Once you get artifacts or a lockup, back down 25 or preferably 50 MHz and typically that is your stable result in it's highest threshold - under the condition that the room temperature is the same (yes heat and surrounding heat have an influence on your overclock). In the first stage you overclock your GPU, in the second the memory. First off let us remind you that we recommend increments of 25 MHz on core and memory (from the default base clock frequency upwards).
Msi amd radeon hd 7800 free#
Obviously board partners are free to define faster factory clocks.When you want to overclock a graphics card typically you need to verify and stabilize your tested settings.
Msi amd radeon hd 7800 full#
Well, that's not an issue for AMD either, the R7850 is clocked at 860 MHz while the Radeon HD 7870 will get a reference core clock frequency at a full GHz. The Pitcairn GPU packs 2.8 billion transistors, but if you can't apply a fast enough clock frequency it would become a problem. This will give the Pitcairn GPUs 154 GB/sec of framebuffer bandwidth in which to do their thing. The memory clock will be 1200 MHz on both products, being quad data-rate (gDDR5) that results in an effective data rate of 4800 MHz or 4.8 GHz. The memory bus is 256-bit, but combined with the gDDR5 memory (which is quad data rate) you do get a decent chunk of much needed memory bandwidth, which the GPU can certainly use. Memory wise both cards in reference form will pack 2 gigabytes of gDDR5 memory, quite a bit for mainstream level products. The board power is rated at 175W, the actual TDP will be a little lower as we'll demonstrate later on. The Radeon HD 7870 is packed with 1280 shader processors harbored in Compute Unit segments (20 of them).The board power is rated at 130W, the actual TDP will be a little lower as we'll demonstrate later on. The Radeon HD 7850 is packed with 1024 shader processors harbored in Compute Unit segments (16 of them).The Radeon HD 7800 Pitcairn graphics core has a good 2.8 Billion transistors, the internal architecture has changed compared to the previous generation products, we'll talk a little deeper about that in a minute, but as a result: AMD now bakes GPUs on the all new 28nm node, in very simple wording that means they can put more transistors on a smaller processor die area, typically resulting in less power consumption as well. DDM audio is now fully supported (you hear audio on the actual monitor it's played on), a new 5x1 landscape mode is introduced, and you may now create custom multi-monitor resolutions.
Msi amd radeon hd 7800 series#
With the launch of the Radeon HD 7000 series Eyefinity has been updated to version 2.0. We'll address all these features separately of course. The GPU architecture was overhauled, AMD moved towards a 28nm process technology, the new cards are all PCIe gen 3 compatible and there have been significant changes on power consumption. It is important to understand that there are significant changes in this family of GPUs. We shall name that the Radeon HD 7990 for now. That said, of course a dual-GPU based Tahiti graphics card is still pending launch. We do expect to see some respins and slightly different SKUs over time, but basically this is the entire lineup. The entire segment from top to bottom is now released in Q1 2012, the 28nm stack has been filled. High-end level = Tahiti = Radeon HD 7900 series.Mainstream level = Pitcairn = Radeon HD 7800 series.Entry level = Cape Verde = Radeon HD 7700 series.
Finally there's "Tahiti" which is the codename for the GPU used in the most high-end products. Next in line is "Pitcairn" which is the codename for AMD's mainstream products and thus the series 7800 tested today. When you notice "Cape Verde" that's the entry level Radeon HD 7700. It's simple really, in the market we have entry level, mainstream and high-end products. You've been hearing several codenames flying around and that can be a little confusing, so as we always do, let's explain that first.