diff --git a/pkg/types/aws/validation/machinepool.go b/pkg/types/aws/validation/machinepool.go
index e869d3e1f2..4ba81505ba 100644
--- a/pkg/types/aws/validation/machinepool.go
+++ b/pkg/types/aws/validation/machinepool.go
@@ -17,7 +17,7 @@ var (
 		types.ArchitectureARM64: true,
 	}
 
-	// validArchitectureValues lists the supported arches for AWS
+	// validArchitectureValues lists the supported arches for AWS.
 	validArchitectureValues = func() []string {
 		v := make([]string, 0, len(validArchitectures))
 		for m := range validArchitectures {
@@ -39,6 +39,14 @@ var (
 // We set a user limit of 10 and reserve 6 for use by OpenShift.
 const maxUserSecurityGroupsCount = 10
 
+// maxThroughputIopsRatio is the maximum allowed ratio of throughput (MiBps) to IOPS for gp3 volumes.
+// AWS constraint: throughput (MiBps) / iops <= 0.25 (maximum 0.25 MiBps per iops).
+const maxThroughputIopsRatio = 0.25
+
+// gp3DefaultIOPS is the default IOPS value for gp3 volumes when not explicitly set.
+// According to AWS documentation, gp3 volumes have a baseline of 3,000 IOPS.
+const gp3DefaultIOPS int32 = 3000
+
 // ValidateMachinePool checks that the specified machine pool is valid.
 func ValidateMachinePool(platform *aws.Platform, p *aws.MachinePool, fldPath *field.Path) field.ErrorList {
 	allErrs := field.ErrorList{}
@@ -129,6 +137,31 @@ func validateThroughput(p *aws.MachinePool, fldPath *field.Path) field.ErrorList
 	case "gp3":
 		if throughput < 125 || throughput > 2000 {
 			allErrs = append(allErrs, field.Invalid(fldPath.Child("throughput"), throughput, "throughput must be between 125 MiB/s and 2000 MiB/s"))
+			return allErrs
+		}
+		// AWS constraint: throughput (MiBps) / iops <= 0.25 (maximum 0.25 MiBps per iops)
+		// When iops is 0 or omitted, AWS defaults to 3000 iops
+		// Validate that the throughput/iops ratio does not exceed the maximum allowed ratio
+		iops := int32(p.EC2RootVolume.IOPS)
+		if iops == 0 {
+			// Use AWS default of 3000 iops when iops is not set
+			iops = gp3DefaultIOPS
+		}
+		// Use integer comparison to avoid floating point precision issues
+		// throughput / iops <= 0.25 is equivalent to throughput * 4 <= iops
+		if throughput*4 > iops {
+			// Calculate minimum required iops: iops >= throughput / 0.25
+			// Round up to nearest 100 for safety
+			calculatedIOPS := ((throughput * 4) + 99) / 100 * 100
+			// According to AWS documentation, gp3 volumes have a baseline of 3,000 IOPS
+			minIOPS := max(calculatedIOPS, gp3DefaultIOPS)
+			// Calculate ratio for error message display
+			ratio := float32(throughput) / float32(iops)
+			allErrs = append(allErrs, field.Invalid(
+				fldPath.Child("throughput"),
+				throughput,
+				fmt.Sprintf("throughput (MiBps) to iops ratio of %.6f is too high; maximum is %.6f MiBps per iops. When iops is not set, AWS defaults to %d iops. Please set iops to at least %d to satisfy the constraint", ratio, maxThroughputIopsRatio, gp3DefaultIOPS, minIOPS),
+			))
 		}
 	default:
 		allErrs = append(allErrs, field.Invalid(fldPath.Child("throughput"), throughput, fmt.Sprintf("throughput not supported for type %s", volumeType)))
diff --git a/pkg/types/aws/validation/machinepool_test.go b/pkg/types/aws/validation/machinepool_test.go
index cb54059a80..ec0a9bbb27 100644
