AMD Instinct MI300 vs AMD Radeon RX 7600M XT Comparison

AMD Instinct MI300 and AMD Radeon RX 7600M XT represent two vastly different design philosophies from the same manufacturer, one aimed at datacenter compute and the other at mobile gaming. The recorded data shows almost no overlap in their target workloads, yet the specification sheets reveal distinct strengths that can be quantified directly.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries for these two accelerators. The Instinct MI300 has no recorded benchmark scores and sits at the 50th percentile of all GPUs in the database with an average benchmark score of zero. The Radeon RX 7600M XT, by contrast, has a full suite of recorded results and holds the 52nd percentile with an average benchmark score of 12710.

Since the MI300 lacks any measured scores, the comparison must rest on the RX 7600M XT's recorded data and the architectural specifications of both parts. The RX 7600M XT delivers 2048 points in 3DMark Steel Nomad DX12, 74869 in Geekbench OpenCL, and 27793 in Geekbench Vulkan. In Passmark tests, it scores 76 in DirectX 10, 137 in DirectX 11, 58 in DirectX 12, and 175 in DirectX 9. Its Passmark G3D score is 13907, its G2D score is 894, and its GPU compute score is 7140.

The nearest rivals for the RX 7600M XT in the database are all older NVIDIA parts. The GeForce GTX 670 posts an average score of 12773, which is 0.5 percent higher than the RX 7600M XT. The Tesla K20Xm scores 12625, putting the AMD part 0.7 percent ahead. The GeForce GTX 590 averages 12830, placing the RX 7600M XT 0.9 percent behind. The AMD Radeon Pro 455 averages 12831, again leaving the RX 7600M XT 0.9 percent behind.

These delta values are small, all within a single percentage point. The RX 7600M XT effectively trades blows with a set of GPUs from roughly a decade earlier, which reflects its mobile positioning rather than any deficiency in raw throughput. The MI300, with no scores at all, cannot be ranked against these parts in any measured workload.

The Verdict

From the data alone, the RX 7600M XT is the only one of the two with any recorded benchmark evidence. Any user requiring verified graphics or compute performance from the database must choose the RX 7600M XT, since the MI300 offers no measured results to validate its capabilities.

The MI300 is a datacenter accelerator with no display outputs, no DirectX support, no OpenGL support, and no Vulkan support. Its API compatibility is listed as N/A across the board. It cannot render frames to a screen, run gaming APIs, or participate in any consumer graphics workload. The RX 7600M XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and its display outputs are described as portable device dependent, meaning it is designed to drive displays in mobile systems.

For compute workloads, the MI300's specifications indicate far larger resources, but without benchmark scores the database cannot confirm real-world performance. The verdict splits cleanly: the RX 7600M XT for any measured or graphics-oriented task, the MI300 for massively parallel datacenter deployments where its specifications suggest suitability but no recorded evidence exists.

Architecture Differences

The MI300 uses the Aqua Vanjaram chip built on CDNA 3.0 architecture, fabricated on a 5 nm TSMC process. The RX 7600M XT uses the Navi 33 chip built on RDNA 3.0 architecture, fabricated on a 6 nm TSMC process. Both come from TSMC, but the node difference is one nanometer, with the MI300 on the smaller process.

The transistor counts differ by an order of magnitude. The MI300 packs 153,000 million transistors on a die size of 1017 mm², yielding a transistor density of 150.4 million per square millimeter. The RX 7600M XT contains 13,300 million transistors on a 204 mm² die, for a density of 65.2 million per square millimeter. The MI300 die is roughly five times larger and holds over eleven times the transistor count.

Clock behavior diverges sharply. The MI300 runs at a 1000 MHz base and 1700 MHz boost. The RX 7600M XT runs at 1280 MHz base, 2469 MHz boost, and a 2023 MHz game clock. The mobile chip clocks much higher, while the datacenter chip relies on scale rather than frequency.

Memory architecture is completely different. The MI300 uses 128 GB of HBM3 on an 8192 bit bus, delivering 5.32 TB/s of bandwidth. The RX 7600M XT uses 8 GB of GDDR6 on a 128 bit bus, delivering 288.0 GB/s. The MI300 has 64 times the memory capacity and over 18 times the bandwidth. Memory clocks also differ: the MI300 runs at 1300 MHz with 5.2 Gbps effective, while the RX 7600M XT runs at 2250 MHz with 18 Gbps effective, a much faster per-pin data rate on a far narrower bus.

The MI300 has 14080 shading units, 880 texture mapping units, and zero ROPs. Its pixel rate is 0 MPixel/s and its texture rate is 1,496.0 GTexel/s. FP32 compute is 47.87 TFLOPS, and FP16 is also 47.87 TFLOPS at a 1:1 ratio. The RX 7600M XT has 2048 shading units, 128 TMUs, 64 ROPs, and 32 ray tracing cores. Its pixel rate is 158.0 GPixel/s, its texture rate is 316.0 GTexel/s, FP32 is 20.23 TFLOPS, and FP16 is 40.45 TFLOPS at a 2:1 ratio.

Power and connectivity differ just as much. The MI300 has a 600 W TDP, uses two 8-pin power connectors, and requires a 1000 W suggested power supply. It connects over PCIe 5.0 x16. The RX 7600M XT has a 120 W TDP, uses no external power connectors, and is classified as an IGP (integrated graphics processor). It connects over PCIe 4.0 x16. The MI300 measures 267 mm in length and 111 mm in height. The RX 7600M XT has no recorded dimensions, consistent with its mobile integration.

