We are just ten days away from AMD’s Kaveri APU launch and the performance leaks regarding the A10-7800 have already started to occur. The first leaked performance preview comes from Baidu Chinese forums where a user has acquired a final retail sample of chip and compared it against the A10-6800K showing some interesting numbers.
AMD A10-7800 Kaveri APU Benchmarked Against A10-6800K
Before showing the numbers, let’s talk about the APUs themselves which are going to be launched two weeks from now. The AMD A10-7850K is the flagship Kaveri APU for 2014 which would replace the Richland A10-6800K APU. The A10-7850K has four Steamroller cores and 512 GCN stream processors which bring its performance on a level equivalent to the Radeon HD 7750 in terms of graphics performance. The A10-7850K has a max compute of 856 GFLops (GPU + CPU) compared to 779 GFlops on the Richland A10-6800K APU.
The clock speed of the APU is maintained at 3.7 GHz which is presumably the base clock while Turbo clock would push the speeds beyond 4 GHz barrier. The GPU which is positioned in the R7 2**D series is clocked at 720 MHz while the APU itself has 4 MB of L2 cache. The GCN graphics die would feature 8 GPU cores which represent a total of 512 stream processors. The TDP for the A10-7850K would be set at 95W. AMD A10-7850K will support both Mantle API, DirectX 11.2 and OpenGL 4.3 and feature dual graphics functionality with the AMD’s Cape Verde based discrete GPUs.
Next up, we have the A10-7700K which is another unlocked chip featuring the Steamroller core architecture with a max boost clock of 3.8 GHz and base clock of 3.5 GHz. It features 4 MB of L2 cache plus HSA features and True Audio technology support. The GPU side ships with a GCN graphics die featuring 6 shader units equaling to a total of 384 Stream processors clocked at 720 MHz. The A10-7700K features a TDP of 95W so we may see one Kaveri APU part based on the A8 series which would feature a TDP of 65W.
Now we come to the new SKU details starting with the A10-7800 (Non-K) which has 4 cores clocked at 3.5 GHz base and 3.9 GHz turbo while the graphics side would be equipped with 8 GCN compute units resulting in 512 Stream processors which would be clocked at 654 MHz base and 720 MHz boost. The APU would feature a 65 Watt TDP but won’t support any kind of overclocking due to the locked multiplier.
AMD A10-7850K and A10-7700K Specifications:
|Model||AMD A10-7850K ‘Kaveri’||AMD A10-7700K ‘Kaveri’||AMD A10-7800 ‘Kaveri’||AMD A10-6800K ‘Richland’|
|Turbo Core 3.0||Yes||Yes||Yes||Yes|
|Base Clock||3.7 GHz||3.5 GHz||3.5 GHz||4.1 GHz|
|Turbo Clock||4.0 GHz||3.8 GHz||3.9 GHz||4.4 GHz|
|L2 Cache||4 MB L2||4 MB L2||4 MB L2||4 MB L2|
|Graphics Core||GCN Radeon R7||GCN Radeon R7||GCN Radeon R7||HD 8000|
|GPU Cores||512 Cores||384 Cores||512 Cores||384 Cores|
|GPU Clock||720 MHz||720 MHz||720 MHz||844 MHz|
|Price||>$150 US||<$150 US||TBA||$149 US|
|Launch Date||14th January 2014||14th January 2014||14th January 2014||4th June 2013|
Alright, with the specifications mentioned now we get on with the interesting part. From the benchmarks shown, it can clearly be seen that the Kaveri A10-7800 is clearly ahead of the A10-6800K in clock-to-clock performance so the SteamrollerB cores do have some nice IPC improvement on their end but not quite as much as expected.
What surprised me here is that the graphics performance isn’t as great as i expected with A10-7800 being a 3-5% faster than the VLIW4 iGP based A10-6800K in gaming benchmarks even though it features 512 GCN cores against the 384 VLIW4 cores of its predecessor. With an added HD 7750 which enables Dual Graphics, the core performance leverages by a ton and i believe the chip would also be compatible with several R7 series graphics cards such as the R7 255, R7 260 and R7 260X although that remains to be confirmed.
The graphics performance could be slow since AMD has yet to launch a Catalyst Driver suite that is officially aimed to optimize the graphics performance of their Kaveri APUs and would only be available at launch so i am expecting some improvements that would atleast give the IGP a 5-10% boost over Richland. You can see the benchmarks below along with test setup and power consumption of the chip which is 10W lower than the Richland setup.
AMD Kaveri A10-7800 vs A10-6800K Benchmarks: