Over time, we can witness Smart Access Memory (Re-Size BAR) support for older generation Ryzen processors with Zen, Zen + and Zen 2 architecture.
The technology that AMD calls Smart Access Memory, based on the Re-Size Bar feature of the PCI Express standard, has been talked about and continues to be talked about. We mentioned that this technology will be supported by Intel and NVIDIA components. On the other hand, we see that AMD’s 400 series motherboards are also getting SAM support through manufacturers.
If you remember, the red team made a definite statement on this issue and it was said that support would not be offered with older generation processors. However, a user on Reddit seems to have enabled this feature with a B450 motherboard and first generation Ryzen processor. Some performance figures were even shared at the same time.
The user activated the Smart Access Memory technology with the ASUS B450-PLUS motherboard and an AMD Ryzen 7 1700 CPU. The motherboard was also running the latest 2409 BIOS released in early December.
By the way, the video card used in the test was the Radeon RX 580 model, based on the Polaris architecture. Let’s get to the performance differences in Doom Eternal and Shadow of The Tomb Raider. It is said that there is no performance difference in the Shadow of The Tomb Raider test, which was made in the ultra preset and 2560x1080p resolution. As for Doom Eternal, the game was tested on an Ultra preset at 1080p:
Smart Access Memory Off
Test 1: Average FPS: 125.6 FPS | Minimum FPS: 82.2 FPS | Max FPS: 250.3 FPS | 1% Low: 83.6 FPS | 0.1% Low: 41.1 FPS
Test 2: Average FPS: 123.0 FPS | Minimum FPS: 87.4 FPS | Max FPS: 251.1 FPS | 1% Low: 86.1 FPS | 0.1% Low: 75.7 FPS
Test 3: Average FPS: 123.0 FPS | Minimum FPS: 87.7 FPS | Max FPS: 251.4 FPS | 1% Low: 83.6 FPS | 0.1% Low: 73.5 FPS
Smart Access Memory Open
Test 1: Average FPS: 125.9 FPS | Minimum FPS: 85.4 FPS | Maximum FPS: 253.0 FPS | 1% Low: 86.0 FPS | 0.1% Low: 77.1 FPS
Test 2: Average FPS: 124.2 FPS | Minimum FPS: 82.0 FPS | Max FPS: 252.9 FPS | 1% Low: 85.9 FPS | 0.1% Low: 43.0 FPS
Test 3: Average FPS: 124.6 FPS | Minimum FPS: 79.4 FPS | Max FPS: 252.8 FPS | 1% Low: 81.7 FPS | 0.1% Low: 65.7 FPS
Smart Access Memory Enabled Average
Average FPS: 124.90 FPS | Minimum FPS: 82.26FPS | Maximum FPS: 252.90 FPS | 1% Low: 84.53 FPS | 0.1% Low: 61.93 FPS
Average FPS: + 0.839%
Minimum FPS: -6.20%
Maximum FPS: + 0.596%
1% Low: + 0.119%
0.1% Low: -2.365%