Saturday, March 3rd 2012
AMD Radeon HD 7800 Series Specs. Table Leaked
Japanese media has got a hold of the specifications table of AMD's Radeon HD 7800 series products, the HD 7870 and HD 7850. Hermitage Akihabara has not cited a source as such, so we assume it vouches for the accuracy of this table. The table reveals Radeon HD 7870 as having 1280 stream processors, a 256-bit wide memory bus width (derived from the memory bandwidth and clock speeds figures provided in the table), 80 TMUs, 32 ROPs, and clock speeds of 1.00 GHz core, with 1200 MHz (4.80 GHz effective) memory. This SKU has a typical board power of 175W.
The slide details the HD 7850 as having 1024 stream processors, 64 TMUs, 32 ROPs, the same 256-bit GDDR5 memory interface, with the same memory clock speed as the HD 7870, but with a lower core clock speed of 860 MHz. the board power for the HD 7850 is mentioned to be under 130W. Interestingly, 2 GB is standard memory amount for both cards. The Japanese site mentions the official launch date of HD 7800 series as being March 8, but also goes on to add that market availability (we're assuming they mean the Japanese market), is only expected on/after March 19.
Sources:
Hermitage Akihabara, VR-Zone, and 456,000+ search results for "AMD Radeon HD 7800 Specifications" on Google
The slide details the HD 7850 as having 1024 stream processors, 64 TMUs, 32 ROPs, the same 256-bit GDDR5 memory interface, with the same memory clock speed as the HD 7870, but with a lower core clock speed of 860 MHz. the board power for the HD 7850 is mentioned to be under 130W. Interestingly, 2 GB is standard memory amount for both cards. The Japanese site mentions the official launch date of HD 7800 series as being March 8, but also goes on to add that market availability (we're assuming they mean the Japanese market), is only expected on/after March 19.
50 Comments on AMD Radeon HD 7800 Series Specs. Table Leaked
20% less shaders on 7850 thats a big difference.
And don't forget that GCN architecture is not the same as VLiW.
A stock 6850 has:
Pixel fillrate - 24.8Gpixel/s
Texture fillrate - 37.2GTexel/s
If the specs are correct, a stock 7850 has:
Pixel fillrate - +11%
Texture fillrate - +48%
vs stock 6870:
Pixel fillrate - -4.6%
Texture fillrate - +9.1%
So, a 7850 is basically a slightly improved and more efficient 6870.
It looks to me like they're positioning the 7850 to be in a 'bridge' position; with 2GB memory it falls into the mid-range sweet spot, with 1GB memory it fills the slot currently held by the 6790.
In terms of performance:
6770 -->6790 -->6850 -->6870 1GB -->6870 2GB
xxxx -->7750 -->7770 -->7850 1GB -->7850 2GB
amd made good product in time, and they deserves extra reward for this
my stock HD5850 ;
725MHz Core / 1000MHz RAM ;
Shadercount 1440 ;
ROPs 32 ;
23.2 GP/s and 52.2 GT/s ;
RAM Bandwith 128 GB/s ;
TDP was 170W i think ; imagine it with 860MHz like the 7850; it gets a bit HOT then
HD 6950: Core clock: 800 MHz. Memory-clock: 1250 MHz. Stream processors: 1408. Computing power: 2.25 TFLOPS.
HD 7850: Core clock: 860 MHz. Memory-clock: 1200 MHz. Stream processors: 1024. Computing power: 1.76 TFLOPS.
What it will end up being I suspect is the same as what happened with Cape Verde (HD 77xx): same price, less performance and lower power consumption compared to previous gen cards. I'm hoping that the 7850 will be around 200€, and that the 7870 will be around 250€. However, I'm almost certain that the price will be higher than that.
www.3dcenter.org/
So, the 7870 si the new 6970 probably at the same price and the 7850 is the new 6950 proly at the same price.
It was expected that this new gen of cards, the 7800 series and under would bring the same performance for the same money as last gen.
The only reason to buy these cards is from someone coming from a 6850/6870/gtx560/460
other titles look about right
theres also the law of diminshing returns to keep in mind as welel
chinese.vr-zone.com/11249/amd-hd7870-hd7850-03032012/
But then, HD7850 is still too close and the number of SPs is even lower (-75% !!) and clocks not much higher. The difference just does not seem to correspond with the specs is all I'm saying. For how much will they sell them because if it's less than $380 they just made their own HD7950 almost obsolete.And Wow! Those slides are hilarious. HD7870 41% faster than GTX570. Not even the HD7970 is so much faster. :laugh: Actual difference in W1zz's HD7970 review is 25-30%