--- a/pkg/types/aws/validation/machinepool_test.go
+++ b/pkg/types/aws/validation/machinepool_test.go
@@ -74,7 +74,7 @@ func TestValidateMachinePool(t *testing.T) {
 					IOPS: 10000,
 				},
 			},
-			expected: fmt.Sprintf("test-path.iops: Invalid value: 10000: iops not supported for type gp2"),
+			expected: "test-path.iops: Invalid value: 10000: iops not supported for type gp2",
 		},
 		{
 			name: "invalid zone",
@@ -96,7 +96,7 @@ func TestValidateMachinePool(t *testing.T) {
 					Size: 128,
 				},
 			},
-			expected: fmt.Sprintf("test-path.type: Invalid value: \"bad-volume-type\": failed to find volume type bad-volume-type"),
+			expected: "test-path.type: Invalid value: \"bad-volume-type\": failed to find volume type bad-volume-type",
 		},
 		{
 			name: "invalid volume size using negative",
@@ -107,7 +107,7 @@ func TestValidateMachinePool(t *testing.T) {
 					IOPS: 10000,
 				},
 			},
-			expected: fmt.Sprintf("test-path.size: Invalid value: -1: volume size value must be a positive number"),
+			expected: "test-path.size: Invalid value: -1: volume size value must be a positive number",
 		},
 		{
 			name: "invalid metadata auth option",
@@ -119,15 +119,49 @@ func TestValidateMachinePool(t *testing.T) {
 			expected: `^test-path\.authentication: Invalid value: \"foobarbaz\": must be either Required or Optional$`,
 		},
 		{
-			name: "valid root volume throughput, within allowed range",
+			name: "valid root volume throughput with sufficient iops",
 			pool: &aws.MachinePool{
 				EC2RootVolume: aws.EC2RootVolume{
 					Type:       "gp3",
 					Size:       100,
 					Throughput: ptr.To(int32(1200)),
+					IOPS:       4800, // 1200 / 4800 = 0.25, which is the maximum allowed ratio
 				},
 			},
 		},
+		{
+			name: "valid root volume throughput with default iops (within ratio)",
+			pool: &aws.MachinePool{
+				EC2RootVolume: aws.EC2RootVolume{
+					Type:       "gp3",
+					Size:       100,
+					Throughput: ptr.To(int32(750)), // 750 / 3000 = 0.25, which is the maximum allowed ratio
+				},
+			},
+		},
+		{
+			name: "invalid root volume throughput, exceeds ratio with default iops",
+			pool: &aws.MachinePool{
+				EC2RootVolume: aws.EC2RootVolume{
+					Type:       "gp3",
+					Size:       100,
+					Throughput: ptr.To(int32(1200)), // 1200 / 3000 = 0.4 > 0.25
+				},
+			},
+			expected: `^test-path\.throughput: Invalid value: 1200: throughput \(MiBps\) to iops ratio of 0\.400000 is too high; maximum is 0\.250000 MiBps per iops\. When iops is not set, AWS defaults to 3000 iops\. Please set iops to at least 4800 to satisfy the constraint$`,
+		},
+		{
+			name: "invalid root volume throughput, exceeds ratio with explicit iops",
+			pool: &aws.MachinePool{
+				EC2RootVolume: aws.EC2RootVolume{
+					Type:       "gp3",
+					Size:       100,
+					Throughput: ptr.To(int32(1000)),
+					IOPS:       3000, // 1000 / 3000 = 0.333 > 0.25
+				},
+			},
+			expected: `^test-path\.throughput: Invalid value: 1000: throughput \(MiBps\) to iops ratio of 0\.333333 is too high; maximum is 0\.250000 MiBps per iops\. When iops is not set, AWS defaults to 3000 iops\. Please set iops to at least 4000 to satisfy the constraint$`,
+		},
 		{
 			name: "valid root volume throughput, nil or unspecified",
 			pool: &aws.MachinePool{