FAQ

Q: Which GPU has higher FP32 compute?

A: The MI300 delivers 47.87 TFLOPS FP32, more than double the RX 7600M XT's 20.23 TFLOPS.

Q: Does the MI300 support DirectX?

A: No. Its DirectX support is listed as N/A, along with OpenGL and Vulkan, and it has no display outputs.

Q: How much memory bandwidth does each GPU have?

A: The MI300 has 5.32 TB/s from 128 GB of HBM3 on an 8192 bit bus. The RX 7600M XT has 288.0 GB/s from 8 GB of GDDR6 on a 128 bit bus.

Q: What is the power draw of each card?

A: The MI300 has a 600 W TDP with two 8-pin connectors and a 1000 W suggested power supply. The RX 7600M XT has a 120 W TDP and uses no external power connectors.

Q: Which process node is smaller?

A: The MI300 uses a 5 nm TSMC process, while the RX 7600M XT uses a 6 nm TSMC process.

Q: Does the RX 7600M XT have ray tracing cores?

A: Yes, it has 32 ray tracing cores. The MI300 has no ray tracing core count recorded.

Where Each One Wins

The RX 7600M XT wins in every area with recorded benchmark data. Its Passmark G3D score of 13907 and GPU compute score of 7140 give it a measurable performance footprint. Its API support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 makes it usable in consumer graphics and gaming environments. Its 64 ROPs and 158.0 GPixel/s pixel rate allow actual frame rendering, something the MI300 cannot do at all. Its 32 ray tracing cores enable hardware-accelerated ray tracing, a feature entirely absent from the MI300's specification sheet. Its higher boost clock of 2469 MHz and game clock of 2023 MHz indicate a design optimized for interactive workloads. Its 120 W TDP and lack of external power connectors make it suitable for mobile systems, and its PCIe 4.0 x16 interface fits mainstream platforms.

The MI300 wins in raw resource counts and memory capacity. Its 47.87 TFLOPS FP32 output is more than double that of the RX 7600M XT. Its FP16 throughput matches FP32 at 47.87 TFLOPS, while the RX 7600M XT reaches 40.45 TFLOPS FP16 only through a 2:1 ratio. The MI300's 128 GB of HBM3 memory dwarfs the 8 GB of GDDR6 in the mobile chip, and its 5.32 TB/s bandwidth is over 18 times higher. Its 14080 shading units and 880 TMUs vastly outnumber the RX 7600M XT's 2048 and 128. Its texture rate of 1,496.0 GTexel/s is nearly five times the RX 7600M XT's 316.0 GTexel/s. Its 153,000 million transistors on a 1017 mm² die represent a scale of silicon integration the mobile chip cannot approach. Its 600 W TDP and 1000 W suggested power supply reflect its datacenter intent, and its PCIe 5.0 x16 interface provides double the bus bandwidth of the RX 7600M XT's PCIe 4.0 x16 connection.

The MI300 also holds an edge in process technology, using a 5 nm node versus 6 nm, and in transistor density at 150.4 million per square millimeter versus 65.2 million. Its 8192 bit memory bus is 64 times wider than the RX 7600M XT's 128 bit bus. The two GPUs share a release date of January 3, 2023, but target entirely different segments: the MI300 as an Instinct-series datacenter part, the RX 7600M XT as a Radeon RX 7000 series mobile part. Neither has a successor recorded in the database, and neither has a launch MSRP listed.

Specification Differences

The two accelerators differ in nearly every recorded specification. The MI300 uses CDNA 3.0 architecture on a 5 nm process with 153,000 million transistors. The RX 7600M XT uses RDNA 3.0 architecture on a 6 nm process with 13,300 million transistors. Die size is 1017 mm² versus 204 mm². Transistor density is 150.4 million per square millimeter versus 65.2 million.

Clocks: the MI300 runs at 1000 MHz base and 1700 MHz boost, with memory at 1300 MHz and 5.2 Gbps effective. The RX 7600M XT runs at 1280 MHz base, 2469 MHz boost, and 2023 MHz game clock, with memory at 2250 MHz and 18 Gbps effective.

Memory: the MI300 has 128 GB of HBM3 on an 8192 bit bus with 5.32 TB/s bandwidth. The RX 7600M XT has 8 GB of GDDR6 on a 128 bit bus with 288.0 GB/s bandwidth.

Compute resources: the MI300 has 14080 shading units, 880 TMUs, and 0 ROPs. The RX 7600M XT has 2048 shading units, 128 TMUs, 64 ROPs, and 32 ray tracing cores. Pixel rate is 0 MPixel/s versus 158.0 GPixel/s. Texture rate is 1,496.0 GTexel/s versus 316.0 GTexel/s. FP32 is 47.87 TFLOPS versus 20.23 TFLOPS. FP16 is 47.87 TFLOPS at 1:1 versus 40.45 TFLOPS at 2:1.

Power and physical specs: the MI300 has a 600 W TDP, two 8-pin connectors, a 1000 W suggested PSU, and dimensions of 267 mm by 111 mm. The RX 7600M XT has a 120 W TDP, no external power connectors, no suggested PSU, and is classified as an IGP with no recorded dimensions.

Interface and outputs: the MI300 uses PCIe 5.0 x16 and has no display outputs. The RX 7600M XT uses PCIe 4.0 x16 and has portable device dependent display outputs. API support: the MI300 lists N/A for DirectX, OpenGL, and Vulkan. The RX 7600M XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Production status: the MI300 has no status recorded, while the RX 7600M XT is listed as active.