The GeForce 8400 GS is a very misleading GPU. Like the older GeForce FX 5200, this GPU comes in many different forms. Three of them to be exact. Rev. 1 comes with 16 cores and 256MB of DDR2 memory. Rev. 2 comes with 8/16 cores and 128-512MB of DDR2 or GDDR3 memory. Rev. 3 comes with 8 cores and 512MB-1GB of DDR3 memory. It is also based on the newer Tesla 2.0 architecture. [Jul '21Driftking60]
The new AMD R9 390 is the direct successor to the R9 290. Both cards share the same GPU but the R9 390 is factory overclocked. The R9 390 has a 5% higher stock GPU clock, and a substantial stock memory clock increase of 20%. Additionally the R9 390 sports a minimum of 8GB of VRAM versus 4GB on the R9 290. At the current price levels of $329, the R9 390 can't compete given that R9 290s can be had for around $260. The increased VRAM will rarely help even at ultra high resolutions and in any case, most 4K gamers are likely to seek more GPU power than the R9 390 has to offer. We have seen several samples of the R9 390 and they scored an effective speed of 88.5% which, as expected, matches the speeds seen on overclocked R9 290s. On the face of it purchasing an R9 290 at a discount and then manually overclocking will result in the same performance as an R9 390 but with a saving of around $70. [Jun '15GPUPro]
We calculate effective 3D speed which estimates gaming performance for the top 12 games. Effective speed is adjusted by current prices to yield value for money. Our figures are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top GPUs. [GPUPro]
Welcome to our PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best value for money upgrades.