AMD Radeon HD 7800 Series Specs Revealed in Leak
With the launch of both the HD 7900 and HD 7700 series, AMD is expected to release its HD 7800 series GPUs in March. Today, we get our first peek at the specifications of the HD 7850 and HD 7870.
As reported first of February in a leaked roadmap, AMD is set to release its HD 7800 series graphics cards based on Pitcairn in March. Based on information coming out of Chinese-based EXPreview.com, we may have our first glimpse at the specifications for the new Pitcairn series. The HD 7800 series will utilize AMD's GCN stream processors seen with both HD 7900 and HD 7700 series.
Radeon HD 7850
- 20 Graphics CoreNext Compute Units
- 1280 stream processors
- 80 TMUs
- 24 ROPs
- Memory Bus of 256-bit
- Memory size of 1 GB/2GB GDDR5 memory
- Clock speeds of 900 MHz core
- Memory frequency of 1250 MHz (5.00 GHz effective)
Radeon HD 7870
- 22 Graphics CoreNext Compute Units
- 1408 stream processors
- 88 TMUs
- 24 ROPs
- Memory bus of 256-bit
- Memory size of 2GB GDDR5 memory
- Clock speeds of 950 MHz core
- Memory frequency of 1375 MHz (5.50 GHz effective)
Early pricing for the HD 7850 has it listed at around $220 dollars and the HD 7870 around $300 dollars. In the second quarter, AMD is expected to release both the HD 7990 and HD 7890. While the specs for HD 7990 are still relatively unknown, the HD 7890 will be based on Tahiti (same as the HD 7900 series). It is expected to feature 24 Graphics CoreNext Compute Units, 1536 stream processors, 96 TMUs, 32 ROPs, and have a 1.5 GB memory with memory interface of 384-bit. Early expectations for pricing has the price of the HD 7890 around $359 dollars.
Please keep in mind, of course, that these specifications are from EXPreview's supposedly reliable source. We won't know for sure until AMD shows its hand. Stay tuned!

Its only a matter of time before Physx dies in favor of general GPU computer libraries.
The 28nm gen is certainly shaping up to be an interesting one.
It's a very wide gap between mobile and desktop GPUs, but my i7-2820QM literally is a locked, downclocked 2600k. It's hard to justify rolling a desktop when anything less than said 2600k feels like a lateral move.
Don't make me buy the same chip twice. Release a new CPU or let me extract my notebook CPU, throw it into a desktop, and even out the clock difference.
I've stopped using it at all. The other day I wanted to translate a cake from danish to german. The end product according to google was 'green poison kuchen' - so only a third of the words were even german at the end of the day.
Its only a matter of time before Physx dies in favor of general GPU computer libraries.
Physx.
The average performance difference between 7970 and 7950 is about ~15% and 7950 has ~12.5% less SPs...likewise 7870 has 31.2% less SPs than 7970 so one should expect performance somewhere in this range 31-37.5% less...Anyway 6950 has about 31% less SPs than 7970 and performance wise it is on average 35% slower. So let's look at the 6950 and 7870, same number of SPs, ROP'S, and TMUs. So we are looking at performance somewhere between 31-35% less than 7970 or 0-4% better than 6950.
The price you pay for 1SPs for 7850 at $220 is $0.171
The price you pay for 1SPs for 6950 at $250 is $0.177
The price you pay for 1SPs for 6970 at $300 is $0.195
The price you pay for 1SPs for 7870 at $300 is $0.213
The price you pay for 1SPs for 7950 at $450 is $0.257
The price you pay for 1SPs for 7970 at $550 is $0.268
You can get a 560ti for around $200 now.
The average performance difference between 7970 and 7950 is about ~15% and 7950 has ~12.5% less SPs...likewise 7870 has 31.2% less SPs than 7970 so one should expect performance somewhere in this range 31-37.5% less...Anyway 6950 has about 31% less SPs than 7970 and performance wise it is on average 35% slower. So let's look at the 6950 and 7870, same number of SPs, ROP'S, and TMUs. So we are looking at performance somewhere between 31-35% less than 7970 or 0-4% better than 6950.
The price you pay for 1SPs for 7850 at $220 is $0.171
The price you pay for 1SPs for 6950 at $250 is $0.177
The price you pay for 1SPs for 6970 at $300 is $0.195
The price you pay for 1SPs for 7870 at $300 is $0.213
The price you pay for 1SPs for 7950 at $450 is $0.257
The price you pay for 1SPs for 7970 at $550 is $0.268
Ridiculous comparison. 7000 SPs do a lot more than 6000 series, plus there's other factors like the 7900 having a bigger bus.
Wait till the reviews are out, at least, and then look at price/performance not price/SPs.
Yep, I was about to write a similar comment. That's pretty much what they are doing I'll make it simpler.
6870