AMD Radeon R5 M435 vs AMD Radeon R7 M340 Comparison

# The Verdict

The AMD Radeon R5 M435 and AMD Radeon R7 M340 represent two distinct tiers within AMD's mobile graphics lineup. The R5 M435 is a modest performer, landing in the 33rd percentile of all GPUs in the database. The R7 M340 sits slightly lower, at the 30th percentile. The data shows a clear performance gap: the R5 M435 leads by 18.8% in the Geekbench OpenCL benchmark, a decisive margin for this class of hardware. Neither card is a gaming powerhouse; both are aimed at everyday computing, multimedia, and light creative workloads. The R5 M435 is the better pick for users who prioritize compute performance in OpenCL workloads. The R7 M340, meanwhile, trades blows with a cluster of similarly positioned rivals, making it a less distinctive choice. The verdict is straightforward: choose the R5 M435 if the benchmark data matters most to you, and consider the R7 M340 only if its specific feature set or platform compatibility is a priority.

Architecture Differences

Both GPUs are built on AMD's GCN architecture, but they are not identical. The R5 M435 uses the GCN 1.0 architecture, a mature design. The R7 M340 moves to GCN 3.0, a newer revision. The process node is the same at 28 nm, and both are fabbed at TSMC. However, the R7 M340 packs significantly more transistors: 1,550 million versus 690 million for the R5 M435. This is reflected in the die size, 125 mm² for the R7 versus 56 mm² for the R5. The transistor density is similar, 12.4M per mm² for the R7 and 12.3M per mm² for the R5, indicating that the R7 M340's larger die is a straightforward scaling of the smaller chip.

The memory subsystems differ in a meaningful way. The R5 M435 uses 2 GB of GDDR5 on a 64-bit bus, delivering 36.00 GB/s of bandwidth. The R7 M340 uses 2 GB of DDR3 on a 64-bit bus, providing 16.00 GB/s. The memory clock also differs: the R5 M435 runs at 1125 MHz (effective 4.5 Gbps), while the R7 M340 runs at 1000 MHz (effective 2 Gbps). This is a substantial difference in memory technology and bandwidth, which impacts memory-bound workloads.

Other specifications show both parts share a similar feature set. Both have 320 shading units, 20 texture mapping units, and 8 ROPs. The R5 M435 has a base clock of 780 MHz and a boost of 1030 MHz. The R7 M340 has a higher base clock at 943 MHz, but a lower boost at 1021 MHz. Pixel and texture fill rates are close: the R5 M435 posts 8.240 GPixel/s and 20.60 GTexel/s, while the R7 M340 posts 8.168 GPixel/s and 20.42 GTexel/s.

Where Each One Wins

The benchmark wins tell a clear story. In the head-to-head Geekbench OpenCL test, the Radeon R5 M435 wins outright, scoring 5859 against 4932, a victory margin of 18.8%. That is the single biggest differential in the comparison data and it is the deciding data point.

The R5 M435 also wins the overall comparison in the database: it is ahead of the AMD Radeon R7 M340 by 18.8%, ahead of the AMD Radeon R7 M340 by 0.3%, and ahead of the Intel UHD 730 by 1.2%. The R7 M340, by contrast, loses to its nearest rivals. It trails the AMD Radeon R7 240 by 0%, the AMD FirePro W4170M by 0.6%, the AMD Radeon R5 M430 by 0.9%, and the AMD Radeon R7 Graphics by 1.3%.

The R5 M435 is the winner for anyone whose primary workload is OpenCL compute, GPGPU tasks, or any workload that leans on raw shader throughput and memory bandwidth. The R7 M340 is a more balanced part, but the data shows it is consistently behind the R5 M435 in the compute tests.

FAQ

Q: Which GPU is faster in OpenCL workloads?

A: The AMD Radeon R5 M435 is faster. It scores 5859 in Geekbench OpenCL, which is 18.8% higher than the Radeon R7 M340's 4932.

Q: How do these GPUs compare to their closest rivals?

A: The R5 M435 scores 5859, which is 0.3% higher than the AMD Radeon R7 M465, 1.2% higher than the Intel UHD Graphics 730, 1.6% higher than the AMD Radeon HD 8730M, and 1.6% higher than the NVIDIA Quadro K620M. The R7 M340 scores 4932, which is 0.6% higher than the AMD FirePro W4170M and 1.3% higher than the AMD Radeon R7 Graphics, but it is 0.9% lower than the AMD Radeon R5 M430.

Q: Which GPU has the higher memory bandwidth?

A: The AMD Radeon R5 M435 has the higher memory bandwidth at 36.00 GB/s. The AMD Radeon R7 M340 offers 16.00 GB/s.

Q: What are the memory specifications of each card?

A: The R5 M435 has 2 GB of GDDR5 on a 64-bit bus. The R7 M340 has 2 GB of DDR3 on a 64-bit bus.

Q: Are the pixel and texture rates different?

A: Yes. The R5 M435 reaches 8.240 GPixel/s and 20.60 GTexel/s. The R7 M430 reaches 8.168 GPixel/s and 20.42 GTexel/s.

Q: Which GPU is the overall winner?

A: The AMD Radeon R5 M435 wins, with 1 win in the head-to-head comparison.

Head-to-Head Benchmarks

The recorded head-to-head benchmark is a single Geekbench OpenCL test. The AMD Radeon R5 M435 wins that test by a wide margin: 5859 versus 4932, a 18.8% lead. That is the largest performance delta among all recorded rival comparisons for both of these parts. The R5 M435 also holds a comfortable edge over its nearest rivals in the database: it beats the AMD Radeon R7 M465 by 0.3%, the Intel UHD Graphics 730 by 1.2%, the AMD Radeon HD 8730M by 1.6%, and the NVIDIA Quadro K620M by 1.6%.

The R7 M340 is less decisive in its comparisons. It is ahead of the AMD Radeon R7 240 by 0.0%, the AMD FirePro W4170M by 0.6%, the AMD Radeon R5 M430 by 0.9%, and the AMD Radeon R7 Graphics by 1.3%. It does not win the head-to-head, however, and that is a factor for users who want the top performer in this class. The AMD Radeon R5 M435 remains the faster part in the direct comparison, and the better option for compute-heavy workloads.