Thursday, April 24th 2008
ATI Radeon HD 4800 Series Video Cards Specs Leaked
Thanks to TG Daily we can now talk about the very soon to be released ATI HD 4800 series of graphics cards with more details. One week ahead of its presumable release date, general specifications of the new cards have been revealed. All Radeon 4800 graphics will use the 55nm TSMC produced RV770 GPU, that include over 800 million transistors, 480 stream processors or shader units (96+384), 32 texture units, 16 ROPs, a 256-bit memory controller (512-bit for the Radeon 4870 X2) and native GDDR3/4/5 support as reported before. At first, AMD's graphics division will launch three new cards - Radeon HD 4850, 4870 and 4870 X2:
Source:
TG Daily
- ATI Radeon HD 4850 - 650MHz/850MHz/1140MHz core/shader/memory clock speeds, 20.8 GTexel/s (32 TMU x 0.65 GHz) fill-rate, available in 256MB/512MB of GDDR3 memory or 512MB of GDDR5 memory clocked at 1.73GHz
- ATI Radeon HD 4870 - 850MHz/1050MHz/1940MHz core/shader/memory clock speeds, 27.2 GTexel/s (32 TMU x 0.85 GHz) fill-rate, available in 1GB GDDR5 version only
- ATI Radeon HD 4870 X2 - unknown core/shader clock speeds, available with 2048MB of GDDR5 memory clocked at 1730MHz
278 Comments on ATI Radeon HD 4800 Series Video Cards Specs Leaked
Seems like the HD 4850 512MB GDDR5 is the winner here. Best price/performance/power ratio.
Unfortunately, the jury is still out on raw horsepower. How much faster will the 4850 be compared to the 3850? 50% more shaders. 15% faster RAM, 0% extra ROPs. Higher power consumption, (unless switching to GDDR5).
I would have like to see MORE HORSEPOWER, e.g. Texture units and ROPs, etc. I'm not convinced the extra 50% shaders will do much more than allow 8x AA rather than 4x AA, but still with all other settings the same. I hope I'm wrong.
Excluding the move to GDDR5 (optional), the new ATi cards seem more like a "3950". I dont think they deserve a "4" at the front. After all, performance wise, it's like a X800XT over X800Pro.
We all know what happened with the "awesome" specs of the 2900's.
forums.techpowerup.com/showpost.php?p=764016&postcount=21
It will be close to double. But it seems none of you is counting on ANY architectural improvements. Why?
Then again, i dont NEED it... lol.
does W1Z have one under the microscope as we speak?:toast:
(# of TMUs) x GPU clock rate
&
Pixel Fill Rate
(# of ROPs) x GPU clock rate
but doesn't equate to the same level of frame rates found in games. But that doesn't necessary equal to the performance in games. In some cases it's only a few frames.
If you notice, the GT and GTS 512 models of these video cards have higher texture and pixel fill rates then 3870 regardless if it's twice as high or not. Yes, other factors come into play however, the 3870 doesn't lag behind by the same magnitude which is why I believe it's not very efficient.
Therefore, it will be interesting to see how the 4870 stacks up.
*EDIT*
Wait, I've just found this on google:
Benchmark HD 4870 on beta drivers vs. HD 3870, HD 3870 Crossfire on Cat 8.4 and 8800GT here: HD.3870.3Dmark06=12,590 vs. HD.4870.3Dmark06benchmark.leak.html=21,223 :D
ROFL WARNING
How many more numbers are they going to have to increase before people realize that they are repackaging the same old crap?
nvidia kinda did that with the 9800 series but then again didnt ati kinda do that between teh 2900-3xxx series?
if so that would be awesome!! and a base core clock of 850mhz aint bad, and if the 55nm gpu allows some nice oc headroom i dont see why it cant be overclocked easily past 1ghz, but then again its all iff and assumptions here, still, pretty exciting stuff
try appling that rant to Nvidia, then you will be onto something