   05-29-2009 at 06:32:16 PM
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as hunter said it's the clock speed and memory that it the difference.

If you use the compare option then click the details button it will show clock speeds. Or you can use newegg to compare them which may be better cause while every card has a min speed set my manufacturer some manufactures chose to exceed those specs.

------------------------------ E8400 : GA-EP35-DS3L : mushkin 4GB DDR2 800 : HD 2600PRO : 450W ATX12V : Windows 7
 Reply to 505090
zipzoomflyhigh   05-29-2009 at 06:33:35 PM
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The specs are the same. They are the same card except the 4870 has GDDR5.

------------------------------ P965/Q6700@3.2 8MB HD4850 OC Edition
4GB Corsair XMS 800
Vista64/Win7
Fatality 550w/Antec 300
 Reply to zipzoomflyhigh
jennyh   05-29-2009 at 07:26:37 PM
- 0 +

The 4870 has a 750mhz clock speed.

Reply to jennyh
505090   05-29-2009 at 07:42:03 PM
- 0 +

http://www.newegg.com/Product/Prod [...] 6814131140

------------------------------ E8400 : GA-EP35-DS3L : mushkin 4GB DDR2 800 : HD 2600PRO : 450W ATX12V : Windows 7
 Reply to 505090
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